JPH0697038B2 - Oil level controller and oil separator in refrigeration system - Google Patents
Oil level controller and oil separator in refrigeration systemInfo
- Publication number
- JPH0697038B2 JPH0697038B2 JP1290889A JP1290889A JPH0697038B2 JP H0697038 B2 JPH0697038 B2 JP H0697038B2 JP 1290889 A JP1290889 A JP 1290889A JP 1290889 A JP1290889 A JP 1290889A JP H0697038 B2 JPH0697038 B2 JP H0697038B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pipe
- separator
- oil separator
- control device
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—Component parts or details not otherwise provided for in this subclass
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は冷凍装置における油面レベル制御装置と油分離
器、詳しくは、並列運転可能とした複数の圧縮機を備
え、これら圧縮機に対応してそれぞれ各別に油分離器を
設けた冷凍装置における前記油分離器の油面レベル制御
装置及び油圧レベル制御装置を組込んだ油分離器に関す
る。Description: TECHNICAL FIELD The present invention relates to an oil level control device and an oil separator in a refrigeration system, more specifically, a plurality of compressors that can be operated in parallel, and are compatible with these compressors. Further, the present invention relates to an oil separator incorporating the oil level control device and the oil pressure level control device of the oil separator in the refrigerating device in which the oil separators are separately provided.
(従来の技術) 従来並列運転可能とした複数の圧縮機を備え、これら圧
縮機に対応してそれぞれ各別に油分離器を設けた冷凍装
置において、前記各油分離器の油圧レベルを制御するも
のは、例えば特開昭60-79190号公報に示され、また、第
10図に示したように知られている。(Prior Art) Conventionally, a refrigeration system provided with a plurality of compressors that can be operated in parallel, and an oil separator is provided for each of these compressors, and the oil pressure level of each oil separator is controlled. Are disclosed, for example, in JP-A-60-79190, and
It is known as shown in Figure 10.
第10図に示したものは、複数の圧縮機(1a)(1b)(1
c)の各吐出側に、油分離器(2a)(2b)(2c)を設け
て、これら各油分離器(2a)(2b)(2c)にレベルスイ
ッチ(S1)(S2)を設けており、前記各油分離器(2a)
(2b)(2c)の底部は、各油分離器(2a)(2b)(2c)
に対応して設ける第1電磁弁(3a)(3b)(3c)を介し
て一本の連通管(4)で連通している。What is shown in FIG. 10 is that a plurality of compressors (1a) (1b) (1
Provide oil separators (2a) (2b) (2c) on each discharge side of c) and add level switches (S 1 ) (S 2 ) to these oil separators (2a) (2b) (2c). Provided with each of the above oil separators (2a)
The bottom of (2b) (2c) is the oil separator (2a) (2b) (2c)
Are communicated with one communicating pipe (4) through the first solenoid valves (3a) (3b) (3c) provided corresponding to the above.
そして、前記各電磁弁(3a)(3b)(3c)の上流側に
は、各圧縮機(1a)(1b)(1c)の給油部に連通する第
1注油管(5)をそれぞれ接続すると共に、前記各電磁
弁(3a)(3b)(3c)の各下流側における前記連通管
(4)には、第2電磁弁(6a)(6b)(6c)を備え、前
記各圧縮機(1a)(1b)(1c)の吸入側に連通する第2
注油管(7)をそれぞれ接続したものである。And the 1st lubrication pipe (5) connected to the lubrication part of each compressor (1a) (1b) (1c) is connected to the upstream side of each said solenoid valve (3a) (3b) (3c), respectively. Along with the solenoid valves (3a) (3b) (3c), the communication pipe (4) on the downstream side of each solenoid valve (2) is provided with a second solenoid valve (6a) (6b) (6c). 2nd which communicates with the suction side of 1a) (1b) (1c)
The lubrication pipes (7) are connected to each other.
しかして、例えば1つの油分離器(2a)の油面レベルが
低下した場合、この油分離器(2a)に取付けた前記レベ
ルスイッチ(S1)が作動して、前記第2電磁弁(6a)と
第1電磁弁(3b)(3c)とが開き、前記油分離器(2a)
以外の油分離器(2b)(2c)から前記第2注油管(7)
を介して圧縮機(1a)を経て前記油分離器(2a)に流
れ、該油分離器(2a)の油面レベルを上昇制御するので
ある。尚、第10図において(2)はデミスタであり、
(8)は逆止弁(8a)を介して各油分離器(2a)(2b)
(2c)の出口室側に連通する吐出管であり、(9)は逆
止弁(9a)を介して圧縮機(1a)(1b)(1c)の吸入側
へ接続する吸入管である。Then, for example, when the oil level of one oil separator (2a) is lowered, the level switch (S 1 ) attached to this oil separator (2a) is actuated, and the second solenoid valve (6a) is activated. ) And the first solenoid valve (3b) (3c) open, and the oil separator (2a)
Other oil separators (2b) (2c) to the second oiling pipe (7)
Through the compressor (1a) to the oil separator (2a), and the oil level of the oil separator (2a) is controlled to rise. In addition, in FIG. 10, (2) is a demister,
(8) is each oil separator (2a) (2b) through the check valve (8a)
(2c) is a discharge pipe communicating with the outlet chamber side, and (9) is a suction pipe connected to the suction side of the compressors (1a) (1b) (1c) via a check valve (9a).
