JPH0245665A - Twin type compressor - Google Patents
Twin type compressorInfo
- Publication number
- JPH0245665A JPH0245665A JP19542888A JP19542888A JPH0245665A JP H0245665 A JPH0245665 A JP H0245665A JP 19542888 A JP19542888 A JP 19542888A JP 19542888 A JP19542888 A JP 19542888A JP H0245665 A JPH0245665 A JP H0245665A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- suction pipe
- pipe
- oil
- compressors
- 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.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims abstract description 19
- 238000007906 compression Methods 0.000 claims abstract description 19
- 238000005461 lubrication Methods 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、主としてビル等の空ｒＡ装置に好適なツイン
形圧縮装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a twin-type compression device suitable mainly for air-conditioning equipment such as buildings.
（従来の技術）
従来、この種ツイン形の圧縮装置は、例えば実開昭５９
−８１７９１号公報に開示され、かつ、第４図に示すよ
うに、密閉ケーシング（Ｃ）内にモータ（Ｍ）と圧縮要
素（Ｃ，Ｆ）とを組込んだ低圧ドーム式の第１圧縮機（
ＣＰＩ）と第２圧縮機（ＣＦ２）とを備え、これら圧縮
機（ＣＰ１）（ＣＦ２）の各ケーシング（Ｃ）（Ｃ）内
に、それぞれ吸入管（Ｔ）から分岐された第１及び第２
分岐管（Ｔ１）（Ｔ２）を接続すると共に、前記各ケー
シング（Ｃ）（Ｃ）の下部側胴部間を均油管（ＯＴ）に
て相互に連結している。(Prior art) Conventionally, this type of twin-type compression device was developed, for example, by
A first low-pressure dome compressor disclosed in Japanese Patent No. 81791 and incorporating a motor (M) and compression elements (C, F) in a sealed casing (C), as shown in Fig. 4. (
CPI) and a second compressor (CF2), and in each casing (C) (C) of these compressors (CP1) (CF2), first and second compressors branched from the suction pipe (T), respectively.
The branch pipes (T1) and (T2) are connected, and the lower body parts of the respective casings (C) and (C) are interconnected by an oil equalizing pipe (OT).
（発明が解決しようとする課題）
ところで、以上のようなツイン形圧縮装置では、負荷変
動に応じて適性な運転が行えるよう、各々の圧縮機（Ｃ
ＰＩ）（ＣＦ２）の分担能力に差異を設け、トータル能
力をバラエティ−に変更できるようにしているのが通例
である。このため、高能力とされる一方側の圧縮機（例
えばＣＰ１）では圧縮要素（ＣＦ）への吸入量の増加に
よりケーシング（Ｃ）の内部圧力が相対的に低下され、
逆に低能力とされる他方側の圧縮機（ＣＦ２）では圧縮
要素（ＣＦ）への実質的な吸入量の減少によりケーシン
グ（Ｃ）の内部圧力が相対的に高められることになる。(Problem to be Solved by the Invention) By the way, in the above-mentioned twin compressor, each compressor (C
It is customary to differentiate the shared abilities of the PI) (CF2) so that the total ability can be varied. For this reason, in one side of the compressor (for example, CP1), which is considered to have a high capacity, the internal pressure of the casing (C) is relatively reduced due to an increase in the amount of suction into the compression element (CF).
On the other hand, in the other compressor (CF2), which is considered to have a low capacity, the internal pressure of the casing (C) is relatively increased due to a substantial decrease in the suction amount to the compression element (CF).
この結果、２つのケーシング（Ｃ）（Ｃ）内は各々分岐
管（Ｔ１）（Ｔ２）を介して共通の吸入管（Ｔ）に接続
されているにも拘わらず、該各ケーシング（Ｃ）ＣＣ’
）の内部圧力に若干の高低差圧がつくことになる。As a result, although the insides of the two casings (C) and (C) are connected to a common suction pipe (T) via branch pipes (T1) and (T2), each of the casings (C) and CC '
), there will be a slight difference in the internal pressure.
