JPH04313646A - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JPH04313646A JPH04313646A JP7660491A JP7660491A JPH04313646A JP H04313646 A JPH04313646 A JP H04313646A JP 7660491 A JP7660491 A JP 7660491A JP 7660491 A JP7660491 A JP 7660491A JP H04313646 A JPH04313646 A JP H04313646A
- Authority
- JP
- Japan
- Prior art keywords
- compression
- gas
- compression section
- liquid separator
- 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.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims abstract description 52
- 238000007906 compression Methods 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 15
- 238000010586 diagram 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
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 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
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２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
張弁、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のガス出口と連絡流路との間にガス冷媒を
第２圧縮部１ｂの吸入側に送るインジェクション回路６
をバイパス接続している。Hereinafter, referring to FIG. 2, the above-mentioned conventional 2
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, an injection circuit 6 is provided between the gas outlet of the gas-liquid separator 4 and the communication flow path to send the gas refrigerant to the suction side of the second compression section 1b.
is connected by bypass.
【０００４】以下、この２段圧縮式冷凍サイクルの動作
について説明する。前記圧縮装置１から吐出された冷媒
は凝縮器２、第１膨張弁３ａ、気液分離器４、第２膨張
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の飽和ガスはインジェクション回
路６を通って第２圧縮部１ｂの吸入側に送られている。
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。[0004] The operation of this two-stage compression type refrigeration cycle will be explained below. The refrigerant discharged from the compression device 1 flows through the condenser 2, the first expansion valve 3a, 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 injection circuit 6. 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 increasing the circulation amount in the condenser 2. This is aimed at improving the efficiency of the refrigeration cycle.
【０００５】[0005]
【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、ある状態において第１圧縮部１
ａの吐出と第２圧縮部１ｂの吸入との間の圧力が気液分
離器４の圧力より高くなると、インジェクション回路６
を流れる冷媒が逆流し、冷凍サイクルの効率が低下する
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 first compression section 1
When the pressure between the discharge of a and the suction of the second compression section 1b becomes higher than the pressure of the gas-liquid separator 4, the injection circuit 6
The problem was that the refrigerant flowing through the refrigeration cycle would flow backwards, reducing the efficiency of the refrigeration cycle.
【０００６】本発明はこのような課題を解決するもので
、２段圧縮式冷凍サイクルにおけるインジェクション回
路の逆流を防止し、サイクル効率の向上を図ることを目
的とするものである。[0006] The present invention is intended to solve these problems, and aims to prevent backflow in the injection circuit in a two-stage compression type refrigeration cycle and improve cycle efficiency.
【０００７】[0007]
【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圧縮部の接続
管路とを接続したインジェクション回路に逆止弁を設け
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 check valve is provided in an injection circuit connecting the gas-liquid separator and a connecting pipe line between the first compression section and the second compression section.
【０００８】[0008]
【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インジェクション回
路に逆止弁を設けてあるので、インジェクション回路の
冷媒の逆流を防ぐことができる。[Operation] With this configuration, a check valve is provided in the injection circuit that connects the gas-liquid separator and the connection pipe between the first compression section and the second compression section, thereby preventing backflow of refrigerant in the injection circuit. be able to.
【０００９】[0009]
【実施例】以下、本発明の一実施例について、図１に基
づき説明する。なお、本実施例を説明するにあたり、図
２に示す従来例と同一部材は同一符号で示している。[Embodiment] An embodiment of the present invention will be described below with reference to FIG. In describing this embodiment, the same members as those in the conventional example shown in FIG. 2 are indicated by the same reference numerals.
【００１０】図１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膨張弁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の冷媒ガス出口と前記第１圧縮部１ａと第２圧縮部
１ｂの連絡管路とを接続するインジェクション回路６に
逆止弁７が設けられている。In FIG. 1, a compression device 1 having a first compression section 1a and a second compression section 1b, a condenser 2, and a first expansion valve 3a are shown.
, the gas-liquid separator 4, the second expansion valve 3b, and the evaporator 5 are connected in an annular manner to constitute a two-stage compression refrigeration cycle, and the refrigerant gas outlet of the gas-liquid separator 4 and the first compression section 1a are A check valve 7 is provided in the injection circuit 6 that connects the second compression section 1b to the communication pipe line.
【００１１】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インジェクション
回路６に入り逆止弁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 injection circuit 6, pass through the check valve 7, and join the suction side of the second compression section 1b.
【００１２】ここで、ある条件において第１圧縮部１ａ
の吐出と第２圧縮部１ｂの吸入との間の圧力が気液分離
器４の圧力より高くなると、インジェクション回路６を
流れる冷媒が逆流しようとするが、逆止弁７により冷媒
の逆流を防ぐことができる。Here, under certain conditions, the first compression section 1a
When the pressure between the discharge of the compressor and the suction of the second compression section 1b becomes higher than the pressure of the gas-liquid separator 4, the refrigerant flowing through the injection circuit 6 tries to flow backward, but the check valve 7 prevents the refrigerant from flowing back. be able to.
【００１３】以上説明したように本実施例によれば、イ
ンジェクション回路６の冷媒の逆流を防ぐことにより凝
縮器２の冷媒循環量の低下による能力の低下、サイクル
効率の低下を防ぐことができる。As described above, according to this embodiment, by preventing the refrigerant from flowing backward in the injection circuit 6, it is possible to prevent a decrease in capacity and a decrease in cycle efficiency due to a decrease in the amount of refrigerant circulating in the condenser 2.
【００１４】[0014]
【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、インジェクション回路の冷媒の逆流を防ぐことに
より凝縮器の冷媒循環量の低下による能力の低下を防止
し、サイクル効率の向上を図ることができる。[Effects of the Invention] As is clear from the above description, according to the present invention, by preventing the backflow of refrigerant in the injection circuit, a decrease in capacity due to a decrease in the amount of refrigerant circulating in the condenser is prevented, and cycle efficiency is improved. be able to.
【図１】本発明の一実施例を示す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 showing an embodiment of the present invention.
【図２】従来例を示す冷凍サイクル図である。FIG. 2 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 インジェクション回路 ７ 逆止弁 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 Injection circuit 7 Check valve
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インジェクション回路に逆止弁を
設け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 evaporators in a ring, and a check valve is provided in an injection circuit connecting the gas-liquid separator and a connecting pipe between the first compression section and the second compression section. Heat pump type air conditioner installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7660491A JPH04313646A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7660491A JPH04313646A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04313646A true JPH04313646A (en) | 1992-11-05 |
Family
ID=13609938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7660491A Pending JPH04313646A (en) | 1991-04-10 | 1991-04-10 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04313646A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006207974A (en) * | 2005-01-31 | 2006-08-10 | Sanyo Electric Co Ltd | Refrigerating apparatus and refrigerator |
| CN105423620A (en) * | 2015-12-25 | 2016-03-23 | 浙江工业大学 | Efficient large temperature rise two-stage throttling intercooling heat pump water heater |
| CN105485907A (en) * | 2015-12-25 | 2016-04-13 | 浙江工业大学 | High-efficiency single-stage restriction two-stage compression heat-pump water heater with large temperature rise |
| CN105546818A (en) * | 2015-12-25 | 2016-05-04 | 浙江工业大学 | Efficient large-temperature-rise single-stage-throttling intercooling heat pump water heater |
-
1991
- 1991-04-10 JP JP7660491A patent/JPH04313646A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006207974A (en) * | 2005-01-31 | 2006-08-10 | Sanyo Electric Co Ltd | Refrigerating apparatus and refrigerator |
| CN105423620A (en) * | 2015-12-25 | 2016-03-23 | 浙江工业大学 | Efficient large temperature rise two-stage throttling intercooling heat pump water heater |
| CN105485907A (en) * | 2015-12-25 | 2016-04-13 | 浙江工业大学 | High-efficiency single-stage restriction two-stage compression heat-pump water heater with large temperature rise |
| CN105546818A (en) * | 2015-12-25 | 2016-05-04 | 浙江工业大学 | Efficient large-temperature-rise single-stage-throttling intercooling heat pump water heater |
| CN105423620B (en) * | 2015-12-25 | 2017-11-07 | 浙江工业大学 | A kind of efficient big temperature rise two-stage throttling cooling during rolling heat pump water-heating machine |
| CN105546818B (en) * | 2015-12-25 | 2018-03-16 | 浙江工业大学 | A kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine |
| CN105485907B (en) * | 2015-12-25 | 2018-06-01 | 浙江工业大学 | A kind of efficient big temperature rises single-stage throttling two stages of compression Teat pump boiler |
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