(発明が解決しようとする課題) 所が、以上の如く各油分離機(2a)(2b)(2c)にレベ
ルスイッチ(S1)(S2)を取付け、このレベルスイッチ
(S1)(S2)の作動で、レベル制御を行う場合各油分離
器(2a)(2b)(2c)の油面が静止状にあれば問題はな
く、油面レベルの均一化が可能となるのであるが、油分
離器(2a)(2b)(2c)の油面は、油のフォーミングに
より変化するため、前記レベルスイッチ(S1)(S2)が
誤動作し、例えばフォーミングの生ずる湿り運転時等に
おいて、誤ったレベル制御が行なれることになり、信頼
性に欠ける問題があった。(Problems to be solved by the invention) As described above, the level switches (S 1 ) (S 2 ) are attached to the oil separators (2a) (2b) (2c) as described above, and the level switches (S 1 ) ( When level control is performed by the operation of S 2 ), there is no problem if the oil level of each oil separator (2a) (2b) (2c) is static, and it is possible to make the oil level uniform. However, the oil level of the oil separators (2a) (2b) (2c) changes due to oil forming, so that the level switches (S 1 ) (S 2 ) malfunction and, for example, during wet operation where forming occurs. However, there was a problem in that the level control was erroneously performed and the reliability was lacking.
また、レベルスイッチ(S1)(S2)は、一般にコストが
高く、このため冷凍装置全体のコストを上げる問題があ
り、低コストを狙う冷凍装置には適用できないのであ
る。Further, the level switches (S 1 ) (S 2 ) are generally high in cost, and therefore, there is a problem that the cost of the entire refrigerating apparatus is increased, and it cannot be applied to a refrigerating apparatus aiming at low cost.
本発明の目的は、高コストで、かつ、信頼性の乏しいレ
ベルスイッチを用いることなく簡単な構成で、複数の油
分離器における油面レベルを均一化できる油レベル制御
装置及び油分離器を提供する点にある。An object of the present invention is to provide an oil level control device and an oil separator that can make the oil level in a plurality of oil separators uniform at a high cost and with a simple configuration without using an unreliable level switch. There is a point to do.
(課題を解決するための手段) 本発明は、並列運転可能とした複数の圧縮機(10a,10
b)を備え、これら圧縮機(10a,10b)に対応してそれぞ
れ各別に油分離器(11a,11b)を設けた冷凍装置におけ
る前記油分離器(11a,11b)の油面レベル制御装置であ
って、前記各油分離器(11a,11b)の適正油面高さ位置
に、オーバーフローポート(20a,20b)を設けて、これ
らポート(20a,20b)を、該ポート(20a,20b)を設ける
油分離器(11a,11b)に対し低圧となる部位に接続した
ことを特徴とするものである。(Means for Solving the Problems) The present invention is directed to a plurality of compressors (10a, 10a) that can be operated in parallel.
b) and an oil level control device for the oil separator (11a, 11b) in a refrigeration system in which a separate oil separator (11a, 11b) is provided for each of the compressors (10a, 10b). Therefore, the overflow ports (20a, 20b) are provided at the proper oil surface height positions of the oil separators (11a, 11b), and these ports (20a, 20b) are connected to these ports (20a, 20b). It is characterized in that the oil separator (11a, 11b) to be provided is connected to a portion having a low pressure.
前記オーバーフローポート(20a,20b)は、これらオー
バーフローポート(20a,20b)を設ける油分離器(11a,1
1b)に対応する圧縮機(10a,10b)以外の圧縮機におけ
る中間圧力部(21a,21b)又は吸入管(26a,26b)に接続
するのが好ましい。The overflow ports (20a, 20b) are oil separators (11a, 1b) provided with these overflow ports (20a, 20b).
It is preferable to connect to the intermediate pressure section (21a, 21b) or the suction pipe (26a, 26b) in a compressor other than the compressor (10a, 10b) corresponding to 1b).
斯くすることにより油面レベル制御が迅速に行える効果
がある。また、前記オーバーフローポート(20a,20b)
は、圧縮機(10a,10b)の吐出側に接続する凝縮器(3
2)の入口側に至る配管系に接続することもできる。By doing so, there is an effect that the oil level control can be performed quickly. Also, the overflow ports (20a, 20b)
Is the condenser (3 connected to the discharge side of the compressor (10a, 10b)
It can also be connected to the piping system that extends to the inlet side of 2).
また、油分離器において、分離要素(13)により入口室
(14)と出口室(15)とを区画した分離器本体(12)に
おける適正油面高さ位置にオーバーフローポート(20)
を設け、このオーバーフローポート(20)を前記分離要
素(13)の下流側に連通させることもできる。Further, in the oil separator, the overflow port (20) is located at an appropriate oil surface height position in the separator body (12) that divides the inlet chamber (14) and the outlet chamber (15) by the separation element (13).
It is also possible to connect the overflow port (20) to the downstream side of the separation element (13).
この場合油分離器自体が油面レベル制御機能をもつこと
になり、油面レベル均一化のための大がかりな配管を不
要にできる。In this case, the oil separator itself has a function of controlling the oil level, and it is possible to eliminate the need for large-scale piping for uniformizing the oil level.
