JP2000145640A - Equipment using refrigerant - Google Patents

Equipment using refrigerant

Info

Publication number
JP2000145640A
JP2000145640A JP29507699A JP29507699A JP2000145640A JP 2000145640 A JP2000145640 A JP 2000145640A JP 29507699 A JP29507699 A JP 29507699A JP 29507699 A JP29507699 A JP 29507699A JP 2000145640 A JP2000145640 A JP 2000145640A
Authority
JP
Japan
Prior art keywords
refrigerant
refrigerating machine
machine oil
hfc
hermetic 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.)
Pending
Application number
JP29507699A
Other languages
Japanese (ja)
Inventor
Kenji Takaichi
健二 高市
Hiroto Nakama
啓人 中間
Toshikazu Sakai
寿和 境
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP29507699A priority Critical patent/JP2000145640A/en
Publication of JP2000145640A publication Critical patent/JP2000145640A/en
Pending legal-status Critical Current

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  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Lubricants (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent leak current caused by electric insulation of refrigerating machine oil by storing a machine part and a motor part in a closed casing of a hermetic compressor, by sealing HFC refrigerant and ester refrigerating machine oil in the closed casing, and by arranging a means for solving the two-layer separation. SOLUTION: A heater 14 is installed in a hermetic compressor, a controller 15 for energizing the heater 14 is arranged, and an insulation resistance sensor 16 is attached to the bottom of a feed pipe 8 of the compressor. An ester refrigerating machine oil layer 12 of a volume resistivity value 1013 Ω cm or more forms a two-layer separated state from a HFC-134a layer 17. The shaft 2 rotates by a rotary force of the motor part 10, moves the piston 5, and compresses the refrigerant in the compressor 7. The compression heat and the heat generation of the motor part 10 raise the temperature of the hermetic compressor. The compressed refrigerant cools in the cooling system and returns to the compressor again. The refrigerant HFC-134a and the ester refrigerating machine oil are fed to a machine part through the oil feeder 8.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、HFC系冷媒を使
用することによって地球の温暖化等の環境問題を起こさ
ない冷媒を使用する機器の技術に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology of an apparatus using a refrigerant which does not cause environmental problems such as global warming by 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
に本発明の冷媒を使用する機器は、密閉型圧縮機の密閉
ケーシング内に機械部と前記機械部を駆動させるモータ
ー部を収納するとともに、前記密閉ケーシングにHFC
系冷媒と、エステル系冷凍機油を封入してなり、二層分
離を解消するための手段を備えたものである。
According to the present invention, there is provided an apparatus using a refrigerant according to the present invention, wherein a machine section and a motor section for driving the machine section are housed in a closed casing of a hermetic compressor. HFC in the closed casing
A system refrigerant and an ester-based refrigerating machine oil are enclosed, and a means for eliminating two-layer separation is provided.

【0015】これによりHFC系冷媒と相互溶解性のあ
るエステル系冷凍機油であるため、電気がモータ部から
冷凍機油、又は冷凍機油と冷媒の混合液を通して密閉ケ
ーシングへ流れることがなくなる。又、二層分離が自動
的に解消されるので絶縁性能が維持され、したがって漏
電の恐れがなくなることになる。
[0015] Since this is an ester refrigerating machine oil having mutual solubility with the HFC-based refrigerant, electricity does not flow from the motor to the closed casing through the refrigerating machine oil or the mixed liquid of the refrigerating machine oil and the refrigerant. In addition, since the two-layer separation is automatically canceled, the insulation performance is maintained, and therefore, there is no risk of electric leakage.

【0016】[0016]

【発明の実施の形態】以下、本発明の一実施例の冷媒を
使用する機器について冷媒を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。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one refrigerant for equipment using refrigerants embodiment HFC-134a, high refrigerating machine oil having critical solution temperature, volume resistivity of 10 13 [Omega] cm or more ester refrigerating machine oil of the present invention 1 will be described with reference to FIG. 1, but the same components as those in the conventional example will be denoted by the same reference numerals and description thereof will be 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】本発明の冷媒を使用する機器における密
閉型圧縮機は、密閉ケーシング内に機械部と前記機械部
を駆動させるモーター部を収納するとともに、前記密閉
ケーシングにHFC系冷媒と、エステル系冷凍機油を封
入し、二層分離を解消するようにしたものであるから、
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、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ようにしたものであ
る。
The hermetic compressor in the equipment using the refrigerant of the present invention contains a mechanical section and a motor section for driving the mechanical section in a closed casing, and has an HFC-based refrigerant and an ester in the closed casing. Since the system refrigerator oil is enclosed to eliminate two-layer separation,
In addition to the high electrical insulation properties of the ester oil itself, electric leakage and electric shock can be effectively prevented, and the well-known enameled wires and insulation are used regardless of the type of refrigerant used for the windings of the motor and the insulation film. The film can be used as it is.

【図面の簡単な説明】[Brief description of the drawings]

【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.

【符号の説明】[Explanation of symbols]

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) F04B 49/10 331 F04B 49/10 331Z F25B 1/00 321 F25B 1/00 321J // C10N 40:30 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F04B 49/10 331 F04B 49/10 331Z F25B 1/00 321 F25B 1/00 321J // C10N 40:30

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 冷媒を使用する機器であって、前記機器
の冷却サイクル中には冷媒を圧縮する密閉型圧縮機を含
んでおり、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
ーシング内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、前記機械部に冷凍機油を搬送する給油
装置と、前記密閉ケーシングに密着したヒーターと、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媒を
使用する機器。
1. An apparatus using a refrigerant, the apparatus comprising a hermetic compressor for compressing the refrigerant during a cooling cycle of the apparatus, wherein the hermetic compressor comprises an HFC refrigerant and an ester refrigerant oil. A sealed casing enclosing the same, a mechanical unit housed in the sealed casing, a motor unit for driving the mechanical unit, an oil supply device that conveys refrigerating machine oil to the mechanical unit, and a heater closely attached to the sealed casing, An apparatus using a refrigerant, comprising: a sensor installed below a refueling unit of the refueling device to detect two-layer separation.
【請求項2】 センサーが冷媒と冷凍機油の電気抵抗を
検知する絶縁抵抗センサーであることを特徴とする請求
項1記載の冷媒を使用する機器。
2. The apparatus using a refrigerant 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.
【請求項3】 センサーが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であることを特徴と
する請求項1記載の冷媒を使用する機器。
3. An apparatus using a refrigerant according to claim 1, wherein the sensor is an infrared concentration sensor for detecting the infrared transmittance of the refrigerant and the refrigerating machine oil.
【請求項4】 センサーが冷媒と冷凍機油の粘度を検知
する粘度センサーであることを特徴とする請求項1記載
の冷媒を使用する機器。
4. An apparatus using a refrigerant according to claim 1, wherein the sensor is a viscosity sensor for detecting the viscosity of the refrigerant and the refrigerating machine oil.
【請求項5】 冷媒を使用する機器であって、前記機器
の冷却サイクル中には冷媒を圧縮する密閉型圧縮機を含
んでおり、前記密閉型圧縮機は、密閉ケーシング内に機
械部と前記機械部を駆動させるモーター部を収納すると
ともに、前記密閉ケーシング内には冷媒HFC−134
aと、体積抵抗値が1013Ωcm以上のエステル系冷凍
機油を封入していて前記冷却サイクルには前記冷媒HF
C−134aを循環させることを特徴とする冷媒を使用
する機器。
5. An apparatus using a refrigerant, the apparatus including a hermetic compressor for compressing the refrigerant during a cooling cycle of the apparatus, wherein the hermetic compressor includes a mechanical part and a A motor unit for driving a mechanical unit is housed, and a refrigerant HFC-134 is provided in the closed casing.
a, and an ester-based refrigerating machine oil having a volume resistance value of 10 13 Ωcm or more.
An apparatus using a refrigerant characterized by circulating C-134a.
【請求項6】 モーター部の巻線は金属線に絶縁被覆を
施していて、CFC系冷媒またはHCFC系冷媒を使用
する密閉型圧縮機の巻線のなかから選ばれるエナメル線
としたとを特徴とする請求項1または請求項5記載の冷
媒を使用する機器。
6. The motor winding is formed by applying an insulating coating to a metal wire and using an enamel wire selected from windings of a hermetic compressor using a CFC-based refrigerant or an HCFC-based refrigerant. An apparatus using the refrigerant according to claim 1 or 5.
【請求項7】 モーター部の絶縁フィルムは、CFC系
冷媒またはHCFC系冷媒をに絶縁被覆を施していて、
CFC系冷媒またはHCFC系冷媒を使用する密閉型圧
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
したとを特徴とする請求項1または請求項5または請求
項6のいずれか1項に記載の冷媒を用いた機器。
7. The insulating film of the motor section is formed by applying an insulating coating to a CFC-based refrigerant or an HCFC-based refrigerant.
The insulating film selected from among insulating films of a hermetic compressor using a CFC-based refrigerant or an HCFC-based refrigerant, wherein the insulating film is selected from the group consisting of: Equipment using refrigerant.
JP29507699A 1999-01-01 1999-10-18 Equipment using refrigerant Pending JP2000145640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29507699A JP2000145640A (en) 1999-01-01 1999-10-18 Equipment using refrigerant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29507699A JP2000145640A (en) 1999-01-01 1999-10-18 Equipment using refrigerant

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
JP2000145640A true JP2000145640A (en) 2000-05-26

Family

ID=17816017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29507699A Pending JP2000145640A (en) 1999-01-01 1999-10-18 Equipment using refrigerant

Country Status (1)

Country Link
JP (1) JP2000145640A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013190665A1 (en) 2012-06-20 2013-12-27 三菱電機株式会社 Heat pump device, air conditioner, and refrigerating machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013190665A1 (en) 2012-06-20 2013-12-27 三菱電機株式会社 Heat pump device, air conditioner, and refrigerating machine
US9903629B2 (en) 2012-06-20 2018-02-27 Mitsubishi Electric Corporation Heat pump device, air conditioner, and freezer

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