JP2000120542A - Refrigeration system - Google Patents
Refrigeration systemInfo
- Publication number
- JP2000120542A JP2000120542A JP29507599A JP29507599A JP2000120542A JP 2000120542 A JP2000120542 A JP 2000120542A JP 29507599 A JP29507599 A JP 29507599A JP 29507599 A JP29507599 A JP 29507599A JP 2000120542 A JP2000120542 A JP 2000120542A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- oil
- sensor
- hfc
- refrigerating machine
- 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.)
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Links
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- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＨＦＣ系冷媒を使
用する密閉型圧縮機を備えた冷蔵庫等の冷凍装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus such as a refrigerator having a hermetic compressor using an HFC-based refrigerant.
【０００２】[0002]
【従来の技術】近年、クロロフルオロカーボン（以下Ｃ
ＦＣと称する）の影響によるオゾン層破壊及び地球の温
暖化等の環境問題が注目されている。このような観点よ
り、冷媒であるＣＦＣの使用量削減が、極めて重要なテ
ーマとなってきている。従来、ＣＦＣとして使用されて
来た完全ハロゲン化炭素化合物は、少なくとも水素を１
個以上含むハロゲン化炭素化合物に代替化が図られつつ
ある。2. Description of the Related Art In recent years, chlorofluorocarbon (hereinafter referred to as C)
Attention has been focused on environmental problems such as ozone layer depletion and global warming caused by the influence of FC. From this point of view, reducing the amount of CFC used as a refrigerant has become a very important theme. Conventionally, fully halogenated carbon compounds that have been used as CFCs contain at least one hydrogen.
Substitution is being attempted with halogenated carbon compounds containing more than one.
【０００３】さらに具体的には、代表的な冷媒であるジ
クロロジフルオロメタン（以下ＣＦＣ−１２と称する）
は、ＣＦＣの代替物質であり、オゾン破壊に対する影響
の少ない１，１，１，２−テトラフルオロエタン（以下
ＨＦＣ−１３４ａと称する）等へ代替化を図るため種々
の改善取組みがなされている。More specifically, dichlorodifluoromethane (hereinafter referred to as CFC-12) which is a typical refrigerant
Is an alternative substance to CFC, and various improvements have been made to replace it with 1,1,1,2-tetrafluoroethane (hereinafter referred to as HFC-134a) or the like which has little effect on ozone depletion.
【０００４】例えば、１９７８年１０月発行のＤｕＰｏ
ｎｔ社のＲｅｓｅａｒｃｈ Ｄｉｓｃｌｏｓｕｒｅの記
載によれば、ＨＦＣ−１３４ａは従来のどのような油と
も相溶性が悪くて全ての温度域で二層分離を生じ、唯一
グリコール系油にのみ溶解する。しかし、その後の研究
により特殊なエステル系油にも溶解することが判ってき
た。例えば、米国特許第４８５１１４４号においてエス
テル系とグリコール系の混合した冷凍機油が冷媒ＨＦＣ
−１３４ａに溶解することが示されている。[0004] For example, DuPo issued in October 1978
According to Research Disclosure of nt, HFC-134a is poorly compatible with any conventional oils, causes two-phase separation in all temperature ranges, and is only soluble in glycol-based oils only. However, subsequent studies have shown that it can also be dissolved in special ester-based oils. For example, in U.S. Pat. No. 4,851,144, a refrigerating machine oil in which an ester type and a glycol type are mixed is used as a refrigerant HFC.
-134a.
【０００５】しかし、多くのエステル系冷凍機油は、冷
媒ＨＦＣ−１３４ａと溶解しにくく二層分離を生じ、臨
界溶解温度は高かった。しかし、これらのエステル系冷
凍機油は、臨界溶解温度が低い特殊なエステル系冷凍機
油に比べ、信頼性，潤滑性が高い。However, many ester refrigerating machine oils are hardly soluble in the refrigerant HFC-134a and cause two-layer separation, and the critical melting temperature is high. However, these ester refrigerating machine oils have higher reliability and lubricity than special ester refrigerating machine oils having a low critical solution temperature.
