JP2001091063A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2001091063A JP2001091063A JP26510099A JP26510099A JP2001091063A JP 2001091063 A JP2001091063 A JP 2001091063A JP 26510099 A JP26510099 A JP 26510099A JP 26510099 A JP26510099 A JP 26510099A JP 2001091063 A JP2001091063 A JP 2001091063A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- liquid
- receiver
- gas
- flow
- 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.)
- Withdrawn
Links
Abstract
Description
【発明の属する技術分野】本発明は、余剰冷媒量調整手
段を有する空気調和機に関する。The present invention relates to an air conditioner having a surplus refrigerant amount adjusting means.
【従来の技術】従来、余剰冷媒量調整手段を有する空気
調和機として、図２に示すように構成したものがある。
圧縮機、凝縮器、受液器、蒸発器を順に接続してなる空
気調和機において、室外熱交換器２で凝縮液化した液冷
媒を絞り機構３を介して余剰冷媒量調節手段である受液
器４に送り込むようにしている。つまり、室外熱交換器
２の出口と受液器４の間に絞り機構３を設けることによ
り、室外熱交換器２からの液媒体の流量を制御し、室外
熱交換器２の出口過冷却度を制御可能にしている。ま
た、受液器4の気液分離された下部液域４ｂに流量調節
機構５を接続するとともに、上部ガス域４ｂにバイパス
管６を接続し、流量調節機構５で流量制御される液媒体
とバイパス管６から取り出したガス媒体を合流させて二
相冷媒として室内熱交換器７に送り込むようにしてい
る。このような構成によると、圧縮機１より高温高圧ガ
スを吐出し、この高温高圧ガスが室外熱交換器２に送り
込まれると、ここでの熱交換により凝縮液化され、さら
に絞り機構３での液媒体の流量制御により室外熱交換器
２の出口過冷却度は、所定の過冷却度に制御される。そ
して、過冷却された液冷媒は、さらに絞り機構３で減圧
膨張され、低圧二相冷媒となって受液器４に流入され
る。そして、受液器４内の気液分離された媒体のうち、
上部ガス域４ａのガス冷媒は、バイパス管６から取り出
され、また、下部液域４ｂの液冷媒は、流量調節機構５
で流量制御され、これらガス冷媒および液冷媒は、バイ
パス管６で合流され室内熱交換器７に流入される。室内
熱交換器７に流入された低圧二相冷媒は、熱交換により
蒸発気化され、ガス冷媒として圧縮機１に吸入され所定
の冷凍サイクルが形成される。ところが、このように構
成した冷媒回路では、室外熱交換器２を凝縮器として利
用する冷房の場合には成立するが、室外熱交換器２を蒸
発器として利用する暖房の場合には成立しないという問
題があった。2. Description of the Related Art Conventionally, there is an air conditioner having a surplus refrigerant amount adjusting means configured as shown in FIG.
In an air conditioner in which a compressor, a condenser, a liquid receiver, and an evaporator are connected in order, a liquid refrigerant condensed and liquefied in the outdoor heat exchanger 2 is supplied through a throttle mechanism 3 as a surplus refrigerant amount adjusting means. To the container 4. That is, by providing the throttle mechanism 3 between the outlet of the outdoor heat exchanger 2 and the liquid receiver 4, the flow rate of the liquid medium from the outdoor heat exchanger 2 is controlled, and the degree of supercooling at the outlet of the outdoor heat exchanger 2 Is controllable. Further, a flow rate adjusting mechanism 5 is connected to the gas-liquid separated lower liquid area 4b of the liquid receiver 4, and a bypass pipe 6 is connected to the upper gas area 4b. The gas medium taken out from the bypass pipe 6 is merged and sent to the indoor heat exchanger 7 as a two-phase refrigerant. According to such a configuration, a high-temperature and high-pressure gas is discharged from the compressor 1, and when the high-temperature and high-pressure gas is sent to the outdoor heat exchanger 2, the gas is condensed and liquefied by the heat exchange here, By controlling the flow rate of the medium, the degree of subcooling at the outlet of the outdoor heat exchanger 2 is controlled to a predetermined degree of subcooling. Then, the subcooled liquid refrigerant is further decompressed and expanded by the throttle mechanism 3 and flows into the liquid receiver 4 as a low-pressure two-phase refrigerant. Then, of the gas-liquid separated medium in the liquid receiver 4,
The gas refrigerant in the upper gas region 4a is taken out of the bypass pipe 6, and the liquid refrigerant in the lower liquid region 4b is
The gas refrigerant and the liquid refrigerant are joined by the bypass pipe 6 and flow into the indoor heat exchanger 7. The low-pressure two-phase refrigerant that has flowed into the indoor heat exchanger 7 is evaporated and vaporized by heat exchange, and is sucked into the compressor 1 as a gas refrigerant to form a predetermined refrigeration cycle. However, in the refrigerant circuit configured as described above, the condition is established in the case of cooling using the outdoor heat exchanger 2 as a condenser, but not in the case of heating using the outdoor heat exchanger 2 as an evaporator. There was a problem.
【発明が解決しようとする課題】本発明は、上記事情に
鑑みてなされたもので、冷房・暖房ともに冷凍サイクル
の能力およびＣＯＰ（成績係数）を高めることができる
空気調和機を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner capable of improving the refrigeration cycle capacity and COP (coefficient of performance) for both cooling and heating. Aim.
【課題を解決するための手段】本発明の第１の発明は、
冷媒が圧縮機、凝縮器、受液器、蒸発器を順に循環する
空気調和機において、前記凝縮器と前記受液器の間に接
続され、前記凝縮器からの前記冷媒の流量を制御すると
ともに、二相冷媒として前記受液器に流入させるよう設
けられた絞り機構と、前記受液器の液域に接続され、こ
の液域からの液媒体の流量を制御するよう設けられた流
量調節機構と、受液器内のガス域に接続されたバイパス
管及び、同バイパス管に前記ガス域のガス媒体を取り出
すよう設けられた逆止弁とが具備され、前記流量調節機
構からの液媒体と前記バイパス管からのガス媒体を合流
して前記蒸発器に流入させる空気調和機にある。このよ
うに構成されているので、冷房のときは室外熱交換器の
出口過冷却度が制御でき、暖房のときは室内熱交換器の
出口過冷却度が制御できる。第２の発明は、圧縮機と、
室外熱交換器と、室内熱交換器と、受液器と、前記室外
熱交換器と前記受液器の液相部とを連絡する管路と、同
管路途中に設けられた絞り機構と、前記室内熱交換器と
前記受液器の液相部を連絡する管路と、同管路途中に設
けられた流量調整機構と、前記圧縮機の吐出ガス冷媒の
向け先を、冷房時と暖房時とで、前記室外熱交換器と前
記室内熱交換器とにそれぞれ切換える四方弁と、前記受
液器の気相部から前記室外熱交換器と前記絞り機構との
間の管路に、該方向への流れのみ許容する逆止弁を介し
て連絡するバイパス管と、前記受液器の気相部から前記
室内熱交換器と前記流量調整弁との間の管に、該方向へ
の流れのみを許容する逆止弁を介して連絡するバイパス
管とを備えてなる空気調和機にある。このように、前記
受液器の気相部から前記室外熱交換器と前記絞り機構と
の間の管路に、該方向への流れのみ許容する逆止弁を介
して連絡するバイパス管と、前記受液器の気相部から前
記室内熱交換器と前記流量調整弁との間の管に、該方向
への流れのみを許容する逆止弁を介して連絡するバイパ
ス管とを備えているので、より好ましく、冷房のときは
室外熱交換器の出口過冷却度が制御でき、暖房のときは
室内熱交換器の出口過冷却度が制御できる。Means for Solving the Problems A first invention of the present invention is:
In an air conditioner in which a refrigerant circulates through a compressor, a condenser, a receiver, and an evaporator in order, the refrigerant is connected between the condenser and the receiver to control a flow rate of the refrigerant from the condenser. A throttle mechanism provided to flow into the receiver as a two-phase refrigerant, and a flow control mechanism connected to the liquid area of the receiver and provided to control the flow rate of the liquid medium from the liquid area. And a bypass pipe connected to a gas area in the receiver, and a check valve provided to take out the gas medium in the gas area in the bypass pipe, and a liquid medium from the flow rate adjusting mechanism. An air conditioner in which a gas medium from the bypass pipe merges and flows into the evaporator. With this configuration, the degree of supercooling at the outlet of the outdoor heat exchanger can be controlled during cooling, and the degree of supercooling at the outlet of the indoor heat exchanger can be controlled during heating. A second invention is a compressor,
An outdoor heat exchanger, an indoor heat exchanger, a receiver, a pipe connecting the outdoor heat exchanger and a liquid phase part of the receiver, and a throttle mechanism provided in the middle of the pipe. A pipe connecting the indoor heat exchanger and the liquid phase portion of the liquid receiver, a flow regulating mechanism provided in the middle of the pipe, and a destination of the discharge gas refrigerant of the compressor, during cooling. At the time of heating, a four-way valve that switches to the outdoor heat exchanger and the indoor heat exchanger, respectively, and from the gas phase portion of the receiver to the pipeline between the outdoor heat exchanger and the throttle mechanism, A bypass pipe communicating via a check valve allowing only the flow in the direction, and a pipe from the gas phase part of the receiver to the pipe between the indoor heat exchanger and the flow regulating valve, An air conditioner comprising a bypass pipe communicating via a check valve that allows only flow. In this way, a bypass pipe communicating from the gas phase portion of the liquid receiver to the pipeline between the outdoor heat exchanger and the throttle mechanism through a check valve that allows only the flow in the direction, A bypass pipe communicating from a gas phase portion of the liquid receiver to a pipe between the indoor heat exchanger and the flow control valve via a check valve that allows only a flow in the direction is provided. Therefore, it is more preferable to control the degree of supercooling at the outlet of the outdoor heat exchanger during cooling, and to control the degree of subcooling at the outlet of the indoor heat exchanger during heating.
