JP2556547B2 - Lubricating oil for CFC compressors for car air conditioners - Google Patents
Lubricating oil for CFC compressors for car air conditionersInfo
- Publication number
- JP2556547B2 JP2556547B2 JP63085346A JP8534688A JP2556547B2 JP 2556547 B2 JP2556547 B2 JP 2556547B2 JP 63085346 A JP63085346 A JP 63085346A JP 8534688 A JP8534688 A JP 8534688A JP 2556547 B2 JP2556547 B2 JP 2556547B2
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- lubricating oil
- car air
- compressor
- air conditioner
- cfc
- Prior art date
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、フロンを冷媒として使用する圧縮機用潤滑
油に関するものであり、特に、フロンのうちでも塩素を
含まないフロンR134a（1,1,1,2−テトラフルオロエタ
ン）を圧縮する際に用いるのに好適な潤滑油に関するも
のである。Description: TECHNICAL FIELD The present invention relates to a lubricating oil for a compressor using Freon as a refrigerant, and in particular, Freon R134a (1,1) which does not contain chlorine among Freons. , 1,2-Tetrafluoroethane), and a lubricant suitable for use in compressing (1,2,4-tetrafluoroethane).
（従来の技術） 従来、冷凍機、空調機、冷蔵庫等には冷媒としてフッ
素と塩素を構成元素とするフロン、例えばR11（トリク
ロロモノフルオロメタン）、R12（ジクロロジフルオロ
メタン）、R22（モノクロロジフルオロメタン）等のフ
ロンが使用されているが、最近のオゾン層破壊問題に関
連し、これへの影響が無い新しいタイプの冷媒としてR1
34aのフロンが出現し始めている。(Prior Art) Conventionally, in a refrigerator, an air conditioner, a refrigerator, etc., a CFC having fluorine and chlorine as constituent elements as a refrigerant, for example, R11 (trichloromonofluoromethane), R12 (dichlorodifluoromethane), R22 (monochlorodifluoromethane). ) Is used as a new type of refrigerant that is related to the recent ozone depletion problem and has no effect on it.
34a Freon is starting to appear.
一方フロン圧縮機用潤滑油に関しては、従来、鉱油系
や合成油系のものが多数知られているが、これらは前記
新しいフロンR134aに対しては、低温での相溶性が全く
悪く使用できないことが分かった。従って、今日この対
策が重要な課題となってきた。また、この他にも冷媒機
油に必要な性能には、潤滑性、省エネルギー性、耐摩耗
性、密封性、耐熱性、スラッジ析出防止性が挙げられ、
これらの点についても考慮が必要である。On the other hand, with regard to CFC compressor lubricating oils, many mineral oil-based and synthetic oil-based lubricants have been conventionally known, but these are completely incompatible with the new CFC R134a at low temperatures and cannot be used. I understood. Therefore, this measure has become an important issue today. In addition to these, the performance required for the refrigerant machine oil includes lubricity, energy saving, wear resistance, sealability, heat resistance, sludge precipitation prevention,
It is necessary to consider these points as well.
因みに、従来知られている合成油の例としてポリエー
テル系合成潤滑油があり、これについては油化学誌，第
29巻，第９号，第336〜343頁（1980）およびペトロテッ
ク誌，第８巻，第６号，第562〜566頁（1985）に紹介が
ある。また、特開昭61−281199号公報には次式、 R1〔Ｏ−（R2O）−R3〕ｎ で表わされるポリグリコールとアルキルベンゼン等の混
合物、特開昭57−63395号にはポリエーテル、例えば付
加モル数53のように高分子量のポリオキシプロピレンモ
ノブチルエーテルにエポキシシクロアルキル系化合物を
混合した油、また特開昭59−117590号公報にはポリエー
テル系化合物とパラフィン系又はナフテン系鉱油の高粘
度混合油が夫々紹介されている。Incidentally, examples of conventionally known synthetic oils include polyether-based synthetic lubricating oils.