従って、均油管（ＯＴ）は本来の油量アンバランスの是
正手段として適性に機能し得す、該均油管（ＯＴ）を介
して、内部圧力が相対的に高められる低能力側の圧縮機
（ＣＦ２）から、同圧力が低くされる高能力側の圧縮機
（ＣＰＩ）に向けて油の移動が行われることになり、２
つの圧縮機（ＣＰＩ）（ＣＦ２）間に曲面のアンバラン
スが生じることになる。Therefore, the oil equalizing pipe (OT) can function appropriately as a means of correcting the original oil quantity imbalance. The oil will be moved from CF2) to the high capacity compressor (CPI) where the same pressure is lowered.
An unbalance of the curved surface will occur between the two compressors (CPI) (CF2).
こうして、油量の多くなる高能力側の圧縮機（ＣＰＩ）
では過剰給油により油圧縮等の弊害を招くと共に、油量
の少なくなる低能力側の圧縮機（ＣＦ２）では油不足に
より潤滑性能の悪化を招くのであった。In this way, the compressor (CPI) on the high capacity side where the amount of oil increases
In this case, excessive oil supply causes problems such as oil compression, and in the lower capacity compressor (CF2) where the amount of oil decreases, the lubrication performance deteriorates due to oil shortage.
本発明は以上の問題を解消しようとするものであり、吸
入管の構成に工夫を加えることにより、２つの圧縮機の
分担能力の差異に基づく差圧に打ち勝ち、一方の圧縮機
側が必ず高圧に、他方の圧縮機側が必ず低圧になるよう
強制的に差圧を発生せしめ、同時に、高圧となる圧縮機
側に油がより多く戻るようにして、均油管を介しての油
量アンバランスの是正が適性に行われるようにし、２つ
の圧縮機の油面高さを均一化して、良好な潤滑特性を確
保し得るようにしたツイン形圧縮装置を提供することを
目的とするものである。The present invention aims to solve the above problems, and by adding innovation to the configuration of the suction pipe, it is possible to overcome the differential pressure caused by the difference in shared capacity between the two compressors, and ensure that one compressor side is always at high pressure. , forcibly generates a differential pressure so that the pressure on the other compressor side is always low, and at the same time, more oil returns to the compressor side where the pressure is high, correcting the oil quantity imbalance through the oil equalizing pipe. It is an object of the present invention to provide a twin-type compression device in which the oil level of the two compressors can be made uniform to ensure good lubrication characteristics.
（課題を解決するための手段）
そこで、本発明では、密閉ケーシング（Ｃ）に圧縮要素
（ＣＦ）を内装した第１圧縮機（１）と第２圧縮機（２
）とを備え、前記各圧縮機（１）（２）に吸入管（３）
（４）を接続すると共に、前記各圧縮機（１）（２）間
に均油管（６）を設けたツイン形圧縮装置において、前
記第２圧縮機（２）に接続する第２吸入管（４）を、第
１圧縮機（１）に接続する第１吸入管（３）の途中に接
続して、前記第２吸入管（４）の接続端部を前記第１吸
入管（３）の管内壁（３ａ）より内方に突出させること
とした。(Means for Solving the Problems) Therefore, in the present invention, a first compressor (1) and a second compressor (2) each including a compression element (CF) inside a hermetic casing (C)
), and a suction pipe (3) is provided to each of the compressors (1) and (2).
(4) and an oil equalizing pipe (6) between each of the compressors (1) and (2), in which a second suction pipe ( 4) in the middle of the first suction pipe (3) that connects to the first compressor (1), and connect the connecting end of the second suction pipe (4) to the first suction pipe (3). It was decided to make it protrude inward from the tube inner wall (3a).