【０００６】冷媒と冷凍機油が二層分離が生じた場合に
は、冷凍機油は比重が軽いため冷媒の上側に位置する様
になる。反対に冷媒は下側に位置する。When the refrigerant and the refrigerating machine oil are separated into two layers, the refrigerating machine oil is located above the refrigerant because of its low specific gravity. Conversely, the refrigerant is located on the lower side.
【０００７】又冷媒ＨＦＣ−１３４ａは水素原子を多数
含むので本質的に電気を流しやすく、密閉型圧縮機に要
求される電気絶縁性が非常に悪い事も判明している。[0007] It has also been found that the refrigerant HFC-134a contains a large number of hydrogen atoms, so that it is essentially easy to conduct electricity, and the electrical insulation required for the hermetic compressor is very poor.
【０００８】図２は、従来の密閉型圧縮機の断面図であ
る。図２において１は機械部であり、シャフト２，副軸
受３，軸受４，ピストン５，シリンダー６からなる。前
記シャフト２，副軸受３，軸受４，ピストン５，シリン
ダー６は圧縮室７を形成している。８は給油管であり、
冷媒ＨＦＣ−１３４ａとエステル系冷凍機油の混合油を
摺動面に供給する。１０はモーター部である。また１１
は前記の機械部１やモーター部１０を収納する金属性の
密閉ケーシングである。FIG. 2 is a sectional view of a conventional hermetic compressor. In FIG. 2, reference numeral 1 denotes a mechanical unit, which comprises a shaft 2, a sub bearing 3, a bearing 4, a piston 5, and a cylinder 6. The shaft 2, the sub bearing 3, the bearing 4, the piston 5 and the cylinder 6 form a compression chamber 7. 8 is an oil supply pipe,
A mixture of refrigerant HFC-134a and ester-based refrigerating machine oil is supplied to the sliding surface. Reference numeral 10 denotes a motor unit. Also 11
Is a metallic closed casing that houses the mechanical unit 1 and the motor unit 10 described above.
【０００９】[0009]
【発明が解決しようとする課題】以上のように構成され
た密閉型圧縮機において、シャフト２は、モーター部１
０の回転力によって回転し、ピストン５を動かし、副軸
受３，軸受４及びシリンダー６によって形成された圧縮
室７内の冷媒を圧縮する。圧縮された冷媒は冷凍システ
ムで冷却を行ない再び圧縮機に戻ってくる。In the hermetic compressor constructed as described above, the shaft 2 is connected to the motor 1
The piston 5 is rotated by the rotational force of 0 to move the piston 5 and compress the refrigerant in the compression chamber 7 formed by the sub-bearing 3, the bearing 4 and the cylinder 6. The compressed refrigerant is cooled in the refrigeration system and returns to the compressor again.
【００１０】また、図に示したような小型の圧縮機は、
近年省スペース化を目的として横型、すなわち、機械部
１と前記機械部を駆動させるモーター部１０が水平に設
置される事が多くなっている。すなわち冷媒ＨＦＣ−１
３４ａと冷凍機油の混合油に浸漬される構造となってい
る。そこで、電気絶縁性の劣るＨＦＣ−１３４ａをこの
圧縮機にそのまま使用するとエステル系冷凍機油と冷媒
ＨＦＣ−１３４ａとが二層分離を生じる。つまり油は比
重が軽いため上側に油層１２を形成し、反対に冷媒は下
側に冷媒層１３を形成する。冷媒ＨＦＣ−１３４ａは水
素原子を多数含むので本質的に電気を流しやすく、この
ためわずかではあるがモーター部１０から冷媒層１３を
通して電気を密閉ケーシング１１に流す。そのため漏電
や感電の危険性が生じる可能性があった。A small compressor as shown in FIG.