29, No. 9, 336-343 (1980) and Petrotech magazine, Vol. 8, No. 6, 562-566 (1985). Further, JP-A-61-281199 discloses a mixture of polyglycol represented by the following formula, R 1 [O- (R 2 O) -R 3 ] n and alkylbenzene, and JP-A-57-63395. Polyether, for example, an oil obtained by mixing an epoxycycloalkyl compound with a high molecular weight polyoxypropylene monobutyl ether having an addition mole number of 53, and JP-A-59-117590 discloses a polyether compound and a paraffinic or naphthene High viscosity mixed oils of mineral oils are introduced respectively.
（発明が解決しようとする課題） しかしながら、上述の既知の合成油系の潤滑油はいず
れも相溶性等の問題からフロンR134a圧縮機用の潤滑油
にはなり得なかった。(Problems to be Solved by the Invention) However, none of the above-mentioned known synthetic oil-based lubricating oils can be used as a lubricating oil for a Freon R134a compressor because of problems such as compatibility.
一方、鉱油系についても検討を行ったが、現在までの
ところ好ましい結果が得られていないのが実情である。On the other hand, although mineral oil-based materials were also examined, the actual situation is that favorable results have not been obtained so far.
特に、カーエアコンに使用する場合には、ゴムホース
に対する潤滑性が大きな要因となるため、ゴムへの浸透
性が小きく、ゴムの膨潤を抑制することが必要不可欠で
ある。In particular, when used in a car air conditioner, the lubricity of the rubber hose is a major factor, so the permeability to rubber is small and it is essential to suppress swelling of rubber.
本発明の目的は、カーエアコン用のフロン圧縮機用の
潤滑油において、特に新しい冷媒であるフロンR134aに
対して、広い温度範囲にわたって極めて相溶性が良く、
かつゴムに対する浸透性が小さく、ゴムの膨潤を抑制で
きるようにすることである。An object of the present invention is to provide a lubricating oil for a Freon compressor for a car air conditioner, particularly with respect to Freon R134a which is a new refrigerant, having extremely good compatibility over a wide temperature range
In addition, it has a low permeability to rubber and can suppress the swelling of rubber.
（課題を解決するための手段） 本発明者は各種の鉱油並びに合成油を対象に上記課題
解決のために鋭意研究を進めたところ、特定のポリオキ
シプロピレングリコールモノアルキルエーテルが本発明
の目的達成に有効であることを見い出し、本発明を完成
するに至った。(Means for Solving the Problem) The present inventor has conducted diligent research for solving the above-mentioned problems, targeting various mineral oils and synthetic oils. As a result, a specific polyoxypropylene glycol monoalkyl ether has achieved the object of the present invention. It has been found that the present invention is effective, and has completed the present invention.
本発明は、1,1,1,2−テトラフルオロエタンを冷媒と
して用いるカーエアコン用フロン圧縮機に使用するため
の潤滑油であって、 平均分子量300〜1200を有する次の一般式（Ｉ） （式中のＲは炭素数１〜８個のアルキル基、ｎは４〜19
の整数を示す）で表される化合物を基油とし、この基油
に対するアクリロニトリル−ブタジエンゴムの120℃,12
0時間の条件下における膨潤率が５％以下であることを
特徴とする、カーエアコン用フロン圧縮機用潤滑油に係
るものである。The present invention provides a lubricating oil for use in a Freon compressor for a car air conditioner using 1,1,1,2-tetrafluoroethane as a refrigerant, which has the following general formula (I) having an average molecular weight of 300 to 1200. (In the formula, R is an alkyl group having 1 to 8 carbon atoms, n is 4 to 19
Of the acrylonitrile-butadiene rubber at 120 ° C., 12
The present invention relates to a lubricating oil for a Freon compressor for a car air conditioner, which has a swelling ratio of 5% or less under a condition of 0 hours.
本発明で基油として使用するポリオキシプロピレング
リコールモノアルキルエーテルは、プロピレンオキサイ
ドの付加重合で得られるポリオキシプロピレングリコー
ル（ポリエーテル）の末端水素のモノアルキル置換体で
あるが、そのうちでも本発明で使用するものは前記一般
式（Ｉ）で表わされる構造を有し、その平均分子量が30
0〜1200の範囲内のもので、しかも末端の置換アルキル
基が炭素数１〜８個を有することを要するものである。
かかるポリオキシプロピレングリコールモノアルキルエ
ーテルは、例えば日本油脂（株）製のユニルーブ（商品
名）や三洋化成工業（株）製のサンニックス（商品名）
として市場において入手することができる。The polyoxypropylene glycol monoalkyl ether used as the base oil in the present invention is a monoalkyl-substituted product of the terminal hydrogen of polyoxypropylene glycol (polyether) obtained by the addition polymerization of propylene oxide. The one used has a structure represented by the above general formula (I) and has an average molecular weight of 30.
It is in the range of 0 to 1200, and it is necessary that the terminal substituted alkyl group has 1 to 8 carbon atoms.
Such polyoxypropylene glycol monoalkyl ether is, for example, UNILOVE (trade name) manufactured by NOF CORPORATION or SANNIX (trade name) manufactured by Sanyo Chemical Industry Co., Ltd.
As available in the market.
本発明において、前記一般式（Ｉ）で表わされる化合
物の平均分子量を前記範囲内のものに限定する理由は次
の通りである。In the present invention, the reason why the average molecular weight of the compound represented by the general formula (I) is limited to the above range is as follows.
カーエアコンに使用する場合、高温のゴムホースを通
して潤滑油を流すために、ゴムホースへの潤滑油の浸透
および膨潤による悪影響を防止する必要がある。ここ
で、前記化合物の平均分子量が300未満であると、ゴム
ホースに対する浸透性が大きくなり、ゴムホースの膨潤
が生ずるので、平均分子量が300以上のものを選定する
ことは不可欠である。一方、分子量が1200を超えるとフ
ロンR134aとの相溶性が低下し、本発明の目的を達成し
得なくなる。一般に、冷凍機油と冷媒との相溶性、つま
り二相分離温度に至るまでの特性は低温特性としてみる
が、冷媒がフロンR134aの場合にはかかる従来の挙動と
は異なり、低温分離と共に高温での二相分離温度も存在
する。このために、本発明では特に分子量を1200以下に
設定し、広い温度範囲に亘り溶相性を満足するようにし
ようとするものである。因みに、相溶性の悪い油はコン
プレッサーへの油戻りが悪く、コンプレッサーの焼き付
きの原因となる。When used in a car air conditioner, since the lubricating oil flows through a high temperature rubber hose, it is necessary to prevent adverse effects due to the penetration and swelling of the lubricating oil into the rubber hose. Here, if the average molecular weight of the compound is less than 300, the permeability to the rubber hose becomes large and the rubber hose swells. Therefore, it is indispensable to select a compound having an average molecular weight of 300 or more. On the other hand, if the molecular weight exceeds 1200, the compatibility with Freon R134a decreases and the object of the present invention cannot be achieved. Generally, the compatibility of refrigerating machine oil and a refrigerant, that is, the characteristic up to the two-phase separation temperature is considered as a low temperature characteristic. There are also two-phase separation temperatures. For this reason, in the present invention, the molecular weight is particularly set to 1200 or less so as to satisfy the compatibility with a wide temperature range. By the way, oil with poor compatibility has a poor oil return to the compressor and causes seizure of the compressor.
尚、分子量が本発明の300〜1200の範囲内であって
も、前記（Ｉ）式中のアルキル基の炭素数が９個以上の
ものではR134aフロンとの相溶性が悪く、実用の温度範
囲内で二相分離を引き起こし、冷凍機油として使用する
ことができない。Even if the molecular weight is in the range of 300 to 1200 of the present invention, if the alkyl group in the formula (I) has 9 or more carbon atoms, the compatibility with R134a CFC is poor and the temperature range of practical use is low. It causes two-phase separation inside and cannot be used as refrigerating machine oil.
本発明のフロン圧縮機用潤滑油において、R134aフロ
ンとの低温、高温での相溶性を一層好ましいものにする
ためには、前記（Ｉ）式の化合物のＲが炭素数２〜４個
で平均分子量が500〜1000、更に好ましくは600〜900の
もの、あるいはＲが炭素数５〜８で平均分子量が300〜8
00のものを選択するのが好ましい。また、潤滑性の面か
ら、100℃の粘度が４〜15cStのものを選択するのが好ま
しい。In the CFC compressor lubricating oil of the present invention, in order to make the compatibility with R134a CFC at low temperature and high temperature more preferable, R of the compound of the formula (I) has an average of 2 to 4 carbon atoms. Those having a molecular weight of 500 to 1000, more preferably 600 to 900, or R having 5 to 8 carbon atoms and an average molecular weight of 300 to 8
It is preferable to select 00. From the viewpoint of lubricity, it is preferable to select one having a viscosity of 4 to 15 cSt at 100 ° C.
上述の如く、R134aのフロンは従来の冷媒と挙動が異
なり、低温時だけでなく高温時での二相分離の問題があ
るが、本発明で使用するポリオキシプロピレングリコー
ルモノアルキルエーテルは低温と高温のいずれにおいて
も相溶性に優れ、また該フロン雰囲気下での潤滑性能、
熱安定性能も良好である。As mentioned above, R134a CFC behaves differently from conventional refrigerants and has a problem of two-phase separation not only at low temperature but also at high temperature.However, the polyoxypropylene glycol monoalkyl ether used in the present invention has low temperature and high temperature. Excellent compatibility in any of the above, the lubricating performance in the CFC atmosphere,
The thermal stability is also good.
尚、本発明のフロン圧縮機用潤滑油には、従来冷凍機
油用に使用されている酸化防止剤や塩酸捕捉剤を適宜添
加することができるのは勿論のことである。It is needless to say that an antioxidant and a hydrochloric acid scavenger conventionally used for refrigerating machine oil can be appropriately added to the fluorocarbon compressor lubricating oil of the present invention.
（実施例） 以下に実施例および比較例により本発明をより詳しく
説明する。(Example) Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
実施例１〜6,比較例１〜４ ポリオキシプロピレングリコールモノアルキルエーテ
ルとして以下の第１表に示すA1〜６およびA10〜13の供
試油（以上は日本油脂（株）ユニリーブMB−7,MB−14お
よび試製品）を使用して、フロンR134aの圧縮機用潤滑
油としての性能を評価した。Examples 1 to 6 and Comparative Examples 1 to 4 Sample oils of A1 to 6 and A10 to 13 shown in Table 1 below as polyoxypropylene glycol monoalkyl ether (the above are Nippon Oil & Fat Co., Ltd. Unilever MB-7, MB-14 and trial products) were used to evaluate the performance of Freon R134a as a compressor lubricating oil.
第１表に示す供試油の圧縮機用潤滑油としての性能と
して潤滑性、相溶性および熱安定性を下記に示す条件の
下で評価した。 As the performance of the test oils shown in Table 1 as lubricating oils for compressors, lubricity, compatibility and thermal stability were evaluated under the conditions shown below.
潤滑性 ASTM D−3233−73に準拠し、ファレックス（Falex）
焼付荷重を、フロンR134aを吹き込み（70ml/min）、雰
囲気を制御して測定した。Lubricity According to ASTM D-3233-73, Falex
The baking load was measured by blowing CFC R134a (70 ml / min) and controlling the atmosphere.
相溶性 供試油0.6gと冷媒（フロンR134a）2.4gとをガラスチ
ューブに封入した後、毎分１℃での冷却と昇温とを行
い、二相分離を起こす温度、すなわち二相分離温度を測
定した。Compatibility After enclosing 0.6 g of the test oil and 2.4 g of refrigerant (CFC R134a) in a glass tube, cooling at 1 ° C per minute and temperature rise are carried out to cause two-phase separation, that is, two-phase separation temperature. Was measured.
熱安定性 供試油1gと冷媒（フロンR134a）1gと触媒（鉄、銅、
アルミニウムの各線）をガラスチューブに封入した後、
175℃に加熱し、10日後に供試油の色相をASTM表示にて
判定した。Thermal stability 1 g of test oil, 1 g of refrigerant (CFC R134a) and catalyst (iron, copper,
After enclosing each wire of aluminum) in a glass tube,
The sample was heated to 175 ° C., and after 10 days, the hue of the sample oil was judged by ASTM display.
ゴム膨潤性 供試油に対するアクリロニトリル−ブタジエンゴムの
膨潤度（％）を120℃,120時間の条件下で評価した。Rubber swelling property The swelling degree (%) of acrylonitrile-butadiene rubber to the sample oil was evaluated under the conditions of 120 ° C and 120 hours.
上記評価結果を以下の第２表に示す。 The evaluation results are shown in Table 2 below.
第２表に示す評価結果より次のことが確認された。 From the evaluation results shown in Table 2, the following was confirmed.
実施例１〜６の供試油はいずれも二相分離温度は低温
側で十分低く、また高温側で十分高く、相溶性に優れて
いる。またスラッジの析出もなく潤滑性および熱安定性
に良好で、しかもゴム膨潤も低くゴム膨潤性にも優れて
いる。これら実施例のうち、特に供試油化合物の平均分
子量とアルキル基の炭素数とを本発明の好適範囲に設定
した実施例2,3,5,6では、より良好な潤滑油としての性
能を示している。The test oils of Examples 1 to 6 have excellent compatibility with the two-phase separation temperature being sufficiently low on the low temperature side and sufficiently high on the high temperature side. In addition, sludge is not deposited and the lubricity and heat stability are good, and the rubber swelling is low and the rubber swelling property is also excellent. Among these examples, particularly in Examples 2, 3, 5 and 6 in which the average molecular weight of the test oil compound and the number of carbon atoms of the alkyl group are set within the preferred range of the present invention, the performance as a better lubricating oil is obtained. Shows.
これに対し先ず比較例１の供試油は、相溶性は良好で
あるが潤滑性およびゴム膨潤性の面で劣り、好ましくな
い。また、比較例２および４の供試油は低温側での二相
分離温度が高く、相溶性に劣っている。更に、比較例３
の供試油は高温側での相溶性が不十分で、室温でコンプ
レッサが起動した場合に、下層部の冷媒相での油不足に
よる焼き付きの可能性がある。On the other hand, first, the sample oil of Comparative Example 1 has good compatibility, but is inferior in terms of lubricity and rubber swelling property, which is not preferable. Further, the sample oils of Comparative Examples 2 and 4 have a high two-phase separation temperature on the low temperature side and are poor in compatibility. Furthermore, Comparative Example 3
The test oil of (1) has insufficient compatibility on the high temperature side, and when the compressor starts at room temperature, there is a possibility of seizure due to lack of oil in the refrigerant phase in the lower layer.
（発明の効果） 以上説明したきたように、本発明のカーエアコン用フ
ロン圧縮機用潤滑油は、冷媒としてのR134aに対して十
分な相溶性を有しており、かつカーエアコンのゴムホー
ス等に対する浸透性が少なく、膨潤性が少ない。従っ
て、カーエアコン用フロン圧縮機用潤滑油において、R1
2や1R22フロンの代わりにR134aを用いても、従来システ
ムをそのまま使用できる。(Effects of the Invention) As described above, the lubricating oil for a Freon compressor for a car air conditioner of the present invention has sufficient compatibility with R134a as a refrigerant, and is suitable for a rubber hose or the like of a car air conditioner. Low permeability and low swelling. Therefore, in the lubricating oil for CFC compressors for car air conditioners, R1
Even if R134a is used instead of 2 or 1R22 CFC, the conventional system can be used as it is.
Claims (7)
を冷媒として用いるカーエアコン用フロン圧縮機に使用
するための潤滑油であって、 平均分子量300〜1200を有する次の一般式（Ｉ） （式中のＲは炭素数１〜８個のアルキル基、ｎは４〜19
の整数を示す）で表される化合物を基油とし、この基油
に対するアクリロニトリル−ブタジエンゴムの120℃,12
0時間の条件下における膨潤率が５％以下であることを
特徴とする、カーエアコン用フロン圧縮機用潤滑油。1. R134a (1,1,1,2-tetrafluoroethane)
A lubricating oil for use in a Freon compressor for a car air conditioner using as a refrigerant, having the following general formula (I) having an average molecular weight of 300 to 1200: (In the formula, R is an alkyl group having 1 to 8 carbon atoms, n is 4 to 19
Of the acrylonitrile-butadiene rubber at 120 ° C., 12
A lubricating oil for a Freon compressor for a car air conditioner, which has a swelling ratio of 5% or less under the condition of 0 hours.
個のアルキル基であり、平均分子量が500〜1000であ
る、請求項１記載のカーエアコン用フロン圧縮機用潤滑
油。2. In the above formula (I), R has 2 to 4 carbon atoms.
The lubricating oil for a Freon compressor for a car air conditioner according to claim 1, wherein each of the alkyl groups has an average molecular weight of 500 to 1,000.
個のアルキル基であり、平均分子量が300〜800である、
請求項１記載のカーエアコン用フロン圧縮機用潤滑油。3. In the above formula (I), R has 5 to 8 carbon atoms.
Is an alkyl group having an average molecular weight of 300 to 800,
The lubricating oil for a CFC compressor for a car air conditioner according to claim 1.
ジエンゴムの120℃,120時間の条件下における膨潤率が
3.9％以下であることを特徴とする、請求項１〜３のい
ずれか一つの請求項に記載のカーエアコン用フロン圧縮
機用潤滑油。4. The swelling ratio of acrylonitrile-butadiene rubber to the base oil at 120 ° C. for 120 hours
Lubricating oil for a CFC compressor for car air conditioners according to any one of claims 1 to 3, which is 3.9% or less.
であることを特徴とする、請求項１〜４のいずれか一つ
の請求項に記載のカーエアコン用フロン圧縮機用潤滑
油。5. The viscosity of the base oil at 100 ° C. is 4 to 15 cSt.
The lubricating oil for a Freon compressor for a car air conditioner according to any one of claims 1 to 4, wherein
53℃以上であることを特徴とする、請求項１〜５のいず
れか一つの請求項に記載のカーエアコン用フロン圧縮機
用潤滑油。6. The two-layer separation temperature of the base oil at the time of heating is
The lubricating oil for a CFC compressor for a car air conditioner according to any one of claims 1 to 5, which has a temperature of 53 ° C or higher.
−70℃以下であることを特徴とする、請求項６記載のカ
ーエアコン用フロン圧縮機用潤滑油。7. The lubricating oil for a Freon compressor for a car air conditioner according to claim 6, wherein a two-layer separation temperature of the base oil when the temperature is lowered is −70 ° C. or lower.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63085346A JP2556547B2 (en) | 1988-04-08 | 1988-04-08 | Lubricating oil for CFC compressors for car air conditioners |
| US07/944,342 US5543068A (en) | 1988-04-08 | 1992-09-14 | Lubricating oils for flon compressors, compositions adapted for flon compressors and composed of mixtures of said lubricating oils and flon, and process for lubricating flon compressor by using said lubricating oils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63085346A JP2556547B2 (en) | 1988-04-08 | 1988-04-08 | Lubricating oil for CFC compressors for car air conditioners |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259093A JPH01259093A (en) | 1989-10-16 |
| JP2556547B2 true JP2556547B2 (en) | 1996-11-20 |
Family
ID=13856108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63085346A Expired - Lifetime JP2556547B2 (en) | 1988-04-08 | 1988-04-08 | Lubricating oil for CFC compressors for car air conditioners |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556547B2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5543068A (en) * | 1988-04-08 | 1996-08-06 | Japan Energy Corporation | Lubricating oils for flon compressors, compositions adapted for flon compressors and composed of mixtures of said lubricating oils and flon, and process for lubricating flon compressor by using said lubricating oils |
| US4916914A (en) * | 1988-05-27 | 1990-04-17 | Cpi Engineering Services, Inc. | Rotary displacement compression heat transfer systems incorporating highly fluorinated refrigerant-synthetic oil lubricant compositions |
| WO1990005172A1 (en) * | 1988-11-11 | 1990-05-17 | Asahi Glass Company Ltd. | Tetrafluoroethane composition for a regrigerator |
| JP2761021B2 (en) * | 1989-03-07 | 1998-06-04 | 出光興産株式会社 | Lubricating oil for compression refrigerator and method for producing the same |
| EP0452509B9 (en) * | 1989-11-13 | 2002-05-08 | Idemitsu Kosan Company Limited | Use of synthetic lubricating oil based on polyester as lubricant in refrigerators |
| JP2967574B2 (en) | 1990-11-16 | 1999-10-25 | 株式会社日立製作所 | Refrigeration equipment |
| DE69221553T2 (en) * | 1991-07-01 | 1997-12-11 | Kao Corp | Working fluid composition for use in refrigeration systems |
| JP3200127B2 (en) | 1991-12-18 | 2001-08-20 | 旭電化工業株式会社 | Lubricants for refrigerators |
| JPH06100881A (en) * | 1992-09-18 | 1994-04-12 | Kyoseki Seihin Gijutsu Kenkyusho:Kk | Refrigerator oil composition |
| ES2214487T5 (en) | 1994-07-19 | 2009-06-15 | Nippon Mitsubishi Oil Corporation | COMPOSITION OF A REFRIGERANT OIL AND LIQUID COMPOSITION FOR REFRIGERATOR. |
| CA2155166C (en) | 1994-08-03 | 2005-04-26 | Katsuya Takigawa | Refrigerator oil composition and fluid composition for refrigerator |
| US5746933A (en) | 1994-11-07 | 1998-05-05 | Nippon Oil Co., Ltd. | Lubricating oil and composition for refrigerating machine, and refrigerating machine |
| US5711895A (en) | 1994-12-12 | 1998-01-27 | Nippon Oil Co., Ltd. | Fluid composition for use in a refrigerating machine in which the refrigerating machine oil is at least one hydrocarbon compound of a formula consisting of two phenyl groups joined through an alkylene or alkenylene group |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3607755A (en) * | 1968-11-25 | 1971-09-21 | Allied Chem | Novel halocarbon compositions |
| JPS55161895A (en) * | 1979-06-04 | 1980-12-16 | Hitachi Ltd | Refrigerator oil composition |
| JPS5763395A (en) * | 1980-10-03 | 1982-04-16 | Nippon Oil & Fats Co Ltd | Polyether refrigerator oil composition |
| JP2514090B2 (en) * | 1988-04-06 | 1996-07-10 | 日本石油株式会社 | Lubricating oil composition for freezers |
-
1988
- 1988-04-08 JP JP63085346A patent/JP2556547B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01259093A (en) | 1989-10-16 |
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