（作用）
第１吸入管（３）の途中部位に第２吸入管（４）が接続
され、この第２吸入管（４）の接続端部が第１吸入管（
３）の管内壁（３ａ）よりも内方に突出されていること
から、第２吸入管（４）に分流する吸入ガスが流れにく
くなり、相対的に、第１吸入管（３）を介して第１圧縮
機（１）に至る吸入ガスの導入量が、第２吸入管（４）
から第２圧縮機（２）に至る吸入ガスの導入量に対して
大となり、これにより、第１圧縮機（１）が高圧側に、
第２圧縮機（２）が低圧側となって、両者間に強制的に
差圧が発生することになる。(Function) A second suction pipe (4) is connected to the middle of the first suction pipe (3), and the connecting end of the second suction pipe (4) is connected to the first suction pipe (3).
3) is protruded inward from the inner wall of the pipe (3a), making it difficult for the suction gas to be diverted to the second suction pipe (4) to flow through the first suction pipe (3). The amount of suction gas introduced into the first compressor (1) is increased by the second suction pipe (4).
This increases the amount of suction gas introduced from the to the second compressor (2), which causes the first compressor (1) to move to the high pressure side.
The second compressor (2) becomes the low pressure side, and a pressure difference is forcibly generated between them.
しかも、この場合、吸入ガスへの混入油は、その濡れ性
により多くが管内壁を伝って運ばれるため、第１吸入管
（３）の管内壁（３ａ）より内方にその端部が突出され
た第２吸入管（４）へは、分流戻り油の油量も少なくな
る。こうして、強制差圧により高圧側となる第１圧縮機
（１）の戻り油量が大、低圧側となる第２圧縮機（２）
への戻り油ｍが小となる。Moreover, in this case, much of the oil mixed into the suction gas is carried along the inner wall of the pipe due to its wettability, so the end of the first suction pipe (3) protrudes inward from the inner wall (3a) of the pipe. The amount of diverted return oil to the second suction pipe (4) also decreases. In this way, due to the forced differential pressure, the return oil amount of the first compressor (1), which is on the high pressure side, is large, and the second compressor (2), which is on the low pressure side.
The return oil m becomes small.
従って、均油管（６）を介して、油量の多い高圧側の第
１圧縮機（１）から、油量の少ない低圧側の第２圧縮機
（２）へと常時部の移動がなされ、同圧縮機（１）（２
）間の油面高さが均一化されるのである。Therefore, the part is constantly moved from the first compressor (1) on the high pressure side with a large amount of oil to the second compressor (2) on the low pressure side with a small amount of oil via the oil equalizing pipe (6). The same compressor (1) (2
), the oil level between them is equalized.
（実施例）
第２図に示したツイン形圧縮装置は、密閉ケーシング（
Ｃ）の内部に、モータ（Ｍ）と圧縮要素（ＣＦ）とを組
込んだ低圧ドーム式の第１圧縮機（１）と第２圧縮機（
２）とを備え、これら各圧縮機（１）（２）の各ケーシ
ング（Ｃ）ＣＣ’）内に、第１及び第２吸入管（３）（
４）をそれぞれ接続すると共に、各圧縮要素（ＣＦ）（
ＣＦ）の吐出域を外部吐出管（５）に接続して、各吸入
管（３）（４）から各ケーシング（Ｃ）（Ｃ）内に導入
するガスを、各圧縮要素（ＣＦ）（ＣＦ）で圧縮し、圧
縮ガスを外部吐出管（５）に吐出するようにしている。(Example) The twin compressor shown in Fig. 2 has a hermetic casing (
A low-pressure dome-type first compressor (1) and a second compressor (C) that incorporate a motor (M) and a compression element (CF) are installed inside the compressor (C).
2), and the first and second suction pipes (3) (
4), and each compression element (CF) (
The discharge area of each compression element (CF) (CF) is connected to the external discharge pipe (5), and the gas introduced into each casing (C) (C) from each suction pipe (3) (4) is connected to each compression element (CF) (CF). ), and the compressed gas is discharged to an external discharge pipe (5).