(作用) 油分離器(11a,11b)の油面レベルが、オーバーフロー
ポート(20a,20b)の開口位置より高くなれば、その油
分離器(11a,11b)における油が前記オーバーフローポ
ート(20a,20b)を介してオーバーフローし、前記油分
離器(11a,11b)に対応する圧縮機(10a,10b)以外の圧
縮機の中間圧力部(21a,21b)又は吸入管(26a,26b)或
いは圧縮機の吐出側で凝縮器(32)の入口側に至る配管
系、若しくは前記油分離器(11a,11b)における分離要
素(13)の下流側に流出し、他の油分離器(11a,11b)
の油面レベルを上昇させるのである。(Operation) If the oil level of the oil separator (11a, 11b) becomes higher than the opening position of the overflow port (20a, 20b), the oil in the oil separator (11a, 11b) will be discharged from the overflow port (20a, 11b). 20b) overflows, and the intermediate pressure part (21a, 21b) of the compressor other than the compressor (10a, 10b) corresponding to the oil separator (11a, 11b) or the suction pipe (26a, 26b) or compression On the discharge side of the machine, it flows out to the inlet side of the condenser (32) or to the downstream side of the separation element (13) in the oil separator (11a, 11b), and the other oil separator (11a, 11b). )
Raises the oil level of.
つまり、複数の圧縮機及び油分離器を備えた冷凍装置に
充填される油量は一定であるから、一つの油分離器(11
a)の油面レベルが上昇すると、他の油分離器(11b)の
油面レベルは下降するのであるから、前記油分離器(11
a)からオーバーフローさせることにより、油面レベル
が下降している他の凝縮器(11b)の油面レベルを正常
レベルに制御できるのである。That is, since the amount of oil filled in the refrigerating apparatus including the plurality of compressors and the oil separator is constant, one oil separator (11
When the oil level in (a) rises, the oil level in the other oil separators (11b) decreases, so the oil separator (11b)
By overflowing from (a), the oil level of the other condenser (11b) whose oil level is decreasing can be controlled to a normal level.
(実施例) 第1図に示した第1実施例は、2台のスクリュー圧縮機
(10a)(10b)を並列運転可能に接続し、これら各圧縮
機(10a)(10b)に対応して設ける油分離器(11a)(1
1b)を、前記圧縮機(10a)(10b)と別に形成し、これ
ら各圧縮機(10a)(10b)の吐出側に接続したものであ
る。(Embodiment) In the first embodiment shown in FIG. 1, two screw compressors (10a) and (10b) are connected so that they can be operated in parallel, and they correspond to these compressors (10a) and (10b). Installed oil separator (11a) (1
1b) is formed separately from the compressors (10a) (10b) and is connected to the discharge side of each of the compressors (10a) (10b).
前記油分離器(11a)(11b)は、何れも分離器本体(1
2)に、デミスタなどの分離要素(13)を設けて、入口
室(14)と出口室(15)とを区画し、前記入口室(14)
に吐出ガス入口管(16)を、前記出口管(15)に吐出ガ
ス出口管(17)をそれぞれ接続したもので、前記油分離
器(11a)(11b)における各吐出ガス入口管(16)は、
前記油分離器(11a)(11b)に対応する圧縮機(10a)
(10b)の吐出側に接続し、また、前記各吐出ガス出口
管(17)はそれぞれ逆止弁(18a)(18b)を介して一本
の吐出管(19)に接続している。Each of the oil separators (11a) and (11b) has a separator body (1
A separation element (13) such as a demister is provided in 2) to partition the inlet chamber (14) and the outlet chamber (15), and the inlet chamber (14)
A discharge gas inlet pipe (16) and a discharge gas outlet pipe (17) connected to the outlet pipe (15), respectively, and each discharge gas inlet pipe (16) in the oil separators (11a) (11b) Is
Compressor (10a) corresponding to the oil separator (11a) (11b)
(10b) is connected to the discharge side, and each discharge gas outlet pipe (17) is connected to one discharge pipe (19) via check valves (18a) (18b).
また、前記各油分離機(11a)(11b)における分離器本
体(12)には、適正油面高さ位置に、オーバーフローポ
ート(20a)(20b)を設けており、これらオーバーフロ
ーポート(20a)(20b)を、これらポート(20a)(20
b)を設ける油分離器(11a)(11b)に対応する圧縮機
以外の圧縮機(10b)(10a)の中間圧力部(21a)(21
b)に逆止弁(23a)(23b)及び電磁弁(24a)(24b)
をもった注油管(22a)(22b)を介して接続するのであ
る。Further, the separator main body (12) of each of the oil separators (11a) (11b) is provided with overflow ports (20a) (20b) at appropriate oil surface height positions. These overflow ports (20a) (20b) to these ports (20a) (20
b) The intermediate pressure section (21a) (21) of the compressor (10b) (10a) other than the compressor corresponding to the oil separator (11a) (11b)
b) Check valve (23a) (23b) and solenoid valve (24a) (24b)
It is connected through the oiling pipes (22a) and (22b) with the.
尚、前記電磁弁(24a)(24b)は、前記圧縮機(10a)
(10b)の運転制御に連動して開閉するもので圧縮機(1
0a)(10b)と共に運転する場合には、前記電磁弁(24
a)(24b)を開き、一方の圧縮機(10a)(10b)を停止
する時には運転している圧縮機(10a)又は(10b)に対
応する油分離器(11a)又は(11b)に接続の注油管(23
a)又は(22b)に介装する電磁弁(24a)又は(24b)を
閉じ、前記入口管(14)に導入される吐出ガスが停止側
の圧縮機に流れるのを防止している。The solenoid valves (24a) (24b) are the same as the compressor (10a).