In recent years, the horizontal type, that is, the mechanical unit 1 and the motor unit 10 for driving the mechanical unit are often installed horizontally for the purpose of saving space. That is, the refrigerant HFC-1
34a and a structure immersed in a mixed oil of refrigerating machine oil. Therefore, when HFC-134a having poor electrical insulation is used as it is in this compressor, ester-based refrigerating machine oil and refrigerant HFC-134a are separated into two layers. That is, since the oil has a low specific gravity, the oil forms the oil layer 12 on the upper side, and the refrigerant forms the refrigerant layer 13 on the lower side. Since the refrigerant HFC-134a contains a large number of hydrogen atoms, it is inherently easy to conduct electricity, and thus, although slightly, electricity is passed from the motor unit 10 to the closed casing 11 through the coolant layer 13. For this reason, there is a possibility that a risk of electric leakage or electric shock may occur.
【００１１】また、なんらかの手段・方法により二層分
離状態が解消された場合、つまり液状冷媒層１３が解消
された場合でも、冷凍機油自体の電気絶縁性が低い場合
は、油層１２を通して密閉ケーシング１１に電気が流れ
る可能性がある。When the two-layer separation state is eliminated by some means or method, that is, when the liquid refrigerant layer 13 is eliminated, but the electrical insulation of the refrigerating machine oil itself is low, the closed casing 11 is passed through the oil layer 12. Electricity may flow through
【００１２】さらに、油層１２中に冷媒ＨＦＣ１３４ａ
が混り合った状態にあるときも同様である。Further, the refrigerant HFC134a
The same is true when are mixed.
【００１３】従って、本発明は冷凍機油の電気絶縁性に
起因する漏電の発生防止を目的とするものである。Accordingly, an object of the present invention is to prevent the occurrence of electric leakage due to the electrical insulation of refrigeration oil.
【００１４】[0014]
【課題を解決するための手段】上記課題を解決するため
に本発明の冷凍装置は、物品収納部と、前記物品収納部
を冷却する冷凍サイクルと、前記冷凍サイクルを構成す
る密閉型圧縮機とを備え、前記密閉型圧縮機はＨＦＣ系
冷媒とエステル系冷凍機油を封入した密閉ケーシング
と、前記密閉ケーシングに収納された機械部と前記機械
部を駆動させるモーター部と、前記機械部に前記冷凍機
油を搬送する給油装置と、前記密閉型圧縮機を加熱する
ヒーターと、前記給油装置の給油部の下方に設置された
二層分離を検知するセンサーとを具備している。According to the present invention, there is provided a refrigeration apparatus comprising: an article storage section; a refrigeration cycle for cooling the article storage section; and a hermetic compressor constituting the refrigeration cycle. The hermetic compressor includes a hermetic casing in which an HFC-based refrigerant and an ester-based refrigerating machine oil are sealed, a mechanical section housed in the hermetic casing, a motor section for driving the mechanical section, and the refrigeration section in the mechanical section. An oil supply device for transporting machine oil, a heater for heating the hermetic compressor, and a sensor installed below the oil supply unit of the oil supply device for detecting two-layer separation are provided.
【００１５】これにより自動的に二層分離を解消して冷
凍装置の漏電を防止することができる。As a result, the two-layer separation is automatically eliminated, and the leakage of the refrigeration system can be prevented.
【００１６】[0016]
【発明の実施の形態】以下、本発明の一実施例の冷凍装
置について冷媒をＨＦＣ−１３４ａ，冷凍機油を臨界溶
解温度の高い、体積抵抗値が１０13Ωｃｍ以上のエステ
ル系冷凍機油として、図１を参照しながら説明するが、
従来例と同じものは、同一番号を付して説明を省略す
る。BEST MODE FOR CARRYING OUT THE INVENTION A refrigeration apparatus according to one embodiment of the present invention is described below, in which the refrigerant is HFC-134a, and the refrigeration oil is an ester-based refrigeration oil having a high critical solution temperature and a volume resistivity of 10 13 Ωcm or more. This will be described with reference to FIG.
The same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.
【００１７】本発明の実施例について図１を参照しなが
ら説明する。１４は密閉型圧縮機に設置されたヒータ
ー、１５はヒーター１４の通電用制御装置である。An embodiment of the present invention will be described with reference to FIG. 14 is a heater installed in the hermetic compressor, and 15 is a control device for energizing the heater 14.