又、前記各ケーシング（Ｃ）（Ｃ）の下方側胴部間には
、各油溜め（ａ）（ａ）の規定油量に見合う油面高さに
相当する部位に、均油管（６）を接続し、２つのケーシ
ング（Ｃ）（Ｃ）内を相互に連結している。In addition, between the lower body parts of each of the casings (C) (C), an oil equalizing pipe (6) is installed at a portion corresponding to the oil level height corresponding to the specified oil amount of each oil reservoir (a). The insides of the two casings (C) and (C) are interconnected.
以上の構成において、第１図に詳しく示すように、第１
圧縮機（１）に至る第１吸入管（３）の上下方向中間部
位に、この第１吸入管（３）内の流通ガス流に対し交差
するように、第２圧縮機（２）に至る２吸入管（４）の
先端部を水平方向に向けて接続すると共に、この第２吸
入管（４）の接続先端部（４ａ）を、第１吸入管（３）
の管内壁（３ａ）よりも内方に突出させる。In the above configuration, as shown in detail in FIG.
The first suction pipe (3) leading to the compressor (1) is connected to the second compressor (2) at an intermediate position in the vertical direction so as to intersect with the gas flow flowing in the first suction pipe (3). Connect the tip of the second suction pipe (4) horizontally, and connect the connecting tip (4a) of the second suction pipe (4) to the first suction pipe (3).
The tube is made to protrude inward from the inner wall (3a) of the tube.
この場合、前記接続先端部（４ａ）の管内壁（３ａ）か
らの突出量により、第２吸入管（４）側の減圧の程度を
調節することができる。又、図示のように第２吸入管（
４）を第１吸入管（３）に対しほぼ直交杖に交差させて
接続する他、第１吸入管（３）内のガス流の進行方向に
対し鋭角状あるいは鈍角状に斜めに接続するようにして
もよく、この接続角度の変更によっても第２吸入管（４
）側の減圧の程度を調節することができる。In this case, the degree of pressure reduction on the second suction pipe (4) side can be adjusted by the amount of protrusion of the connection tip (4a) from the pipe inner wall (3a). Also, as shown in the figure, the second suction pipe (
4) are connected to the first suction pipe (3) in a substantially orthogonal manner, or they are connected diagonally at an acute angle or an obtuse angle with respect to the direction of gas flow in the first suction pipe (3). By changing this connection angle, the second suction pipe (4
) side can be adjusted.
更に、接続先端部（４ａ）近くは図示のようにストレー
トに接続する他、第３図に示すように、接続先端部（４
ａ’ ）近くに屈曲部（４０）を形成して、該屈曲部末
端の接続先端部（４ａ’ ）を、第１吸入管（３）のガ
ス流進行方向に向ける等して、突出部分の形伏変更によ
っても減圧の程度を調節することができる。Furthermore, in addition to the straight connection near the connection tip (4a) as shown in the figure, the connection tip (4a) is connected straight as shown in FIG.
a'), and the connecting tip (4a') at the end of the bent part is directed toward the gas flow direction of the first suction pipe (3), so that the protruding part is The degree of decompression can also be adjusted by changing the shape.
