JPH1194368A - Freezing cycle device - Google Patents

Freezing cycle device

Info

Publication number
JPH1194368A
JPH1194368A JP27398397A JP27398397A JPH1194368A JP H1194368 A JPH1194368 A JP H1194368A JP 27398397 A JP27398397 A JP 27398397A JP 27398397 A JP27398397 A JP 27398397A JP H1194368 A JPH1194368 A JP H1194368A
Authority
JP
Japan
Prior art keywords
gas
compressor
valve
pipe
refrigeration cycle
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
Application number
JP27398397A
Other languages
Japanese (ja)
Other versions
JP3592500B2 (en
Inventor
Masahiro Shin
正▲廣▼ 新
Shigeto Yamaguchi
成人 山口
Yuichi Kusumaru
雄一 薬丸
Shinji Watanabe
伸二 渡辺
Hideo Hirano
秀夫 平野
Koji Murozono
宏治 室園
Shigeru Narai
茂 成相
Satoshi Tokura
聡 十倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP27398397A priority Critical patent/JP3592500B2/en
Publication of JPH1194368A publication Critical patent/JPH1194368A/en
Application granted granted Critical
Publication of JP3592500B2 publication Critical patent/JP3592500B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators

Landscapes

  • Applications Or Details Of Rotary Compressors (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a freezing cycle device which is so arranged as to suppress the frequency drop caused by the pressure pulsation of a compressor by adding a little structural change while utilizing, as it is, the basic structure of a freezing cycle device being so arranged as to perform gas injection. SOLUTION: A freezing cycle device 1, where a check valve 11 and an opening and closing valve 10 are interposed, in order toward the side of a gas-liquid separator, in a gas injection pipe 9, is equipped with a bypass pipe 15 which connects a gas injection pipe 9 between the opening and closing valve 10 and the check valve 11 with the suction port 4a of the compressor 4 or the low- pressure pipe on suction side, and a bypass valve 16 which is interposed in the bypass pipe 15 and breaks the bypass pipe 15 by closing the bypass pipe 15 when the opening and closing valve 10 is in open condition and opens the bypass pipe 15 by opening it when the opening and closing valve 10 is in closed condition.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、気液分離器を備
え、この気液分離器で分離した後のガス成分を、運転状
態に応じて、圧縮機にインジェクションするようにした
冷凍サイクル装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration cycle apparatus having a gas-liquid separator and injecting a gas component separated by the gas-liquid separator into a compressor in accordance with an operation state. .

【０００２】[0002]

【従来の技術】冷凍サイクル装置として、実開平１ー１
３４８５７号公報に見られるように、冷凍サイクルを構
成する要素に気液分離器を加えて、この気液分離器で分
離した後のガス成分を圧縮機にインジェクションすると
共に、このガス成分を導くガスインジェクション管に電
磁式の開閉弁及び逆止弁を介装することが提案されてい
る。これによれば、ガスインジェクションによる高出力
運転から開閉弁が閉じられて通常運転に切り替えられた
状態で、圧縮機の作動停止により圧縮機側の圧力が気液
分離器側の圧力よりも高くなったときであっても、逆止
弁により圧縮機から開閉弁への冷媒ガスの逆流を防止し
て開閉弁のチャタリングを防止することができるという
利点がある。2. Description of the Related Art As a refrigeration cycle apparatus, Japanese Utility Model No. 1-1
As disclosed in Japanese Patent No. 34857, a gas-liquid separator is added to the components of the refrigeration cycle, and the gas component separated by the gas-liquid separator is injected into a compressor, and the gas for guiding the gas component is introduced. It has been proposed to interpose an electromagnetic on-off valve and a check valve in an injection pipe. According to this, in a state where the on-off valve is closed and the operation is switched to the normal operation from the high output operation by the gas injection, the pressure on the compressor side becomes higher than the pressure on the gas-liquid separator side by stopping the operation of the compressor. Even in such a case, there is an advantage that the check valve can prevent the backflow of the refrigerant gas from the compressor to the on-off valve, thereby preventing chattering of the on-off valve.

