JP3295499B2 - Lubricating oil dilution and refrigerant component ratio detection device - Google Patents
Lubricating oil dilution and refrigerant component ratio detection deviceInfo
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- JP3295499B2 JP3295499B2 JP24434693A JP24434693A JP3295499B2 JP 3295499 B2 JP3295499 B2 JP 3295499B2 JP 24434693 A JP24434693 A JP 24434693A JP 24434693 A JP24434693 A JP 24434693A JP 3295499 B2 JP3295499 B2 JP 3295499B2
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- refrigerant
- lubricating oil
- temperature
- viscosity
- calculating
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、圧縮機内部における
潤滑油の希釈度と混合冷媒の冷媒成分比を検出する潤滑
油の希釈度及び冷媒の成分比検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil dilution ratio and refrigerant component ratio detecting device for detecting a lubrication oil dilution ratio and a refrigerant component ratio of a mixed refrigerant in a compressor.
【０００２】[0002]
【従来の技術】従来、エアコン等の空気調和装置に使用
されている現在の冷媒は、地球環境保護のために全廃さ
れる方向にあり、それに変わって地球環境に優しい数種
の冷媒を、ある比率で混合した混合冷媒が有力視されて
いる。2. Description of the Related Art At present, refrigerants used in air conditioners such as air conditioners have been abolished for the protection of the global environment. The mixed refrigerant mixed in the ratio is considered promising.
【０００３】その際、混合する冷媒が沸点の異なる非共
沸冷媒であると、初めに封入された冷媒成分比と、運転
中の冷凍サイクル内での冷媒成分比は、運転中の圧力及
び温度の影響を受けるため、必ずしも一致した状態にあ
るとは限らない。そのために、運転中の冷媒成分比を的
確に把握する必要がある。At this time, if the refrigerant to be mixed is a non-azeotropic refrigerant having a different boiling point, the refrigerant component ratio initially enclosed and the refrigerant component ratio in the refrigeration cycle during operation are determined by the pressure and temperature during operation. Are not necessarily in the same state. Therefore, it is necessary to accurately grasp the refrigerant component ratio during operation.
【０００４】また、圧縮機内部においては、回転部、摺
動部の摩耗の問題があり、圧縮機の信頼性を確保するた
めには、潤滑油の冷媒による希釈状態（希釈度）を充分
に把握しておく必要がある。Further, there is a problem of abrasion of the rotating and sliding parts inside the compressor, and in order to ensure the reliability of the compressor, the lubricating oil should be sufficiently diluted with the refrigerant (degree of dilution). You need to know.
【０００５】[0005]
【発明が解決しようとする課題】前記した如く良好な運
転状態を確保するためには、潤滑油の希釈度と、冷媒の
成分比を把握する必要があり、そのための手段として、
例えば、特開平２−１００６１号公報記載のものが知ら
れている。In order to ensure a good operating condition as described above, it is necessary to grasp the degree of dilution of the lubricating oil and the component ratio of the refrigerant.
For example, those of JP-2 -10 061 JP are known.
【０００６】この手段は、潤滑油と単一冷媒の二要素の
場合だけ有効であり、潤滑油と２種成分の混合冷媒から
成る三要素の場合には、使用できない問題が残る。This means is effective only in the case of the two components of the lubricating oil and the single refrigerant. In the case of the three components composed of the lubricating oil and the mixed refrigerant of the two components, there remains a problem that it cannot be used.
【０００７】そこで、この発明は、潤滑油の希釈度と２
種成分の混合冷媒の成分比がわかるようにした潤滑油の
希釈度及び冷媒の成分比検出装置を提供することを目的
としている。[0007] Therefore, the present invention relates to a diluent of lubricating oil and 2
It is an object of the present invention to provide a lubricating oil dilution ratio and refrigerant component ratio detection device that can determine the component ratio of a mixed refrigerant of seed components.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するため
に、この発明は、圧力容器内に封入され、潤滑油と２種
成分の冷媒が混合された混合液体中の電極間の静電容量
を検出する静電容量検出装置と、潤滑油の粘度を検出す
る粘度検出装置と、混合液体の温度を検出する温度検出
装置と、少なくとも各温度に対する粘度値の情報が入力
され前記粘度検出装置からの出力値と、温度検出装置か
らの出力値に基づいて潤滑油の希釈度を求める希釈度演
算装置と、少なくとも各温度に対する冷媒及び潤滑油の
比誘電率の情報が入力され、静電容量検出装置及び粘度
検出装置からの出力値と、温度検出装置からの出力値に
基づいて各冷媒の成分比を求める冷媒成分比演算装置と
から成っている。In order to achieve the above-mentioned object, the present invention relates to an electrostatic capacity between electrodes in a mixed liquid in which lubricating oil and a two-component refrigerant are mixed in a pressure vessel. , A viscosity detection device for detecting the viscosity of the lubricating oil, a temperature detection device for detecting the temperature of the mixed liquid, and at least information of the viscosity value for each temperature is input and the viscosity detection device And a dilution degree calculating device for calculating the degree of dilution of the lubricating oil based on the output value of the temperature detecting device, and at least information of the relative permittivity of the refrigerant and the lubricating oil at each temperature are inputted, and the capacitance detection is performed. It is composed of an output value from the device and the viscosity detection device, and a refrigerant component ratio calculation device for obtaining a component ratio of each refrigerant based on an output value from the temperature detection device.