The compressor (1b) that opens and closes in conjunction with the operation control of (10b)
When operating with 0a) and (10b), the solenoid valve (24
a) When opening (24b) and stopping one compressor (10a) (10b), connect it to the oil separator (11a) or (11b) corresponding to the operating compressor (10a) or (10b) Oiling pipe (23
The solenoid valve (24a) or (24b) interposed in a) or (22b) is closed to prevent the discharge gas introduced into the inlet pipe (14) from flowing to the compressor on the stop side.
しかして、以上の構成において、例えば油分離器(11
a)の油面レベルが、前記オーバーフローポート(20a)
の開口位置以上に上昇すると、前記ポート(20a)から
オーバーフローし、前記注油管(22a)を介して圧縮機
(10b)の中間圧力部(21b)に注油される。Thus, in the above configuration, for example, the oil separator (11
The oil level of a) is the overflow port (20a)
When it rises above the open position, it overflows from the port (20a) and is oiled to the intermediate pressure part (21b) of the compressor (10b) through the oiling pipe (22a).
即ち、前記油分離器(11a)の油面レベルが上昇すれ
ば、前記油分離器(11a)以外の油分離器(11b)の油面
レベルが下降することになるが、前記オーバーフローポ
ート(20a)からのオーバーフローにより前記油分離器
(11b)の油面レベルは正常レベルに上昇することにな
る。That is, if the oil level of the oil separator (11a) rises, the oil level of the oil separators (11b) other than the oil separator (11a) will fall, but the overflow port (20a ), The oil level of the oil separator (11b) rises to a normal level.
そして、前記オーバーフローにより前記油分離器(10
a)の油面レベルが下降し、前記オーバーフローポート
(20a)の開口位置以下になると、オーバーフローが停
止し、前記各油分離器(11a)(11b)の油面レベルが均
一化することになる。Then, due to the overflow, the oil separator (10
When the oil level of a) drops and falls below the opening position of the overflow port (20a), the overflow stops and the oil levels of the oil separators (11a) and (11b) become uniform. .
以上説明した第1実施例は、前記注油管(22a)(22b)
を圧縮機(10a)(10b)の中間圧部分に接続したが、第
1図点線で示した通り吸入管(26a)(26b)に接続して
もよい。The first embodiment described above is the same as the oiling pipe (22a) (22b).
Is connected to the intermediate pressure portion of the compressor (10a) (10b), but may be connected to the suction pipes (26a) (26b) as shown by the dotted line in FIG.
また、第1実施例では、前記吐出ガス管(17)に逆止弁
(18a)(18b)を介装したが、第2図に示した第2実施
例のように、吸入管(26a)(26b)に逆止弁(18a)(1
8b)を介装してもよい。斯くすることにより、前記注油
管(22a)(22b)の逆止弁(23a)(23b)を省略でき
る。Further, in the first embodiment, the check valves (18a) and (18b) are provided in the discharge gas pipe (17), but as in the second embodiment shown in FIG. 2, the suction pipe (26a) is provided. Check valve (18a) (1
8b) may be interposed. By doing so, the check valves (23a) (23b) of the oiling pipes (22a) (22b) can be omitted.
また、第3図に示した第3実施例のように、前記圧縮機
(10a)(10b)の中間圧力部(21a)(21b)に、これら
圧縮機(10a)(10b)からの吐出ガス温度を一定に制御
するための中間液注入ライン(27a)(27b)を設けた冷
凍装置においては、前記各油分離器(11a)(11b)のオ
ーバーフローポート(20a)(20b)に連通する前記注油
管(22a)(22b)を、逆止弁(28a)(28b)を介して、
前記中間液注入ライン(27b)(27a)に接続してもよ
い。Further, as in the third embodiment shown in FIG. 3, the discharge gas from the compressors (10a) and (10b) is supplied to the intermediate pressure parts (21a) and (21b) of the compressors (10a) and (10b). In the refrigerating apparatus provided with the intermediate liquid injection lines (27a) (27b) for controlling the temperature to be constant, the above-mentioned communicating with the overflow ports (20a) (20b) of the respective oil separators (11a) (11b) Insert the lubrication pipes (22a) (22b) through the check valves (28a) (28b)
It may be connected to the intermediate liquid injection lines (27b) and (27a).
尚、前記中間液注入ライン(27a)(27b)は、図示して
いないが、例えば受液器などの液溜部に中間液注入基管
(27)を介して接続されており、各中間液注入ライン
(27a)(27b)は、吐出ガス温度が一定以上のとき開く
電磁弁(29)と、中間圧力に減圧する膨張弁(30)とを
介装しているもので、この各中間液注入ライン(27a)
(27b)における前記各電磁弁(29)の上流側に逆止弁
(31)をそれぞれ介装し、前記電磁弁(29)と逆止弁
(31)との間に、前記注油管(22a)(22b)を接続する
のであって、オーバーフローした油は、前記電磁弁(2
9)の開動作時圧縮機(10a)(10b)に流れ、前記各油
分離器(11a)(11b)における油面レベルの均一化が可
能となる。Although not shown, the intermediate liquid injection lines (27a) and (27b) are connected to a liquid reservoir such as a receiver via an intermediate liquid injection base pipe (27). The injection lines (27a) (27b) are provided with a solenoid valve (29) that opens when the discharge gas temperature is above a certain level, and an expansion valve (30) that reduces the pressure to an intermediate pressure. Injection line (27a)
A check valve (31) is provided on the upstream side of each solenoid valve (29) in (27b), and the lubrication pipe (22a) is provided between the solenoid valve (29) and the check valve (31). ) (22b) and the overflowed oil is
During the opening operation of 9), the oil flows to the compressors (10a) (10b), and the oil level in each of the oil separators (11a) (11b) can be made uniform.
又、以上説明した実施例は、各圧縮機(10a)(10b)に
対応する各油分離器(11a)(11b)のオーバーフローポ
ート(20a)(20b)を、前記油分離器(11a)(11b)に
対応する圧縮機以外の圧縮機の中間圧力部(21a)(21
b)又は吸入管(26a)(26b)に注油管(22a)(22b)
を介して接続したものであるが、その他、第4図乃至第
8図に示したように、注油管を1本の連通管で連通し
て、吐出管(19)又は平面圧力部或いは吸入管に接続し
てもよい。Further, in the embodiment described above, the overflow ports (20a) (20b) of the oil separators (11a) (11b) corresponding to the compressors (10a) (10b) are replaced by the oil separators (11a) ( Intermediate pressure parts (21a) (21a) (21
b) Or oil supply pipes (22a) (22b) to suction pipes (26a) (26b)
In addition, as shown in FIGS. 4 to 8, the oil supply pipe is connected by a single communication pipe, and the discharge pipe (19) or the flat pressure portion or the suction pipe is connected. You may connect to.
第4図に示した第4実施例は、3台のスクリュー圧縮機
(10a)(10b)(10c)を並列運転可能に接続したもの
で、これら各圧縮機(10a)(10b)(10c)の吐出側に
は、それぞれ油分離器(11a)(11b)(11c)を接続
し、これら各油分離器(11a)(11b)(11c)の各吐出
ガス出口管(17)を、逆止弁(18a)(18b)(18c)を
介して一本の吐出管(19)に接続している。In the fourth embodiment shown in FIG. 4, three screw compressors (10a) (10b) (10c) are connected in parallel so that they can be operated in parallel. Each of these compressors (10a) (10b) (10c) Oil separators (11a) (11b) (11c) are connected to the discharge side of each, and the discharge gas outlet pipes (17) of these oil separators (11a) (11b) (11c) It is connected to one discharge pipe (19) through valves (18a) (18b) (18c).
尚、この吐出管(19)は、凝縮器(32)の入口に接続さ
れており、前記凝縮器(32)の出口は、受液器(33)及
び膨張弁(34)を介して液管(35)により蒸発器(36)
に接続され、この蒸発器(36)の出口に接続される低圧
ガス管(37)が吸入管(26a)(26b)(26c)を介して
前記各圧縮器(10a)(10b)(10c)の吸入口に連通し
ている。The discharge pipe (19) is connected to the inlet of the condenser (32), and the outlet of the condenser (32) is a liquid pipe via the liquid receiver (33) and the expansion valve (34). Evaporator with (35) (36)
The low pressure gas pipe (37) connected to the outlet of the evaporator (36) is connected to the compressors (10a) (10b) (10c) via the suction pipes (26a) (26b) (26c). Communicates with the intake port of.
そして、前記各油分離器(11a)(11b)(11c)の適正
油面高さ位置に開口するオーバーフローポート(20a)
(20b)(20c)には、逆止弁(40a)(40b)(40c)を
もった注油管(41a)(41b)(41c)を接続し、これら
注油管(41a)(41b)(41c)を一本の連通管(42)に
接続し、この連通管(42)を前記吐出管(19)に接続し
たものである。An overflow port (20a) that opens at an appropriate oil level height of each of the oil separators (11a) (11b) (11c)
Oil supply pipes (41a) (41b) (41c) having check valves (40a) (40b) (40c) are connected to (20b) (20c), and these oil supply pipes (41a) (41b) (41c) ) Is connected to one communication pipe (42), and this communication pipe (42) is connected to the discharge pipe (19).
しかして、この第4実施例において前記吐出管(19)
は、各油分離器(11a)(11b)(11c)における出口室
(15)、つまり分離要素(13)の吐出ガス通過側に設け
る吐出ガス出口管(17)と接続するのに対し、前記連通
管(42)は、前記各油分離器(11a)(11b)(11c)の
入口室、つまり前記分離要素(13)の吐出ガス通過前に
開口するオーバーフローポート(20a)(20b)(20c)
と注油管(41a)(41b)(41c)を介して接続している
のであるから、前記連通管(42)を吐出管(19)に接続
する接続部位においては、連通管(42)内の圧力が吐出
管(19)内の圧力より高くなっており、従って、その圧
力差により、前記オーバーフローポート(20a)(20b)
(20c)の一つからオーバーフローした油は吐出管(1
9)に流れることにより、油圧レベルが低下している油
分離器の油面レベルを上昇させられ、油面の均一化が可
能となるのである。Then, in the fourth embodiment, the discharge pipe (19)
Is connected to the outlet chamber (15) in each of the oil separators (11a) (11b) (11c), that is, the discharge gas outlet pipe (17) provided on the discharge gas passage side of the separation element (13). The communication pipe (42) is an overflow chamber (20a) (20b) (20c) that opens before the passage of the discharge gas of the oil separators (11a) (11b) (11c), that is, the separation element (13). )
Since it is connected with the oil supply pipes (41a) (41b) (41c) via the oil supply pipes (41a) (41b) (41c), at the connection portion connecting the communication pipe (42) to the discharge pipe (19), The pressure is higher than the pressure in the discharge pipe (19), and therefore due to the pressure difference, the overflow ports (20a) (20b)
Oil overflowing from one of the (20c)
By flowing to 9), the oil level of the oil separator whose oil pressure level is decreasing can be raised, and the oil level can be made uniform.