こうして、第１及び第２吸入管（３）（４）の接続構造
により、２つの圧縮要素（ＣＦ）の能力分担の差異によ
って生じるであろう圧力差に打ち勝って、第１吸入管（
３）が接続される第１圧縮機（１）側が高圧側に、第２
吸入管（４）が接続される第２圧縮機（２）側が低圧側
となって、百ケーシング（Ｃ）（Ｃ）間に強制的に差圧
が発生することになる。一方、吸入ガスの混入油は、そ
の濡れ性により多くが管内壁を伝って運ばれるため、第
１吸入管（３）の管内壁（３ａ）より内方に突出された
第２吸入管（４）へ分流する油量は少なく、第１吸入管
（３）を介して、前記強制差圧により高圧側となる第１
圧縮機（１）側に戻る油量が多くなる。従って、均油管
（６）を介して、油量の多い高圧側の第１圧縮機（１）
から、油量の少ない低圧側の第２圧縮機（２）へと常時
部の移動が行われることになり、肉圧縮機（１）（２）
間の油面高さが、該均油管（６）の接続された規定油量
に見合う油面高さに揃えられるのである。In this way, the connection structure of the first and second suction pipes (3) and (4) overcomes the pressure difference that would occur due to the difference in capacity sharing between the two compression elements (CF).
3) is connected to the first compressor (1) side is the high pressure side, and the second
The second compressor (2) side to which the suction pipe (4) is connected becomes the low pressure side, and a pressure difference is forcibly generated between the casings (C). On the other hand, most of the oil mixed in the suction gas is carried along the inner wall of the pipe due to its wettability, so the second suction pipe (4) protrudes inward from the inner wall (3a) of the first suction pipe (3). ), the amount of oil that is diverted to the first suction pipe (3) is small, and the forced differential pressure causes the first
The amount of oil returning to the compressor (1) side increases. Therefore, through the oil equalizing pipe (6), the first compressor (1) on the high pressure side with a large amount of oil is
The meat compressors (1) and (2) are constantly moved from there to the second compressor (2) on the low-pressure side where the amount of oil is low.
The oil level height between them is made equal to the oil level height corresponding to the specified oil amount connected to the oil equalizing pipe (6).
（発明の効果）
以上、本発明では、第２圧縮機（２）側に接続する第２
吸入管（４）を、第１圧縮機（１）側に接続する第１吸
入管（３）の途中に接続して、前記第２吸入管（４）の
接続端部を前記第１吸入管（３）の管内壁（３ａ）より
内方に突出させたから、第１及び第２圧縮機（１）（２
）の分担能力の差異に基づく差圧に打ち勝ち、第１圧縮
機（１）側が常に高圧に、第２圧縮機（２）側が常に低
圧となる強制差圧を生じせしめることができ、しかも、
高圧となる第１圧縮機（１）側に油をより多く戻すこと
ができ、均油管（６）を介して、油量の多い高圧側の第
１圧縮機（１）から油量の少ない低圧側の第２圧縮機（
２）に向けて油量アンバランスの是正が適性に行われ、
第１及び第２圧縮機（１）（２）の油面高さを適性に保
持して、良好な潤滑特性を確保できるのである。(Effect of the invention) As described above, in the present invention, the second compressor (2) connected to the second compressor (2) side
The suction pipe (4) is connected to the middle of the first suction pipe (3) that connects to the first compressor (1), and the connecting end of the second suction pipe (4) is connected to the first suction pipe. (3) because it protrudes inward from the pipe inner wall (3a), the first and second compressors (1) (2
), it is possible to overcome the differential pressure caused by the difference in sharing capacity between the compressors (1) and 2.), and to generate a forced differential pressure in which the first compressor (1) side is always at high pressure and the second compressor (2) side is always at low pressure.
More oil can be returned to the first compressor (1) side, which has high pressure, through the oil equalizing pipe (6), from the first compressor (1) on the high pressure side, which has a large amount of oil, to the low pressure side, which has a small amount of oil. The second compressor on the side (
For 2), the oil quantity imbalance is appropriately corrected,
It is possible to maintain the oil level of the first and second compressors (1) and (2) at an appropriate level and ensure good lubrication characteristics.