【０００３】[0003]

【発明が解決しようとする課題】さて、冷凍サイクル装
置においては、広く一般的に、圧縮機の圧力脈動による
圧縮ロスの問題を有し、特に低負荷で圧縮比が小さくな
るほど圧縮機の圧力脈動が大きくなる傾向にあることか
ら、この圧力脈動によって圧縮ロスが発生して効率が低
下するという問題を有している。The refrigeration cycle apparatus generally has a problem of compression loss due to pressure pulsation of the compressor. In particular, the pressure pulsation of the compressor decreases as the compression ratio decreases at a low load. Therefore, there is a problem that compression loss occurs due to the pressure pulsation and efficiency is reduced.

【０００４】本発明は、このような問題点を鑑みてなさ
れたもので、その目的とするところは、ガスインジェク
ションを行うようにした冷凍サイクル装置の基本構造を
そのまま利用しつつ若干の構造的変更を加えることで圧
縮機の圧力脈動に基づく効率低下を抑えるようした冷凍
サイクル装置を提供することにある。The present invention has been made in view of such a problem, and an object of the present invention is to make a slight structural change while using the basic structure of a refrigeration cycle apparatus for performing gas injection as it is. It is another object of the present invention to provide a refrigeration cycle device that suppresses a decrease in efficiency due to pressure pulsation of the compressor by adding the pressure.

【０００５】[0005]

【課題を解決するための手段】請求項１記載の本発明の
冷凍サイクル装置は、圧縮機の吐出口と吸込口とが、前
記圧縮機の吐出口から吸込口に向って順に、凝縮器、第
１減圧機構、気液分離器、第２減圧機構、蒸発器を介し
て接続されると共に、前記圧縮機には、前記吸込口と別
個独立してインジェクションポートが設けられ、前記イ
ンジェクションポートと前記気液分離器とが、ガスイン
ジェクション管を介して接続され、前記ガスインジェク
ション管に、前記圧縮機側から前記気液分離器側に向っ
て順に、逆止弁、開閉弁が介装されている冷凍サイクル
装置において、前記開閉弁と前記逆止弁との間の前記ガ
スインジェクション管と前記圧縮機の吸込口又は吸入側
の低圧ガス配管とを連通させるバイパス管と、前記バイ
パス管に介装され、前記開閉弁が開状態にあるときに閉
じて前記バイパス管を遮断し、前記開閉弁が閉状態にあ
るときに開として前記バイパス管を開通させるバイパス
弁とを備えていることを特徴とする。According to a first aspect of the present invention, there is provided a refrigeration cycle apparatus according to the present invention, wherein a discharge port and a suction port of a compressor are arranged in order from a discharge port of the compressor to a suction port. The compressor is connected via a first pressure reducing mechanism, a gas-liquid separator, a second pressure reducing mechanism, and an evaporator, and the compressor is provided with an injection port separately and independently of the suction port. A gas-liquid separator is connected via a gas injection pipe, and the gas injection pipe is provided with a check valve and an open / close valve in order from the compressor side to the gas-liquid separator side. In the refrigeration cycle device, a bypass pipe communicating between the gas injection pipe between the on-off valve and the check valve and a low-pressure gas pipe on a suction port or a suction side of the compressor is interposed in the bypass pipe. Closed when the closing valve is open and shut off the bypass pipe, the on-off valve is characterized in that it comprises a bypass valve for opening said bypass pipe is opened when in the closed state.

