JPH06272977A - Flooded type evaporator - Google Patents
Flooded type evaporatorInfo
- Publication number
- JPH06272977A JPH06272977A JP6358393A JP6358393A JPH06272977A JP H06272977 A JPH06272977 A JP H06272977A JP 6358393 A JP6358393 A JP 6358393A JP 6358393 A JP6358393 A JP 6358393A JP H06272977 A JPH06272977 A JP H06272977A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- refrigerant
- auxiliary
- oil
- gas outlet
- 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
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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
- F25B2339/0242—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having tubular elements
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主にスクリュー式冷凍
装置などに用いられる満液式蒸発器、詳しくは、ほぼ水
平に延びる横長胴体と、該胴体の内方下部に配設され、
冷水入口管及び冷水出口管を接続する熱交換チューブと
を備え、前記胴体の下部に冷媒液入口を、上部に冷媒ガ
ス出口を設け、前記胴体内に導入する冷媒液を前記熱交
換チューブ内を流通する冷水と熱交換させることにより
冷媒液を蒸発させる満液式蒸発器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled evaporator mainly used in a screw type refrigerating machine or the like, and more specifically, a horizontally long body extending horizontally and a lower body disposed inside the body.
A heat exchange tube connecting a cold water inlet pipe and a cold water outlet pipe is provided, a refrigerant liquid inlet is provided at a lower portion of the body, a refrigerant gas outlet is provided at an upper portion, and a refrigerant liquid to be introduced into the body is provided in the heat exchange tube. The present invention relates to a full-fill type evaporator that evaporates a refrigerant liquid by exchanging heat with circulating cold water.
【０００２】[0002]
【従来の技術】一般に、満液式蒸発器を利用したスクリ
ュー式冷凍装置などにおいては、冷凍サイクルを循環す
る冷媒中の油が前記満液式蒸発器内で滞留し易く、圧縮
機側で油不足による潤滑不良を招いたりする虞れがある
ことから、前記満液式蒸発器内に滞留する油を前記圧縮
機側に積極的に戻す必要がある。2. Description of the Related Art Generally, in a screw type refrigerating apparatus using a full-fill type evaporator, oil in a refrigerant circulating in a refrigeration cycle tends to stay in the full-fill type evaporator, so that the oil on the compressor side is likely to stay. Since there is a risk of insufficient lubrication due to insufficient oil, it is necessary to positively return the oil retained in the liquid-filled evaporator to the compressor side.
【０００３】そこで、従来では、前記満液式蒸発器内に
滞留する油を圧縮機側に積極的に戻すために、例えば特
開平４−２８９６２号公報に開示され、かつ、図８で示
したように、スクリュー式圧縮機Ａと凝縮器Ｂと膨張弁
Ｃ及び満液式蒸発器Ｄを冷媒配管で接続した冷凍装置に
おいて、電熱ヒータＥを内装した冷媒加熱器Ｆを使用し
て、該冷媒加熱器Ｆの上部側に前記蒸発器Ｄの液域に連
通する第１配管Ｇを接続すると共に、前記冷媒加熱器Ｆ
の下部側に、途中にポンプＨをもつ第２配管Ｉの一端を
接続して、該第２配管Ｉの他端を前記圧縮機Ａ側に接続
し、また、前記冷媒加熱器Ｆの上部側を前記蒸発器Ｄの
下流側に第３配管Ｊを介して接続させている。Therefore, in the prior art, in order to positively return the oil accumulated in the full-fill type evaporator to the compressor side, for example, it is disclosed in Japanese Patent Laid-Open No. 4-28962 and is shown in FIG. As described above, in the refrigerating apparatus in which the screw compressor A, the condenser B, the expansion valve C, and the liquid-filled evaporator D are connected by the refrigerant pipe, the refrigerant heater F including the electric heater E is used to The first pipe G communicating with the liquid region of the evaporator D is connected to the upper side of the heater F, and the refrigerant heater F is connected.
Is connected to one end of a second pipe I having a pump H in the middle thereof, the other end of the second pipe I is connected to the compressor A side, and the upper side of the refrigerant heater F. Is connected to the downstream side of the evaporator D via a third pipe J.
【０００４】そして、前記蒸発器Ｄから前記第１配管Ｇ
を介して前記冷媒加熱器Ｆ内に油混じりの冷媒液を導入
して、この冷媒液を前記冷媒加熱器Ｆ内のヒータＥで加
熱することにより蒸発させて油を濃縮し、この油が濃縮
された冷媒液を前記ポンプＨを介して第２配管Ｉから前
記圧縮機Ａ側に積極的に戻すようにしている。また、前
記冷媒加熱器Ｆ内で前記ヒータＥにより蒸発された冷媒
ガスは、前記第３配管Ｊを介して前記蒸発器Ｄを通過し
た冷媒ガスと共にその下流側から圧縮機Ａに供給され
る。From the evaporator D to the first pipe G
An oil-mixed refrigerant liquid is introduced into the refrigerant heater F via the heater E, and the refrigerant liquid is heated by the heater E in the refrigerant heater F to evaporate and concentrate the oil. The generated refrigerant liquid is positively returned from the second pipe I to the compressor A side via the pump H. The refrigerant gas evaporated by the heater E in the refrigerant heater F is supplied to the compressor A from the downstream side together with the refrigerant gas passing through the evaporator D via the third pipe J.
【０００５】[0005]
【発明が解決しようとする課題】ところが、以上のよう
に前記冷媒加熱器Ｆを用いて、前記満液式蒸発器Ｄ内の
油を前記圧縮機Ａに戻すようにしたときには、該冷媒加
熱器Ｆを別途設けなければならないし、この冷媒加熱器
Ｆに内装されたヒータＥを加熱するための電源や配線な
ども別途必要とし、前記冷媒加熱器ＦやヒータＥ等、必
要とする機器類が多くなるばかりか、全体の配管構成も
複雑となる問題があった。However, when the refrigerant heater F is used to return the oil in the liquid-filled evaporator D to the compressor A as described above, the refrigerant heater F F must be separately provided, and a power source and wiring for heating the heater E incorporated in the refrigerant heater F are also required separately, and the required devices such as the refrigerant heater F and the heater E are required. There is a problem that not only the number of pipes increases, but also the entire piping configuration becomes complicated.
【０００６】また、従来では、例えば特公平１−２０６
９７号公報に示されているように、満液式蒸発器の液域
から油を混入した冷媒液を外部に取り出して、凝縮器を
通過した高温冷媒液を利用した熱交換器を通過させ、該
熱交換器内で前記蒸発器から取り出した冷媒液を凝縮器
から蒸発器に至る高温冷媒で加熱して蒸発させ、油の混
入した冷媒ガスとして、圧縮機の低圧側にエゼクタ等を
使用して供給することも行われているが、斯くする場合
にも、前述した場合と同様に、必要とする機器類が多く
なり、しかも、全体の配管構成が複雑となるのである。Further, in the past, for example, Japanese Patent Publication No. 1-206
As shown in Japanese Patent Publication No. 97, the refrigerant liquid mixed with oil is taken out from the liquid region of the full-fill type evaporator, and is passed through a heat exchanger using the high temperature refrigerant liquid that has passed through the condenser. In the heat exchanger, the refrigerant liquid taken out from the evaporator is heated by a high-temperature refrigerant from the condenser to the evaporator to be evaporated, and as a refrigerant gas mixed with oil, an ejector or the like is used on the low pressure side of the compressor. However, even in such a case, as in the case described above, a large number of required equipments are required, and the entire piping configuration becomes complicated.
【０００７】本発明の目的は、機器類を少なくでき、ま
た、配管構成も簡単にできながら、満液式蒸発器内の油
を圧縮機側に戻すことができる満液式蒸発器を提供する
ことにある。An object of the present invention is to provide a full-fill type evaporator capable of returning the oil in the full-fill type evaporator to the compressor side while reducing the number of equipments and simplifying the piping structure. Especially.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、ほぼ水平に延びる横長胴体５と、該胴体
５の下部に配設され、冷水入口管６１及び冷水出口管６
２を接続する熱交換チューブ６とを備え、前記胴体５の
下部に冷媒液入口７を、上部に冷媒ガス出口９を設け、
前記胴体５内に導入する冷媒液を前記熱交換チューブ６
内を流通する冷水と熱交換させることにより冷媒液を蒸
発させるようにした満液式蒸発器において、前記胴体５
内の一側に長さ方向に延びる仕切体１１を設けて、前記
胴体５における液域を主蒸発部５１と補助蒸発部５２と
に区画すると共に、前記主蒸発部５１に前記冷媒液入口
７を設けて、前記主蒸発部５１から補助蒸発部５２に冷
媒液を導入するようにする一方、前記補助蒸発部５２に
配設する熱交換チューブ６を前記冷水入口管６１に接続
して油濃縮部を形成し、前記補助蒸発部５２の液域に油
戻し管１２を接続したのである。In order to achieve the above object, the present invention has a horizontally elongated body 5 extending substantially horizontally, and a cold water inlet pipe 61 and a cold water outlet pipe 6 disposed at the lower portion of the body 5.