【０００９】[0009]
【作用】かかる装置によれば、希釈度演算装置に、粘度
検出装置及び温度検出装置から混合液体の粘度値と温度
値が入力されることで、それら出力値に基づき希釈度演
算装置によって潤滑油の希釈度が求められるようにな
る。According to this device, the viscosity value and the temperature value of the mixed liquid are input from the viscosity detecting device and the temperature detecting device to the dilution degree calculating device, and the lubricating oil is calculated by the dilution degree calculating device based on the output values. Is determined.
【００１０】また、各冷媒の成分比は、成分比演算装置
に、静電容量検出装置及び粘度検出装置並びに温度検出
装置から各静電容量値と粘度値と温度値が入力され、そ
れら出力値に基づき（成分比演算装置によって）求めら
れる。Further, the component ratio of each refrigerant in component ratio calculation unit, each of the electrostatic capacitance values from the capacitance detection device and a viscosity detector and the temperature detector and the viscosity values and temperature values are entered, they output It is determined based on the value (by the component ratio calculator).
【００１１】この場合、前記希釈度演算装置により既に
算出された潤滑油の希釈度を用い、さらに、潤滑油と冷
媒とで、比誘電率が異なることを利用して、冷媒成分比
演算装置において所定の温度での静電容量値に基づい
て、その温度での混合液体の比誘電率が判明すれば、潤
滑油中の各冷媒成分比が求められるようになる。In this case, using the dilution degree of the lubricating oil already calculated by the dilution degree calculating device, and utilizing the fact that the relative dielectric constants of the lubricating oil and the refrigerant are different, the refrigerant component ratio calculating device If the relative permittivity of the mixed liquid at that temperature is determined based on the capacitance value at a predetermined temperature, the ratio of each refrigerant component in the lubricating oil can be obtained.
【００１２】[0012]
【実施例】以下、図１乃至図３の図面を参照しながらこ
の発明の一実施例を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
【００１３】図１において１は、空気調和装置の圧力容
器を示しており、圧力容器１内には、潤滑油と２種成分
の冷媒が混合された混合液体３が封入されている。In FIG. 1, reference numeral 1 denotes a pressure vessel of an air conditioner, in which a mixed liquid 3 in which lubricating oil and two kinds of refrigerants are mixed is sealed.
【００１４】さらに、圧力容器１には静電容量検出装置
５の検出部７と、粘度検出装置９の検出部１１と、温度
検出装置１３の検出部１５がそれぞれ設けられている。Further, the pressure vessel 1 is provided with a detection unit 7 of the capacitance detection device 5, a detection unit 11 of the viscosity detection device 9, and a detection unit 15 of the temperature detection device 13, respectively.
【００１５】静電容量検出装置５と粘度検出装置９と温
度検出装置１３からの検出値は、各冷媒の成分比を求め
る冷媒成分比演算装置１７に入力される。The detected values from the capacitance detecting device 5, the viscosity detecting device 9 and the temperature detecting device 13 are inputted to a refrigerant component ratio calculating device 17 for calculating the component ratio of each refrigerant.
【００１６】また、粘度検出装置９と温度検出装置１３
からの検出値は、潤滑油の希釈度を求める希釈度演算装
置１９に入力されるようになっている。The viscosity detector 9 and the temperature detector 13
Are input to the dilution degree calculating device 19 for calculating the dilution degree of the lubricating oil.
【００１７】静電容量検出装置５は、電極Ｐ間の静電容
量値から混合液体３の比誘電率εｒが算出されるように
なっている。即ち、電極Ｐ間の距離ｄ，面積Ｓ、真空中
の誘電率εｏ（定数）、検出された静電容量値Ｃｒとす
ると、混合液体３の比誘電率εｒは、式The capacitance detecting device 5 calculates the relative dielectric constant εr of the mixed liquid 3 from the capacitance value between the electrodes P. That is, assuming that the distance d between the electrodes P, the area S, the dielectric constant εo in vacuum (constant), and the detected capacitance value Cr, the relative dielectric constant εr of the mixed liquid 3 is given by the following equation.
【数１】 によって求められるようになる。(Equation 1) Will be required by
【００１８】粘度検出装置９は、混合液体３の粘度値を
検出するものである。粘度値は、図３に示すように各温
度に対して、潤滑油単体の粘度値Ｑ１と、数種の冷媒単
体の粘度値Ｑ２との間には、約１００倍以上の開きが認
められる。The viscosity detecting device 9 detects a viscosity value of the mixed liquid 3. As shown in FIG. 3, for each temperature, the viscosity value Q1 of the lubricating oil alone and the viscosity value Q2 of several kinds of the refrigerant alone show an opening of about 100 times or more at each temperature.
【００１９】温度検出装置１３は、混合液体３の温度を
検出するよう機能する。The temperature detecting device 13 functions to detect the temperature of the mixed liquid 3.
【００２０】希釈度演算装置１９は、図２に示すような
各温度に対する混合液体の粘度と冷媒による潤滑油の希
釈度の情報が予め入力されており、入力される信号に基
づいて演算処理することで混合液体の希釈度が求められ
るようになっている。The dilution degree calculating device 19 is preliminarily input with information on the viscosity of the mixed liquid and the degree of dilution of the lubricating oil by the refrigerant as shown in FIG. 2, and performs arithmetic processing based on the input signals. Thus, the degree of dilution of the mixed liquid can be obtained.
【００２１】冷媒成分比演算装置１７は、図４に示すよ
うに、例えば、ある温度Ｔの時の２種の冷媒Ｒ１，Ｒ２
と、潤滑油の比誘電率ε１，ε２，εｏｉｌの情報と、
静電容量検出値５から求められる比誘電率εｒの情報
と、混合された２種の冷媒の比誘電率εＲを式から算
出する情報と、 εＲ＝｛（εｒ・εｏｉｌ）／Ｄ＋εｏｉｌ｝ … 混合された２種の冷媒の比誘電率εＲから例えば冷媒Ｒ
１の成分比ＳＲ１を式から算出する情報が入力されて
いる。As shown in FIG. 4, for example, the refrigerant component ratio calculating device 17 includes two types of refrigerants R1 and R2 at a certain temperature T.
And information on the relative permittivity ε1, ε2, εoil of the lubricating oil,
Information on the relative permittivity εr obtained from the capacitance detection value 5 and information on calculating the relative permittivity εR of the two kinds of mixed refrigerants from the formula, and εR = {(εr · εoil) / D + εoil}. From the relative dielectric constants εR of the two kinds of refrigerants, for example, the refrigerant R
Information for calculating the component ratio SR1 of 1 from the equation is input.
【００２２】 ＳＲ１＝（εＲ−ε２）／（ε１−ε２） … この場合、冷媒Ｒ１と冷媒Ｒ２の成分比率ＳＲ１，ＳＲ
２を、ＳＲ１＋Ｓ２＝１であるから、他の冷媒の成分比
率ＳＲ２はＳＲ２＝１−ＳＲ１により容易に求められ
る。SR1 = (εR−ε2) / (ε1−ε2) In this case, the component ratios SR1 and SR of the refrigerant R1 and the refrigerant R2
2, since SR1 + S2 = 1, the component ratio SR2 of the other refrigerant can be easily obtained by SR2 = 1−SR1.
【００２３】一方、式において、Ｄは潤滑油の希釈度
を示しており、混合冷媒の体積をＶＲ、潤滑油の体積を
Ｖｏｉｌとした時に、 Ｄ＝ＶＲ／（ＶＲ＋Ｖｏｉｌ） … によって求められるものである。On the other hand, in the equation, D represents the degree of dilution of the lubricating oil, and when the volume of the mixed refrigerant is VR and the volume of the lubricating oil is Voil, it is obtained by D = VR / (VR + Voil). is there.
【００２４】この場合、式から次の式が定義される。
即ち、In this case, the following equation is defined from the equation.
That is,
【数２】 となり、これを整理すると、｛ＶＲ／（ＶＲ＋Ｖｏｉ
ｌ）｝は式からＤとイコールでありまた、｛Ｖｏｉｌ
／（ＶＲ＋Ｖｏｉｌ）｝については、(Equation 2) When this is arranged, ｛VR / (VR + Voi
l)｝ is equal to D from the formula, and ｛Voil
/ (VR + Voil)｝
【数３】 式が得られる。この式をεＲについて整理すると、 εＲ＝｛（εｒ−εｏｉｌ）／Ｄ｝＋εｏｉｌ となるもので、前記式が導き出されるようになる。(Equation 3) An expression is obtained. When this equation is rearranged for εR, εR = ｛(εr−εoil) / D｝ + εoil, and the above equation is derived.
【００２５】このように構成された検出装置によれば、
粘度検出装置９からの粘度値と、温度検出装置１３から
の温度値が希釈度演算装置１９に入力されることで、そ
の入力信号に基づき演算処理され潤滑油の希釈度が算出
されるようになる。According to the detection device configured as described above,
By inputting the viscosity value from the viscosity detection device 9 and the temperature value from the temperature detection device 13 to the dilution degree calculation device 19, the dilution degree of the lubricating oil is calculated based on the input signal. Become.
【００２６】また、静電容量検出装置５からの静電容量
値と、粘度検出装置９からの粘度値と、温度検出装置１
３からの温度値が冷媒成分比演算装置１７に入力される
ことで、その入力信号に基づいて各冷媒Ｒ１，Ｒ２の成
分比ＳＲ１，ＳＲ２が算出されるようになる。Further, the capacitance value of the electrostatic capacitance detection device 5, and the viscosity value from viscosity detection device 9, the temperature detection device 1
By inputting the temperature value from 3 to the refrigerant component ratio calculating device 17, the component ratios SR1 and SR2 of the refrigerants R1 and R2 are calculated based on the input signal.
【００２７】この場合、運転中の圧力容器１から直接検
出されるため、リアルタイムに精度良く計測することが
可能となる。In this case, since the pressure is directly detected from the pressure vessel 1 during operation, it is possible to accurately measure in real time.
【００２８】[0028]
【発明の効果】以上、説明したように、この発明によれ
ば、冷媒による潤滑油の希釈度と、２種成分の冷媒成分
比を精度よく、しかも、リアルタイムに計測できるよう
になり、運転条件に対応した好適な冷凍サイクル運転が
行なえるようになる。As described above, according to the present invention, the degree of dilution of the lubricating oil with the refrigerant and the ratio of the refrigerant components of the two components can be measured accurately and in real time. A suitable refrigeration cycle operation corresponding to the above can be performed.
【図１】この発明を実施した検出装置の説明図。FIG. 1 is an explanatory diagram of a detection device embodying the present invention.
【図２】冷媒と潤滑油における粘度と希釈度との関係を
示した説明図。FIG. 2 is an explanatory diagram showing a relationship between a viscosity and a dilution degree of a refrigerant and a lubricating oil.
【図３】冷媒と潤滑油における粘度と温度との関係を示
した説明図。FIG. 3 is an explanatory diagram showing a relationship between viscosity and temperature in a refrigerant and a lubricating oil.
【図４】冷媒と潤滑油における比誘電率と温度との関係
を示した説明図。FIG. 4 is an explanatory diagram showing a relationship between relative permittivity and temperature in refrigerant and lubricating oil.
１ 圧力容器 ５ 静電容量検出装置 ９ 粘度検出装置 １３ 温度検出装置 １７ 冷媒成分比演算装置 １９ 希釈度演算装置 REFERENCE SIGNS LIST 1 pressure vessel 5 capacitance detecting device 9 viscosity detecting device 13 temperature detecting device 17 refrigerant component ratio calculating device 19 dilution degree calculating device
フロントページの続き (72)発明者 本橋 秀明 神奈川県横浜市磯子区新杉田町８番地 株式会社東芝 住空間システム技術研究 所内 (56)参考文献 特開 昭59−129366（ＪＰ，Ａ) 特開 平４−314993（ＪＰ，Ａ) 特開 平５−5565（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 43/00 - 49/04 Continuation of the front page (72) Inventor Hideaki Motohashi 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Toshiba Corporation Living Space Systems Research Laboratory (56) References JP-A-59-129366 (JP, A) JP-A-4 −314993 (JP, A) JP-A-5-5565 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F25B 43/00-49/04
Claims (2)
分の冷媒が混合された混合液体中の電極間の静電容量を
検出する静電容量検出装置と、潤滑油の粘度を検出する
粘度検出装置と、混合液体の温度を検出する温度検出装
置と、少なくとも各温度に対する粘度値の情報が入力さ
れ前記粘度検出装置からの出力値と、温度検出装置から
の出力値に基づいて潤滑油の希釈度を求める希釈度演算
装置と、少なくとも各温度に対する冷媒及び潤滑油の比
誘電率の情報が入力され、静電容量検出装置及び粘度検
出装置からの出力値と、温度検出装置からの出力値に基
づいて各冷媒の成分比を求める冷媒成分比演算装置とか
ら成ることを特徴とする潤滑油の希釈度及び冷媒の成分
比検出装置。1. A capacitance detecting device for detecting a capacitance between electrodes in a mixed liquid in which lubricating oil and two kinds of refrigerant are mixed, which is sealed in a pressure vessel, and detects a viscosity of the lubricating oil. A viscosity detecting device, a temperature detecting device for detecting the temperature of the mixed liquid, and at least information of a viscosity value for each temperature is input, and an output value from the viscosity detecting device and a lubrication based on an output value from the temperature detecting device are provided. Dilution degree calculation device for calculating oil dilution degree, and information of relative permittivity of refrigerant and lubricating oil at least for each temperature are input, output values from capacitance detection device and viscosity detection device, and from temperature detection device A refrigerant component ratio calculating device for calculating a component ratio of each refrigerant based on an output value; a lubricating oil dilution ratio and refrigerant component ratio detecting device.