【０００６】請求項２記載の本発明の冷凍サイクル装置
は、請求項１に記載の冷凍サイクル装置において、前記
開閉弁が、前記冷凍サイクル装置の負荷状態に応じて開
閉制御されることを特徴とする。請求項３記載の本発明
の冷凍サイクル装置は、圧縮機の吐出口と吸込口とが、
前記圧縮機の吐出口から吸込口に向って順に、凝縮器、
第１減圧機構、気液分離器、第２減圧機構、蒸発器を介
して接続されると共に、前記圧縮機には、前記吸込口と
別個独立してインジェクションポートが設けられ、前記
インジェクションポートと前記気液分離器とが、ガスイ
ンジェクション管を介して接続され、前記ガスインジェ
クション管に、逆止弁が介装されている冷凍サイクル装
置において、前記気液分離器と前記逆止弁との間の前記
ガスインジェクション管と前記圧縮機の吸入口又は吸込
口側の低圧ガス配管とを連通させるバイパス管と、前記
バイパス管と前記ガス通路との接続位置に設けられ、前
記ガスインジェクション管と前記バイパス管とを選択的
に開閉する三方弁とを備えていることを特徴とする。請
求項４記載の本発明の冷凍サイクル装置は、請求項３に
記載の冷凍サイクル装置において、前記三方弁が、前記
冷凍サイクル装置の負荷状態に応じて切替制御されるこ
とを特徴とする。請求項５記載の本発明の冷凍サイクル
装置は、請求項１から請求項４のいずれかに記載の冷凍
サイクル装置において、前記逆止弁が前記圧縮機に内蔵
されていることを特徴とする。According to a second aspect of the present invention, there is provided a refrigeration cycle apparatus according to the first aspect, wherein the on-off valve is controlled to open and close according to a load state of the refrigeration cycle apparatus. I do. In the refrigeration cycle device according to the third aspect of the present invention, the discharge port and the suction port of the compressor are:
In order from the discharge port of the compressor to the suction port, a condenser,
The compressor is connected via a first pressure reducing mechanism, a gas-liquid separator, a second pressure reducing mechanism, and an evaporator, and the compressor is provided with an injection port separately and independently of the suction port. A gas-liquid separator is connected via a gas injection pipe, and in the refrigeration cycle apparatus, in which a check valve is interposed in the gas injection pipe, the gas-liquid separator is connected between the gas-liquid separator and the check valve. A bypass pipe for communicating the gas injection pipe with a low-pressure gas pipe on a suction port or a suction port side of the compressor, and a bypass pipe provided at a connection position between the bypass pipe and the gas passage, wherein the gas injection pipe and the bypass pipe are provided. And a three-way valve for selectively opening and closing the two. According to a fourth aspect of the present invention, there is provided a refrigeration cycle apparatus according to the third aspect, wherein the three-way valve is switch-controlled in accordance with a load state of the refrigeration cycle apparatus. A refrigeration cycle apparatus according to a fifth aspect of the present invention is the refrigeration cycle apparatus according to any one of the first to fourth aspects, wherein the check valve is built in the compressor.

【０００７】[0007]

【発明の実施の形態】本発明の第１の実施の形態によれ
ば、ガスインジェクションを行う冷凍サイクル装置に、
単にパイパス管を追加してこのバイパス管を圧縮機の吸
入口とガスインジェクション管とに接続するだけで、特
に低負荷でその傾向が大きくなる圧縮機の圧力脈動をバ
イパス管に誘引してこれを減衰することができる。した
がって、ガスインジェクションを行うために必要とされ
るガスインジェクション管、逆止弁及び開閉弁を、この
ガスインジェクションを行わない通常運転状態において
も活用して圧縮機の圧力脈動による圧縮ロスを低減する
ことができ、比較的低コストで圧力脈動に基づく効率の
低下を抑えることができる。本発明の第２の実施の形態
によれば、バイパス管の開閉を制御するバイパス弁が、
冷凍サイクル装置の負荷状態に応じて制御されることか
ら、特に低負荷時に問題となり易い圧縮機の圧力脈動に
対処するのに合理的である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first embodiment of the present invention, a refrigeration cycle apparatus for performing gas injection includes:
Simply adding a bypass pipe and connecting this bypass pipe to the compressor inlet and gas injection pipe will induce the pressure pulsation of the compressor, which tends to increase especially at low load, to the bypass pipe and Can be attenuated. Therefore, a gas injection pipe, a check valve, and an on-off valve required for performing gas injection are utilized even in a normal operation state in which the gas injection is not performed to reduce compression loss due to pressure pulsation of the compressor. Therefore, it is possible to suppress a decrease in efficiency due to pressure pulsation at a relatively low cost. According to the second embodiment of the present invention, the bypass valve for controlling the opening and closing of the bypass pipe includes:
Since the control is performed in accordance with the load state of the refrigeration cycle device, it is reasonable to deal with the pressure pulsation of the compressor, which tends to be a problem particularly at a low load.

【０００８】また、本発明の第３の実施の形態によれ
ば、バイパス管とガスインジェクションのためのガスイ
ンジェクション管との接続位置に、前記開閉弁及び前記
バイパス弁の機能を有する三方弁が設置されているた
め、装置のコンパクト化を図ることができると共に、制
御の応答性を向上させることができ、さらには、ランニ
ングコストの低減を図ることもできる。本発明の第４の
実施の形態によれば、三方弁の切替が、冷凍サイクル装
置の負荷状態に応じて制御されることから、特に低負荷
時に問題となり易い圧縮機の圧力脈動に対処するのに合
理的である。また、本発明の第５の実施の形態によれ
ば、逆止弁が圧縮機に内蔵されていることから、圧縮機
から逆止弁までのデッドボリュームを少なくすることが
でき、さらには、圧力脈動ロスを低減して圧縮機効率の
低下を抑制できる。According to the third embodiment of the present invention, a three-way valve having the functions of the on-off valve and the bypass valve is installed at the connection position between the bypass pipe and the gas injection pipe for gas injection. Therefore, the size of the apparatus can be reduced, the responsiveness of control can be improved, and the running cost can be reduced. According to the fourth embodiment of the present invention, the switching of the three-way valve is controlled in accordance with the load state of the refrigeration cycle apparatus. It is reasonable. Further, according to the fifth embodiment of the present invention, since the check valve is built in the compressor, the dead volume from the compressor to the check valve can be reduced, and the pressure can be further reduced. Pulsation loss can be reduced, and a decrease in compressor efficiency can be suppressed.

【０００９】[0009]

【実施例】以下本発明の実施例について図面に基づいて
説明する。図1は、第１実施例における冷凍サイクル装
置の全体系統図である。この冷凍サイクル装置１は、冷
凍サイクルの基本的な構成要素である凝縮器２、蒸発器
３、圧縮機４、減圧機構５を有し、凝縮器２と蒸発器３
とを接続する一方側の配管６に圧縮機４が介装され、他
方側の配管７に減圧機構５が介装されて、全体として一
つの冷媒循環経路が形成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall system diagram of the refrigeration cycle device in the first embodiment. This refrigeration cycle apparatus 1 includes a condenser 2, an evaporator 3, a compressor 4, and a decompression mechanism 5, which are basic components of the refrigeration cycle.
The compressor 4 is interposed in the pipe 6 on one side and the pressure reducing mechanism 5 is interposed in the pipe 7 on the other side to form one refrigerant circulation path as a whole.

【００１０】冷凍サイクル装置１に含まれる減圧機構５
は、第１減圧機構５ａと第２減圧機構５ｂとで構成され
ている。第１減圧機構５ａは、凝縮器２から流出した高
圧状態の凝縮液を中間圧力まで膨張させる役割を担い、
第２減圧機構５ｂは、中間圧力の凝縮液を更に低い所定
の低圧状態まで膨張させる役割を担う。これら第１、第
２の減圧機構５ａ、５ｂの間には、第１減圧機構５ａに
より膨張された冷媒ガスを液体成分とガス部分とに分離
する気液分離器８が配設され、この気液分離器８で分離
された後の冷媒ガスの液体成分が第２減圧機構５に向け
て供給される。The pressure reducing mechanism 5 included in the refrigeration cycle apparatus 1
Is composed of a first pressure reducing mechanism 5a and a second pressure reducing mechanism 5b. The first pressure reducing mechanism 5a plays a role of expanding the high-pressure condensate flowing out of the condenser 2 to an intermediate pressure,
The second pressure reducing mechanism 5b plays a role of expanding the condensate at the intermediate pressure to a predetermined lower pressure state. A gas-liquid separator 8 for separating the refrigerant gas expanded by the first pressure reducing mechanism 5a into a liquid component and a gas portion is disposed between the first and second pressure reducing mechanisms 5a and 5b. The liquid component of the refrigerant gas separated by the liquid separator 8 is supplied to the second pressure reducing mechanism 5.

【００１１】圧縮機４は、吸込口４ａ及び吐出口４bと
は別個独立したインジェクションポート４ｃを有する。
上述した気液分離器８は、ガスインジェクション管９及
びインジェクションポート４ｃで形成されるガス通路を
通じて圧縮機４と連通され、この気液分離器８で分離さ
れた後の飽和ガスのガス部分を圧縮機４に導入すること
ができるようになっている。ガスインジェクション管９
には、電磁式の開閉弁１０と逆止弁１１とが介装されて
いる。例えば、暖房運転時において大きな能力が要求さ
れるときには、開閉弁１０が開弁されて、圧縮機４に対
してガスインジェクションが行われる。これにより、冷
凍サイクル装置１は圧縮機４の能力が向上した高出力運
転になる。The compressor 4 has an injection port 4c independent of the suction port 4a and the discharge port 4b.
The above-described gas-liquid separator 8 is communicated with the compressor 4 through a gas passage formed by a gas injection pipe 9 and an injection port 4c, and compresses a gas portion of the saturated gas separated by the gas-liquid separator 8. Machine 4 can be introduced. Gas injection pipe 9
, An electromagnetic on-off valve 10 and a check valve 11 are interposed. For example, when a large capacity is required during the heating operation, the on-off valve 10 is opened and gas injection is performed on the compressor 4. Thereby, the refrigeration cycle apparatus 1 is set to a high-output operation in which the capacity of the compressor 4 is improved.

【００１２】開閉弁１０は、図外のコントローラにより
空調負荷に対応した制御信号により開閉制御される。例
えば、空調負荷が小さいときには開閉弁１０が閉じら
れ、逆に、空調負荷が大きいとき、例えば暖房運転時に
おいて大きな能力が要求されるときには、開閉弁１０が
開かれる。空調負荷又は運転条件を決定するパラメータ
としては、周波数、圧縮比、室内外温度、室内外風量、
冷房運転要求、暖房運転要求などを含む。逆止弁１１
は、インジェクションガスの流れ方向とは逆方向の流れ
を禁止するものであり、例えば圧縮機４の作動停止直後
に圧縮機４側の圧力が気液分離器８側の圧力よりも高く
なったときに、冷媒ガスが圧縮機４から開閉弁１０へ逆
流することを規制する。逆止弁１１は、ガスインジェク
ション管９に独立して設置してもよいが、圧縮機４の中
に内蔵する形で設置するのが好ましい。逆止弁１１を圧
縮機４に内蔵したときには、圧縮機４から逆止弁１１ま
でのデッドボリュームを小さくすることができ、加えて
圧力脈動ロスを低減することができるため、効率を向上
させることができる。The on-off valve 10 is opened and closed by a controller (not shown) according to a control signal corresponding to the air conditioning load. For example, when the air conditioning load is small, the on-off valve 10 is closed. Conversely, when the air conditioning load is large, for example, when a large capacity is required during the heating operation, the on-off valve 10 is opened. Parameters that determine the air conditioning load or operating conditions include frequency, compression ratio, indoor and outdoor temperature, indoor and outdoor air flow,
It includes a cooling operation request, a heating operation request, and the like. Check valve 11
Prohibits the flow of the injection gas in a direction opposite to the flow direction. For example, when the pressure of the compressor 4 becomes higher than the pressure of the gas-liquid separator 8 immediately after the operation of the compressor 4 is stopped. Further, the flow of the refrigerant gas from the compressor 4 to the on-off valve 10 is restricted. The check valve 11 may be installed independently of the gas injection pipe 9, but is preferably installed so as to be built in the compressor 4. When the check valve 11 is built in the compressor 4, the dead volume from the compressor 4 to the check valve 11 can be reduced, and the pressure pulsation loss can be reduced, so that the efficiency can be improved. Can be.

【００１３】冷凍サイクル装置１は、ガスインジェクシ
ョン管９と圧縮機４の吸入口４ａ側の低圧ガスの配管６
とに接続されたバイパス管１５を有し、このバイパス管
１５には電磁式開閉弁からなるバイパス弁１６が介装さ
れている。すなわち、バイパス管１５はその一端が逆止
弁１１と開閉弁１０との間のガスインジェクション管９
に接続され、バイパス管１５の他端が圧縮機４の吸込口
４ａの配管６に接続されている。バイパス弁１６は、上
述したインジェクションガス用の開閉弁１０が開状態の
ときに閉じられ、インジェクション用開閉弁１０が閉状
態のときに開かれる。The refrigeration cycle apparatus 1 includes a gas injection pipe 9 and a low pressure gas pipe 6 on the suction port 4 a side of the compressor 4.
, And a bypass valve 16 formed of an electromagnetic on-off valve is interposed in the bypass pipe 15. That is, one end of the bypass pipe 15 has a gas injection pipe 9 between the check valve 11 and the on-off valve 10.
The other end of the bypass pipe 15 is connected to the pipe 6 of the suction port 4 a of the compressor 4. The bypass valve 16 is closed when the above-described injection gas on-off valve 10 is in an open state, and is opened when the injection on-off valve 10 is in a closed state.

【００１４】通常運転のときには、ガスインジェクショ
ン用開閉弁１０が閉状態とされると共にバイパス弁１６
が開状態とされる。これにより、低負荷運転になるほど
大きくなる傾向になる圧縮機４の圧力脈動を、バイパス
管１５を通じて圧縮機４の吸込口４ａ側に誘引してこれ
を減衰させることができるため、逆止弁１１のチャタリ
ングや圧縮ロスが低減することになり、圧縮機効率を向
上させることができる。During normal operation, the gas injection on-off valve 10 is closed and the bypass valve 16 is closed.
Is opened. Thereby, the pressure pulsation of the compressor 4 which tends to increase as the load becomes lower can be induced to the suction port 4a side of the compressor 4 through the bypass pipe 15 and attenuated, so that the check valve 11 can be reduced. This reduces chattering and compression loss, and improves compressor efficiency.

【００１５】図２は、第２実施例における冷凍サイクル
装置の全体系統図である。この第２実施例の説明におい
て、上述した第１実施例と同一構成要素については、同
一符号を付してその説明を省略する。この第２実施例の
冷凍サイクル装置２０においては、第１実施例で採用し
た開閉弁１０、バイパス弁１６に代わるものとして三方
弁２１が用いられ、この三方弁２１は、バイパス管１５
とガスインジェクション管９との連結部分に配設されて
いる。この三方弁２１は、ガスインジェクション管９の
圧縮機４への連通と、バイパス管１５の連通とを選択的
に切替ている。FIG. 2 is an overall system diagram of a refrigeration cycle apparatus according to a second embodiment. In the description of the second embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the refrigeration cycle apparatus 20 of the second embodiment, a three-way valve 21 is used instead of the on-off valve 10 and the bypass valve 16 employed in the first embodiment.
And a gas injection pipe 9. The three-way valve 21 selectively switches between communication of the gas injection pipe 9 to the compressor 4 and communication of the bypass pipe 15.

【００１６】この第２実施例の冷凍サイクル装置２０に
おいては、第１実施例で採用した開閉弁１０及びバイパ
ス弁１６の２つの要素を、三方弁１７という一つの要素
に集約したことから、第１実施例と同じ機能および作用
を維持しつつ装置のコンパクト化を図ることができるだ
けでなく、制御の応答性を向上させ、更にはランニング
コストの低減をも図ることができる。In the refrigeration cycle apparatus 20 according to the second embodiment, the two elements of the on-off valve 10 and the bypass valve 16 employed in the first embodiment are integrated into one element called a three-way valve 17. Not only can the device be made compact while maintaining the same functions and functions as in the first embodiment, the responsiveness of control can be improved, and the running cost can be reduced.

【００１７】[0017]

【発明の効果】本発明は、ガスインジェクションを行う
ようにした冷凍サイクル装置の基本構造をそのまま利用
しつつ若干の構造的変更を加えることで圧縮機の圧力脈
動に基づく効率低下を抑えることができる。According to the present invention, it is possible to suppress a decrease in efficiency due to the pressure pulsation of the compressor by making a slight structural change while using the basic structure of the refrigeration cycle apparatus for performing gas injection as it is. .

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１実施例による冷凍サイクル装置の
全体系統図FIG. 1 is an overall system diagram of a refrigeration cycle device according to a first embodiment of the present invention.

【図２】本発明の第２実施例による冷凍サイクル装置の
全体系統図FIG. 2 is an overall system diagram of a refrigeration cycle device according to a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ 冷凍サイクル装置 ２ 凝縮器 ３ 蒸発器 ４ 圧縮機 ４ａ 吸込口 ４ｂ 吐出口 ４ｃ インジェクションポート ８ 気液分離器 ９ ガスインジェクション管 １０ 開閉弁 １１ 逆止弁 １５ バイパス管 １６ バイパス弁 １７ 三方弁 DESCRIPTION OF SYMBOLS 1 Refrigeration cycle apparatus 2 Condenser 3 Evaporator 4 Compressor 4a Suction port 4b Discharge port 4c Injection port 8 Gas-liquid separator 9 Gas injection pipe 10 Opening / closing valve 11 Check valve 15 Bypass pipe 16 Bypass valve 17 Three-way valve

フロントページの続き (72)発明者 渡辺 伸二 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 平野 秀夫 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 室園 宏治 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 成相 茂 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 十倉 聡 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continued on the front page (72) Inventor Shinji Watanabe 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hideo Hirano 1006 Oji Kadoma Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Invention Person Koji Murosono 1006 Kadoma, Kazuma, Kadoma, Osaka Pref., Matsushita Electric Industrial Co., Ltd. (72) Inventor Shigeru Shigeru 1006, Kadoma, Kadoma, Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. 1006 Oaza Kadoma Matsushita Electric Industrial Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 圧縮機の吐出口と吸込口とが、前記圧縮
機の吐出口から吸込口に向って順に、凝縮器、第１減圧
機構、気液分離器、第２減圧機構、蒸発器を介して接続
されると共に、前記圧縮機には、前記吸込口と別個独立
してインジェクションポートが設けられ、前記インジェ
クションポートと前記気液分離器とが、ガスインジェク
ション管を介して接続され、前記ガスインジェクション
管に、前記圧縮機側から前記気液分離器側に向って順
に、逆止弁、開閉弁が介装されている冷凍サイクル装置
において、前記開閉弁と前記逆止弁との間の前記ガスイ
ンジェクション管と前記圧縮機の吸込口又は吸入側の低
圧ガス配管とを連通させるバイパス管と、前記バイパス
管に介装され、前記開閉弁が開状態にあるときに閉じて
前記バイパス管を遮断し、前記開閉弁が閉状態にあると
きに開として前記バイパス管を開通させるバイパス弁と
を備えていることを特徴とする冷凍サイクル装置。1. A condenser, a first pressure reducing mechanism, a gas-liquid separator, a second pressure reducing mechanism, and an evaporator, wherein a discharge port and a suction port of a compressor are arranged in this order from a discharge port of the compressor to a suction port. In addition, the compressor is provided with an injection port separately and independently from the suction port, and the injection port and the gas-liquid separator are connected via a gas injection pipe, In a refrigeration cycle device in which a gas injection pipe is provided with a check valve and an on-off valve in order from the compressor side to the gas-liquid separator side, a gas between the on-off valve and the check valve is provided. A bypass pipe that communicates the gas injection pipe with a low-pressure gas pipe on the suction side or the suction side of the compressor; and a bypass pipe that is interposed in the bypass pipe and closes when the on-off valve is in an open state to close the bypass pipe. Cut off And a bypass valve for opening the bypass pipe by opening when the on-off valve is in a closed state. 【請求項２】 前記開閉弁が、前記冷凍サイクル装置の
負荷状態に応じて開閉制御されることを特徴とする請求
項１に記載の冷凍サイクル装置。2. The refrigeration cycle apparatus according to claim 1, wherein the on-off valve is controlled to open and close according to a load state of the refrigeration cycle apparatus. 【請求項３】 圧縮機の吐出口と吸込口とが、前記圧縮
機の吐出口から吸込口に向って順に、凝縮器、第１減圧
機構、気液分離器、第２減圧機構、蒸発器を介して接続
されると共に、前記圧縮機には、前記吸込口と別個独立
してインジェクションポートが設けられ、前記インジェ
クションポートと前記気液分離器とが、ガスインジェク
ション管を介して接続され、前記ガスインジェクション
管に、逆止弁が介装されている冷凍サイクル装置におい
て、前記気液分離器と前記逆止弁との間の前記ガスイン
ジェクション管と前記圧縮機の吸入口又は吸込口側の低
圧ガス配管とを連通させるバイパス管と、前記バイパス
管と前記ガス通路との接続位置に設けられ、前記ガスイ
ンジェクション管と前記バイパス管とを選択的に開閉す
る三方弁とを備えていることを特徴とする冷凍サイクル
装置。3. A condenser, a first decompression mechanism, a gas-liquid separator, a second decompression mechanism, and an evaporator, wherein the discharge port and the suction port of the compressor are arranged in this order from the discharge port of the compressor to the suction port. In addition, the compressor is provided with an injection port separately and independently from the suction port, and the injection port and the gas-liquid separator are connected via a gas injection pipe, In a refrigeration cycle device in which a check valve is interposed in a gas injection pipe, the gas injection pipe between the gas-liquid separator and the check valve and a low pressure on a suction port or a suction port side of the compressor. A bypass pipe that communicates with a gas pipe; and a three-way valve that is provided at a connection position between the bypass pipe and the gas passage and selectively opens and closes the gas injection pipe and the bypass pipe. A refrigeration cycle device. 【請求項４】 前記三方弁が、前記冷凍サイクル装置の
負荷状態に応じて切替制御されることを特徴とする請求
項３に記載の冷凍サイクル装置。4. The refrigeration cycle apparatus according to claim 3, wherein the three-way valve is switch-controlled in accordance with a load state of the refrigeration cycle apparatus. 【請求項５】 前記逆止弁が前記圧縮機に内蔵されてい
ることを特徴とする請求項１から請求項４のいずれかに
記載の冷凍サイクル装置。5. The refrigeration cycle apparatus according to claim 1, wherein the check valve is built in the compressor.
JP27398397A 1997-09-19 1997-09-19 Refrigeration cycle device Expired - Fee Related JP3592500B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27398397A JP3592500B2 (en) 1997-09-19 1997-09-19 Refrigeration cycle device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27398397A JP3592500B2 (en) 1997-09-19 1997-09-19 Refrigeration cycle device

Publications (2)

Publication Number Publication Date
JPH1194368A true JPH1194368A (en) 1999-04-09
JP3592500B2 JP3592500B2 (en) 2004-11-24

Family

ID=17535309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27398397A Expired - Fee Related JP3592500B2 (en) 1997-09-19 1997-09-19 Refrigeration cycle device

Country Status (1)

Country Link
JP (1) JP3592500B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010525292A (en) * 2007-04-24 2010-07-22 キャリア コーポレイション Refrigerant vapor compression system and method in transcritical operation
EP2286162A1 (en) * 2007-12-20 2011-02-23 Carrier Corporation Refrigerant system and method of operating the same
JP2019082316A (en) * 2017-10-31 2019-05-30 ダイキン工業株式会社 Refrigerant cycle device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010525292A (en) * 2007-04-24 2010-07-22 キャリア コーポレイション Refrigerant vapor compression system and method in transcritical operation
US8424326B2 (en) 2007-04-24 2013-04-23 Carrier Corporation Refrigerant vapor compression system and method of transcritical operation
EP2286162A1 (en) * 2007-12-20 2011-02-23 Carrier Corporation Refrigerant system and method of operating the same
EP2286162A4 (en) * 2007-12-20 2012-09-12 Carrier Corp Refrigerant system and method of operating the same
JP2019082316A (en) * 2017-10-31 2019-05-30 ダイキン工業株式会社 Refrigerant cycle device

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