And a heat exchange tube 6 for connecting the two, a coolant liquid inlet 7 is provided in the lower portion of the body 5, and a coolant gas outlet 9 is provided in the upper portion,
Refrigerant liquid introduced into the body 5 is transferred to the heat exchange tube 6
In the liquid-filled evaporator in which the refrigerant liquid is evaporated by exchanging heat with the cold water flowing through the inside of the body 5,
A partition 11 extending in the longitudinal direction is provided on one side of the inside to partition the liquid area in the body 5 into a main evaporation portion 51 and an auxiliary evaporation portion 52, and the main liquid evaporation portion 7 is provided with the refrigerant liquid inlet 7 Is provided so that the refrigerant liquid is introduced from the main evaporation unit 51 to the auxiliary evaporation unit 52, while the heat exchange tube 6 arranged in the auxiliary evaporation unit 52 is connected to the cold water inlet pipe 61 to concentrate oil. That is, the oil return pipe 12 is connected to the liquid region of the auxiliary evaporation portion 52.
【０００９】また、前記胴体５における補助蒸発部５２
の液域から主蒸発部５１上方のガス域に斜め上方に延び
る整流板１３を設け、この整流板１３の補助蒸発部５２
側上方に前記冷媒ガス出口９を設けて冷媒ガス出口管１
０を接続すると共に、前記整流板１３の傾斜下端側で前
記補助蒸発部５２の液域に浸漬する下端部に、該補助蒸
発部５２の液域を前記整流板１３の上面側に開口する油
戻し通路１３ｂを設けるようにしてもよい。Further, the auxiliary evaporation portion 52 in the body 5
The straightening vane 13 extending obliquely upward from the liquid region of the above to the gas region above the main evaporating part 51 is provided, and the auxiliary vaporizing part 52 of this straightening plate 13 is provided.
The refrigerant gas outlet 9 is provided on the upper side to provide the refrigerant gas outlet pipe 1
0 is connected to the lower end of the rectifying plate 13 which is immersed in the liquid region of the auxiliary evaporating portion 52 at the lower end side of the rectifying plate 13, and oil which opens the liquid region of the auxiliary evaporating portion 52 to the upper surface side of the rectifying plate 13 The return passage 13b may be provided.
【００１０】さらには、前記胴体５における補助蒸発部
５２の上方から主蒸発部５１の上方に斜め上方に延びる
前記整流板１３を設け、この整流板１３の補助蒸発部５
２側上方に前記冷媒ガス出口９を設けて、前記冷媒ガス
出口管１０を接続すると共に、前記補助蒸発部５２の液
域に油戻し管１４を接続し、該油戻し管１４を、前記冷
媒ガス出口管１０に突入させ、この冷媒ガス出口管１０
の下流側に向けて開口させるようにしてもよい。Further, the straightening vane 13 extending obliquely upward from above the auxiliary vaporizing part 52 of the body 5 to above the main vaporizing part 51 is provided, and the auxiliary vaporizing part 5 of the straightening vane 13 is provided.
The refrigerant gas outlet 9 is provided above the second side, the refrigerant gas outlet pipe 10 is connected, and the oil return pipe 14 is connected to the liquid region of the auxiliary evaporation portion 52, and the oil return pipe 14 is connected to the refrigerant. The refrigerant gas outlet pipe 10 is made to rush into the gas outlet pipe 10.
You may make it open toward the downstream side of.
【００１１】また、前記補助蒸発部５２には、該補助蒸
発部５２の液面高さを検出し、液面高さ制御器１７を制
御する液面検出器１５を設けるのが好ましい。Further, it is preferable that the auxiliary evaporation section 52 is provided with a liquid level detector 15 for detecting the liquid level height of the auxiliary evaporation section 52 and controlling the liquid level height controller 17.
【００１２】[0012]
【作用】前記主蒸発部５１と前記補助蒸発部５２とにお
いて別々に前記熱交換チューブ６内を通過する冷水で熱
交換して冷媒液を蒸発させるのであるが、前記補助蒸発
部５２に配設される前記熱交換チューブ６を前記冷水入
口管６１に接続しているので、冷房ユニットなどを循環
して高温となり、前記冷水入口管６１から取り入れられ
る温度の高い戻り冷水がまず、前記補助蒸発部５２の冷
媒液と熱交換することになり、このため前記補助蒸発部
５２の冷媒液が、高温の冷水によって積極的に加熱され
て冷媒液の蒸発が盛んに行われることになり、しかも、
前記冷媒液入口７から流入してくる冷媒液は、前記主蒸
発部５１から前記補助蒸発部５２に導入されるのである
から、前記補助蒸発部５２おける冷媒液を油が濃縮され
た油リッチの冷媒液と成すことができるのである。In the main evaporation section 51 and the auxiliary evaporation section 52, the refrigerant liquid is evaporated by exchanging heat with the cold water passing through the inside of the heat exchange tube 6, which is arranged in the auxiliary evaporation section 52. Since the heat exchange tube 6 is connected to the cold water inlet pipe 61, the temperature of the cooling water circulating through the cooling unit or the like becomes high, and the high-temperature return cold water taken in from the cold water inlet pipe 61 is the first, and the auxiliary evaporation unit Therefore, the refrigerant liquid in 52 is heat-exchanged, so that the refrigerant liquid in the auxiliary evaporating section 52 is actively heated by the high-temperature cold water to actively evaporate the refrigerant liquid.
Since the refrigerant liquid flowing from the refrigerant liquid inlet 7 is introduced from the main evaporation portion 51 to the auxiliary evaporation portion 52, the refrigerant liquid in the auxiliary evaporation portion 52 is rich in oil. It can be formed with a refrigerant liquid.
【００１３】以上のように、前記補助蒸発部５２におい
て油の濃縮を行うことができるので、従来のように、ヒ
ータをもった冷媒加熱器や熱交換器などを別途設ける必
要がなく、また、配管構成も、前記油戻し管１２を設け
るだけなので簡単にできるのであって、油を濃縮させる
ための機器類を無くすことができ、かつ、配管構成も簡
単にできながら満液式蒸発器内の油を前記圧縮機に有効
に戻すことができるのである。As described above, since the oil can be concentrated in the auxiliary evaporation section 52, it is not necessary to separately provide a refrigerant heater or a heat exchanger having a heater as in the conventional case, and The piping structure can be simplified because only the oil return pipe 12 is provided. Therefore, it is possible to eliminate the equipment for concentrating the oil, and the piping structure can be simplified. The oil can be effectively returned to the compressor.
【００１４】また、前記胴体５における補助蒸発部５２
の液域から主蒸発部５１上方のガス域に斜め上方に延び
る整流板１３を設け、この整流板１３の補助蒸発部５２
側上方に前記冷媒ガス出口９を設けて冷媒ガス出口管１
０を接続すると共に、前記整流板１３の傾斜下端側で前
記補助蒸発部５２の液域に浸漬する下端部に、該補助蒸
発部５２の液域を前記整流板１３の上面側に開口する油
戻し通路１３ｂを設けるときには、前記主蒸発部５１と
補助蒸発部５２とにおいて、前記熱交換チューブ６との
接触により蒸発された冷媒ガスは前記整流板１３を通過
して整流された後、前記冷媒ガス出口管１０を経て前記
圧縮機１へと良好に送られると共に、前記整流板１３の
整流作用により、運転時に、該整流板１３の上面側圧
力、つまり、二次側圧力が、前記主蒸発部５１及び補助
蒸発部５２を構成する整流板１３下方の一次側圧力より
低圧になることを利用して、つまり、前記整流板１３の
上面側圧力が前記補助蒸発部５２の圧力、つまり、前記
整流板１３の一次側圧力に対し低圧となることを利用し
て、この圧力差により前記補助蒸発部５２で油が濃縮さ
れた冷媒液を、前記油戻し通路１３ｂから前記整流板１
３の上面側へと吸い上げ、該整流板１３を経て前記冷媒
ガス出口管１０から流出される冷媒ガスと共に圧縮機に
戻すことができるのであり、従って、従来のように、冷
媒加熱器又は熱交換器などを別途設けたり、また、これ
ら冷媒加熱器等で油を濃縮した冷媒液を圧縮機に送るた
めのポンプ又はエゼクタ等も特別に設けたりする必要な
く油を圧縮機に戻すことができるのである。しかも、こ
の場合整流板１３から前記冷媒ガス出口管１０を介して
前記圧縮機に戻せるので、油戻し管も別途設ける必要も
なくなって、配管構成をより簡素化することができるの
である。Further, the auxiliary evaporation portion 52 in the body 5
The straightening vane 13 extending obliquely upward from the liquid region of the above to the gas region above the main evaporating part 51 is provided, and the auxiliary vaporizing part 52 of this straightening plate 13 is provided.
