JPH04313647A - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JPH04313647A JPH04313647A JP3076605A JP7660591A JPH04313647A JP H04313647 A JPH04313647 A JP H04313647A JP 3076605 A JP3076605 A JP 3076605A JP 7660591 A JP7660591 A JP 7660591A JP H04313647 A JPH04313647 A JP H04313647A
- Authority
- JP
- Japan
- Prior art keywords
- compression
- refrigeration cycle
- way valve
- gas
- liquid
- 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
- 230000006835 compression Effects 0.000 claims abstract description 97
- 238000007906 compression Methods 0.000 claims abstract description 97
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 description 14
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/04—Refrigerant level
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、２段圧縮式冷凍サイク
ルを用いたヒートポンプ式空気調和機に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump air conditioner using a two-stage compression refrigeration cycle.
【０００２】0002
【従来の技術】一般に、低温冷蔵庫やバッチ式凍結設備
など、蒸発圧力が極めて低く圧縮比の高い運転状態を必
要とする冷凍装置においては、２段圧縮式冷凍サイクル
が使用されており、単段の冷凍サイクルに比べてエネル
ギー効率の高い冷凍サイクルを構成することができる。[Prior Art] Generally, a two-stage compression refrigeration cycle is used in refrigeration equipment such as low-temperature refrigerators and batch-type freezing equipment that requires operating conditions with extremely low evaporation pressure and high compression ratio. It is possible to construct a refrigeration cycle with higher energy efficiency than that of other refrigeration cycles.
【０００３】以下、図５を参照しながら、上記従来の２
段圧縮式冷凍サイクルについて説明する。同図において
、１は第１圧縮部１ａと第２圧縮部１ｂとを有する圧縮
装置、２は凝縮器、３ａおよび３ｂは第１および第２膨
脹弁、４は気液分離器、５は蒸発器である。また、前記
気液分離器４のガス出口と、第１圧縮部１ａと第２圧縮
部１ｂの連絡管路との間にバイパス管６（インジェクシ
ョン回路）が設けられている。Hereinafter, with reference to FIG. 5, the above-mentioned conventional two
A staged compression refrigeration cycle will be explained. In the figure, 1 is a compression device having a first compression section 1a and a second compression section 1b, 2 is a condenser, 3a and 3b are first and second expansion valves, 4 is a gas-liquid separator, and 5 is an evaporator. It is a vessel. Further, a bypass pipe 6 (injection circuit) is provided between the gas outlet of the gas-liquid separator 4 and the communication pipe between the first compression section 1a and the second compression section 1b.
【０００４】この２段圧縮式冷凍サイクルにおいて、圧
縮装置１から吐出された冷媒は凝縮器２、第１膨脹弁３
ａ、気液分離器４、第２膨脹弁３ｂ、蒸発器５を流れて
、圧縮装置１に吸入される。このとき、気液分離器４の
飽和ガスはバイパス管６を通って第２圧縮部１ｂの吸入
側に送られている。In this two-stage compression refrigeration cycle, the refrigerant discharged from the compression device 1 is passed through the condenser 2 and the first expansion valve 3.
a, flows through the gas-liquid separator 4, the second expansion valve 3b, and the evaporator 5, and is sucked into the compression device 1. At this time, the saturated gas in the gas-liquid separator 4 is sent to the suction side of the second compression section 1b through the bypass pipe 6.
【０００５】すなわち、気液分離器４により分離された
液成分は蒸発器５へ、ガス成分は第２圧縮部１ｂへイン
ジェクションすることにより蒸発器５でのエンタルピ差
の増大、凝縮器２の循環量の増大により冷凍サイクルの
効率向上が図られている。That is, the liquid component separated by the gas-liquid separator 4 is injected into the evaporator 5, and the gas component is injected into the second compression section 1b, thereby increasing the enthalpy difference in the evaporator 5 and circulating the condenser 2. The efficiency of the refrigeration cycle is improved by increasing the amount.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の２段圧縮式冷凍サイクルをヒートポンプ式空気調和
機に適用する場合には、立ち上がり時などの過渡状態に
おいて気液分離器４が液で満たされたり、あるいは急激
な圧力変化によるフォーミングなどによりバイパス管６
を通って第２圧縮部１ｂに液冷媒が流入するため、液圧
縮を起こし圧縮装置１が破損するという課題を有してい
た。However, when the conventional two-stage compression refrigeration cycle described above is applied to a heat pump type air conditioner, the gas-liquid separator 4 is filled with liquid in a transient state such as during start-up. bypass pipe 6 due to forming due to sudden pressure changes, etc.
Since the liquid refrigerant flows into the second compression section 1b through the refrigerant, there is a problem that liquid compression occurs and the compression device 1 is damaged.
【０００７】本発明はこのような課題を解決するもので
、液圧縮による圧縮装置の破損を防止できるようにする
ことを目的とするものである。[0007] The present invention is intended to solve these problems, and it is an object of the present invention to prevent damage to a compression device due to liquid compression.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明は、第１圧縮部と第２圧縮部からなる圧縮装置
、凝縮器、第１減圧器、気液分離器、第２減圧器、蒸発
器を環状に接続して２段圧縮式冷凍サイクルを構成し、
前記気液分離器と、前記第１圧縮部と第２圧縮部の連絡
管路とを接続したバイパス管に２方弁を設け、この２方
弁を開閉して２段圧縮式冷凍サイクルの中間冷却の有、
無を切り換えるように構成したものである。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a compression device including a first compression section and a second compression section, a condenser, a first pressure reducer, a gas-liquid separator, and a second pressure reduction device. A two-stage compression refrigeration cycle is constructed by connecting the evaporator and evaporator in a ring.
A two-way valve is provided in the bypass pipe connecting the gas-liquid separator and the communication pipe between the first compression section and the second compression section, and the two-way valve is opened and closed to cool the middle of the two-stage compression refrigeration cycle. With cooling,
It is configured to switch between zero and zero.
【０００９】[0009]
【作用】この構成により、気液分離器と、第１圧縮部と
第２圧縮部の接続管路とを接続したバイパス管に２方弁
を設け、前記２方弁を開閉して２段圧縮冷凍サイクル中
間冷却の有、無を切り換える構成により、第２圧縮部へ
の液冷媒の流入を防ぐことができる。[Operation] With this configuration, a two-way valve is provided in the bypass pipe that connects the gas-liquid separator and the connecting pipe line between the first compression section and the second compression section, and the two-way valve is opened and closed to perform two-stage compression. By switching between the presence and absence of refrigeration cycle intercooling, it is possible to prevent liquid refrigerant from flowing into the second compression section.
【００１０】0010
【実施例】以下、本発明の実施例について、図１〜図４
に基づき説明する。なお、本実施例を説明するにあたり
、図５に示す従来例と同一部材は同一符号で示している
。[Example] The following is an example of the present invention in FIGS. 1 to 4.
The explanation will be based on. In describing this embodiment, the same members as those in the conventional example shown in FIG. 5 are indicated by the same reference numerals.
【００１１】まず、図１に示す第１実施例について説明
する。同図において、第１圧縮部１ａと第２圧縮部１ｂ
を有する圧縮装置１、凝縮器２、第１膨脹弁３ａ、気液
分離器４、第２膨張弁３ｂ、蒸発器５を環状に接続して
２段圧縮式冷凍サイクルを構成し、前記気液分離器４の
冷凍ガス出口と前記第１圧縮部１ａと第２圧縮部１ｂの
連絡管路とを接続するバイパス管６（インジェクション
回路）に２方弁７が設けられている。First, a first embodiment shown in FIG. 1 will be explained. In the figure, a first compression section 1a and a second compression section 1b are shown.
A two-stage compression refrigeration cycle is constructed by connecting a compression device 1, a condenser 2, a first expansion valve 3a, a gas-liquid separator 4, a second expansion valve 3b, and an evaporator 5 in an annular manner. A two-way valve 7 is provided in a bypass pipe 6 (injection circuit) that connects the frozen gas outlet of the separator 4 and the communication pipe of the first compression section 1a and the second compression section 1b.
【００１２】次に、上記構成の動作について説明する。
前記第１圧縮部１ａで圧縮された冷媒はさらに第２圧縮
部１ｂで圧縮され、凝縮器２で凝縮液化される。液化さ
れた冷媒は第１膨張弁３ａで減圧膨張され、気液分離器
４に流入する。気液分離器４で冷媒の液成分とガス成分
に分離され、液成分は第２膨張弁３ｂでさらに減圧され
、蒸発器５で蒸発し、圧縮装置１に吸入される。一方、
気液分離器４で分離されたガス成分はバイパス管６に入
り２方弁７を経て、第２圧縮部１ｂの吸入側に合流する
。Next, the operation of the above configuration will be explained. The refrigerant compressed in the first compression section 1a is further compressed in the second compression section 1b, and is condensed and liquefied in the condenser 2. The liquefied refrigerant is depressurized and expanded by the first expansion valve 3a and flows into the gas-liquid separator 4. The refrigerant is separated into a liquid component and a gas component by the gas-liquid separator 4, and the liquid component is further reduced in pressure by the second expansion valve 3b, evaporated by the evaporator 5, and sucked into the compression device 1. on the other hand,
The gas components separated by the gas-liquid separator 4 enter the bypass pipe 6, pass through the two-way valve 7, and join the suction side of the second compression section 1b.
【００１３】ここで、冷凍サイクル停止時に気液分離器
４に液冷媒が溜り込んでいる状態で運転すると、液冷媒
がバイパス管６に流入し第２圧縮部１ｂで液圧縮が起こ
り、第２圧縮部１ｂが破損する。[0013] If the refrigeration cycle is operated with liquid refrigerant accumulated in the gas-liquid separator 4 when the refrigeration cycle is stopped, the liquid refrigerant flows into the bypass pipe 6 and liquid compression occurs in the second compression section 1b. The compression part 1b is damaged.
【００１４】そこで、液冷媒がバイパス管６に流入する
状態を検出して２方弁７を開閉し、２段圧縮式冷凍サイ
クルの中間冷却の有、無を切り換える構成にすることに
より、液圧縮を防止することができる。Therefore, by detecting the state in which the liquid refrigerant flows into the bypass pipe 6 and opening and closing the two-way valve 7 to switch between the presence and absence of intermediate cooling in the two-stage compression refrigeration cycle, liquid compression is achieved. can be prevented.
【００１５】次に、図２に基づき２段圧縮式冷凍サイク
ルの制御について説明する。図において、８は圧縮装置
１の入力などから運転、停止を検出する圧縮装置運転状
態検出手段、９は２方弁７の制御部（タイマー）である
。他の構成は図１に示す実施例と同じである。Next, control of the two-stage compression type refrigeration cycle will be explained based on FIG. In the figure, reference numeral 8 denotes a compressor operating state detection means for detecting whether the compressor is running or stopped based on the input of the compressor 1, and 9 is a control unit (timer) for the two-way valve 7. The other configurations are the same as the embodiment shown in FIG.
