JPS6230693Y2 - - Google Patents
Info
- Publication number
- JPS6230693Y2 JPS6230693Y2 JP1981093393U JP9339381U JPS6230693Y2 JP S6230693 Y2 JPS6230693 Y2 JP S6230693Y2 JP 1981093393 U JP1981093393 U JP 1981093393U JP 9339381 U JP9339381 U JP 9339381U JP S6230693 Y2 JPS6230693 Y2 JP S6230693Y2
- Authority
- JP
- Japan
- Prior art keywords
- stage compressor
- gas
- liquid
- refrigeration cycle
- refrigerant
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims 2
- 239000003507 refrigerant Substances 0.000 description 19
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Description
【考案の詳細な説明】
この考案は低段側圧縮機と高段側圧縮機を備え
た多段圧縮冷凍サイクルに関する。[Detailed Description of the Invention] This invention relates to a multi-stage compression refrigeration cycle equipped with a low-stage compressor and a high-stage compressor.
従来における多段圧縮冷凍サイクルは、第１図
に示した構成のものが一般的である。すなわち、
低段側圧縮機１の吐出側をエコノマイザ２を介し
て高段側圧縮機３の吸込側に接続し、この吐出側
を凝縮器４に接続するとともに、この凝縮器４を
気液分離器５、主膨張弁６を介して蒸発器７に接
続して冷凍サイクルを構成している。さらに、上
記気液分離器５を中途部に膨張弁８を有したバイ
パス管９を介してエコノマイザ２に接続してい
る。 A conventional multi-stage compression refrigeration cycle generally has the configuration shown in FIG. That is,
The discharge side of the low-stage compressor 1 is connected to the suction side of the high-stage compressor 3 via the economizer 2, and this discharge side is connected to the condenser 4, and the condenser 4 is connected to the gas-liquid separator 5. , are connected to an evaporator 7 via a main expansion valve 6 to form a refrigeration cycle. Further, the gas-liquid separator 5 is connected to the economizer 2 via a bypass pipe 9 having an expansion valve 8 in the middle.
このように構成された多段圧縮冷凍サイクル
は、低段側圧縮機１から吐出された高温ガスをエ
コノマイザ２によつて飽和圧力温度まで冷却し、
その後高段側圧縮機３に導びかれる。 The multi-stage compression refrigeration cycle configured in this way cools high-temperature gas discharged from the low-stage compressor 1 to a saturation pressure temperature by the economizer 2,
Thereafter, it is guided to the high-stage compressor 3.
しかしながら、エコノマイザはかなり大形のも
のが必要になり、冷凍機の大形化とコストアツプ
の原因になつている。 However, the economizer needs to be quite large, leading to an increase in the size and cost of the refrigerator.
また、特開昭51−97849号公報に示すように、
ロータリ式２段圧縮機において、低段側圧縮機に
液冷媒を注入して冷却するものも知られている
が、シリンダの内部で冷媒ガスの凝縮が発生する
虞れがあり、吐出弁の損傷事故を招くことがあ
る。また、主吸込管へのシリンダ内のガス冷媒が
逆流を生じ、圧縮機体積効率が低下して圧縮能力
を損うことがある。 In addition, as shown in Japanese Patent Application Laid-Open No. 51-97849,
Some rotary two-stage compressors are known to cool the lower-stage compressor by injecting liquid refrigerant, but there is a risk of condensation of refrigerant gas inside the cylinder, causing damage to the discharge valve. This may lead to an accident. In addition, the gas refrigerant in the cylinder toward the main suction pipe may backflow, reducing compressor volumetric efficiency and impairing compression capacity.
この考案は上記事情に着目してなされたもの
で、その目的とするところは、高段側圧縮機に液
インジエクシヨンポートを設け、液冷媒をインジ
エクシヨンすることにより、従来のようにエコノ
マイザを使用することなく冷却でき、小形化と能
力向上を図ることができる多段圧縮冷凍サイクル
を提供しようとするものである。 This idea was devised in view of the above circumstances, and its purpose was to provide a liquid injection port in the high-stage compressor and inject the liquid refrigerant, thereby allowing the economizer to be used as before. The present invention aims to provide a multistage compression refrigeration cycle that can perform cooling without any turbulence, and can be made smaller and have improved capacity.
以下、この考案を図面に示す一実施例にもとづ
いて説明する。図中１１はロータリ式の低段側圧
縮機で、この吐出口１２は同じくロータリ式の高
段側圧縮機１３の吸込口１４に接続されている。
この高段側圧縮機１３の吐出口１５は凝縮器１６
を介して気液分離器１７に接続されており、この
気液分離器１７は主減圧器１８を介して蒸発器１
９に接続されている。そして、この蒸発器１９の
出口側は上記低段側圧縮機１１の吸込口２０に接
続され、多段圧縮冷凍サイクル２１を構成してい
る。さらに、上記高段側圧縮機１３のシリンダに
は液インジエクシヨンポート２２が設けられ、こ
の液インジエクシヨンポート２２と気液分離器１
７とは中途部にキヤピラリチユーブ２３を有する
液インジエクシヨン回路２４を介して接続されて
いる。 This invention will be explained below based on an embodiment shown in the drawings. In the figure, reference numeral 11 denotes a rotary type low stage compressor, and its discharge port 12 is connected to a suction port 14 of a rotary type high stage compressor 13.
The discharge port 15 of this high-stage compressor 13 is connected to the condenser 16
The gas-liquid separator 17 is connected to the evaporator 1 through a main pressure reducer 18.
Connected to 9. The outlet side of this evaporator 19 is connected to the suction port 20 of the low-stage compressor 11, forming a multi-stage compression refrigeration cycle 21. Further, the cylinder of the high-stage compressor 13 is provided with a liquid injection exit port 22, and the liquid injection exit port 22 and the gas-liquid separator 1
7 through a liquid injection circuit 24 having a capillary tube 23 in the middle.
しかして、低段側圧縮機１１および高段側圧縮
機１３を起動すると、まず、低段側圧縮機１１か
ら吐出された高温高圧のガス冷媒は高段側圧縮機
１３に送り込まれ、ここで再圧縮されて吐出す
る。高段側圧縮機１３から吐出された高温高圧の
ガス冷媒は凝縮器１６に送り込まれ、ここで凝縮
液化される。この液冷媒は気液分離器１７、主減
圧器１８を順次流れて蒸発器１９において蒸発気
化されることになる。このとき、上記気液分離器
１７は液インジエクシヨン回路２４を介して高段
側圧縮機１３に接続されているため、液冷媒はキ
ヤピラリチユーブ２３によつて減圧されたのち高
段側圧縮機１３の液インジエクシヨンポート２２
からシリンダ内に強制注入（液インジエクシヨ
ン）される。したがつて、高段側圧縮機１３のシ
リンダ内で圧縮途中のガス冷媒と液インジエクシ
ヨンされた液冷媒とが直接熱交換され、低段側圧
縮機１１から吐出されたガス冷媒を冷却すること
ができる。また、この場合、高段側圧縮機１３は
圧縮途中で液冷媒がインジエクシヨンされるの
で、インジエクシヨン量の増加により蒸発器１９
を通過する液冷媒が減少することはなく、常に安
定した冷媒循環量を保つことができる。 When the low-stage compressor 11 and the high-stage compressor 13 are started, the high-temperature and high-pressure gas refrigerant discharged from the low-stage compressor 11 is first sent to the high-stage compressor 13. It is recompressed and discharged. The high-temperature, high-pressure gas refrigerant discharged from the high-stage compressor 13 is sent to the condenser 16, where it is condensed and liquefied. This liquid refrigerant flows sequentially through the gas-liquid separator 17 and the main pressure reducer 18, and is evaporated in the evaporator 19. At this time, since the gas-liquid separator 17 is connected to the high-stage compressor 13 via the liquid injection circuit 24, the liquid refrigerant is depressurized by the capillary tube 23 and then transferred to the high-stage compressor 13. liquid injection port 22
The liquid is forcibly injected (liquid injection) into the cylinder. Therefore, the gas refrigerant being compressed in the cylinder of the high-stage compressor 13 and the liquid refrigerant subjected to liquid injection exchange directly with each other to cool the gas refrigerant discharged from the low-stage compressor 11. can. In addition, in this case, since the liquid refrigerant is injected into the high-stage compressor 13 during compression, the evaporator 19
The amount of liquid refrigerant passing through the refrigerant does not decrease, and a stable refrigerant circulation amount can be maintained at all times.
なお、上記一実施例においては、冷房運転につ
いて述べたが、ヒートポンプ式冷凍サイクルを構
成し、凝縮器１６を暖房用の放熱器として利用す
る場合は、高段側圧縮機１３の有効循環冷媒量が
増加するので暖房能力が増加するという効果を奏
する。 In the above embodiment, cooling operation was described, but if a heat pump type refrigeration cycle is configured and the condenser 16 is used as a radiator for heating, the effective circulating refrigerant amount of the high-stage compressor 13 increases, so the effect is that the heating capacity increases.
この考案は以上説明したよように、低段側圧縮
機、高段側圧縮機を備えた多段圧縮冷凍サイクル
において、上記高段側圧縮機と気液分離器とを液
インジエクシヨン回路で接続したから、圧縮途中
のガス冷媒とインジエクシヨンされる液冷媒とが
直接熱交換され、従来のようにエコノマイザが不
要となり、冷凍機の小形化と蒸発器を通過する冷
媒流量の安定化を図ることができ、安価で同等レ
ベルの冷凍サイクルを構成できるという効果を奏
する。 As explained above, this idea is based on the fact that in a multi-stage compression refrigeration cycle equipped with a low-stage compressor and a high-stage compressor, the high-stage compressor and the gas-liquid separator are connected through a liquid injection circuit. , the gas refrigerant during compression and the liquid refrigerant being injected directly exchange heat, eliminating the need for an economizer as in the past, making it possible to downsize the refrigerator and stabilize the flow rate of refrigerant passing through the evaporator. The effect is that a refrigeration cycle of the same level can be constructed at a lower cost.
第１図は従来の冷凍サイクルを示す系統図、第
２図はこの考案の一実施例の冷凍サイクルを示す
系統図である。
１１……低段側圧縮機、１３……高段側圧縮
機、１６……凝縮器、１７……気液分離器、１８
……主減圧器（減圧器）、１９……蒸発器、２２
……液インジエクシヨンポート、２４……液イン
ジエクシヨン回路。
FIG. 1 is a system diagram showing a conventional refrigeration cycle, and FIG. 2 is a system diagram showing a refrigeration cycle according to an embodiment of this invention. 11...low stage compressor, 13...high stage compressor, 16...condenser, 17...gas-liquid separator, 18
...Main pressure reducer (pressure reducer), 19...Evaporator, 22
...Liquid injection port, 24...Liquid injection circuit.
Claims (1)
離器、減圧器および蒸発器を順次接続した多段圧
縮冷凍サイクルを構成し、上記高段側圧縮機に圧
縮途中のガス冷媒をインジエクシヨンする液イン
ジエクシヨンポートを設けるとともに、この液イ
ンジエクシヨンポートと上記気液分離器とを中途
部に減圧器を有する液インジエクシヨン回路で接
続したことを特徴とする多段圧縮冷凍サイクル。 A multi-stage compression refrigeration cycle is constructed in which a low-stage compressor, a high-stage compressor, a condenser, a gas-liquid separator, a pressure reducer, and an evaporator are sequentially connected. A multistage compression refrigeration cycle characterized in that a liquid injection extraction port for injection is provided, and the liquid injection extraction port and the gas-liquid separator are connected by a liquid injection circuit having a pressure reducer in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9339381U JPS58265U (en) | 1981-06-24 | 1981-06-24 | Multi-stage compression refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9339381U JPS58265U (en) | 1981-06-24 | 1981-06-24 | Multi-stage compression refrigeration cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58265U JPS58265U (en) | 1983-01-05 |
| JPS6230693Y2 true JPS6230693Y2 (en) | 1987-08-06 |
Family
ID=29888358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9339381U Granted JPS58265U (en) | 1981-06-24 | 1981-06-24 | Multi-stage compression refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58265U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61158730U (en) * | 1985-03-25 | 1986-10-01 | ||
| JP2001241780A (en) * | 2000-03-01 | 2001-09-07 | Mitsubishi Electric Corp | Refrigerating air conditioner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431385U (en) * | 1977-08-05 | 1979-03-01 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5167452U (en) * | 1974-11-25 | 1976-05-28 |
-
1981
- 1981-06-24 JP JP9339381U patent/JPS58265U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431385U (en) * | 1977-08-05 | 1979-03-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58265U (en) | 1983-01-05 |
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