尚、第4実施例において、前記油分離器(11a)(11b)
(11c)の各吐出ガス出口管(17)を介装する逆止弁(1
8a)(18b)(18c)は、第2図に示した第2実施例のよ
うに、吸入管(26a)(26b)(26c)に介装してもよい
し、また、前記注油管(41a)(41b)(41c)は、前記
各吐出ガス管(17)に個別に接続してもよい。In the fourth embodiment, the oil separator (11a) (11b)
Check valve (1) with each discharge gas outlet pipe (17) of (11c)
8a) (18b) (18c) may be interposed in the suction pipes (26a) (26b) (26c) as in the second embodiment shown in FIG. 41a) (41b) (41c) may be individually connected to each of the discharge gas pipes (17).
また、第5図に示した第5実施例は、第4実施例におけ
る連通管(42)を吐出管(19)に接続することなく、前
記連通管(42)に分岐管(43a)(43b)(43c)を設け
て、これら分岐管(43a)(43b)(43c)を前記圧縮機
(10a)(10b)(11c)の停止時閉動作する電磁弁(44
a)(44b)(44c)を介して、これら圧縮機(10a)(10
b)(10c)の中間圧力部(21a)(21b)(21c)に接続
したものである。In the fifth embodiment shown in FIG. 5, the branch pipes (43a) (43b) are connected to the communication pipe (42) without connecting the communication pipe (42) in the fourth embodiment to the discharge pipe (19). ) (43c) and these branch pipes (43a) (43b) (43c) are closed when the compressors (10a) (10b) (11c) are stopped.
a) (44b) (44c) through these compressors (10a) (10
b) It is connected to the intermediate pressure section (21a) (21b) (21c) of (10c).
また、第5実施例は中間圧力部(21a)(21b)(21c)
に分岐管(43a)(43b)(43c)に接続したが、第6図
に示した第6実施例のように前記連通管(42)を吸入管
(26a)(26b)(26c)を接続する低圧ガス管(37)に
接続してもよい。Further, the fifth embodiment has intermediate pressure parts (21a) (21b) (21c).
Was connected to the branch pipes (43a) (43b) (43c), but the communication pipe (42) was connected to the suction pipes (26a) (26b) (26c) as in the sixth embodiment shown in FIG. It may be connected to the low pressure gas pipe (37).
また、第3図に示した第3実施例と同様、中間液注入ラ
イン(27a)(27b)(27c)を設けた冷凍装置において
は、第7図に示した第7実施例のように各注油管(41
a)(41b)(41c)を連通する連通管(42)を、前記中
間液注入ライン(27a)(27b)(27c)を分岐する中間
液注入基管(44)に接続してもよい。Further, similar to the third embodiment shown in FIG. 3, in the refrigerating apparatus provided with the intermediate liquid injection lines (27a) (27b) (27c), each of the Oiling pipe (41
The communication pipe (42) that communicates a) (41b) (41c) may be connected to the intermediate liquid injection base pipe (44) that branches the intermediate liquid injection lines (27a) (27b) (27c).
更に第8図に示したように、凝縮器(32)と膨張弁(3
4)との間の液管に中間冷却器(38)を設けて、中間圧
力のガス冷媒を各圧縮機(10a)(10b)(10c)の中間
圧力部(21a)(21b)(21c)に、逆止弁(45a)(45
b)(45c)をもったガス注入ライン(46a)(46b)(46
c)を介して注入し、圧縮機能力を向上すると共に、液
冷媒を過冷却して冷凍能力アップを図るようにした冷凍
装置においては、前記各注油管(41a)(41b)(41c)
を連通する連通管(42)を、前記ガス注入ライン(46
a)(46b)(46c)を分岐するガス注入基管(47)に接
続してもよい。尚、第8図において(48)は中間膨張弁
である。Further, as shown in FIG. 8, the condenser (32) and the expansion valve (3
An intermediate cooler (38) is provided in the liquid pipe between the intermediate pressure part (21a), (21b) and (21c) of each compressor (10a) (10b) (10c). Check valve (45a) (45
b) Gas injection line with (45c) (46a) (46b) (46
In the refrigerating device which is injected through the c) to improve the compression function and to supercool the liquid refrigerant to increase the refrigerating capacity, the oiling pipes (41a) (41b) (41c)
A communication pipe (42) communicating with the gas injection line (46).
You may connect a) (46b) (46c) to the branched gas injection base pipe (47). Incidentally, (48) in FIG. 8 is an intermediate expansion valve.
又、第9図に示したものは、本発明油分離器の実施例を
示すもので、油分離器(11)自体に、油圧レベル制御機
能を組込んだものである。しかして、第9図に示したも
のは、分離器本体(12)にデミスタなどの分離要素(1
3)を内装して区画する入口室(14)に吐出ガス入口管
(16)を開口させ、出口室(15)に吐出ガス出口管(1
7)を接続すると共に、前記分離器本体(12)における
適正油面高さ位置にオーバーフローポート(20)を設
け、このポート(20)を、前記吐出ガス出口管(17)
で、かつ、該出口管(17)に介装する逆止弁(18)の上
流側に、注油管(22)を介して連通させたものである。Further, FIG. 9 shows an embodiment of the oil separator of the present invention, in which the oil separator (11) itself has a hydraulic pressure level control function incorporated therein. Therefore, in the structure shown in FIG. 9, the separator body (12) has a separating element (1
The discharge gas inlet pipe (16) is opened in the inlet chamber (14) that internally divides and defines the discharge gas outlet pipe (1) in the outlet chamber (15).
7) is connected, and an overflow port (20) is provided at an appropriate oil surface height position in the separator body (12), and this port (20) is connected to the discharge gas outlet pipe (17).
In addition, it is communicated with the upstream side of the check valve (18) provided in the outlet pipe (17) through the oil supply pipe (22).
この場合も、前記分離器本体(12)の油面レベルが、前
記オーバーフローポート(20)の開口位置より高くなる
と、前記本体(12)内の油がオーバーフローし、前記吐
出ガス出口管(17)に流出するのであって、前記各実施
例のように並列運転可能とした圧縮機に接続することに
より、各油分離器の油面レベルを均一化できるのであ
る。Also in this case, when the oil level of the separator body (12) becomes higher than the opening position of the overflow port (20), the oil in the body (12) overflows and the discharge gas outlet pipe (17) The oil level of each oil separator can be made uniform by connecting to the compressor that can be operated in parallel as in each of the above-described embodiments.
尚、第9実施例において前記注油管(22)を吐出ガス出
口管(17)に接続したが、前記出口室(15)でもよい。Although the lubrication pipe (22) is connected to the discharge gas outlet pipe (17) in the ninth embodiment, it may be the outlet chamber (15).
以上説明した実施例は、何れも油分離器(11a)(11b)
(11c)を圧縮機(10a)(10b)(10c)に別に形成し
て、吐出ガス入口管(17)を介して各圧縮機の吐出側に
接続したが、前記油分離器を圧縮機と一体に形成しても
よい。The embodiments described above are all oil separators (11a) (11b)
(11c) was separately formed on the compressors (10a), (10b) and (10c) and connected to the discharge side of each compressor via the discharge gas inlet pipe (17). You may form integrally.
また、前記圧縮機は、スクリュー圧縮機であるが、その
他スクロール圧縮機、ロータリー圧縮機を用いる場合で
も同様に適用できる。Further, although the compressor is a screw compressor, it can be similarly applied when other scroll compressors or rotary compressors are used.
(発明の効果) 本発明は、以上の如く並列運転可能とした複数の圧縮機
(10a,10b)を備え、これら圧縮機(10a,10b)に対応し
てそれぞれ各別に油分離器(11a,11b)を設けた冷凍装
置における前記油分離器(11a,11b)の油面レベル制御
装置であって、前記各油分離器(11a,11b)の適正油面
高さ位置に、オーバーフローポート(20a,20b)を設け
て、これらポート(20a,20b)を、該ポート(20a,20b)
を設ける油分離器(11a,11b)に対し低圧となる部位に
接続したことを特徴とするものであるから、従来例のよ
うにレベルスイッチを用いなくとも簡単な構成で複数の
油分離器(11a)(11b)における油面レベルを均一化で
きるのであって、従来例のように比較し大幅なコストダ
ウンが可能となるのである。(Effects of the Invention) The present invention is provided with a plurality of compressors (10a, 10b) that can be operated in parallel as described above, and respectively correspond to these compressors (10a, 10b), and separate oil separators (11a, 10b) are provided. An oil level control device for the oil separators (11a, 11b) in a refrigerating machine provided with an overflow port (20a) at an appropriate oil level height of each oil separator (11a, 11b). , 20b) and these ports (20a, 20b) are connected to the ports (20a, 20b)
Since the oil separators (11a, 11b) provided with are connected to a low-pressure part, a plurality of oil separators ( Since the oil level in 11a) and (11b) can be made uniform, the cost can be significantly reduced compared to the conventional example.
又、従来例のようにレベルスイッチを用いないから、そ
の誤動作による油移動はなく、正確な油圧レベルの均一
化が行なえ、しかも、レベルスイッチのような作動部材
を用いないから、故障の問題もなく、耐久性にも優れて
いるのである。Also, unlike the conventional example, since the level switch is not used, there is no oil movement due to its malfunction, and the hydraulic pressure level can be made uniform accurately, and since no operating member such as the level switch is used, there is also a problem of failure. It also has excellent durability.
【図面の簡単な説明】 第1図は本発明油面レベル制御装置の第1実施例を示す
配管系統図、第2図乃至第8図は第2実施例乃至第8実
施例の配管系統図、第9図は本発明油分離器の実施例を
示す概略断面図、第10図は従来例を示す配管系統図であ
る。 (10a)(10b)(10c)……圧縮機 (11a)(11b)(11c)……油分離器 (12)……分離器本体 (13)……分離要素 (14)……入口室 (15)……出口室 (16)……吐出ガス入口管 (17)……吐出ガス出口管 (19)……吐出管 (20a)(20b)(20c)……オーバーフローポート (21a)(21b)(21c)……中間圧力部 (22a)(22b)(41a)(41b)(41c)……注油管 (26a)(26b)(26c)……吸入管BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a piping system diagram showing a first embodiment of an oil level control device of the present invention, and FIGS. 2 to 8 are piping system diagrams of second to eighth embodiments. FIG. 9 is a schematic sectional view showing an embodiment of the oil separator of the present invention, and FIG. 10 is a piping system diagram showing a conventional example. (10a) (10b) (10c) …… Compressor (11a) (11b) (11c) …… Oil separator (12) …… Separator body (13) …… Separation element (14) …… Inlet chamber ( 15) …… Outlet chamber (16) …… Discharge gas inlet pipe (17) …… Discharge gas outlet pipe (19) …… Discharge pipe (20a) (20b) (20c) …… Overflow port (21a) (21b) (21c) …… Intermediate pressure part (22a) (22b) (41a) (41b) (41c) …… Lubrication pipe (26a) (26b) (26c) …… Suction pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 増田 潔 大阪府摂津市西一津屋1番1号 ダイキン 工業株式会社淀川製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Masuda 1-1, Nishiichitsuya, Settsu-shi, Osaka Daikin Industry Co., Ltd. Yodogawa Works
Claims (5)
b)を備え、これら圧縮機(10a,10b)に対応してそれぞ
れ各別に油分離器(11a,11b)を設けた冷凍装置におけ
る前記油分離器(11a,11b)の油面レベル制御装置であ
って、前記各油分離器(11a,11b)の適正油面高さ位置
に、オーバーフローポート(20a,20b)を設けて、これ
らポート(20a,20b)を、該ポート(20a,20b)を設ける
油分離器(11a,11b)に対し低圧となる部位に接続した
ことを特徴とする油面レベル制御装置。1. A plurality of compressors (10a, 10a) capable of parallel operation.
b) and an oil level control device for the oil separator (11a, 11b) in a refrigeration system in which a separate oil separator (11a, 11b) is provided for each of the compressors (10a, 10b). Therefore, the overflow ports (20a, 20b) are provided at the proper oil surface height positions of the oil separators (11a, 11b), and these ports (20a, 20b) are connected to these ports (20a, 20b). An oil level control device, characterized in that the oil level control device is connected to a low pressure part of an oil separator (11a, 11b) provided.
フローポート(20a,20b)を、圧縮機(10a,10b)の中間
圧力部(21a,21b)に接続している請求項1記載の油面
レベル制御装置。2. The overflow port (20a, 20b) provided in each oil separator (11a, 11b) is connected to the intermediate pressure section (21a, 21b) of the compressor (10a, 10b). Oil level control device.
フローポート(20a,20b)を圧縮機(10a,10b)の吸入管
(26a,26b)に接続している請求項1記載の油面レベル
制御装置。3. The oil according to claim 1, wherein an overflow port (20a, 20b) provided in each oil separator (11a, 11b) is connected to a suction pipe (26a, 26b) of the compressor (10a, 10b). Surface level control device.
フローポート(20a,20b)を、圧縮機(10a,10b)の吐出
側に接続する凝縮器(32)の入口側に至る配管系に接続
する請求項1記載の油面レベル制御装置。4. A piping system which connects an overflow port (20a, 20b) provided in each oil separator (11a, 11b) to an inlet side of a condenser (32) which is connected to a discharge side of a compressor (10a, 10b). The oil level control device according to claim 1, which is connected to the oil level control device.
て、入口室(14)と出口室(15)とを区画し、前記入口
室(14)に吐出ガス入口管(16)と、前記出口管(15)
に吐出ガス管(17)をそれぞれ接続すると共に、前記分
離器本体(12)における適正油面高さ位置にオーバーフ
ローポート(20)を設けて、このオーバーフローポート
(20)を前記分離要素(13)の下流側に連通させたこと
を特徴とする油分離器。5. A separator body (12) is provided with a separating element (13) to divide an inlet chamber (14) and an outlet chamber (15) into the inlet chamber (14) and a discharge gas inlet pipe (16). ) And the outlet pipe (15)
A discharge gas pipe (17) is connected to each of them, and an overflow port (20) is provided at an appropriate oil surface height position in the separator body (12), and the overflow port (20) is connected to the separation element (13). An oil separator characterized by being communicated with the downstream side of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1290889A JPH0697038B2 (en) | 1989-01-20 | 1989-01-20 | Oil level controller and oil separator in refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1290889A JPH0697038B2 (en) | 1989-01-20 | 1989-01-20 | Oil level controller and oil separator in refrigeration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02196176A JPH02196176A (en) | 1990-08-02 |
| JPH0697038B2 true JPH0697038B2 (en) | 1994-11-30 |
Family
ID=11818456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1290889A Expired - Fee Related JPH0697038B2 (en) | 1989-01-20 | 1989-01-20 | Oil level controller and oil separator in refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0697038B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3478292B2 (en) * | 2002-05-28 | 2003-12-15 | ダイキン工業株式会社 | Compression mechanism of refrigeration system |
| KR20080032870A (en) | 2006-10-11 | 2008-04-16 | 엘지전자 주식회사 | Compressor oil recovery system and oil recovery method for multi air conditioner |
| KR101480546B1 (en) | 2007-10-25 | 2015-01-08 | 엘지전자 주식회사 | Air conditioner |
| WO2010116388A1 (en) * | 2009-04-06 | 2010-10-14 | Refcomp Spa | Screw compressor specially suitable to be connected in parallel in compression units |
-
1989
- 1989-01-20 JP JP1290889A patent/JPH0697038B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02196176A (en) | 1990-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |