JPH0484073A - Freezer device - Google Patents
Freezer deviceInfo
- Publication number
- JPH0484073A JPH0484073A JP19950890A JP19950890A JPH0484073A JP H0484073 A JPH0484073 A JP H0484073A JP 19950890 A JP19950890 A JP 19950890A JP 19950890 A JP19950890 A JP 19950890A JP H0484073 A JPH0484073 A JP H0484073A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- oil
- compressors
- operated
- pipe
- 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
Links
- 238000005057 refrigeration Methods 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 60
- 239000007788 liquid Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- 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
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は個別運転可能な圧縮機を複数個備えた冷凍装置
に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigeration system equipped with a plurality of individually operable compressors.
（ロ）従来の技術
従来この種の冷凍装置が示きれたものとして実公昭６２
−４０１３４号公報がある。(b) Conventional technology This type of refrigeration equipment was first demonstrated in 1983.
There is a publication No.-40134.
この内容は個別運転可能な圧縮機を複数個備え、この夫
々の圧縮機の吐出管をつないで共通の吐出管を形成し、
この共通の吐出管に油分離器を設けて、各圧縮機から吐
出された冷媒中の潤滑油（以下「油」という。）をこの
冷媒から分離して油戻し管を介して夫々の圧縮機へ戻す
ようにしたものである。This includes multiple compressors that can be operated individually, and the discharge pipes of each compressor are connected to form a common discharge pipe.
An oil separator is provided in this common discharge pipe to separate the lubricating oil (hereinafter referred to as "oil") in the refrigerant discharged from each compressor from this refrigerant, and to send it to each compressor via an oil return pipe. It was designed to return to .
そして、夫々の圧縮機を同時に運転させた時、これら圧
縮機内の油面を略均−に保ってこれら夫々の圧縮機の油
切れ運転を防止する。When the respective compressors are operated simultaneously, the oil levels within these compressors are kept approximately equal to prevent the respective compressors from running out of oil.
（ハ）発明が解決しようとする課題
ここで、この冷凍装置において一方の圧縮機のみ運転（
個別運転）させた場合は、前述の均油管によって次のよ
うな不具合が生ずるおそれがある。(c) Problem to be solved by the invention Here, in this refrigeration system, only one compressor is operated (
If individual operation is performed, the following problems may occur due to the above-mentioned oil equalizing pipe.
すなわち、運転中の圧縮機の内部の圧力は、停止中の圧
縮機の内部の圧力よりも低くなる。このため、停止中の
圧縮機内の油は均油管を介して運転中の圧縮機内に引き
込まれ、この停止中の圧縮機内の油が減少する。従って
、停止中の圧縮機を運転させると、油切れが生じること
が考えられる。That is, the pressure inside the compressor during operation is lower than the pressure inside the compressor when it is stopped. Therefore, the oil in the stopped compressor is drawn into the operating compressor through the oil equalizing pipe, and the oil in the stopped compressor decreases. Therefore, if a stopped compressor is operated, oil may run out.
本発明は、個別運転可使な複数個の圧縮機同志の油のバ
ランスを保って油切れ運転を生じにくくすることを目的
としたものである。An object of the present invention is to maintain oil balance in a plurality of compressors that can be operated individually, thereby making it difficult to run out of oil.
（ニ）課題を解決するだめの手段
この目的を達成するために、本発明は個別運転可使な圧
縮機を複数個備え、これら圧縮機には油分離器からの油
を戻す油戻し管を夫々設け、又これら圧縮機を均油管で
つなぐと共に、この油戻し管には圧縮機の個別運転時に
油分離器から分離された油をまず停止中の圧縮機に導び
く制御弁を設けるようにしたものである。(d) Means for Solving the Problems In order to achieve this object, the present invention includes a plurality of compressors that can be operated individually, and these compressors are equipped with oil return pipes that return oil from the oil separator. In addition, these compressors are connected by an oil equalizing pipe, and a control valve is provided in this oil return pipe to first guide the oil separated from the oil separator to the stopped compressor when the compressors are individually operated. This is what I did.
（９作用
圧縮機の個別運転時に油戻し管の制御弁を開放すること
により、油分離器からの油はまず油戻し管を介して停止
中の圧縮機に導びかれ、その後この停止中の圧縮機内に
導びかれた油は均圧管を介して運転中の圧縮機に流れ込
む。(By opening the control valve of the oil return pipe during individual operation of the 9-action compressor, the oil from the oil separator is first led to the stopped compressor via the oil return pipe, and then to the stopped compressor. The oil introduced into the compressor flows into the operating compressor via a pressure equalization pipe.
