JPH0539405Y2 - - Google Patents
Info
- Publication number
- JPH0539405Y2 JPH0539405Y2 JP1988063468U JP6346888U JPH0539405Y2 JP H0539405 Y2 JPH0539405 Y2 JP H0539405Y2 JP 1988063468 U JP1988063468 U JP 1988063468U JP 6346888 U JP6346888 U JP 6346888U JP H0539405 Y2 JPH0539405 Y2 JP H0539405Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- compressor
- oil separator
- suction side
- valve body
- 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 - Lifetime
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 8
- 239000003921 oil Substances 0.000 description 114
- 238000005057 refrigeration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Temperature-Responsive Valves (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、油分離器の油戻し装置に関するもの
である。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an oil return device for an oil separator.
（従来の技術）
一般に、冷凍装置においては、圧縮機からの吐
出ガス中に潤滑油等の油成分が含まれることとな
るが、該油成分の存在は、熱交換器の性能低下を
招くおそれがある。そこで、圧縮機の吐出側に油
成分を吐出ガス中から分離する油分離器を付設
し、該油分離器において分離された油を圧縮機の
吸入側へ返し戻すようにしたものが従来から良く
知られている（例えば、実開昭62−91168号公報
参照）。(Prior Art) Generally, in a refrigeration system, oil components such as lubricating oil are contained in the gas discharged from the compressor, but the presence of such oil components may lead to a decrease in the performance of the heat exchanger. There is. Therefore, conventionally, it has been better to attach an oil separator to the discharge side of the compressor to separate the oil component from the discharged gas, and return the oil separated in the oil separator to the suction side of the compressor. This is known (for example, see Japanese Utility Model Application Publication No. 62-91168).
（考案が解決しようとする課題）
上記公知例の場合、油分離器と圧縮機吸入側と
の間に電磁開閉弁を介設し、油上がり時に対応さ
せて電磁開閉弁の開閉制御を行うことによつて、
圧縮機への油の返し戻しを行うようにしている
が、構造が複雑化するとともに、コストアツプを
まぬがれ難いという不具合がある。また、実開昭
62−85876号公報に開示されているように、油分
離器と圧縮機吸入側との間にキヤピラリチユーブ
を介設するようにしたものも知られているが、こ
の場合、構造簡単で低コストではあるが、油上が
りのない時に、吐出ガスがバイパスしたり、吐出
ガス圧力に応じて油戻り量に違いが生じたりする
とともに、キヤピラリチユーブに油が詰まるおそ
れもある。つまり、構造簡単且つ低コストで、正
確な油戻り制御を行い得るような油戻し装置の開
発がまたれているのが現状である。(Problem to be solved by the invention) In the case of the above-mentioned known example, an electromagnetic on-off valve is interposed between the oil separator and the compressor suction side, and the opening/closing of the electromagnetic on-off valve is controlled in response to oil draining. According to
Although oil is returned to the compressor, there are problems in that the structure becomes complicated and it is difficult to avoid increasing costs. Also, Mikiakiaki
As disclosed in Publication No. 62-85876, a capillary tube is also known in which a capillary tube is interposed between the oil separator and the compressor suction side, but in this case, the structure is simple and low cost. Although this is a cost, there is a risk that the discharged gas may bypass when there is no oil coming up, or that the amount of oil returned varies depending on the discharged gas pressure, and that the capillary tube may become clogged with oil. In other words, there is currently a great deal of effort being made to develop an oil return device that has a simple structure, is low cost, and can perform accurate oil return control.
本考案は、上記の点に鑑みてなされたもので、
油分離器から圧縮機吸入側への油戻りを、極めて
簡易な手段により正確に制御し得るようにするこ
とを目的とするものである。 This invention was made in view of the above points,
The object of the present invention is to accurately control the return of oil from the oil separator to the suction side of the compressor using extremely simple means.
（課題を解決するための手段）
本考案では、上記課題を解決するための手段と
して、図面に示すように、圧縮機１からの吐出ガ
スＧ中に含まれる油Ｆを分離回収する油分離器２
と前記圧縮機１の吸入側との間に介設される油戻
し装置において、前記油分離器２から圧縮機１の
吸入側へ返し戻される油Ｆの通路となる本体８内
に、該本体内通路９を開閉する弁体１０と、該弁
体１０を閉弁方向に付勢し且つ前記油分離器２か
ら油Ｆのみが返し戻される場合には油温ｔを感知
してその時の圧縮機１の高低圧差Ｐより小さな付
勢力が得られ、前記油分離器２から油Ｆと吐出ガ
スＧとが返し戻される場合には吐出ガス温度t′を
感知してその時の圧縮機１の高低圧差Ｐより大き
な付勢力が得られる如き特性を有する形状記憶合
金製のスプリング１１とを配設している。(Means for Solving the Problems) In the present invention, as a means for solving the above problems, as shown in the drawings, an oil separator is installed to separate and recover the oil F contained in the discharge gas G from the compressor 1. 2
In the oil return device interposed between the oil separator 2 and the suction side of the compressor 1, a main body 8 that serves as a passage for the oil F returned from the oil separator 2 to the suction side of the compressor 1 is provided. A valve body 10 opens and closes the inner passage 9, and when the valve body 10 is biased in the valve closing direction and only oil F is returned from the oil separator 2, the oil temperature t is sensed and the compression is performed at that time. If a biasing force smaller than the pressure difference P of the compressor 1 is obtained and the oil F and discharged gas G are returned from the oil separator 2, the discharged gas temperature t' is sensed and the height of the compressor 1 at that time is determined. A spring 11 made of a shape memory alloy having a characteristic that a biasing force larger than the pressure difference P can be obtained is provided.
（作用）
本考案では、上記手段によつて次のような作用
が得られる。(Function) In the present invention, the following effects can be obtained by the above means.
即ち、油分離器２内に吐出ガスＧから分離され
た油Ｆが十分存在している際には、圧縮機１り吐
出ガスＧ（この時の吐出ガス温度＝t1′あるいは
t2′）から分離した油Ｆのみが油分離器２の本体
内通路９に返し戻されるため、該油温（＝t1ある
いはt2）を感知して得られるスプリング１１の付
勢力W1（あるいはW3）がその時における圧縮機
１の高低圧差Ｐよりも小さくされているところか
ら、弁体１０は開弁作動せしめられることとな
り、油分離器２からの油Ｆは本体内通路９を通つ
て圧縮機１の吸入側へ返し戻されることとなる。
そして、油分離器２内の油Ｆが少なくなつて、油
Ｆと吐出ガスＧとが一緒に油戻し装置６内に入つ
てくると、高温（＝t′あるいはt2′）の吐出ガスＧ
に触れてスプリング１１の付勢力が増大せしめら
れ、圧縮機１の高低圧差Ｐより大きくなつて弁体
１０は閉弁作動せしめられることとなり、圧縮機
１の吸入側への油の戻りは停止されることとな
る。従つて、油戻し装置６を介して吐出ガスＧの
バイパスが防止されることとなるのである。上記
作動を繰り返すことにより、圧縮機１の吸入側へ
の油戻し制御が行なわれるのである。しかも、圧
縮機１の吐出ガスＧの圧力に変動があつた場合で
あつても、形状記憶合金製のスプリング１１の付
勢力Ｗがその時の吐出ガスＧおよび油Ｆの温度
t′およびｔに対応して変化するところから、油分
離器２から圧縮機１の吸入側への油戻りが正確に
制御されるとともに、吐出ガスＧのバイパスが確
実に防止されることとなるのである。 That is, when there is sufficient oil F separated from the discharged gas G in the oil separator 2, the discharged gas G from the compressor 1 (discharged gas temperature at this time = t 1 ' or
Since only the oil F separated from t 2 ′) is returned to the passage 9 in the main body of the oil separator 2, the biasing force W 1 of the spring 11 obtained by sensing the oil temperature (=t 1 or t 2 ) (or W 3 ) is made smaller than the high-low pressure difference P of the compressor 1 at that time, the valve body 10 is operated to open, and the oil F from the oil separator 2 flows through the passage 9 in the main body. The air is then returned to the suction side of the compressor 1.
Then, when the oil F in the oil separator 2 becomes low and the oil F and the discharged gas G enter the oil return device 6 together, the discharged gas G at a high temperature (=t' or t2 ')
, the biasing force of the spring 11 is increased and becomes larger than the pressure difference P between the high and low pressures of the compressor 1, and the valve body 10 is operated to close, and the return of oil to the suction side of the compressor 1 is stopped. The Rukoto. Therefore, bypassing of the discharged gas G via the oil return device 6 is prevented. By repeating the above operations, oil return control to the suction side of the compressor 1 is performed. Moreover, even if the pressure of the discharged gas G of the compressor 1 fluctuates, the biasing force W of the shape memory alloy spring 11 is maintained at the temperature of the discharged gas G and oil F at that time.
From the fact that t′ and t change correspondingly, the return of oil from the oil separator 2 to the suction side of the compressor 1 is accurately controlled, and bypassing of the discharge gas G is reliably prevented. It is.
（実施例）
以下、添付の図面を参照して本考案の好適な実
施例を説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
本実施例の油戻し装置は、第１図図示の如く、
冷凍装置Ａにおける油分離器２と圧縮機１の吸入
側との間に介設されるものである。 The oil return device of this embodiment is as shown in FIG.
It is interposed between the oil separator 2 and the suction side of the compressor 1 in the refrigeration system A.
前記冷凍装置Ａは、圧縮機１、油分離器２、凝
縮器３、減圧機構として作用するキヤピラリチユ
ーブ４および蒸発器５を順次接続して構成されて
おり、圧縮機１から吐出された高圧冷媒ガスＧを
凝縮器３にて凝縮液化し、かくして得られた冷媒
液を蒸発器５にて蒸発せしめることにより、周囲
より熱を奪つて冷凍を行うように作用するように
なつている。 The refrigeration system A is configured by sequentially connecting a compressor 1, an oil separator 2, a condenser 3, a capillary tube 4 acting as a pressure reducing mechanism, and an evaporator 5, and the high pressure discharged from the compressor 1 is The refrigerant gas G is condensed and liquefied in the condenser 3, and the refrigerant liquid thus obtained is evaporated in the evaporator 5, thereby acting to remove heat from the surroundings and perform refrigeration.
前記油分離器２は、圧縮機１から吐出された冷
媒ガスＧ中に含まれる潤滑油等の油成分Ｆを分離
する如く作用するようになつている。 The oil separator 2 acts to separate oil components F such as lubricating oil contained in the refrigerant gas G discharged from the compressor 1.
しかして、前記油分離器２と圧縮機１の吸入側
との間には、油戻し装置６を備えた油戻し回路７
が介設されている。 An oil return circuit 7 equipped with an oil return device 6 is provided between the oil separator 2 and the suction side of the compressor 1.
is interposed.
前記油戻し装置６は、前記油分離器２から圧縮
機１の吸入側へ返し戻される油Ｆの通路９となる
本体８と、該本体内通路９を開閉する弁体１０
と、該弁体１０を閉弁方向に付勢する形状記憶合
金製のスプリング１１とを備えている。前記本体
内通路９には、弁体１０により開閉される弁シー
ル部１２が形成されている。 The oil return device 6 includes a main body 8 that serves as a passage 9 for the oil F returned from the oil separator 2 to the suction side of the compressor 1, and a valve body 10 that opens and closes the internal passage 9.
and a shape memory alloy spring 11 that biases the valve body 10 in the valve closing direction. A valve seal portion 12 that is opened and closed by a valve body 10 is formed in the main body passage 9 .
前記スプリング１１は、第２図図示の如く、温
度ｔの変化に対応してバネ荷重（換言すれば、付
勢力）Ｗが増大するバネ特性を有している。例え
ば、圧縮機１の吐出ガス圧力が低い時（即ち、圧
縮機１の高低圧差＝P1）における油温度t1および
吐出ガス温度t1においてはバネ荷重W1およびW2
を示し、圧縮機１の吐出ガス圧力が高い時（圧縮
機１の高低圧差＝P2）における油温度t2および吐
出ガス温度t2においてはバネ荷重W3およびW4を
示すようになつている。ここで、W1＜P1＜W2、
W3＜P2＜W4となるように設定されている。つま
り、本実施例におけるスプリング１１は、前記油
分離器２から油Ｆのみが本体内通路９に返し戻さ
れる場合には油温（t1あるいはt2）を感知してそ
の時の圧縮機１の高低圧差（P1あるいはP2）よ
り小さな付勢力（W1あるいはW3）が得られ、油
Ｆと吐出ガスＧとが本体内通路９に返し戻される
場合には吐出ガス温度（t1′あるいはt2）を感知
してその時の圧縮機１の高低圧差（P2あるいは
P4）より大きな付勢力（W2あるいはW4）が得ら
れる如き特性を有するように設定されているので
ある。 As shown in FIG. 2, the spring 11 has a spring characteristic in which the spring load (in other words, urging force) W increases in response to changes in temperature t. For example, when the discharge gas pressure of the compressor 1 is low (that is, the pressure difference between high and low pressures of the compressor 1 = P 1 ) and the oil temperature t 1 and the discharge gas temperature t 1 , the spring loads W 1 and W 2 are
, and the spring loads W 3 and W 4 are shown at oil temperature t 2 and discharge gas temperature t 2 when the discharge gas pressure of compressor 1 is high (high and low pressure difference of compressor 1 = P 2 ). There is. Here, W 1 <P 1 <W 2 ,
It is set so that W 3 < P 2 < W 4 . In other words, the spring 11 in this embodiment senses the oil temperature (t 1 or t 2 ) when only the oil F is returned from the oil separator 2 to the passage 9 in the main body, and adjusts the temperature of the compressor 1 at that time. If a biasing force (W 1 or W 3 ) smaller than the high-low pressure difference (P 1 or P 2 ) is obtained and the oil F and discharged gas G are returned to the passage 9 in the main body, the discharged gas temperature (t 1 ' or t 2 ) and detect the high-low pressure difference (P 2 or
P 4 ) is set to have such a characteristic that a larger biasing force (W 2 or W 4 ) can be obtained.
なお、図面中、符号１３は弁体１０を閉弁方向
に復帰させるためのバイアススプリングである。 In the drawings, reference numeral 13 is a bias spring for returning the valve body 10 to the valve closing direction.
ついで、図示の油戻し装置の作用を説明する。 Next, the operation of the illustrated oil return device will be explained.
圧縮機１の吐出ガスＧの圧力が低い時（即ち、
圧縮機１の高低圧差＝P1、この時の吐出ガス温
度＝t1′には、吐出ガスＧから分離された油Ｆの
温度t1も低くなるが、その時に得られるスプリン
グ１１の付勢力W1が圧縮機１の高低圧差P1より
も小さくされているところから、弁体１０は開弁
作動せしめられることとなり、油分離器２からの
油Ｆは本体内通路９を通つて圧縮機１の吸入側へ
返し戻されることとなる。そして、油分離器２内
の油Ｆが少なくなつて、油Ｆと吐出ガスＧとが一
緒に油戻し装置６内に入つてくると、高温（＝
t1′）の吐出ガスＧに触れてスプリング１１の付
勢力がW2に増大せしめられ、圧縮機１の高低圧
差P1より大きくなつて弁体１０は閉弁作動せし
められることとなり、圧縮機１の吸入側への油の
戻りは停止されることとなる。従つて、油戻し回
路７を介しての吐出ガスＧのバイパスが防止され
ることとなるのである。上記作動を繰り返すこと
により、圧縮機１の吸入側への油戻し制御が行な
われるのである。 When the pressure of the discharge gas G of the compressor 1 is low (i.e.
When the pressure difference between the high and low pressures of the compressor 1 = P 1 and the discharge gas temperature at this time = t 1 ', the temperature t 1 of the oil F separated from the discharge gas G also decreases, but the biasing force of the spring 11 obtained at that time Since W 1 is smaller than the pressure difference P 1 of the compressor 1, the valve body 10 is operated to open the valve, and the oil F from the oil separator 2 passes through the passage 9 in the main body to the compressor. It will be returned to the suction side of No. 1. Then, when the oil F in the oil separator 2 decreases and the oil F and the discharged gas G enter the oil return device 6 together, the temperature becomes high (=
The biasing force of the spring 11 is increased to W 2 by contact with the discharged gas G of t 1 ′), and the pressure difference between the high and low pressures of the compressor 1 becomes greater than P 1 , and the valve body 10 is operated to close, causing the compressor to close. The return of oil to the suction side of No. 1 will be stopped. Therefore, bypassing of the discharged gas G via the oil return circuit 7 is prevented. By repeating the above operations, oil return control to the suction side of the compressor 1 is performed.
一方、圧縮機の吐出ガスＧの圧力が高い時（即
ち、圧縮機１の高低圧差＝P2、この時の吐出ガ
ス温度＝t2′）には、吐出ガスＧから分離された
油Ｆの温度t2も高くなるが、その時に得られるス
プリング１１の付勢力W3が圧縮機１の高低圧差
P2よりも小さくされているところから、弁体１
０は開弁作動せしめられることとなり、油分離器
２からの油Ｆは本体内通路９を通つて圧縮機１の
吸入側へ返し戻されることとなる。そして、油分
離器２内の油Ｆが少なくなつて、油Ｆと吐出ガス
Ｇとが一緒に油戻し装置６内に入つてくると、高
温（＝t2′）の吐出ガスＧに触れてスプリング１
１の付勢力がW4に増大せしめられ、圧縮機１の
高低圧差P2より大きくなつて弁体１０は閉弁作
動せしめられることとなり、圧縮機１の吸入側へ
の油の戻りは停止されることとなる。従つて、油
戻し回路７を介しての吐出ガスＧのバイパスが防
止されることとなるのである。上記作動を繰り返
すことにより、圧縮機１の吸入側への油戻し制御
が行なわれるのである。 On the other hand, when the pressure of the discharge gas G of the compressor is high (that is, the pressure difference between the high and low pressures of the compressor 1 = P 2 , and the discharge gas temperature at this time = t 2 '), the oil F separated from the discharge gas G is The temperature t2 also increases, but the biasing force W3 of the spring 11 obtained at that time increases the pressure difference between the high and low pressures of the compressor 1.
Since it is smaller than P 2 , valve body 1
0 will be operated to open the valve, and the oil F from the oil separator 2 will be returned to the suction side of the compressor 1 through the passage 9 in the main body. When the oil F in the oil separator 2 becomes low and the oil F and the discharged gas G enter the oil return device 6 together, the oil F and the discharged gas G come into contact with the high temperature (=t 2 ') discharged gas G. Spring 1
1 is increased to W4 , which becomes greater than the high-low pressure difference P2 of the compressor 1, and the valve body 10 is operated to close, and the return of oil to the suction side of the compressor 1 is stopped. The Rukoto. Therefore, bypassing of the discharged gas G via the oil return circuit 7 is prevented. By repeating the above operations, oil return control to the suction side of the compressor 1 is performed.
上記した如く、本実施例によれば、油戻し装置
６における弁体１０は、吐出ガス圧力および吐出
ガス温度が変化したとしても、油Ｆの流通時には
開作動せしめられ、吐出ガス流通時には閉作動せ
しめられることとなり、確実且つ正確な油戻し制
御がなされることとなつているのである。しか
も、弁体１０と形状記憶合金製のスプリング１１
とからなつており、構造簡易且つ低コストとな
る。 As described above, according to this embodiment, the valve body 10 in the oil return device 6 is operated to open when the oil F is flowing, and to close when the discharged gas is flowing, even if the discharge gas pressure and the discharge gas temperature change. Therefore, reliable and accurate oil return control is to be performed. Moreover, the valve body 10 and the spring 11 made of shape memory alloy
The structure is simple and low cost.
本考案は、上記実施例の構成に限定されるもの
ではなく、考案の要旨を逸脱しない範囲において
適宜設計変更可能なことは勿論である。 It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be modified as appropriate without departing from the gist of the invention.
（考案の効果）
叙上の如く、本考案によれば、圧縮機１からの
吐出ガスＧ中に含まれる油Ｆを分離回収する油分
離器２と前記圧縮機１の吸入側との間に介設され
る油戻し装置において、前記油分離器２から圧縮
機１の吸入側へ返し戻される油Ｆの通路となる本
体８内に、該本体内通路９を開閉する弁体１０
と、該弁体１０を閉弁方向に付勢し且つ前記油分
離器２から油Ｆのみが返し戻される場合には前記
圧縮機１の高低圧差Ｐより小さな付勢力が得ら
れ、前記油分離器２から油Ｆと吐出ガスＧとが返
し戻される場合には前記圧縮機１の高低圧差Ｐよ
り大きな付勢力が得られる如き特性を有する形状
記憶合金製のスプリング１１とを配設して、油分
離器２から圧縮機１の吸入側へ吐出ガスＧ（この
時の吐出ガス温度＝t′）から分離された油Ｆのみ
が返し戻される際には、圧縮機１の高低圧差Ｐよ
り小さな付勢力Ｗのスプリング１１により弁体１
０が付勢されて開弁し、油Ｆの返し戻しが許容さ
れる一方、吐出ガスＧと油Ｆとが一緒に油戻し装
置６内に入つてくる際には、圧縮機１の高低圧差
Ｐより大きな付勢力Ｗのスプリング１１により弁
体１０が付勢されて閉弁し、吐出ガスＧのバイパ
スが阻止されるようにしたので、極めて簡易な手
段により油分離器２から圧縮機１の吸入側への油
戻し制御が正確に行え且つ吐出ガスＧのバイパス
も確実に防止することができるという実用的な効
果がある。(Effect of the invention) As described above, according to the invention, there is a gap between the oil separator 2 that separates and recovers the oil F contained in the discharged gas G from the compressor 1 and the suction side of the compressor 1. In the interposed oil return device, a valve body 10 for opening and closing the internal passage 9 is provided in the main body 8, which serves as a passage for the oil F returned from the oil separator 2 to the suction side of the compressor 1.
When the valve body 10 is biased in the valve closing direction and only the oil F is returned from the oil separator 2, a biasing force smaller than the pressure difference P between the compressor 1 and the oil separator 2 is obtained. A spring 11 made of a shape memory alloy is provided, which has a characteristic that when the oil F and discharged gas G are returned from the compressor 2, a biasing force larger than the pressure difference P between the compressor 1 and the compressor 1 can be obtained. When only the oil F separated from the discharge gas G (discharge gas temperature at this time = t') is returned from the oil separator 2 to the suction side of the compressor 1, the pressure difference between the high and low pressures P of the compressor 1 is smaller than that of the compressor 1. The valve body 1 is moved by the spring 11 of the biasing force W.
0 is energized to open the valve and allow the oil F to be returned. On the other hand, when the discharged gas G and the oil F enter the oil return device 6 together, the pressure difference between the high and low pressures of the compressor 1 increases. Since the valve body 10 is biased by the spring 11 with a biasing force W greater than P, and the valve is closed, thereby preventing the discharge gas G from bypassing, the oil separator 2 is removed from the compressor 1 by an extremely simple means. This has the practical effect of accurately controlling the return of oil to the suction side and reliably preventing bypass of the discharged gas G.
また、弁体１０の開閉を制御するスプリング１
１を形状記憶合金製としたことにより、弁体１０
の開閉制御が吐出ガス圧力と吐出ガス温度との両
方に対応して行なわれることとなり、圧縮機１の
吐出ガス圧力に変動があつた場合であつても、油
分離器２から圧縮機１の吸入側への油戻りが正確
に制御できるとともに、吐出ガスＧのバイパスが
確実に防止できるという効果もある。 Also, a spring 1 that controls opening and closing of the valve body 10 is provided.
1 is made of shape memory alloy, the valve body 10
The opening/closing control of the compressor 1 is performed in response to both the discharge gas pressure and the discharge gas temperature, so even if the discharge gas pressure of the compressor 1 fluctuates, the oil separator 2 This has the effect that the oil return to the suction side can be accurately controlled and that bypass of the discharged gas G can be reliably prevented.
第１図は本考案の実施例にかかる油分離器の油
戻し装置の使用例である冷凍装置の冷媒回路図、
第２図は第１図図示の油戻し装置における形状記
憶合金製スプリングのバネ特性を示す特性図であ
る。
１……圧縮機、２……油分離器、６……油戻し
装置、８……本体、９……本体内通路、１０……
弁体、１１……スプリング、Ｆ……油、Ｇ……吐
出ガス、Ｐ……高低圧差、ｔ……油温度、t′……
吐出ガス温度、Ｗ……バネ荷重（付勢力）。
FIG. 1 is a refrigerant circuit diagram of a refrigeration system that is an example of the use of an oil return device for an oil separator according to an embodiment of the present invention;
FIG. 2 is a characteristic diagram showing the spring characteristics of the shape memory alloy spring in the oil return device shown in FIG. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Oil separator, 6... Oil return device, 8... Main body, 9... Passage in main body, 10...
Valve body, 11...Spring, F...Oil, G...Discharge gas, P...High and low pressure difference, t...Oil temperature, t'...
Discharge gas temperature, W... Spring load (biasing force).
Claims (1)
分離回収する油分離器２と前記圧縮機１の吸入側
との間に介設されるものであつて、前記油分離器
２から圧縮機１の吸入側へ返し戻される油Ｆの通
路９となる本体８と、該本体内通路９を開閉する
弁体１０と、該弁体１０を閉弁方向に付勢し且つ
前記油分離器２から油Ｆのみが返し戻される場合
には油温ｔを感知してその時の圧縮機１の高低圧
差Ｐより小さな付勢力が得られ、前記油分離器２
から油Ｆと吐出ガスＧとが返し戻される場合には
吐出ガス温度t′を感知してその時の圧縮機１の高
低圧差Ｐより大きな付勢力が得られる如き特性を
有する形状記憶合金製のスプリング１１とを備え
たことを特徴とする油分離器の油戻し装置。 It is interposed between an oil separator 2 that separates and recovers oil F contained in discharge gas G from the compressor 1 and the suction side of the compressor 1. A main body 8 that serves as a passage 9 for oil F returned to the suction side of the machine 1, a valve body 10 that opens and closes the passage 9 in the main body, and a valve body 10 that urges the valve body 10 in the valve closing direction and the oil separator. When only the oil F is returned from the oil separator 2, the oil temperature t is sensed and a biasing force smaller than the pressure difference P between the compressor 1 and the oil separator 2 at that time is obtained.
When the oil F and the discharged gas G are returned from the compressor 1, the spring is made of a shape memory alloy and has such a characteristic that when the discharged gas temperature t' is sensed, a biasing force greater than the pressure difference P between the compressor 1 at that time can be obtained. 11. An oil return device for an oil separator, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988063468U JPH0539405Y2 (en) | 1988-05-13 | 1988-05-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988063468U JPH0539405Y2 (en) | 1988-05-13 | 1988-05-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01167556U JPH01167556U (en) | 1989-11-24 |
| JPH0539405Y2 true JPH0539405Y2 (en) | 1993-10-06 |
Family
ID=31288967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988063468U Expired - Lifetime JPH0539405Y2 (en) | 1988-05-13 | 1988-05-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0539405Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8950206B2 (en) | 2007-10-05 | 2015-02-10 | Emerson Climate Technologies, Inc. | Compressor assembly having electronics cooling system and method |
| US7895003B2 (en) | 2007-10-05 | 2011-02-22 | Emerson Climate Technologies, Inc. | Vibration protection in a variable speed compressor |
| US8459053B2 (en) | 2007-10-08 | 2013-06-11 | Emerson Climate Technologies, Inc. | Variable speed compressor protection system and method |
| US9541907B2 (en) | 2007-10-08 | 2017-01-10 | Emerson Climate Technologies, Inc. | System and method for calibrating parameters for a refrigeration system with a variable speed compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63129160U (en) * | 1987-02-18 | 1988-08-24 |
-
1988
- 1988-05-13 JP JP1988063468U patent/JPH0539405Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01167556U (en) | 1989-11-24 |
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