第１図は本発明にかかるツイン形圧縮装置の要部を示す
断面図、第２図は同圧縮装置の全体構造を示す図面、第
３図は他の実施例を示す要部断面図、第４図は従来例を
示す図面である。
（１）・・・・・第１圧縮機
（２）・・・・・第２圧縮機
（３）・拳・・・第１吸入管
（３ａ）・・・・管内壁
（４）・−φ・・第２吸入管
（６）・・・・・均油管
（Ｃ）・・・・・密閉ケーンング
（ＣＦ）−−拳・圧縮要素FIG. 1 is a cross-sectional view showing the main parts of a twin compression device according to the present invention, FIG. 2 is a drawing showing the overall structure of the same compression device, and FIG. 3 is a cross-sectional view of main parts showing another embodiment. FIG. 4 is a drawing showing a conventional example. (1)...First compressor (2)...Second compressor (3)・Fist...First suction pipe (3a)...Pipe inner wall (4)・- φ...Second suction pipe (6)...Oil equalizing pipe (C)...Closed caning (CF)--Fist/compression element
Claims (1)
た第１圧縮機（１）と第２圧縮機（２）とを備え、前記
各圧縮機（１）（２）に吸入管（３）（４）を接続する
と共に、前記各圧縮機（１）（２）間に均油管（６）を
設けたツイン形圧縮装置において、前記第２圧縮機（２
）に接続する第２吸入管（４）を、第１圧縮機（１）に
接続する第１吸入管（３）の途中に接続して、前記第２
吸入管（４）の接続端部を前記第１吸入管（３）の管内
壁（３ａ）より内方に突出させたことを特徴とするツイ
ン形圧縮装置。1) Equipped with a first compressor (1) and a second compressor (2) in which a compression element (CF) is housed in a hermetic casing (C), and a suction pipe (3) is provided in each of the compressors (1) and (2). )(4) and an oil equalizing pipe (6) is provided between each of the compressors (1) and (2), in which the second compressor (2) is connected to the second compressor (2).
) is connected to the middle of the first suction pipe (3) connected to the first compressor (1), and the second suction pipe (4) connected to the
A twin compression device characterized in that the connecting end of the suction pipe (4) projects inward from the inner wall (3a) of the first suction pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63195428A JPH07101034B2 (en) | 1988-08-04 | 1988-08-04 | Twin type compression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63195428A JPH07101034B2 (en) | 1988-08-04 | 1988-08-04 | Twin type compression device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0245665A true JPH0245665A (en) | 1990-02-15 |
| JPH07101034B2 JPH07101034B2 (en) | 1995-11-01 |
Family
ID=16340907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63195428A Expired - Fee Related JPH07101034B2 (en) | 1988-08-04 | 1988-08-04 | Twin type compression device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07101034B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04214991A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214990A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214987A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214986A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04228895A (en) * | 1990-12-27 | 1992-08-18 | Daikin Ind Ltd | Connecting type compressor |
| JPH0571811A (en) * | 1991-09-09 | 1993-03-23 | Daikin Ind Ltd | Refrigerating plant |
| US5442142A (en) * | 1992-09-30 | 1995-08-15 | Mitsubishi Denki Kabushiki Kaisha | Large-current circuit board and method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055787U (en) * | 1983-09-26 | 1985-04-18 | 三菱電機株式会社 | Parallel compression refrigeration equipment |
-
1988
- 1988-08-04 JP JP63195428A patent/JPH07101034B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055787U (en) * | 1983-09-26 | 1985-04-18 | 三菱電機株式会社 | Parallel compression refrigeration equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04214991A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214990A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214987A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04214986A (en) * | 1990-12-13 | 1992-08-05 | Daikin Ind Ltd | Coupled compression equipment |
| JPH04228895A (en) * | 1990-12-27 | 1992-08-18 | Daikin Ind Ltd | Connecting type compressor |
| JPH0571811A (en) * | 1991-09-09 | 1993-03-23 | Daikin Ind Ltd | Refrigerating plant |
| US5442142A (en) * | 1992-09-30 | 1995-08-15 | Mitsubishi Denki Kabushiki Kaisha | Large-current circuit board and method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07101034B2 (en) | 1995-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |