JPS6269067A - Refrigeration cycle - Google Patents
Refrigeration cycleInfo
- Publication number
- JPS6269067A JPS6269067A JP20645785A JP20645785A JPS6269067A JP S6269067 A JPS6269067 A JP S6269067A JP 20645785 A JP20645785 A JP 20645785A JP 20645785 A JP20645785 A JP 20645785A JP S6269067 A JPS6269067 A JP S6269067A
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- liquid refrigerant
- compressor
- pressure
- ejector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
- F25B2341/0011—Ejectors with the cooled primary flow at reduced or low pressure
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Saccharide Compounds (AREA)
- Fats And Perfumes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は冷凍サイクルに係り、特に圧縮機への液冷媒の
吸入を防止する構成に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a refrigeration cycle, and particularly to a structure for preventing liquid refrigerant from being sucked into a compressor.
ｒＸ８ＦＪＩＪ の 仔委１ ）
従来の冷凍サイクルに於ては圧縮機への液冷媒の吸入を
防止する方法として、例えば特開昭５９−２１９６７８
号公報に示されるようにアキュムレータ内部に液面検知
器を設け、その信号を受けて作動する振動発生器をアキ
ュムレータの底部に設けることにより滞溜した液冷媒を
強制的に霧化して圧縮機に吸入させるものである。しか
しアキュムレータ内に液面検知器、振動発生器を設ける
ために構造が複雑になり、電気配線も必要となり、製作
費用か増加するという点については配慮がされていなか
った。rX8FJIJ subcommittee 1) In the conventional refrigeration cycle, as a method of preventing liquid refrigerant from being sucked into the compressor, for example, Japanese Patent Application Laid-Open No. 59-219678
As shown in the publication, by installing a liquid level detector inside the accumulator and installing a vibration generator at the bottom of the accumulator that operates in response to the signal, the accumulated liquid refrigerant is forcibly atomized and sent to the compressor. It is meant to be inhaled. However, no consideration was given to the fact that the provision of a liquid level detector and a vibration generator within the accumulator complicates the structure, requires electrical wiring, and increases manufacturing costs.
本発明の目的は、簡単な構造の冷凍サイクルにより圧縮
機への液冷媒の吸入防止を図ることにある。An object of the present invention is to prevent liquid refrigerant from being sucked into a compressor using a refrigeration cycle with a simple structure.
この目的を達成するために蒸発器と圧縮機の中間に液冷
媒分離器を設け、蒸発器から気液混合冷媒か送出された
場合には該液冷媒分離器により液冷媒を分離して減圧機
構と蒸発器の中間に設けたエジェクターにより液冷媒を
吸引して蒸発器入口に戻し、ガス冷媒のみ圧縮機に吸入
せしめて該圧縮機の液圧縮による弁類の損傷や潤滑不良
等の信頼性の阻害要因を除去するものである。To achieve this purpose, a liquid refrigerant separator is provided between the evaporator and the compressor, and when a gas-liquid mixed refrigerant is delivered from the evaporator, the liquid refrigerant is separated by the liquid refrigerant separator and a pressure reduction mechanism is created. An ejector installed between the evaporator and the liquid refrigerant sucks the liquid refrigerant and returns it to the evaporator inlet, allowing only the gas refrigerant to be sucked into the compressor. It removes inhibiting factors.
以下、本発明の一実施例を第１図の冷凍サイクル図と、
第２図のエジェクターの構造を示す断面図により説明す
る。圧縮機１から高温高圧のガス冷媒か吐出されて凝縮
器２に導かれ、該凝縮器２で凝縮潜熱を放熱して高圧液
冷媒となる。この高圧液冷媒は、減圧機構３を通過して
低温低圧の気液混合冷媒となり、エジェクター圭を介し
て蒸発器５に入り該蒸発器５で蒸発潜熱を吸熱して低圧
ガス冷媒になる。この低圧ガス冷媒は、液冷媒分離器６
を介して圧縮機ｌに吸入される。また、前記液冷媒分離
器６の底部には配管８か接続され、他端はエジェクター
生に接続されている。このエジェクター生の構造は第２
図に示す通りであり、減圧機構３と接続される配管７の
先端かノズルを形成し、蒸発器５入口と接続される配管
９がディフューザを形成している。該ディフューザーの
入口に形成された背圧部１０には配管８か接続されてい
る。このような冷凍サイクルにおいては、ノズルから流
出する気液混合冷媒の流速により背圧部１０の圧力か低
下する。該背圧部１０の圧力低下は△Ｐ；γ・Ｖ”／２
ｇ （ただしｒ：冷媒の比重量、■＝冷媒流速、ｇ：
重力加速度）である。従って、蒸発器５を通過するため
の冷媒の圧力損失により液冷媒分離器６内の圧力が蒸発
器５入口の圧力より低下しても、配管７で形成されるノ
ズル径を適正に定めることにより、背圧部１０内の圧力
が液冷媒分離器内の圧力より低下して背圧部１０に液冷
媒分離器６内の液冷媒を吸引することかでさる。Hereinafter, one embodiment of the present invention will be described with reference to the refrigeration cycle diagram in FIG.
This will be explained with reference to a sectional view showing the structure of the ejector shown in FIG. A high-temperature, high-pressure gas refrigerant is discharged from the compressor 1 and guided to a condenser 2, where it radiates latent heat of condensation and becomes a high-pressure liquid refrigerant. This high-pressure liquid refrigerant passes through the pressure reducing mechanism 3 to become a low-temperature, low-pressure gas-liquid mixed refrigerant, enters the evaporator 5 via the ejector, absorbs latent heat of vaporization in the evaporator 5, and becomes a low-pressure gas refrigerant. This low pressure gas refrigerant is transferred to the liquid refrigerant separator 6
is sucked into the compressor l via the. Further, a pipe 8 is connected to the bottom of the liquid refrigerant separator 6, and the other end is connected to an ejector. This ejector raw structure is the second
As shown in the figure, the tip of the pipe 7 connected to the pressure reducing mechanism 3 forms a nozzle, and the pipe 9 connected to the inlet of the evaporator 5 forms a diffuser. A pipe 8 is connected to a back pressure section 10 formed at the inlet of the diffuser. In such a refrigeration cycle, the pressure in the back pressure section 10 decreases depending on the flow rate of the gas-liquid mixed refrigerant flowing out from the nozzle. The pressure drop in the back pressure section 10 is △P;γ・V''/2
g (where r: specific weight of refrigerant, ■= refrigerant flow rate, g:
gravitational acceleration). Therefore, even if the pressure inside the liquid refrigerant separator 6 drops below the pressure at the inlet of the evaporator 5 due to the pressure loss of the refrigerant passing through the evaporator 5, it is possible to , the pressure inside the back pressure section 10 becomes lower than the pressure inside the liquid refrigerant separator 6, and the liquid refrigerant inside the liquid refrigerant separator 6 is sucked into the back pressure section 10.
従って冷凍サイクルの運転の断続時や始動時等に一時的
に蒸発器５出口から気液混合冷媒か流出しても、液冷媒
分離器６により液冷媒とガス冷媒に分離された液冷媒が
配管８からエジェクター土を介して蒸発器５の入口に戻
すことかでさる。したがって、ガス冷媒のみを圧縮機１
に吸入させることかできるので、該圧縮機１の液圧縮を
防止して信頼性を高めることかできる。Therefore, even if the gas-liquid mixed refrigerant temporarily flows out from the evaporator 5 outlet during intermittent operation or startup of the refrigeration cycle, the liquid refrigerant separated into liquid refrigerant and gas refrigerant by the liquid refrigerant separator 6 will flow through the pipes. 8 and return it to the inlet of the evaporator 5 via the ejector soil. Therefore, only the gas refrigerant is transferred to the compressor 1.
Since the liquid can be sucked into the compressor 1, it is possible to prevent liquid compression in the compressor 1 and improve reliability.
本発明によれば、蒸発器５と圧縮機１の中間に設けた液
冷媒分離器６内に滞溜した液冷媒を速やかにエジェクタ
ー生により蒸発器５の入口に戻すことができるので、圧
縮機の液冷媒圧縮を防止して該圧縮機の信頼性を確保で
きる。According to the present invention, the liquid refrigerant accumulated in the liquid refrigerant separator 6 provided between the evaporator 5 and the compressor 1 can be quickly returned to the inlet of the evaporator 5 by the ejector. The reliability of the compressor can be ensured by preventing compression of the liquid refrigerant.
第１図は本発明の一実施例を具備した冷）東サイクル図
、第２図は第１図に用いるエジェクターの構造断面図で
ある。
１・・・圧縮機、２・・・凝縮器、３・・・減圧機檄土
・・・エジェクター、５・・・蒸発器、６・・・液冷媒
分離器。
代理人 弁理士 小 川 勝 男゛ヘ−′Ｖ−１図
’Ｎ２１２］
１ 手FIG. 1 is a diagram of a refrigeration cycle equipped with an embodiment of the present invention, and FIG. 2 is a structural sectional view of the ejector used in FIG. 1. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Condenser, 3... Pressure reducer... Ejector, 5... Evaporator, 6... Liquid refrigerant separator. Agent: Patent Attorney Masaru Ogawa゛He-'V-1 Diagram'N212] 1 move
Claims (1)
器、圧縮機の順に接続されて成る冷媒順環路を備えた冷
凍サイクルにおいて、前記減圧機構と蒸発器の間にエジ
ェクターを備え、該エジェクターが減圧機構の出口と接
続された配管で形成されたノズルと、蒸発器入口と接続
された配管で形成されたディフューザー部と、該ディフ
ューザー部の入口に形成された背圧部とから構成され、
前記ノズルの先端か前記ディフューザーの入口部に位置
し、前記背圧部に液冷媒分離器の底部に接続された配管
が接続されて成ることを特徴とする冷凍サイクル。1. A refrigeration cycle equipped with a refrigerant sequential circuit in which a compressor, a condenser, a pressure reduction mechanism, an evaporator, a liquid refrigerant separator, and a compressor are connected in this order, an ejector is provided between the pressure reduction mechanism and the evaporator, and an ejector is provided between the pressure reduction mechanism and the evaporator. The ejector is composed of a nozzle formed by piping connected to the outlet of the pressure reducing mechanism, a diffuser part formed by piping connected to the evaporator inlet, and a back pressure part formed at the inlet of the diffuser part. ,
A refrigeration cycle characterized in that a pipe is located at the tip of the nozzle or at the inlet of the diffuser and is connected to the back pressure section, which is connected to the bottom of a liquid refrigerant separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20645785A JPS6269067A (en) | 1985-09-20 | 1985-09-20 | Refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20645785A JPS6269067A (en) | 1985-09-20 | 1985-09-20 | Refrigeration cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6269067A true JPS6269067A (en) | 1987-03-30 |
Family
ID=16523693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20645785A Pending JPS6269067A (en) | 1985-09-20 | 1985-09-20 | Refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6269067A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05149633A (en) * | 1991-11-28 | 1993-06-15 | Nissin Kogyo Kk | Method and device for disposing low pressure refrigerant liquid for freezing device |
-
1985
- 1985-09-20 JP JP20645785A patent/JPS6269067A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05149633A (en) * | 1991-11-28 | 1993-06-15 | Nissin Kogyo Kk | Method and device for disposing low pressure refrigerant liquid for freezing device |
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