【００１８】また、１６は圧縮機の給油管８の下方に取
り付けられた絶縁抵抗センサーである。尚、本願の原出
願の原出願である平成２年特許願第３０９８７４号（特
開平４−１７９８７６号）に添付した明細書に示されて
いるごとく、絶縁抵抗センサー１６は、冷媒と冷凍機油
の赤外線の透過度を検知する赤外線濃度センサーまた
は、冷媒と冷凍機油の粘度を検知する粘度センサーと置
き換えることができる。Reference numeral 16 denotes an insulation resistance sensor mounted below the oil supply pipe 8 of the compressor. As shown in the specification attached to Japanese Patent Application No. 309874 (Japanese Patent Application Laid-Open No. Hei 4-179876), which is the original application of the original application of the present application, the insulation resistance sensor 16 uses a refrigerant and a refrigerating machine oil. It can be replaced with an infrared concentration sensor that detects the transmittance of infrared light or a viscosity sensor that detects the viscosity of the refrigerant and the refrigerating machine oil.
【００１９】１２は体積抵抗値が１０13Ωｃｍ以上のエ
ステル系冷凍機油の層でＨＦＣ−１３４ａの層１７と二
層分離状態となっている。Reference numeral 12 denotes a layer of an ester refrigerating machine oil having a volume resistance of 10 13 Ωcm or more, which is separated from the layer 17 of HFC-134a by two layers.
【００２０】以上のように構成された密閉型圧縮機につ
いてその動作を説明する。シャフト２は、モーター部１
０の回転力によって回転し、ピストン５を動かし、副軸
受３，軸受４，及びシリンダー６によって形成された圧
縮室７内の冷媒を圧縮する。この時の圧縮熱とモーター
部１０の発熱により密閉型圧縮機の温度が上昇する。一
方、圧縮された冷媒は冷凍システムで冷却を行ない再び
圧縮機に戻ってくる。この時、冷媒ＨＦＣ−１３４ａと
エステル系冷凍機油が潤滑のため給油装置８を通じて機
械部に供給される。The operation of the hermetic compressor constructed as described above will be described. The shaft 2 is a motor unit 1
By rotating the piston 5 with a rotational force of 0, the piston 5 is moved to compress the refrigerant in the compression chamber 7 formed by the sub-bearings 3, the bearings 4, and the cylinder 6. The temperature of the hermetic compressor increases due to the compression heat and the heat generated by the motor unit 10 at this time. On the other hand, the compressed refrigerant is cooled by the refrigeration system and returns to the compressor again. At this time, the refrigerant HFC-134a and the ester-based refrigerating machine oil are supplied to the machine unit through the oil supply device 8 for lubrication.
【００２１】上記動作のくり返しにより、圧縮機は冷媒
圧縮時の発熱やモーター部１０の発熱等によって圧縮機
が高温になるとエステル系冷凍機油と冷媒ＨＦＣ−１３
４ａとが徐々に溶解を始め最終的にはエステル系冷凍機
油と冷媒ＨＦＣ−１３４ａは溶解し二層分離が解消され
る。しかし、圧縮機が停止した時に圧縮機内の温度圧力
が下がることにより、冷媒層１７が徐々に析出する。When the compressor is heated to a high temperature due to the heat generated during the compression of the refrigerant and the heat generated by the motor unit 10 due to the above operation, the ester-based refrigerating machine oil and the refrigerant HFC-13 are discharged.
4a gradually begins to dissolve, and finally the ester-based refrigerating machine oil and the refrigerant HFC-134a dissolve and the two-layer separation is eliminated. However, when the temperature and pressure inside the compressor decrease when the compressor stops, the refrigerant layer 17 is gradually deposited.
【００２２】次に冷凍機油中に冷媒ＨＦＣ−１３４ａが
溶解した場合について説明する。絶縁性を示す指標の一
つである体積抵抗値を、各々の物質について示す。Next, the case where the refrigerant HFC-134a is dissolved in the refrigerating machine oil will be described. The volume resistance value, which is one of the indices indicating the insulating properties, is shown for each substance.