から求められた静電容量値に基づき３種混合の混合液体
の比誘電率を求める混合液体比誘電率算出手段と、潤滑
油の比誘電率及び希釈度並びに前記混合液体の比誘電率
から混合された２種の冷媒の比誘電率を求める２種冷媒
比誘電率算出手段と、２つの冷媒の比誘電率と混合され
た２種の冷媒の比誘電率とから２つの冷媒の成分比を求
める冷媒成分比算出手段とから成る混合冷媒の成分比検
出装置。2. A capacitance detecting means, a mixed liquid relative permittivity calculating means for obtaining a relative permittivity of a mixed liquid of three kinds based on a capacitance value obtained from the capacitance detecting means, and a lubricating oil. Two kinds of refrigerant relative permittivity calculating means for calculating the relative permittivity of the two kinds of refrigerant mixed from the relative permittivity and the degree of dilution of the mixed liquid and the relative permittivity of the mixed liquid, and the relative permittivity of the two refrigerants. A refrigerant ratio calculating unit for calculating a component ratio of the two refrigerants from a relative dielectric constant of the two refrigerants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24434693A JP3295499B2 (en) | 1993-09-30 | 1993-09-30 | Lubricating oil dilution and refrigerant component ratio detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24434693A JP3295499B2 (en) | 1993-09-30 | 1993-09-30 | Lubricating oil dilution and refrigerant component ratio detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0798168A JPH0798168A (en) | 1995-04-11 |
| JP3295499B2 true JP3295499B2 (en) | 2002-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24434693A Expired - Fee Related JP3295499B2 (en) | 1993-09-30 | 1993-09-30 | Lubricating oil dilution and refrigerant component ratio detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3295499B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749348A (en) * | 2013-12-31 | 2015-07-01 | 丹佛斯（天津）有限公司 | Method for measuring dilutability and viscosity of lubricating oil, control method and module and refrigerating air-conditioning system |
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| JP4513238B2 (en) * | 2001-06-20 | 2010-07-28 | 株式会社富士通ゼネラル | Hermetic compressor |
| EP1614870B1 (en) | 2004-07-06 | 2011-12-14 | Volvo Car Corporation | A method and a counter for predicting a fuel dilution level of an oil in an internal combustion engine |
| JP6202274B2 (en) * | 2014-03-28 | 2017-09-27 | 株式会社富士通ゼネラル | Air conditioner |
| JP6472639B2 (en) * | 2014-10-31 | 2019-02-20 | 株式会社鷺宮製作所 | Liquid detection unit, compressor and air conditioner |
| CN106197530B (en) * | 2015-05-08 | 2021-06-08 | 丹佛斯（天津）有限公司 | Method for measuring dilution of lubricating oil, sensor and method for detecting oil level |
| WO2017062620A1 (en) * | 2015-10-07 | 2017-04-13 | Honeywell International Inc. | Recharging systems and methods |
| JP6628815B2 (en) * | 2016-02-02 | 2020-01-15 | 三菱電機株式会社 | Refrigerant compression device and refrigeration device |
| JP7216306B2 (en) * | 2021-03-31 | 2023-02-01 | ダイキン工業株式会社 | Oil concentration detection system |
-
1993
- 1993-09-30 JP JP24434693A patent/JP3295499B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749348A (en) * | 2013-12-31 | 2015-07-01 | 丹佛斯（天津）有限公司 | Method for measuring dilutability and viscosity of lubricating oil, control method and module and refrigerating air-conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0798168A (en) | 1995-04-11 |
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