（へ）実施例
図面において、１は第１のスクロール圧縮機（以下１第
１の圧縮機、という。）、２は第２のスクロール圧縮機
（以下「第２の圧縮機」という。）で、これら円圧縮機
は並列に配置されている。そして、これら夫々の圧縮機
１，２の吐出管３．４は共通の吐出管５につながれてい
る。６はこの共通の吐出管につながれた油分離器、７は
この油分離器から延びた油戻し管で、その先端は第１の
圧縮機１につながる第１分岐管８と、第２の圧縮機２に
つながる第２の分岐管９とに分岐されている。１０は第
１分岐管８に設けられた第１制御弁、１１は第２分岐管
９に設けられた第２制御弁である。この２つの制御弁１
０．１１の動作は後述する。１２は均油管で、第１の圧
縮機１と第２の圧縮機２とをつなぐ。１３は均圧管で、
第１の圧縮機１のオイルケース（図示せず）と第２の圧
縮機２０オイルケース（図示せず）とをつなぐ。１４は
凝縮器、１５はこの凝縮器内の冷媒を冷却する送風機、
１６は受液器、１７は膨張弁、１８は蒸発器、１９は気
液分離器でこれら機器により冷凍装置２０が構成されて
いる。この蒸発器１８はコンビニエンスストアーやスー
ハーマーケットなどにおける冷凍・冷蔵ショーケースや
、プレハブ冷凍・冷蔵庫に収納される。(f) In the drawings, 1 is a first scroll compressor (hereinafter referred to as 1 first compressor), and 2 is a second scroll compressor (hereinafter referred to as "second compressor"). , these circular compressors are arranged in parallel. The discharge pipes 3.4 of these compressors 1 and 2 are connected to a common discharge pipe 5. 6 is an oil separator connected to this common discharge pipe, 7 is an oil return pipe extending from this oil separator, and its tip is connected to a first branch pipe 8 connected to the first compressor 1 and a second compressor. It is branched into a second branch pipe 9 that connects to the machine 2. 10 is a first control valve provided in the first branch pipe 8, and 11 is a second control valve provided in the second branch pipe 9. These two control valves 1
The operation of 0.11 will be described later. 12 is an oil equalizing pipe that connects the first compressor 1 and the second compressor 2. 13 is a pressure equalizing pipe,
The oil case (not shown) of the first compressor 1 and the oil case (not shown) of the second compressor 20 are connected. 14 is a condenser; 15 is a blower that cools the refrigerant in the condenser;
Reference numeral 16 is a liquid receiver, 17 is an expansion valve, 18 is an evaporator, and 19 is a gas-liquid separator. These devices constitute a refrigeration system 20. This evaporator 18 is housed in a freezer/refrigerator showcase in a convenience store, Suha Market, etc., or a prefabricated freezer/refrigerator.
そして、この冷凍装置２０は冷凍用か冷蔵用か、すなわ
ち負荷によって第１の圧縮機１のみあるいは第２の圧縮
機２のみの個別運転、あるいは円圧縮機１，２の同時運
転が行なわれる。ここで夫々の運転時における２つの制
御弁１０．１１の動作は次に示すとおりである。The refrigeration system 20 is used for freezing or refrigeration, that is, depending on the load, only the first compressor 1 or only the second compressor 2 is operated individually, or the circular compressors 1 and 2 are operated simultaneously. The operations of the two control valves 10, 11 during each operation are as follows.
まず第１の圧縮機１と第２の圧縮機２とを同時に運転き
せる時は、第１並びに第２制御弁１０゜１１を開放する
。そして、円圧縮機１０．１１から吐出きれた冷媒は実
線矢印のように流れる。ここで夫々の圧縮機１，２から
吐出された冷媒中の油は油分離器６に貯溜される。そし
て、第１並びに第２制御弁１０．１１の開放によって第
１並びに第２分岐管８，９を介して夫々の圧縮機１，２
に回収される（−点鎖線矢印参照）。First, when the first compressor 1 and the second compressor 2 are to be operated simultaneously, the first and second control valves 10 and 11 are opened. The refrigerant completely discharged from the circular compressors 10 and 11 flows as shown by the solid arrow. Here, oil in the refrigerant discharged from the respective compressors 1 and 2 is stored in an oil separator 6. By opening the first and second control valves 10.11, the compressors 1 and 2 are connected via the first and second branch pipes 8 and 9.
(see - dotted chain arrow).
この同時運転時に、仮に両者の圧縮！１ 、２内の圧力
に差が生じたとしても均圧管１３によってこの両者の圧
力差はなくなり、油の量（オイルレベル）の安定化を計
ることができる。例えば、第１の圧縮機１内の圧力が、
第２の圧縮機２内の圧力よりも高くなった場合は、第１
の圧縮機１の圧力が均圧管１３を介して第２の圧縮機２
に移動し、この両者の圧力差をなくして、これによって
両者の圧縮機１，２の圧力が均一化され、この円圧縮機
におけるオイルレベルが所定の量に保たれる。During this simultaneous operation, both compression! Even if there is a difference in pressure between the two, the pressure equalization pipe 13 eliminates the pressure difference between the two, making it possible to stabilize the amount of oil (oil level). For example, the pressure inside the first compressor 1 is
If the pressure inside the second compressor 2 becomes higher than the pressure inside the first
The pressure of the compressor 1 is transferred to the second compressor 2 via the pressure equalizing pipe 13.
The pressure difference between the two compressors 1 and 2 is thereby equalized, and the oil level in the circular compressors is maintained at a predetermined level.
次に第１の圧縮機１もしくは第２の圧縮機２のいずれか
を運転（例えば第１の圧縮機１０個別運転）させる時は
第２制御弁１１を開放する。そして第１の圧縮機１のみ
運転させて、第１の圧縮機１から吐出きれた冷媒をまず
油分離器６へ送り込む。ここで、第１の圧縮機１から吐
出きれた冷媒中の油は油分離器６に貯溜される。そして
、第２制御弁１１の開放によって油分離器６中の油は第
２分岐管９を介してまず停止中の第２の圧縮機２に流れ
込む。そしてこの第２の圧縮機２に流れ込んだ油は均油
管１２を介して運転中の第１の圧縮機１に導びかれる（
破線矢印参照）。この時、均圧管１３によって第１並び
に第２の圧縮機１，２はつながれているため、内圧縮機
１，２内の圧力差は生じにくく、油の急激な移動（油が
停止中の第２の圧縮機２から運転中の第１の圧縮機１へ
急激に移動すること）は未然に防止できる。Next, when operating either the first compressor 1 or the second compressor 2 (for example, operating the first compressor 10 individually), the second control valve 11 is opened. Then, only the first compressor 1 is operated, and the refrigerant completely discharged from the first compressor 1 is first sent to the oil separator 6. Here, the oil in the refrigerant completely discharged from the first compressor 1 is stored in the oil separator 6. When the second control valve 11 is opened, the oil in the oil separator 6 first flows into the stopped second compressor 2 via the second branch pipe 9. The oil that has flowed into the second compressor 2 is led to the operating first compressor 1 via the oil equalizing pipe 12 (
(see dashed arrow). At this time, since the first and second compressors 1 and 2 are connected by the pressure equalizing pipe 13, pressure differences within the inner compressors 1 and 2 are unlikely to occur, and rapid movement of oil (when the oil is stopped) sudden movement from the second compressor 2 to the operating first compressor 1) can be prevented.
このように、個別運転時は、油分離器６中の油をまず停
止中の圧縮機へ導びき、次に運転中の圧縮機へ流すよう
にしたので、停止中の圧縮機内における池内への冷媒の
寝込みやオイル上りを防止できる。尚、上述した説明は
第１の圧縮機１の個別運転時について述べたが、第２の
圧縮機２の個別運転時の各制御弁１０．１１の動きは上
述の表に示したので、この時の冷媒の流れの説明は省略
し、油の流れのみ２点鎖線矢印で示した。In this way, during individual operation, the oil in the oil separator 6 is first guided to the stopped compressor, and then flows to the operating compressor, so that the oil in the pond inside the stopped compressor is reduced. Prevents refrigerant stagnation and oil build-up. Although the above explanation was given regarding the individual operation of the first compressor 1, the movements of each control valve 10 and 11 when the second compressor 2 is operated individually are shown in the table above, so this The explanation of the flow of the refrigerant at the time is omitted, and only the flow of the oil is shown by the two-dot chain arrow.
又、第１の圧縮機１並びに第２の圧縮機２の同時停止時
には第１並びに第２制御弁１０．１１は閉じられる。そ
して、これら圧縮機１，２の個別並びに同時運転時に生
じた圧縮機内の圧力差は均圧管１３によって少なくなる
。Further, when the first compressor 1 and the second compressor 2 are simultaneously stopped, the first and second control valves 10.11 are closed. The pressure difference within the compressors that occurs when the compressors 1 and 2 are operated individually and simultaneously is reduced by the pressure equalizing pipe 13.
（ト〉発明の効果
以上述べたように本発明は、圧縮機の個別運転時に油戻
し管の制御弁を開放することにより、油分離器からの油
をまず油戻し管を介して停止中の圧縮機に導びき、その
後運転中の圧縮機へ流すようにしたものである。(G) Effects of the Invention As described above, the present invention allows oil from the oil separator to be first passed through the oil return pipe to the stoppage by opening the control valve of the oil return pipe during individual operation of the compressor. It is introduced into the compressor and then flows into the operating compressor.
これによって運転停止中の圧縮機の油量を保って、この
停止中の圧縮機を油切れ運転とならないように運転させ
ることができる。しかもこの停止中の圧縮機内の油は油
分離器から常に供給されるため冷媒の寝込みを防止でき
る。As a result, the amount of oil in the compressor that is not operating can be maintained, and the compressor that is not operating can be operated without running out of oil. Moreover, since the oil in the compressor is constantly supplied from the oil separator while the compressor is stopped, it is possible to prevent refrigerant from stagnation.
図面は本発明の実施例を示す冷媒回路図である。
１．２・・・圧縮機、 ５・・・共通の吐出管、 ６・
・・油分離器、 ７・・・油戻し管、
弁、 １２・・・均油管。
１０．１１・・・制御The drawing is a refrigerant circuit diagram showing an embodiment of the present invention. 1.2...Compressor, 5...Common discharge pipe, 6.
...Oil separator, 7...Oil return pipe, valve, 12...Oil equalizing pipe. 10.11...Control
Claims (1)
縮機の吐出管をつないだ共通の吐出管に油分離器を設け
ると共に、この油分離器に前記夫々の圧縮機へ接続され
る油戻し管を設け、前記複数個の圧縮機同志を均油管で
つないだ冷凍装置において、この油戻し管には前記複数
個の圧縮機の個別運転時に、前記油分離器からの油を停
止中の圧縮機へ導びくための制御弁を設けたことを特徴
とする冷凍装置。1) Equipped with a plurality of compressors that can be operated individually, an oil separator is provided in a common discharge pipe connecting the discharge pipes of each compressor, and the oil separator is connected to each of the compressors. In a refrigeration system in which an oil return pipe is provided and the plurality of compressors are connected to each other by an oil equalizing pipe, the oil return pipe is provided with oil from the oil separator when the plurality of compressors are individually operated. A refrigeration system characterized by being provided with a control valve for guiding the air to a compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19950890A JPH0484073A (en) | 1990-07-26 | 1990-07-26 | Freezer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19950890A JPH0484073A (en) | 1990-07-26 | 1990-07-26 | Freezer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0484073A true JPH0484073A (en) | 1992-03-17 |
Family
ID=16408986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19950890A Pending JPH0484073A (en) | 1990-07-26 | 1990-07-26 | Freezer device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0484073A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100357108B1 (en) * | 2000-04-11 | 2002-10-19 | 엘지전자 주식회사 | air conditioner having two compressor |
| JP2007285674A (en) * | 2006-04-20 | 2007-11-01 | Daikin Ind Ltd | Refrigerating appliance |
| WO2008108518A2 (en) | 2007-03-02 | 2008-09-12 | Lg Electronics Inc. | Air conditioner and control method thereof |
| US7966903B2 (en) | 2007-06-08 | 2011-06-28 | Denso Corporation | Shift range control apparatus |
| WO2023195042A1 (en) * | 2022-04-04 | 2023-10-12 | 三菱電機株式会社 | Refrigeration cycle device |
-
1990
- 1990-07-26 JP JP19950890A patent/JPH0484073A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100357108B1 (en) * | 2000-04-11 | 2002-10-19 | 엘지전자 주식회사 | air conditioner having two compressor |
| JP2007285674A (en) * | 2006-04-20 | 2007-11-01 | Daikin Ind Ltd | Refrigerating appliance |
| WO2008108518A2 (en) | 2007-03-02 | 2008-09-12 | Lg Electronics Inc. | Air conditioner and control method thereof |
| EP2132498A2 (en) * | 2007-03-02 | 2009-12-16 | LG Electronics Inc. | Air conditioner and control method thereof |
| EP2132498A4 (en) * | 2007-03-02 | 2012-01-25 | Lg Electronics Inc | Air conditioner and control method thereof |
| US7966903B2 (en) | 2007-06-08 | 2011-06-28 | Denso Corporation | Shift range control apparatus |
| WO2023195042A1 (en) * | 2022-04-04 | 2023-10-12 | 三菱電機株式会社 | Refrigeration cycle device |
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