【００１６】この図に示す構成の動作について説明する
。まず、２方弁７を開の状態にして２段圧縮式冷凍サイ
クルの中間冷却有の運転をしているとする。ここで、室
温が設定温度に近づき圧縮装置１が停止する一旦２方弁
７を閉じる。室温と設定温度の差が出て再び圧縮装置１
が起動すると、気液分離器４の圧力が急激に変化しフォ
ーミングを起こすなどでバイパス管６に液冷媒が流入す
るが、一定時間２方弁７が閉じられているため、液冷媒
が第２圧縮部１ｂに流入することはない。フォーミング
が始まった一定時間経過後、２方弁７を開とすることに
より、２段圧縮式冷凍サイクルの中間冷却有となる。The operation of the configuration shown in this figure will be explained. First, it is assumed that the two-way compression refrigeration cycle is operated with intermediate cooling with the two-way valve 7 open. Here, the two-way valve 7 is closed once the room temperature approaches the set temperature and the compression device 1 is stopped. When there is a difference between the room temperature and the set temperature, the compressor 1 is turned on again.
When the gas-liquid separator 4 starts, the pressure in the gas-liquid separator 4 changes rapidly, causing forming, etc., and liquid refrigerant flows into the bypass pipe 6. However, since the two-way valve 7 is closed for a certain period of time, the liquid refrigerant flows into the second It does not flow into the compression section 1b. After a certain period of time has elapsed since the start of forming, the two-way valve 7 is opened to enable intermediate cooling in the two-stage compression refrigeration cycle.
【００１７】上記の構成により、圧縮装置１を起動する
ときには２方弁７をある一定時間閉とする２段圧縮式冷
凍サイクルの中間冷却の有無を切り換える制御手段を設
けることにより液圧縮を防ぐことができる。With the above configuration, liquid compression can be prevented by providing a control means for switching between the presence and absence of intermediate cooling in the two-stage compression refrigeration cycle, which closes the two-way valve 7 for a certain period of time when the compression device 1 is started. Can be done.
【００１８】次に、図３に基づき他の実施例について説
明すると、１０は気液分離器４の液面レベルを検出する
液面レベル検出部、１１は前記液面レベル検出部１０か
らの信号により２方弁７の開閉を制御する制御部である
。Next, another embodiment will be explained based on FIG. 3. Reference numeral 10 indicates a liquid level detecting section for detecting the liquid level of the gas-liquid separator 4, and 11 indicates a signal from the liquid level detecting section 10. This is a control unit that controls opening and closing of the two-way valve 7.
【００１９】上記構成において、動作について説明する
と、まず２方弁７を開の状態にして２段圧縮式冷凍サイ
クル中間冷却有の運転をしているとする。ここで、室温
が設定温度に近づき圧縮装置１が停止し気液分離器４に
液冷媒が溜り込んだとする。室温と設定温度に差が現わ
れ再び圧縮装置１が起動すると、液面レベル検出部１０
により液面レベルが検出され、一定値以上であれば即座
に２方弁７を閉とする。運転後、液面レベルが一定値未
満になると２方弁７を開とする。To explain the operation of the above configuration, it is assumed that the two-way compression refrigeration cycle is operated with intermediate cooling with the two-way valve 7 open. Here, it is assumed that the room temperature approaches the set temperature, the compression device 1 is stopped, and liquid refrigerant accumulates in the gas-liquid separator 4. When a difference appears between the room temperature and the set temperature and the compression device 1 starts up again, the liquid level detection unit 10
The liquid level is detected, and if it is above a certain value, the two-way valve 7 is immediately closed. After operation, when the liquid level becomes less than a certain value, the two-way valve 7 is opened.
【００２０】上記の構成により、気液分離器４の液面レ
ベルを検出し、２方弁７を開閉して２段圧縮式冷凍サイ
クルの中間冷却の有、無を切り換える制御手段を設ける
ことにより液圧縮を防ぐことができる。With the above configuration, by providing a control means that detects the liquid level of the gas-liquid separator 4 and opens and closes the two-way valve 7 to switch between the presence and absence of intermediate cooling in the two-stage compression refrigeration cycle. Liquid compression can be prevented.
【００２１】さらに、図４に基づき他の実施例について
説明すると、１２は圧縮装置１の第２圧縮部１ｂの過熱
度を検出する検出部、１３は前記検出部１２からの信号
により２方弁７の開閉を制御する制御部である。Further, another embodiment will be described based on FIG. 4. Reference numeral 12 detects the degree of superheat of the second compression section 1b of the compression device 1, and 13 a two-way valve according to the signal from the detection section 12. This is a control unit that controls the opening and closing of 7.
【００２２】上記構成において、動作について説明する
と、停止状態から運転を開始すると、検出部１２により
圧縮装置１の第２圧縮部１ｂの吸入における過熱度が検
出される。ここで、過熱度が一定値より小さい場合は２
方弁７を閉とする。過熱度がとれてきて一定値以上にな
ったときには２方弁７を開とする。In the above structure, the operation will be explained. When the operation is started from a stopped state, the detection section 12 detects the degree of superheat in the suction of the second compression section 1b of the compression device 1. Here, if the degree of superheat is less than a certain value, 2
Direction valve 7 is closed. When the degree of superheat has subsided and exceeded a certain value, the two-way valve 7 is opened.
【００２３】上記の構成により、圧縮装置１の第２圧縮
部１ｂの吸入における過熱度を検出し、２方弁７を開閉
して２段圧縮式冷凍サイクルの中間冷却の有、無を切り
換える制御手段を設けることにより液圧縮を防ぐことが
できる。With the above configuration, the degree of superheat in the suction of the second compression section 1b of the compression device 1 is detected, and the two-way valve 7 is opened and closed to switch between the presence and absence of intermediate cooling in the two-stage compression refrigeration cycle. Liquid compression can be prevented by providing means.
【００２４】なお上記の各実施例において、圧縮装置１
として１シェル２シリンダを使用しているが、２個独立
に設けたものでもよい。In each of the above embodiments, the compression device 1
Although one shell and two cylinders are used, two cylinders may be provided independently.
【００２５】[0025]
【発明の効果】上記説明から明らかなように本発明によ
れば、圧縮装置の第１圧縮部と第２圧縮部の接続間と気
液分離器を接続するバイパス管（インジェクション回路
）に２方弁を設け、２段圧縮式冷凍サイクルの中間冷却
有と中間冷却型を切り換えるように構成してあることに
より、第２圧縮部への液冷媒の流入を防ぎ、液圧縮によ
る圧縮装置の破損を防止することができる。Effects of the Invention As is clear from the above description, according to the present invention, two-way injection is provided between the connection between the first compression section and the second compression section of the compression device and the bypass pipe (injection circuit) connecting the gas-liquid separator. By providing a valve and configuring the two-stage compression refrigeration cycle to switch between the intermediate cooling type and the intermediate cooling type, it prevents liquid refrigerant from flowing into the second compression section and prevents damage to the compression device due to liquid compression. It can be prevented.
【図１】本発明の一実施例におけるヒートポンプ式空気
調和機の冷凍サイクル図である。FIG. 1 is a refrigeration cycle diagram of a heat pump air conditioner according to an embodiment of the present invention.
【図２】同冷凍サイクル中に制御手段を設けた状態を示
す冷凍サイクル図である。FIG. 2 is a refrigeration cycle diagram showing a state in which a control means is provided in the refrigeration cycle.
【図３】同冷凍サイクル中に他の制御手段を設けた状態
を示す冷凍サイクル図である。FIG. 3 is a refrigeration cycle diagram showing a state in which another control means is provided in the refrigeration cycle.
【図４】同冷凍サイクル中にさらに他の制御手段を設け
た状態を示す冷凍サイクル図である。FIG. 4 is a refrigeration cycle diagram showing a state in which another control means is provided in the refrigeration cycle.
【図５】従来例を示す冷凍サイクル図である。FIG. 5 is a refrigeration cycle diagram showing a conventional example.
１ 圧縮装置
１ａ 第１圧縮部
１ｂ 第２圧縮部
２ 凝縮器
３ａ 第１膨張弁
３ｂ 第２膨張弁
４ 気液分離器
５ 蒸発器
６ バイパス管
７ ２方弁
８ 圧縮装置運転状態検出手段９
制御部
１０ 液面レベル検出部
１１ 制御部
１２ 検出部
１３ 制御部1 Compression device 1a First compression section 1b Second compression section 2 Condenser 3a First expansion valve 3b Second expansion valve 4 Gas-liquid separator 5 Evaporator 6 Bypass pipe 7 Two-way valve 8 Compression device operating state detection means 9
Control section 10 Liquid level detection section 11 Control section 12 Detection section 13 Control section
Claims (1)
装置、凝縮器、第１減圧器、気液分離器、第２減圧器、
蒸発器を環状に接続して２段圧縮式冷凍サイクルを構成
し、前記気液分離器と、前記第１圧縮部と第２圧縮部の
接続管路とを接続したバイパス管に２方弁を設け、この
２方弁を開閉して２段圧縮式冷凍サイクルの中間冷却有
と中間冷却無を切り換えるように構成したヒートポンプ
式空気調和機。1. A compression device comprising a first compression section and a second compression section, a condenser, a first pressure reducer, a gas-liquid separator, a second pressure reducer,
A two-stage compression refrigeration cycle is configured by connecting the evaporators in a ring, and a two-way valve is provided in a bypass pipe connecting the gas-liquid separator and a connecting pipe between the first compression section and the second compression section. A heat pump type air conditioner configured to switch between intermediate cooling and non-intermediate cooling of a two-stage compression refrigeration cycle by opening and closing this two-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076605A JPH04313647A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076605A JPH04313647A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04313647A true JPH04313647A (en) | 1992-11-05 |
Family
ID=13609967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3076605A Pending JPH04313647A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04313647A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008060041A3 (en) * | 2006-11-13 | 2008-08-14 | Lg Electronics Inc | Controlling method of air conditioner |
| EP2075519A3 (en) * | 2007-12-26 | 2009-08-12 | LG Electronics Inc. | Air Conditoning system |
| CN103307795A (en) * | 2012-03-13 | 2013-09-18 | 荏原冷热***株式会社 | Turborefrigerator and method thereof |
| CN103322715A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Single-throttling complete-inter-cooling dual-working-condition refrigerating system |
| CN103322714A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Single-throttling two-stage compression refrigerating system |
| CN103322713A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Four-cycle double-stage compression refrigeration system |
| CN104481881A (en) * | 2014-10-27 | 2015-04-01 | 珠海格力电器股份有限公司 | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit |
-
1991
- 1991-04-10 JP JP3076605A patent/JPH04313647A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008060041A3 (en) * | 2006-11-13 | 2008-08-14 | Lg Electronics Inc | Controlling method of air conditioner |
| EP2075519A3 (en) * | 2007-12-26 | 2009-08-12 | LG Electronics Inc. | Air Conditoning system |
| US8006504B2 (en) | 2007-12-26 | 2011-08-30 | Lg Electronics Inc. | Air conditioning system |
| CN103307795A (en) * | 2012-03-13 | 2013-09-18 | 荏原冷热***株式会社 | Turborefrigerator and method thereof |
| JP2013190151A (en) * | 2012-03-13 | 2013-09-26 | Ebara Refrigeration Equipment & Systems Co Ltd | Turbo refrigerator and control method thereof |
| CN103307795B (en) * | 2012-03-13 | 2016-11-16 | 荏原冷热***株式会社 | Turborefrigerator and control method thereof |
| CN103322715A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Single-throttling complete-inter-cooling dual-working-condition refrigerating system |
| CN103322714A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Single-throttling two-stage compression refrigerating system |
| CN103322713A (en) * | 2013-07-04 | 2013-09-25 | 天津商业大学 | Four-cycle double-stage compression refrigeration system |
| CN104481881A (en) * | 2014-10-27 | 2015-04-01 | 珠海格力电器股份有限公司 | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit |
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