The refrigerant gas outlet 9 is provided on the upper side to provide the refrigerant gas outlet pipe 1
0 is connected to the lower end of the rectifying plate 13 which is immersed in the liquid region of the auxiliary evaporating portion 52 at the lower end side of the rectifying plate 13, and oil which opens the liquid region of the auxiliary evaporating portion 52 to the upper surface side of the rectifying plate 13 When the return passage 13b is provided, the refrigerant gas evaporated by the contact with the heat exchange tube 6 in the main evaporation portion 51 and the auxiliary evaporation portion 52 passes through the rectification plate 13 and is rectified, and then the refrigerant. The pressure is favorably sent to the compressor 1 via the gas outlet pipe 10, and the rectifying action of the rectifying plate 13 causes the upper surface side pressure of the rectifying plate 13, that is, the secondary side pressure, to be the main evaporation during operation. Utilizing the fact that the pressure becomes lower than the primary side pressure below the straightening vane 13 that forms the part 51 and the auxiliary vaporizing part 52, that is, the upper surface side pressure of the straightening vane 13 is the pressure of the auxiliary vaporizing part 52, that is, the above-mentioned. Primary side of baffle plate 13 By utilizing the fact that the low pressure to force the refrigerant liquid oil is concentrated in the auxiliary evaporator 52 by this pressure difference, the flow regulating plate from the oil return passage 13b 1
3 can be sucked up to the upper surface side and returned to the compressor together with the refrigerant gas flowing out of the refrigerant gas outlet pipe 10 through the rectifying plate 13, and thus, as in the conventional case, the refrigerant heater or the heat exchange. Since it is possible to return the oil to the compressor, it is not necessary to separately provide a device or the like, or to provide a pump or an ejector for sending the refrigerant liquid that concentrates the oil in the refrigerant heater to the compressor. is there. Moreover, in this case, since it is possible to return from the straightening plate 13 to the compressor via the refrigerant gas outlet pipe 10, there is no need to separately provide an oil return pipe, and the piping configuration can be further simplified.
【００１５】さらに、前記胴体５における補助蒸発部５
２の上方から主蒸発部５１の上方に斜めに延びる前記整
流板１３を設け、この整流板１３の補助蒸発部５２側上
方に前記冷媒ガス出口９を設けて前記冷媒ガス出口管１
０を接続すると共に、前記補助蒸発部５２の液域に油戻
し管１４を接続し、該油戻し管１４を、前記冷媒ガス出
口管１０内に突入させ、この冷媒ガス出口管１０の下流
側に向けて開口させることにより、エゼクタ作用で前記
補助蒸発部５２から油リッチの冷媒液を、前記整流板１
３を経て前記冷媒ガス出口管１０から流出される冷媒ガ
スと共に圧縮機に戻すことができるのである。従って、
この場合も、前記補助蒸発部５２と前記冷媒ガス出口管
１０とを結ぶ油戻し管１４を設けるだけでよいので、配
管構成を簡素化することができるのである。Further, the auxiliary evaporation portion 5 in the body 5
2 is provided obliquely extending above the main evaporation section 51 from above 2, and the refrigerant gas outlet 9 is provided above the auxiliary evaporation section 52 side of the current plate 13 to provide the refrigerant gas outlet pipe 1
0 is connected, the oil return pipe 14 is connected to the liquid area of the auxiliary evaporation part 52, and the oil return pipe 14 is thrust into the refrigerant gas outlet pipe 10, and the downstream side of the refrigerant gas outlet pipe 10 is connected. By opening to the rectifier plate 1, the oil-rich refrigerant liquid from the auxiliary evaporation portion 52 is ejected by the ejector action.
It is possible to return to the compressor together with the refrigerant gas flowing out of the refrigerant gas outlet pipe 10 via 3. Therefore,
Also in this case, since it is only necessary to provide the oil return pipe 14 that connects the auxiliary evaporation portion 52 and the refrigerant gas outlet pipe 10, it is possible to simplify the pipe configuration.
【００１６】しかも、運転停止時、前記胴体５内におけ
る冷媒液の液面が前記仕切体１１の上壁部より高くなる
ことがあっても、前記整流板１３上に冷媒液が入り込ん
で溜ることがないから、運転再開時に、前記整流板１３
上に溜る冷媒液が前記冷媒ガス出口管１０から前記圧縮
機１側に多量に戻る所謂液バックの危険性を回避するこ
ともできる。Further, even when the liquid level of the refrigerant liquid in the body 5 becomes higher than the upper wall portion of the partition body 11 when the operation is stopped, the refrigerant liquid enters and collects on the rectifying plate 13. Therefore, when the operation is restarted, the rectifying plate 13
It is also possible to avoid the risk of so-called liquid bag in which a large amount of the refrigerant liquid accumulated above returns from the refrigerant gas outlet pipe 10 to the compressor 1 side.
【００１７】また、前記補助蒸発部５２に、該補助蒸発
部５２の液面高さを検出し、液面高さ制御器１７を制御
する液面検出器１５を備えることにより、前記液面検出
器１５で前記補助蒸発部５２の液面高さを検出して、こ
の検出結果に基づく前記制御器１７からの出力により前
記流量調整弁１６の開度制御を行なうことができ、この
結果、前記冷媒液入口管７から前記胴体５の主蒸発部５
１内に導入される冷媒量を、前記仕切板１１の上部高さ
よりも常に低位となるように調整制御できるのであり、
従って、前記主蒸発部５１から補助蒸発部５２に多くの
冷媒液が導入されることによる油濃度低下を防止でき、
油濃縮度の高い冷媒液を前記圧縮機に戻すことができる
のである。Further, by providing the auxiliary evaporation unit 52 with a liquid level detector 15 which detects the liquid level height of the auxiliary evaporation unit 52 and controls the liquid level height controller 17, the liquid level detection The level of the liquid level of the auxiliary evaporator 52 is detected by the device 15, and the opening degree of the flow rate adjusting valve 16 can be controlled by the output from the controller 17 based on the detection result. From the refrigerant liquid inlet pipe 7 to the main evaporation portion 5 of the body 5
It is possible to adjust and control the amount of the refrigerant introduced into 1 so that it is always lower than the upper height of the partition plate 11.
Therefore, it is possible to prevent a decrease in the oil concentration due to the introduction of a large amount of the refrigerant liquid from the main evaporation unit 51 to the auxiliary evaporation unit 52,
The refrigerant liquid having a high oil concentration can be returned to the compressor.
【００１８】[0018]
【実施例】図３は満液式蒸発器を用いたスクリュー式冷
凍装置の配管系統を示しており、スクリュー式圧縮機１
の冷媒吐出側に凝縮器２と膨張弁３及び満液式蒸発器４
を冷媒配管を介してそれぞれ接続し、これら各機器で冷
凍サイクルを形成している。EXAMPLE FIG. 3 shows a piping system of a screw type refrigerating apparatus using a liquid-filled evaporator. The screw type compressor 1
On the refrigerant discharge side of the condenser 2, the expansion valve 3 and the full liquid type evaporator 4
Are connected via a refrigerant pipe, and a refrigeration cycle is formed by these respective devices.
【００１９】前記満液式蒸発器４は、図１，図２で明ら
かにしたように、ほぼ水平状に延びる横長胴体５の内方
下部側に、長手方向に蛇行する熱交換チューブ６を配設
すると共に、前記胴体５の下部側に冷媒液入口７を設
け、該冷媒液入口７に前記膨張弁３側から延びる冷媒液
入口管８を接続する一方、前記胴体５の上部側に冷媒ガ
ス出口９を設けて、この冷媒ガス出口９に前記圧縮機１
側に至る冷媒ガス出口管１０を接続している。また、前
記熱交換チューブ６の冷水入口及び出口側には、それぞ
れ冷水入口管６１と冷水出口管６２とを接続するのであ
り、図１乃至図３に示した実施例では、前記胴体５の径
方向一側に配設する前記熱交換チューブ６に前記冷水入
口管６１を接続して冷水を取り入れる一方、前記胴体５
の径方向他側に配設する前記チューブ６に前記冷水出口
管６２を接続して冷却水を取り出すようにしている。As shown in FIGS. 1 and 2, the liquid-filled evaporator 4 has a heat exchange tube 6 meandering in the longitudinal direction on the inner lower side of a horizontally elongated body 5 extending in a substantially horizontal direction. A refrigerant liquid inlet 7 is provided on the lower side of the body 5, and a refrigerant liquid inlet pipe 8 extending from the expansion valve 3 side is connected to the refrigerant liquid inlet 7, while a refrigerant gas is provided on the upper side of the body 5. An outlet 9 is provided, and the compressor 1 is provided at the refrigerant gas outlet 9.
The refrigerant gas outlet pipe 10 reaching the side is connected. A cold water inlet pipe 61 and a cold water outlet pipe 62 are connected to the cold water inlet and outlet sides of the heat exchange tube 6, respectively. In the embodiment shown in FIGS. The cold water inlet pipe 61 is connected to the heat exchange tube 6 arranged on one side in the direction to take in cold water, while the body 5
The cold water outlet pipe 62 is connected to the tube 6 disposed on the other side in the radial direction to take out cooling water.
【００２０】つまり、前記冷媒液入口７から冷媒液入口
管８を介して前記胴体５の内方下部側に、前記凝縮器２
から膨張弁３を介して油混じりの冷媒液を導入し、この
冷媒液と前記冷水入口管６１から熱交換チューブ６内に
送られた冷水とを熱交換させて、前記チューブ６内の冷
水を冷却して前記冷水出口管６２から取出して冷房ユニ
ットなどへと送る一方、前記冷媒液は、前記熱交換チュ
ーブ６との熱交換により蒸発し、また、蒸発した冷媒ガ
スは、前記胴体５の上部側に設けた冷媒ガス出口９から
冷媒側出口管１０を介して前記圧縮機１に戻るようにし
ている。That is, the condenser 2 is provided from the refrigerant liquid inlet 7 through the refrigerant liquid inlet pipe 8 to the lower inner side of the body 5.
A refrigerant liquid mixed with oil is introduced from the expansion valve 3 through the expansion valve 3, and the refrigerant liquid and the cold water sent from the cold water inlet pipe 61 into the heat exchange tube 6 are heat-exchanged to cool the cold water in the tube 6. The refrigerant liquid is cooled and taken out from the cold water outlet pipe 62 and sent to a cooling unit or the like, while the refrigerant liquid is evaporated by heat exchange with the heat exchange tube 6, and the evaporated refrigerant gas is discharged from the upper part of the body 5. The refrigerant gas outlet 9 provided on the side is returned to the compressor 1 via the refrigerant side outlet pipe 10.
【００２１】しかして、前記胴体５内における径方向一
側部で液域に、該胴体５の長手方向に延びる仕切体１１
を配設して、該仕切体１１で前記胴体５内の液域を主蒸
発部５１と補助蒸発部５２とに区画すると共に、前記主
蒸発部５１に前記冷媒液入口７を設けて、前記仕切体１
１には、前記主蒸発部５１と補助蒸発部５２とを連通さ
せる連通部１１ａを形成して、この連通部１１ａを介し
て前記冷媒液入口７から前記主蒸発部５１に供給される
冷媒液を前記補助蒸発部５２側に導入させるように構成
する。また、前記仕切体１１で画成される前記補助蒸発
部５２には、前記冷水入口管６１が接続される前記熱交
換チューブ６の冷水入口側を配管して油濃縮部を形成
し、前記胴体５に前記補助蒸発部５２の液域に開口し、
前記圧縮機１側に至る油戻し管１２を接続する。Thus, the partition body 11 extending in the longitudinal direction of the body 5 in the liquid region at one side in the radial direction in the body 5.
And the partition 11 divides the liquid area in the body 5 into a main evaporation part 51 and an auxiliary evaporation part 52, and the main evaporation part 51 is provided with the refrigerant liquid inlet 7. Partition 1
1, a communication portion 11a is formed which communicates the main evaporation portion 51 and the auxiliary evaporation portion 52, and the refrigerant liquid supplied from the refrigerant liquid inlet 7 to the main evaporation portion 51 via the communication portion 11a. Is introduced to the auxiliary evaporation section 52 side. Further, in the auxiliary evaporation part 52 defined by the partition body 11, the cold water inlet side of the heat exchange tube 6 to which the cold water inlet pipe 61 is connected is piped to form an oil concentrating portion, 5 is opened in the liquid area of the auxiliary evaporation section 52,
The oil return pipe 12 reaching the compressor 1 side is connected.
【００２２】即ち、前記補助蒸発部５２に配管される熱
交換チューブ６は、冷房ユニットなどを循環して戻って
きた高温の冷水を利用できるように、前記冷水入口管６
１と接続するのであり、前記熱交換チューブ６の冷水入
口側を流れる高温の冷水で前記主蒸発部５１から補助蒸
発部５２内に導入される冷媒液を積極的に加熱して蒸発
を盛んに行わせて、前記補助蒸発部５２の冷媒液を油が
濃縮した油リッチの冷媒液の状態にし、この油が濃縮さ
れた油リッチの冷媒液を前記油戻し管１２から前記圧縮
機１に戻すようにするのである。That is, the heat exchange tube 6 provided in the auxiliary evaporating section 52 is provided with the cold water inlet pipe 6 so that the high temperature cold water circulated through the cooling unit or the like can be used.
1 is connected to the heat exchange tube 6, and the high-temperature cold water flowing through the cold water inlet side of the heat exchange tube 6 actively heats the refrigerant liquid introduced from the main evaporation portion 51 into the auxiliary evaporation portion 52 to actively evaporate the refrigerant liquid. By performing the operation, the refrigerant liquid in the auxiliary evaporation unit 52 is changed to the oil-rich refrigerant liquid in which the oil is concentrated, and the oil-rich refrigerant liquid in which the oil is concentrated is returned from the oil return pipe 12 to the compressor 1. To do so.
【００２３】また、前記仕切体１１に設ける連通部１１
ａは、該仕切体１１の上部に切欠部を設けて形成するの
であり、また、前記油戻し管１２は、前記補助蒸発部５
２の長手方向における前記熱交換チューブ６と前記冷水
入口管６１との接続近くの液域に開口するように前記胴
体５側部に接続するのであって、斯くすることにより、
前記冷水入口管６１から導入される最も温度の高い冷水
により冷媒液が熱交換される前記補助蒸発部５２の冷水
入口側から油リッチの冷媒液を前記油戻し管１２を介し
て取り出すことができ、最も油濃縮度の高い冷媒液を前
記油戻し管１２を介して前記圧縮機１に戻すことができ
るのである。Further, a communicating portion 11 provided on the partition body 11
a is formed by providing a notch on the upper part of the partition body 11, and the oil return pipe 12 is formed by the auxiliary evaporation part 5
2 is connected to the side of the body 5 so as to open in the liquid region near the connection between the heat exchange tube 6 and the cold water inlet pipe 61 in the longitudinal direction of 2, and by doing so,
The oil-rich refrigerant liquid can be taken out through the oil return pipe 12 from the cold water inlet side of the auxiliary evaporation part 52 where the refrigerant liquid is heat-exchanged by the cold water having the highest temperature introduced from the cold water inlet pipe 61. The refrigerant liquid with the highest oil concentration can be returned to the compressor 1 via the oil return pipe 12.
【００２４】次に、以上の構成による作用について説明
する。前記満液式蒸発器４は運転時に、先ず、前記冷媒
液入口管８から冷媒液入口７を経て前記胴体５の前記主
蒸発部５１に油混じりの冷媒液が導入され、この冷媒液
と前記熱交換チューブ６内の冷水とが熱交換されて該冷
水が冷却され、該熱交換チューブ６に接続した前記冷水
出口管６２から冷却水が取出されて冷房ユニットなどに
送られる一方、前記冷媒液は、前記熱交換チューブ６と
の熱交換により蒸発して冷媒ガスとなり、この冷媒ガス
は、前記胴体５の上部側に設けた冷媒ガス出口９から冷
媒ガス出口管１０を介して前記圧縮機１に戻る。Next, the operation of the above configuration will be described. During operation of the full liquid type evaporator 4, first, an oil-mixed refrigerant liquid is introduced from the refrigerant liquid inlet pipe 8 through the refrigerant liquid inlet 7 into the main evaporation portion 51 of the body 5, and the refrigerant liquid and the The cold water in the heat exchange tube 6 is heat-exchanged to cool the cold water, and the cooling water is taken out from the cold water outlet pipe 62 connected to the heat exchange tube 6 and sent to a cooling unit or the like. Is evaporated by heat exchange with the heat exchange tube 6 to become a refrigerant gas, and this refrigerant gas is discharged from the refrigerant gas outlet 9 provided on the upper side of the body 5 through the refrigerant gas outlet pipe 10 to the compressor 1 Return to.
【００２５】また、冷媒液は、前記仕切体１１で画成さ
れる主蒸発部５１に導入されて、この主蒸発部５１での
熱交換により油濃度が増した冷媒液が、前記仕切体１１
の連通部１１ａから前記補助蒸発部５２に導入され、こ
の冷媒液が前記補助蒸発部５２に配設される前記熱交換
チューブ６内を通過する冷水で熱交換されるのであり、
しかも、前記熱交換チューブ６内を流れる冷水は、冷房
ユニットなどを循環して高温となって前記冷水入口管６
１に戻る高温の冷水であるから、前記補助蒸発部５２で
は、この高温の冷水によって冷媒液が積極的に加熱され
て蒸発して冷媒ガスとなり、前記補助蒸発部５２におけ
る冷媒液は前記主蒸発部５１の冷媒液に比べて油が濃縮
された油濃度の高い油リッチの冷媒液と成すことができ
るのである。従って、油濃縮度の高い冷媒液を前記補助
蒸発部５２に接続した前記油戻し管１２から前記圧縮機
１側へと戻すことができるのである。Further, the refrigerant liquid is introduced into the main evaporation portion 51 defined by the partition body 11, and the refrigerant liquid having an increased oil concentration due to the heat exchange in the main evaporation portion 51 is the partition liquid body 11.
Is introduced into the auxiliary evaporation section 52 from the communication section 11a, and the refrigerant liquid is heat-exchanged with the cold water passing through the heat exchange tube 6 arranged in the auxiliary evaporation section 52.
Moreover, the cold water flowing in the heat exchange tube 6 circulates through the cooling unit or the like to become a high temperature, and the cold water inlet pipe 6
Since it is the high-temperature cold water that returns to 1, the refrigerant liquid is actively heated by this high-temperature cold water to evaporate into a refrigerant gas in the auxiliary evaporation section 52, and the refrigerant liquid in the auxiliary evaporation section 52 is the main evaporation. It is possible to form an oil-rich refrigerant liquid having a high oil concentration in which oil is concentrated as compared with the refrigerant liquid of the portion 51. Therefore, the refrigerant liquid having a high oil concentration can be returned to the compressor 1 side from the oil return pipe 12 connected to the auxiliary evaporation section 52.
【００２６】従って、以上の満液式蒸発器４では、前記
補助蒸発部５２において油の濃縮を行うことができるの
で、前記満液式蒸発器４内において油を濃縮することが
でき、従来のように、冷媒加熱器や熱交換器などを別途
設ける必要がなく、また、配管構成も、前記油戻し管１
２を設けるだけの簡単な構成にできるのであって、機器
類を少なくでき、かつ、配管構成も簡単にできながら満
液式蒸発器内の油を前記圧縮機１側に確実に戻すことが
できるのである。Therefore, in the above-described liquid-filled evaporator 4, the oil can be concentrated in the auxiliary evaporator 52, so that the oil can be concentrated in the liquid-filled evaporator 4. As described above, it is not necessary to separately provide a refrigerant heater or a heat exchanger, and the piping configuration is the same as that of the oil return pipe 1
It is possible to reduce the number of equipments and simplify the piping configuration because it is possible to have a simple configuration in which only 2 is provided, and it is possible to reliably return the oil in the liquid-filled evaporator to the compressor 1 side. Of.
【００２７】また、本発明では、図４に第２実施例とし
て示したように、前記胴体５の内部に、該胴体５の長手
方向に延び、かつ、前記仕切体１１で画成される前記補
助蒸発部５２の液域から主蒸発部５１の上方ガス域にか
けて斜め上方に延びる長尺な整流板１３を設けて、前記
胴体５内を蒸発室５３と整流室５４とに区画して、この
整流室５４に前記冷媒ガス出口９を開口させて、前記冷
媒ガス出口管１０を接続すると共に、前記整流板１３
を、図５に示したように、その傾斜上端側に前記蒸発室
５３のガス域を前記整流室５４を介して前記冷媒ガス出
口管１０に連通させる円弧溝形状とされた複数の整流通
路１３ａを切欠形成し、かつ、前記整流板１３の傾斜下
端側を前記補助蒸発部５２の液域に浸漬させこの傾斜下
端部に、該補助蒸発部５２の液域を前記整流板１３の上
面側に開口する丸穴形状の油戻し通路１３ｂを設けるよ
うにしてもよい。以上の構成とするときには、前記主蒸
発部５１及び補助蒸発部５２において前記熱交換チュー
ブ６との接触により蒸発された冷媒ガスを前記整流板１
３の整流通路１３ａから前記整流室５４に流入させて整
流した後、前記冷媒ガス出口管１０を経て前記圧縮機１
側へと良好に送ることができ、しかも、冷凍装置の運転
時に、前記整流室５４が前記整流板１３の整流作用によ
り前記蒸発室５３より低圧になることを利用して、つま
り、前記整流板１３の上面側の前記整流室５４が前記補
助蒸発部５２に対し低圧となることを利用して、前記補
助蒸発部５２で濃縮された油濃縮度の高い冷媒液を、差
圧により前記油戻し通路１３ｂから前記整流板１３の上
面側へと吸い上げて、該整流板１３の整流通路１３ａを
経て前記冷媒ガス出口管１０へと流出される冷媒ガスと
共に前記圧縮機１に戻すことができるのである。従っ
て、従来のように、冷媒加熱器又は熱交換器などを別途
設ける必要がないだけでなく、油濃縮度の高い冷媒液を
圧縮機に戻すためのポンプ又はエゼクタ等も別途設けな
くとも、前記圧縮機１へ有効に戻すことができ、しか
も、前記第２実施例によれば、図１に示した第１実施例
の油戻し管１２をも配設する必要がなくなるのであるか
ら、一層配管構成を簡素化できるのである。In the present invention, as shown as a second embodiment in FIG. 4, the inside of the body 5 extends in the longitudinal direction of the body 5 and is defined by the partition body 11. A long straightening plate 13 extending obliquely upward from the liquid area of the auxiliary evaporating portion 52 to the upper gas area of the main evaporating portion 51 is provided to partition the inside of the body 5 into an evaporating chamber 53 and a straightening chamber 54. The refrigerant gas outlet 9 is opened in the rectifying chamber 54 to connect the refrigerant gas outlet pipe 10 and the rectifying plate 13
As shown in FIG. 5, a plurality of straightening passages 13a in the shape of an arc groove that connects the gas region of the evaporation chamber 53 to the refrigerant gas outlet pipe 10 via the straightening chamber 54 on the upper end side of the inclination. Is formed by notching, and the slanted lower end side of the straightening vane 13 is immersed in the liquid area of the auxiliary evaporating part 52, and the liquid zone of the auxiliary evaporating part 52 is placed on the upper surface side of the straightening plate 13. A round hole-shaped oil return passage 13b may be provided. In the case of the above configuration, the refrigerant gas evaporated by the contact with the heat exchange tube 6 in the main evaporation part 51 and the auxiliary evaporation part 52 is rectified by the straightening plate 1.
After flowing into the rectification chamber 54 from the rectification passage 13a of No. 3 and rectified, the compressor 1 is passed through the refrigerant gas outlet pipe 10.
It can be sent to the side favorably, and moreover, when the refrigerating apparatus is in operation, the rectification chamber 54 has a lower pressure than the evaporation chamber 53 due to the rectification action of the rectification plate 13, that is, the rectification plate. By utilizing the fact that the pressure-rectifying chamber 54 on the upper surface side of 13 is at a low pressure with respect to the auxiliary evaporation part 52, the refrigerant liquid having a high oil concentration and concentrated in the auxiliary evaporation part 52 is returned to the oil by a differential pressure. It is possible to suck up from the passage 13b to the upper surface side of the straightening vane 13 and return it to the compressor 1 together with the refrigerant gas flowing through the straightening passage 13a of the straightening vane 13 to the refrigerant gas outlet pipe 10. . Therefore, unlike the conventional case, it is not necessary to separately provide a refrigerant heater or a heat exchanger, and even if a pump or an ejector for returning a refrigerant liquid having a high oil concentration to the compressor is not separately provided, Since it can be effectively returned to the compressor 1, and according to the second embodiment, it is not necessary to dispose the oil return pipe 12 of the first embodiment shown in FIG. The configuration can be simplified.
【００２８】尚、前記整流板１３に設ける前記油戻し通
路１３ｂは、最も油濃縮度の高い冷媒液が得られる前記
補助蒸発部５２の冷水入口管接続側に形成することが好
ましく、斯くすることにより前記圧縮機１側に最も油の
濃縮度の高い冷媒液を送ることができる。The oil return passage 13b provided in the straightening vane 13 is preferably formed on the cold water inlet pipe connection side of the auxiliary evaporating portion 52 where the refrigerant liquid having the highest oil concentration is obtained. Thus, the refrigerant liquid having the highest oil concentration can be sent to the compressor 1 side.
【００２９】さらに、本発明では、図６の第３実施例に
示したように、前記胴体５の内部に、該胴体５の長手方
向に延び、かつ、前記仕切体１１で画成される前記補助
蒸発部５２の上方側から主蒸発部５１の上方に斜め上方
に延びる長尺な前記整流板１３を設けて、前記胴体５を
蒸発室５３と整流室５４とに区画すると共に、前記整流
板１３の傾斜上端側に複数の整流通路１３ａを形成し、
さらに、前記整流室５４に前記冷媒ガス出口９を開口さ
せて、前記冷媒ガス出口管１０を接続すると共に、前記
補助蒸発部５２の液域に開口し、前記冷媒ガス出口管１
０よりも小径とされた油戻し管１４を前記胴体５に接続
し、該油戻し管１４を中間部から上方に立上げて前記冷
媒ガス出口管１０内に突入させ、かつ、この突入された
油戻し管１４を前記冷媒ガス出口管１０とほぼ平行状に
屈曲させて、該冷媒ガス出口管１０の下流側に向けて前
記油戻し管１４の先端開口部を開口させるようにしても
よい。Further, in the present invention, as shown in the third embodiment of FIG. 6, the inside of the body 5 extends in the longitudinal direction of the body 5 and is defined by the partition body 11. The elongated straightening vane 13 extending obliquely upward from the upper side of the auxiliary vaporizing part 52 to above the main vaporizing part 51 is provided to partition the body 5 into the vaporizing chamber 53 and the straightening chamber 54, and at the same time, the straightening plate is provided. A plurality of rectifying passages 13a are formed on the upper end side of the slope of 13,
Further, the refrigerant gas outlet 9 is opened in the rectification chamber 54, the refrigerant gas outlet pipe 10 is connected, and the refrigerant gas outlet pipe 1 is opened in the liquid region of the auxiliary evaporation portion 52.
An oil return pipe 14 having a diameter smaller than 0 is connected to the body 5, the oil return pipe 14 is erected upward from an intermediate portion and thrusts into the refrigerant gas outlet pipe 10, and the thrust is applied. The oil return pipe 14 may be bent substantially parallel to the refrigerant gas outlet pipe 10, and the tip opening of the oil return pipe 14 may be opened toward the downstream side of the refrigerant gas outlet pipe 10.
【００３０】以上の構成とするときには、エゼクタ作用
で、前記補助蒸発部５２内で濃縮された油濃縮度の高い
冷媒液を前記油戻し管１４から冷媒ガス出口管１０を介
して前記圧縮機１に戻すことができる。従って、この場
合も、前記補助蒸発部５２と前記冷媒ガス出口管１０に
おける前記冷媒ガス出口９との接続部近くとを結ぶ油戻
し管１４を設けるだけでよいので、図１の実施例より配
管構成を簡素化することができるのである。In the above-mentioned structure, the refrigerant liquid having a high oil concentration, which is concentrated in the auxiliary evaporation portion 52 by the ejector action, is passed from the oil return pipe 14 through the refrigerant gas outlet pipe 10 to the compressor 1 Can be returned to. Therefore, in this case as well, it is only necessary to provide the oil return pipe 14 that connects the auxiliary evaporation portion 52 and the vicinity of the connection portion of the refrigerant gas outlet pipe 10 with the refrigerant gas outlet 9, so that the piping shown in FIG. The configuration can be simplified.
【００３１】しかも、運転停止時、前記胴体５内におけ
る冷媒液の液面が前記仕切体１１の上壁部より高くなる
ことがあっても、図４の実施例のように、前記補助蒸発
部５２の冷媒液が、前記整流板１３上に入りこんで溜る
ようなことはないから、運転再開時に、前記整流板１３
上に溜る冷媒液が前記冷媒ガス出口管１０から前記圧縮
機１に多量に戻る所謂液バックの危険性を回避すること
もできる。Moreover, even if the liquid level of the refrigerant liquid in the body 5 becomes higher than the upper wall portion of the partition 11 when the operation is stopped, as in the embodiment of FIG. The refrigerant liquid 52 does not enter and accumulate on the straightening vane 13. Therefore, when the operation is restarted, the straightening vane 13
It is possible to avoid the risk of so-called liquid bag in which a large amount of the refrigerant liquid accumulated above returns from the refrigerant gas outlet pipe 10 to the compressor 1.
【００３２】また、以上のような各種満液式蒸発器４に
は、図７で示したように、前記胴体５の側部に前記補助
蒸発部５２の液面高さを検出する液面検出器１５を設
け、前記凝縮器２と蒸発器４とを接続する配管途中に流
量調整弁１６を介装させると共に、前記液面検出器１５
による検出結果に基づき、前記冷媒液入口管７から前記
胴体５の主蒸発部５１内に導入される冷媒量が、前記仕
切板１１の上部高さよりも常に低位となり、かつ、前記
補助蒸発部５２への前記主蒸発部５１からの液冷媒の導
入がなくなったときに導入できる量となるように前記流
量調整弁１６の開度を制御して前記蒸発器４への流量を
制御し、該蒸発器４内の液面高さを制御する液面高さ制
御器１７を設けるようにしてもよい。Further, in each of the above-described full-fill type evaporators 4, as shown in FIG. 7, a liquid level detection for detecting the liquid level height of the auxiliary evaporation section 52 on the side of the body 5 is performed. Is provided with a flow rate adjusting valve 16 in the middle of the pipe connecting the condenser 2 and the evaporator 4, and the liquid level detector 15
The amount of the refrigerant introduced from the refrigerant liquid inlet pipe 7 into the main evaporation portion 51 of the body 5 is always lower than the upper height of the partition plate 11, and the auxiliary evaporation portion 52 based on the detection result of When the liquid refrigerant from the main evaporator 51 is not introduced into the evaporator 4, the opening of the flow rate adjusting valve 16 is controlled to control the flow rate to the evaporator 4 and the evaporation is performed. A liquid level controller 17 for controlling the liquid level inside the container 4 may be provided.
【００３３】以上の構成とするときには、前記液面検出
器１５で前記補助蒸発部５２の液面高さが検出され、こ
の検出結果に基づく前記制御器１７からの出力により前
記流量調整弁１６の開度制御を行うことができるので、
前記冷媒液入口管７から前記胴体５の主蒸発部５１内に
導入される冷媒量を、前記仕切板１１の上部高さよりも
常に低位となるように調整制御されるのであり、従っ
て、前記主蒸発部５１から補助蒸発部５２に多量の冷媒
液が導入されることによる油濃度低下を防止でき、つま
り、前記圧縮機１に油濃度の低い冷媒液が戻されること
を防止することができ、油濃縮度の高い冷媒液を前記圧
縮機１に戻すことができるのである。In the case of the above configuration, the liquid level detector 15 detects the liquid level of the auxiliary evaporation portion 52, and the output from the controller 17 based on the detection result detects the liquid level of the flow rate adjusting valve 16. Since the opening can be controlled,
The amount of the refrigerant introduced from the refrigerant liquid inlet pipe 7 into the main evaporation portion 51 of the body 5 is adjusted and controlled so as to be always lower than the upper height of the partition plate 11, and thus the main It is possible to prevent a decrease in oil concentration due to the introduction of a large amount of refrigerant liquid from the evaporation unit 51 to the auxiliary evaporation unit 52, that is, it is possible to prevent the refrigerant liquid having a low oil concentration from being returned to the compressor 1. The refrigerant liquid having a high oil concentration can be returned to the compressor 1.
【００３４】[0034]
【発明の効果】以上説明したように、本発明の満液式蒸
発器は、前記胴体５内の一側に長さ方向に延びる仕切体
１１を設けて、前記胴体５における液域を主蒸発部５１
と補助蒸発部５２とに区画すると共に、前記主蒸発部５
１に前記冷媒液入口７を設けて、前記主蒸発部５１から
補助蒸発部５２に冷媒液を導入するようにする一方、前
記補助蒸発部５２に配設する熱交換チューブ６を前記冷
水入口管６１に接続して油濃縮部を形成し、前記補助蒸
発部５２の液域に油戻し管１２を接続したから、前記補
助蒸発部５２の冷媒液を、冷房ユニットなどを循環して
高温となり、前記冷水入口管６１から取り入れられる温
度の高い戻り冷水によって熱交換することになり、この
ため前記補助蒸発部５２の冷媒液が、高温の冷水によっ
て積極的に加熱させて冷媒液の蒸発が盛んに行われるこ
とになり、しかも、前記冷媒液入口７から流入してくる
冷媒液は、一旦前記主蒸発部５１に導入されて、該主蒸
発部５１から補助蒸発部５２に導入されるのであるか
ら、前記補助蒸発部５２おける冷媒液を油が濃縮された
油リッチの冷媒液と成すことができるのである。As described above, in the liquid-filled evaporator of the present invention, the partition body 11 extending in the length direction is provided on one side of the body 5 so that the liquid area in the body 5 is mainly evaporated. Part 51
And the auxiliary evaporation section 52, and the main evaporation section 5
1 is provided with the refrigerant liquid inlet 7 to introduce the refrigerant liquid from the main evaporation portion 51 to the auxiliary evaporation portion 52, while the heat exchange tube 6 disposed in the auxiliary evaporation portion 52 is connected to the cold water inlet pipe. Since it is connected to 61 to form an oil concentrating section and the oil return pipe 12 is connected to the liquid area of the auxiliary evaporating section 52, the refrigerant liquid of the auxiliary evaporating section 52 is circulated through a cooling unit or the like to reach a high temperature, Heat is exchanged by the high-temperature return cold water taken in from the cold water inlet pipe 61, so that the refrigerant liquid in the auxiliary evaporating part 52 is actively heated by the high-temperature cold water to actively evaporate the refrigerant liquid. This is because the refrigerant liquid flowing in from the refrigerant liquid inlet 7 is once introduced into the main evaporation portion 51 and then from the main evaporation portion 51 to the auxiliary evaporation portion 52. , The auxiliary evaporation section 2 definitive refrigerant liquid is the oil can be made with the refrigerant liquid of concentrated oil-rich.
【００３５】以上のように、前記補助蒸発部５２におい
て油の濃縮を行うことができるので、前記満液式蒸発器
内において油を濃縮することができ、従来のように、ヒ
ータをもった冷媒加熱器や熱交換器などを別途設ける必
要がなく、また、配管構成も、前記油戻し管１２を設け
るだけなので簡単にできるのであって、油を濃縮させる
ための機器類を無くすことができ、かつ、配管構成も簡
単にできながら満液式蒸発器内の油を前記圧縮機に有効
に戻すことができるのである。As described above, since the oil can be concentrated in the auxiliary evaporator 52, the oil can be concentrated in the liquid-filled evaporator, and the refrigerant having a heater as in the conventional case. It is not necessary to separately provide a heater or a heat exchanger, and the piping configuration can be simplified because only the oil return pipe 12 is provided. Therefore, equipment for concentrating oil can be eliminated, In addition, the oil in the full-fill type evaporator can be effectively returned to the compressor while the piping structure can be simplified.
【００３６】また、前記胴体５における補助蒸発部５２
の液域から主蒸発部５１上方のガス域に斜め上方に延び
る整流板１３を設け、この整流板１３の補助蒸発部５２
側上方に前記冷媒ガス出口９を設けて冷媒ガス出口管１
０を接続すると共に、前記整流板１３の傾斜下端側で前
記補助蒸発部５２の液域に浸漬する下端部に、該補助蒸
発部５２の液域を前記整流板１３の上面側に開口する油
戻し通路１３ｂを設けることにより、前記主蒸発部５１
と補助蒸発部５２とにおいて、前記熱交換チューブ６と
の接触により蒸発された冷媒ガスを前記整流板１３を通
過させて整流した後、前記冷媒ガス出口管１０を経て前
記圧縮機１側へと良好に送ることができながら、この整
流板１３の整流作用により、運転時に、該整流板１３に
対し上面側の圧力、つまり、二次側圧力が、前記主蒸発
部５１及び補助蒸発部５２を構成する下面側の圧力、つ
まり、一次側圧力より低圧になることを利用して、この
差圧により前記補助蒸発部５２で油が濃縮された冷媒液
を、前記油戻し通路１３ｂから前記整流板１３の上面側
へと吸い上げて、該整流板１３を経て前記冷媒ガス出口
管１０から流出される冷媒ガスと共に圧縮機に戻すこと
ができるのであり、従って、従来のように、冷媒加熱器
又は熱交換器などを別途設けたり、また、これら冷媒加
熱器等で油が濃縮された冷媒液を圧縮機に送るためのポ
ンプ又はエゼクタ等も特別に設ける必要なく前記圧縮機
に戻すことができるのである。しかも、この場合、前記
整流板１３から前記冷媒ガス出口管１０を介して前記圧
縮機に戻せるので、油戻し管も設ける必要もなくなっ
て、余分な配管も無くすことができるのである。Further, the auxiliary evaporation portion 52 in the body 5
The straightening vane 13 extending obliquely upward from the liquid region of the above to the gas region above the main evaporating part 51 is provided, and the auxiliary vaporizing part 52 of this straightening plate 13 is provided.
The refrigerant gas outlet 9 is provided on the upper side to provide the refrigerant gas outlet pipe 1
0 is connected to the lower end of the rectifying plate 13 which is immersed in the liquid region of the auxiliary evaporating portion 52 at the lower end side of the rectifying plate 13, and oil which opens the liquid region of the auxiliary evaporating portion 52 to the upper surface side of the rectifying plate 13 By providing the return passage 13b, the main evaporation portion 51
In the auxiliary evaporation section 52, the refrigerant gas evaporated by contact with the heat exchange tube 6 is rectified by passing through the rectifying plate 13, and then to the compressor 1 side via the refrigerant gas outlet pipe 10. While it can be sent well, the rectifying action of the rectifying plate 13 causes the pressure on the upper surface side of the rectifying plate 13, that is, the secondary side pressure, to cause the main evaporator 51 and the auxiliary evaporator 52 to operate. By utilizing the pressure on the lower surface side, that is, the pressure lower than the primary side pressure, the refrigerant liquid in which the oil is concentrated in the auxiliary evaporation portion 52 due to this differential pressure is transferred from the oil return passage 13b to the straightening plate. It can be sucked up to the upper surface side of 13 and returned to the compressor together with the refrigerant gas flowing out of the refrigerant gas outlet pipe 10 through the rectifying plate 13, and thus, as in the conventional case, the refrigerant heater or the heat generator. Exchanger etc. Separately or provided, also, it is the oil in these refrigerant heater and the like can be returned without the need the compressor provided specially well pump or ejector or the like for sending to the compressor the refrigerant liquid which has been concentrated. Moreover, in this case, since it is possible to return from the straightening vane 13 to the compressor through the refrigerant gas outlet pipe 10, there is no need to provide an oil return pipe, and extra piping can be eliminated.
【００３７】さらに、前記胴体５における補助蒸発部５
２の上方から主蒸発部５１の上方に斜め上方に延びる前
記整流板１３を設け、この整流板１３の補助蒸発部５２
側上方に前記冷媒ガス出口９を設けて前記冷媒ガス出口
管１０を接続すると共に、前記補助蒸発部５２の液域に
油戻し管１４を接続し、該油戻し管１４を、前記冷媒ガ
ス出口管１０内に突入させ、この冷媒ガス出口管１０の
下流側に向けて開口させることにより、エゼクタ作用
で、前記補助蒸発部５２で油が濃縮された冷媒液を、前
記整流板１３を経て前記冷媒ガス出口管１０から流出さ
れる冷媒ガスと共に圧縮機に戻すことができるのであ
る。従って、この場合も、前記補助蒸発部５２と前記冷
媒ガス出口管１０とを結ぶ油戻し管１４を設けるだけで
よいので、配管構成を簡素化することができるのであ
る。Further, the auxiliary evaporation section 5 in the body 5
The straightening plate 13 extending obliquely upward from above 2 above the main evaporation part 51 is provided, and the auxiliary evaporation part 52 of this straightening plate 13 is provided.
The refrigerant gas outlet 9 is provided on the upper side to connect the refrigerant gas outlet pipe 10, and the oil return pipe 14 is connected to the liquid region of the auxiliary evaporating portion 52, and the oil return pipe 14 is connected to the refrigerant gas outlet. By causing the refrigerant liquid to rush into the pipe 10 and open toward the downstream side of the refrigerant gas outlet pipe 10, the refrigerant liquid in which the oil is concentrated in the auxiliary evaporation portion 52 by the ejector action is passed through the rectifying plate 13 to It can be returned to the compressor together with the refrigerant gas flowing out from the refrigerant gas outlet pipe 10. Therefore, also in this case, since it is only necessary to provide the oil return pipe 14 that connects the auxiliary evaporation portion 52 and the refrigerant gas outlet pipe 10, it is possible to simplify the pipe configuration.
【００３８】しかも、運転停止時、前記胴体５内におけ
る冷媒液の液面が前記仕切体１１の上壁部より高くなる
ことがあっても、前記整流板１３上に冷媒液が入り込ん
で溜ることがないから、運転再開時に、前記整流板１３
上に溜る冷媒液が前記冷媒ガス出口管１０から前記圧縮
機１に多量に戻る所謂液バックの危険性を回避すること
もできる。Moreover, even if the liquid level of the refrigerant liquid in the body 5 becomes higher than the upper wall portion of the partition body 11 when the operation is stopped, the refrigerant liquid enters and collects on the rectifying plate 13. Therefore, when the operation is restarted, the rectifying plate 13
It is possible to avoid the risk of so-called liquid bag in which a large amount of the refrigerant liquid accumulated above returns from the refrigerant gas outlet pipe 10 to the compressor 1.
【００３９】また、前記補助蒸発部５２に、該補助蒸発
部５２の液面高さを検出し、液面高さ制御器１７を制御
する液面検出器１５を備えることにより、前記液面検出
器１５で前記補助蒸発部５２の液面高さを検出して、こ
の検出結果に基づく前記制御器１７からの出力により前
記流量調整弁１６の開度制御を行うことができ、この結
果、前記冷媒液入口管７から前記胴体５の主蒸発部５１
内に導入される冷媒量を、前記仕切板１１の上部高さよ
りも常に低位となるように調整制御できるのであり、従
って、前記主蒸発部５１から補助蒸発部５２に多量の冷
媒液が導入されることによる油濃度低下を防止すること
ができ、油濃縮度の高い冷媒液を前記圧縮機に戻すこと
ができるのである。Further, by providing the auxiliary evaporation unit 52 with a liquid level detector 15 for detecting the liquid level height of the auxiliary evaporation unit 52 and controlling the liquid level height controller 17, the liquid level detection It is possible to detect the liquid surface height of the auxiliary evaporation section 52 with the device 15, and to control the opening degree of the flow rate adjusting valve 16 by the output from the controller 17 based on the detection result. From the refrigerant liquid inlet pipe 7 to the main evaporation portion 51 of the body 5
The amount of the refrigerant introduced into the inside can be adjusted and controlled so that it is always lower than the height of the upper part of the partition plate 11. Therefore, a large amount of the refrigerant liquid is introduced from the main evaporation part 51 to the auxiliary evaporation part 52. It is possible to prevent a decrease in oil concentration due to this, and to return the refrigerant liquid having a high oil concentration to the compressor.
【図１】本発明の満液式蒸発器の第１実施例を示す縦断
面図である。FIG. 1 is a vertical cross-sectional view showing a first embodiment of a liquid-filled evaporator according to the present invention.
【図２】同第１実施例の満液式蒸発器の全体構造を示す
斜視図である。FIG. 2 is a perspective view showing the overall structure of a liquid-filled evaporator according to the first embodiment.
【図３】同第１実施例の満液式蒸発器を用いた冷凍装置
の配管図である。FIG. 3 is a piping diagram of a refrigerating apparatus using the liquid-filled evaporator of the first embodiment.
【図４】本発明の満液式蒸発器の第２実施例を示す縦断
面図である。FIG. 4 is a vertical cross-sectional view showing a second embodiment of the liquid-filled evaporator of the present invention.
【図５】同第２実施例で用いる整流板の一部省略した正
面図である。FIG. 5 is a front view in which a part of a current plate used in the second embodiment is omitted.
【図６】本発明の満液式蒸発器の第３実施例を示す縦断
面図である。FIG. 6 is a vertical cross-sectional view showing a third embodiment of the liquid-filled evaporator of the present invention.
【図７】本発明の満液式蒸発器に液面検出器を設けた実
施例を示す配管図である。FIG. 7 is a piping diagram showing an embodiment in which a liquid level detector is provided in the liquid-filled evaporator of the present invention.
【図８】従来の満液式蒸発器を示す縦断面図である。FIG. 8 is a vertical sectional view showing a conventional liquid-filled evaporator.
５ 胴体 ５１ 蒸発部 ５２ 補助蒸発部 ６ 熱交換チューブ ６１ 冷水入口管 ６２ 冷水出口管 ７ 冷媒液入口 ９ 冷媒ガス出口 １０ 冷媒ガス出口管 １１ 仕切体 １２，１４ 油戻し管 １３ 整流板 １３ｂ 油戻し通路 １５ 液面検出器 １７ 液面高さ制御器 5 Body 51 Evaporating Part 52 Auxiliary Evaporating Part 6 Heat Exchange Tube 61 Cold Water Inlet Pipe 62 Cold Water Outlet Pipe 7 Refrigerant Liquid Inlet 9 Refrigerant Gas Outlet 10 Refrigerant Gas Outlet Pipe 11 Partition 12, 14 Oil Return Pipe 13 Rectifier 13b Oil Return Passage 15 Liquid level detector 17 Liquid level height controller
Claims (4)
体（５）の下部に配設され、冷水入口管（６１）及び冷
水出口管（６２）を接続する熱交換チューブ（６）とを
備え、前記胴体（５）の下部に冷媒液入口（７）を、上
部に冷媒ガス出口（９）を設け、前記胴体（５）内に導
入する液冷媒を前記熱交換チューブ（６）内を流通する
冷水と熱交換させることにより液冷媒を蒸発させる満液
式蒸発器であって、前記胴体（５）内の一側に長さ方向
に延びる仕切体（１１）を設けて、前記胴体（５）にお
ける液域を主蒸発部（５１）と補助蒸発部（５２）とに
区画すると共に、前記主蒸発部（５１）に前記冷媒液入
口（７）を設けて、前記主蒸発部（５１）から補助蒸発
部（５２）に冷媒液を導入するようになす一方、前記補
助蒸発部（５２）に配設する熱交換チューブ（６）を前
記冷水入口管（６１）に接続して油濃縮部を形成し、前
記補助蒸発部（５２）の液域に油戻し管（１２）を接続
していることを特徴とする満液式蒸発器。1. A heat exchange tube (6), which is provided with a horizontally elongated body (5) extending substantially horizontally and a cold water inlet pipe (61) and a cold water outlet pipe (62) which are arranged at a lower portion of the body (5). And a refrigerant liquid inlet (7) at the lower part of the body (5) and a refrigerant gas outlet (9) at the upper part of the body (5) to introduce the liquid refrigerant introduced into the body (5) into the heat exchange tube (6). A full-liquid type evaporator for evaporating a liquid refrigerant by exchanging heat with cold water flowing inside, wherein a partition body (11) extending in the length direction is provided on one side of the body (5), The liquid area in the body (5) is divided into a main evaporation part (51) and an auxiliary evaporation part (52), and the main liquid evaporation part (51) is provided with the refrigerant liquid inlet (7) to provide the main evaporation part. While the refrigerant liquid is introduced from the (51) to the auxiliary evaporation section (52), the auxiliary evaporation section (52) is also introduced. The heat exchange tube (6) to be arranged is connected to the cold water inlet pipe (61) to form an oil concentrating portion, and the oil return pipe (12) is connected to the liquid region of the auxiliary evaporation portion (52). A liquid-filled evaporator characterized in that
液域から主蒸発部（５１）上方のガス域に斜め上方に延
びる整流板（１３）を設け、この整流板（１３）の補助
蒸発部（５２）側上方に冷媒ガス出口（９）を設けて、
冷媒ガス出口管（１０）を接続すると共に、前記整流板
（１３）の傾斜下端側で前記補助蒸発部（５２）の液域
に浸漬する下端部に、該補助蒸発部（５２）の液域を前
記整流板（１３）の上面側に開口する油戻し通路（１３
ｂ）を設けている請求項１記載の満液式蒸発器。2. A straightening vane (13) extending obliquely upward from a liquid region of the auxiliary vaporizing part (52) in the body (5) to a gas region above the main vaporizing part (51) is provided. A refrigerant gas outlet (9) is provided above the auxiliary evaporation section (52),
The liquid area of the auxiliary evaporation part (52) is connected to the refrigerant gas outlet pipe (10) and is immersed in the liquid area of the auxiliary evaporation part (52) at the lower inclined side of the rectifying plate (13). Oil return passage (13
The liquid-filled evaporator according to claim 1, wherein b) is provided.
上方から主蒸発部（５１）の上方に斜め上方に延びる整
流板（１３）を設け、この整流板（１３）の補助蒸発部
（５２）側上方に冷媒ガス出口（９）を設けて、冷媒ガ
ス出口管（１０）を接続すると共に、前記補助蒸発部
（５２）の液域に油戻し管（１４）を接続し、該油戻し
管（１４）を、前記冷媒ガス出口管（１０）に突入さ
せ、この冷媒ガス出口管（１０）の下流側に向かって開
口させている請求項１記載の満液式蒸発器。3. A straightening plate (13) extending obliquely upward from above the auxiliary evaporation part (52) of the body (5) above the main evaporation part (51) is provided, and the auxiliary evaporation part of this straightening plate (13). A refrigerant gas outlet (9) is provided above the (52) side to connect the refrigerant gas outlet pipe (10) and an oil return pipe (14) to the liquid region of the auxiliary evaporation section (52). The liquid-filled evaporator according to claim 1, wherein an oil return pipe (14) is projected into the refrigerant gas outlet pipe (10) and opened toward the downstream side of the refrigerant gas outlet pipe (10).
２）の液面高さを検出し、液面高さ制御器（１７）を制
御する液面検出器（１５）を備えている請求項１，２及
び３記載の満液式蒸発器。4. The auxiliary evaporation section (52) is provided with the auxiliary evaporation section (5).
The liquid-filled evaporator according to claim 1, further comprising a liquid level detector (15) for detecting the liquid level height of 2) and controlling a liquid level height controller (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06358393A JP3351001B2 (en) | 1993-03-23 | 1993-03-23 | Liquid-filled evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06358393A JP3351001B2 (en) | 1993-03-23 | 1993-03-23 | Liquid-filled evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06272977A true JPH06272977A (en) | 1994-09-27 |
| JP3351001B2 JP3351001B2 (en) | 2002-11-25 |
Family
ID=13233441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06358393A Expired - Fee Related JP3351001B2 (en) | 1993-03-23 | 1993-03-23 | Liquid-filled evaporator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3351001B2 (en) |
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| CN102563982A (en) * | 2012-02-14 | 2012-07-11 | 温岭市钱江化工机械有限公司 | Evaporating plant in refrigerating system |
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