【００２３】 ＨＦＣ １３４ａ １０9Ωｃｍ グリコール系冷凍機油 １０10Ωｃｍ ＣＦＣ−１２ １０15Ωｃｍ 従来冷凍機油 １０14Ωｃｍ エステル系冷凍機油 １０13Ωｃｍ （当社内測定結果による） つまり電気絶縁性は、体積抵抗の値が大きい方が絶縁性
が高い。冷凍機油中にＨＦＣ−１３４ａが多く溶解した
場合には電気絶縁性は急激に低下するために冷凍機油中
の溶解量を少なくすること又油面を下げることが望まし
い。HFC 134a 10 9 Ωcm glycol-based refrigerating machine oil 10 10 Ωcm CFC-12 10 15 Ωcm Conventional refrigerating machine oil 10 14 Ωcm Ester-based refrigerating machine oil 10 13 Ωcm (measured by our company) The larger the value, the higher the insulation. When a large amount of HFC-134a is dissolved in the refrigerating machine oil, the electrical insulation property is rapidly lowered.
【００２４】本発明は、絶縁抵抗センサー１６は、冷凍
機油中にとけている冷媒の量により、絶縁抵抗が変化す
ることを利用し冷凍機油と冷媒ＨＦＣ−１３４ａの二層
分離を解消するとともに、冷凍機油中への冷媒ＨＦＣ−
１３４ａの溶解量を少なくするものである。すなわち、
密閉型圧縮機のモーター停止時において、絶縁抵抗セン
サー１６にて、絶縁抵抗センサー１６と密閉型圧縮機の
間との絶縁抵抗を測定し、絶縁抵抗が所定値以下になっ
た時に、ヒーター通電用制御装置１５によりヒーター１
４に通電を行ない冷凍機油を加熱する。According to the present invention, the insulation resistance sensor 16 eliminates the two-layer separation between the refrigerant oil and the refrigerant HFC-134a by utilizing the fact that the insulation resistance changes depending on the amount of the refrigerant dissolved in the refrigerant oil. Refrigerant HFC- in refrigerant oil
The purpose is to reduce the amount of 134a dissolved. That is,
When the motor of the hermetic compressor is stopped, the insulation resistance between the insulation resistance sensor 16 and the hermetic compressor is measured by the insulation resistance sensor 16, and when the insulation resistance falls below a predetermined value, the heater is turned on. Heater 1 by controller 15
4 is energized to heat the refrigerator oil.
【００２５】つまり、ヒーター１４及び通電用制御装置
１５にて密閉型圧縮機の絶縁抵抗が所定値以下になった
時に密閉型圧縮機を加熱することにより、冷凍機油と冷
媒ＨＦＣ−１３４ａを加熱し、温度を上げることによ
り、冷凍機油と冷媒ＨＦＣ−１３４ａの二層分離をなく
し圧縮機起動時の冷媒潤滑を解消すると共に、冷凍機油
中の冷媒ＨＦＣ−１３４ａの溶解量が少なくなり又油面
が低下することにより電気絶縁性が向上しケーシング中
に電流が流れず漏電や感電の危険性が生じなくなる。That is, when the insulation resistance of the hermetic compressor is reduced to a predetermined value or less by the heater 14 and the control device 15 for energization, the hermetic compressor is heated to heat the refrigerating machine oil and the refrigerant HFC-134a. By raising the temperature, the refrigerant oil and refrigerant HFC-134a are not separated into two layers, eliminating the lubrication of the refrigerant at the time of starting the compressor, and the amount of refrigerant HFC-134a dissolved in the refrigerant oil is reduced and the oil level is reduced. By lowering, the electric insulation is improved, and no current flows in the casing, so that there is no danger of electric leakage or electric shock.
【００２６】又ヒーター１４を絶縁抵抗センサー１６に
よりＯＮ−ＯＦＦすることにより消費電力量は少なくで
きる。The power consumption can be reduced by turning the heater 14 on and off by the insulation resistance sensor 16.
【００２７】以上述べた如く、本実施例によれば、冷凍
機油中の冷媒ＨＦＣ−１３４ａの溶解量が少なくなり、
電気絶縁性が向上するとともに、冷凍機油自体が、体積
抵抗値の大きいエステル油を用いるため、漏電や感電を
より効果的に防止できるものである。As described above, according to this embodiment, the amount of the refrigerant HFC-134a dissolved in the refrigerating machine oil is reduced,
The electrical insulation is improved, and the refrigerating machine oil itself uses an ester oil having a large volume resistance value, so that it is possible to more effectively prevent electric leakage and electric shock.
【００２８】なお、上記の実施の形態における説明で
は、ＨＦＣ系冷媒としてＨＦＣ−１３４ａを例にとって
説明したが、少なくとも水素を１個以上含むフッ化炭素
化合物であればよい。In the above embodiment, HFC-134a has been described as an example of the HFC-based refrigerant. However, a fluorocarbon compound containing at least one hydrogen may be used.
【００２９】[0029]
【発明の効果】本発明の冷凍装置は、物品収納部と、前
記物品収納部を冷却する冷凍サイクルと、前記冷凍サイ
クルを構成する密閉型圧縮機とを備え、前記密閉型圧縮
機はＨＦＣ系冷媒とエステル系冷凍機油を封入した密閉
ケーシングと、前記密閉ケーシングに収納された機械部
と前記機械部を駆動させるモーター部と、前記機械部に
前記冷凍機油を搬送する給油装置と、前記密閉型圧縮機
を加熱するヒーターと、前記給油装置の給油部の下方に
設置された二層分離を検知するセンサーとを具備してい
るものであるから、エステル油自体の高電気絶縁性と相
まって漏電や感電を効果的に防止することができるとと
もに、自動的に二層分離を解消して漏電を起こりにくく
しているので、モーター部の巻線ならびに絶縁フィルム
には使用する冷媒の種類に関係なく従来より周知のエナ
メル線ならびに絶縁フィルムをそのまま使用することが
できる。The refrigerating apparatus of the present invention comprises an article storage section, a refrigeration cycle for cooling the article storage section, and a hermetic compressor constituting the refrigeration cycle, wherein the hermetic compressor is an HFC system. A sealed casing in which a refrigerant and an ester-based refrigerating machine oil are sealed, a mechanical unit housed in the closed casing, a motor unit for driving the mechanical unit, an oil supply device for transporting the refrigerating machine oil to the mechanical unit, and the closed mold Since it is equipped with a heater for heating the compressor and a sensor installed below the oil supply section of the oil supply device for detecting the separation of two layers, electric leakage and the like can be achieved in combination with the high electrical insulation of the ester oil itself. It can effectively prevent electric shock and automatically eliminates two-layer separation, making it less likely for electric leakage to occur. Known enameled wire and the insulating film conventionally regardless of type may be used as it is.
【図１】本発明の第１の実施例における冷凍装置に備え
る圧縮機の断面図FIG. 1 is a cross-sectional view of a compressor provided in a refrigeration apparatus according to a first embodiment of the present invention.
【図２】従来の圧縮機の断面図FIG. 2 is a sectional view of a conventional compressor.
１ 機械部 １０ モーター部 １２ エステル系冷凍機油 １４ ヒーター １５ 通電用制御装置 １６ 絶縁抵抗センサー １７ ＨＦＣ系冷媒（ＨＦＣ−１３４ａ） DESCRIPTION OF SYMBOLS 1 Machine part 10 Motor part 12 Ester refrigerating machine oil 14 Heater 15 Control device for energization 16 Insulation resistance sensor 17 HFC-type refrigerant (HFC-134a)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ１０Ｍ 171/00 Ｃ１０Ｍ 171/00 Ｃ１０Ｎ 40:30 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C10M 171/00 C10M 171/00 C10N 40:30
Claims (6)
る冷凍サイクルと、前記冷凍サイクルを構成する密閉型
圧縮機とを備え、前記密閉型圧縮機はＨＦＣ系冷媒とエ
ステル系冷凍機油を封入した密閉ケーシングと、前記密
閉ケーシングに収納された機械部と前記機械部を駆動さ
せるモーター部と、前記機械部に前記冷凍機油を搬送す
る給油装置と、前記密閉型圧縮機を加熱するヒーター
と、前記給油装置の給油部の下方に設置された二層分離
を検知するセンサーとを具備していることを特徴とする
冷凍装置。An article storage section, a refrigeration cycle for cooling the article storage section, and a hermetic compressor composing the refrigeration cycle, wherein the hermetic compressor uses an HFC-based refrigerant and an ester-based refrigeration oil. A sealed casing enclosed, a mechanical unit housed in the closed casing, a motor unit for driving the mechanical unit, an oil supply device for conveying the refrigerating machine oil to the mechanical unit, and a heater for heating the hermetic compressor. A refrigerating device, comprising: a sensor installed below a refueling unit of the refueling device, for detecting two-layer separation.
検知する絶縁抵抗センサーであることを特徴とするとし
た請求項１記載の冷凍装置。2. The refrigerating apparatus according to claim 1, wherein the sensor is an insulation resistance sensor that detects an electric resistance between the refrigerant and the refrigerating machine oil.
過度を検知する赤外線濃度センサーであることを特徴と
するとした請求項１記載の冷凍装置。3. The refrigeration apparatus according to claim 1, wherein the sensor is an infrared concentration sensor for detecting the transmittance of infrared rays of the refrigerant and the refrigerating machine oil.
する粘度センサーであることを特徴とするとした請求項
１記載の冷凍装置。4. The refrigerating apparatus according to claim 1, wherein the sensor is a viscosity sensor for detecting the viscosity of the refrigerant and the refrigerating machine oil.
巻線を備えており、前記巻線がＣＦＣ系冷媒、またはＨ
ＣＦＣ系冷媒を用いる密閉型圧縮機の巻線のなかから選
ばれるエナメル線としたことを特徴とする請求項１記載
の冷凍装置。5. A motor unit comprising a winding in which a metal wire is provided with an insulating coating, wherein said winding is a CFC-based refrigerant or H
2. The refrigerating apparatus according to claim 1, wherein the refrigerating apparatus is an enameled wire selected from windings of a hermetic compressor using a CFC-based refrigerant.
り、前記絶縁フィルムがＣＦＣ系冷媒、またはＨＣＦＣ
系冷媒を用いる密閉型圧縮機の絶縁フィルムのなかから
選ばれる絶縁フィルムとしたことを特徴とする請求項１
または請求項５記載の冷凍装置。6. The motor unit includes an insulating film, wherein the insulating film is a CFC-based refrigerant or an HCFC.
2. An insulating film selected from among insulating films of a hermetic compressor using a system refrigerant.
Or the refrigeration apparatus according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29507599A JP2000120542A (en) | 1999-10-18 | 1999-10-18 | Refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29507599A JP2000120542A (en) | 1999-10-18 | 1999-10-18 | Refrigeration system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29062797A Division JP3019923B2 (en) | 1997-10-23 | 1997-10-23 | Hermetic compressor and refrigerator and freezer equipped with hermetic compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000120542A true JP2000120542A (en) | 2000-04-25 |
Family
ID=17816004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29507599A Pending JP2000120542A (en) | 1999-10-18 | 1999-10-18 | Refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000120542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431843B1 (en) * | 2000-12-15 | 2002-08-13 | Carrier Corporation | Method of ensuring optimum viscosity to compressor bearing system |
-
1999
- 1999-10-18 JP JP29507599A patent/JP2000120542A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431843B1 (en) * | 2000-12-15 | 2002-08-13 | Carrier Corporation | Method of ensuring optimum viscosity to compressor bearing system |
| AU756028B2 (en) * | 2000-12-15 | 2003-01-02 | Carrier Corporation | Method of ensuring optimum viscosity to compressor bearing system |
| EP1217216A3 (en) * | 2000-12-15 | 2004-01-14 | Carrier Corporation | Compressor lubrication control |
| EP1598557A1 (en) * | 2000-12-15 | 2005-11-23 | Carrier Corporation | Compressor lubrication control |
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