【発明の実施の形態】圧縮機１、室外熱交換器２、受液
器４、室内熱交換器７を順に接続してなる空気調和機に
おいて、圧縮機１と室外熱交換器２の間に四方弁８を介
し、また室外熱交換器２と受液器４との間に接続され、
室外熱交換器２からの液媒体の流量を制御するととも
に、二相冷媒として受液器４に流入させる絞り機構３
と、前記受液器４の液域に接続され、この液域からの液
媒体の流量を制御する流量調整機構５と、受液器４のガ
ス域に接続され、逆止弁９ａを介してこのガス域のガス
媒体を取り出すバイパス管６ａとを具備し、流量調節機
構５からの液媒体と逆止弁９ａを介したバイパス管６ａ
からのガス媒体を合流して室内熱交換器７に流入させる
ようにしている。冷房時は、圧縮機１から吐出された高
温高圧のガス冷媒は、四方弁８を介して室外熱交換器２
で凝縮液化させて、絞り機構３を介して余剰冷媒量調節
手段である受液器４に送り込むようにしている。つま
り、室外熱交換器２の出口と受液器４の間に絞り機構
３、および逆止弁９ｂを介したバイパス管６ｂを設ける
ことにより、室外熱交換器２からの液媒体は絞り機構３
のみを通過し流量を制御して、室外熱交換器２の出口過
冷却度を制御可能にしている。室内熱交換器７に流入さ
れた低圧二相冷媒は、熱交換により蒸発気化され、ガス
冷媒として四方弁８を介して、圧縮機１に吸入され所定
の冷凍サイクルが形成される。この場合、室内熱交換器
７に流入される液冷媒は、流量調節機構５により室内熱
交換器７の出口過熱度が所定値になるように流量制御さ
れ、圧縮機１に送り出される。これにより、冷媒回路内
に封入された余剰冷媒は、受液器４に溜め込まれた状態
になり、これによりシステムの過熱度・過冷却度を制御
することが可能になる。また、暖房時は圧縮機１から吐
出された高温高圧のガス冷媒は、四方弁８を介して室内
熱交換器７で凝縮液化されて、流量調節機構５を介して
余剰冷媒量調節手段である受液器４に送り込むようにし
ている。つまり、室内熱交換器７の出口と受液器４の間
に設けられた流量調節機構５によって、室内熱交換器７
からの液媒体は流量が制御されて、室内熱交換器７の出
口過冷却度が調節されるようになっている。その後、液
冷媒は絞り機構３により流量調整されバイパス管からの
ガス冷媒と合流して室外熱交換器２に流入し、熱交換に
より蒸発気化して、ガス冷媒として四方弁８を介して、
圧縮機１に吸入され所定の冷凍サイクルが形成される。BEST MODE FOR CARRYING OUT THE INVENTION In an air conditioner in which a compressor 1, an outdoor heat exchanger 2, a liquid receiver 4, and an indoor heat exchanger 7 are connected in this order, between the compressor 1 and the outdoor heat exchanger 2. Connected via the four-way valve 8 and between the outdoor heat exchanger 2 and the liquid receiver 4;
A throttle mechanism 3 for controlling the flow rate of the liquid medium from the outdoor heat exchanger 2 and allowing the liquid medium to flow into the receiver 4 as a two-phase refrigerant.
And a flow rate adjusting mechanism 5 connected to the liquid area of the liquid receiver 4 and controlling the flow rate of the liquid medium from the liquid area; and a flow control mechanism 5 connected to the gas area of the liquid receiver 4 via the check valve 9a. A bypass pipe 6a for taking out the gas medium in the gas area, and a bypass pipe 6a via a check valve 9a and the liquid medium from the flow rate adjusting mechanism 5.
From the air conditioner are merged and flow into the indoor heat exchanger 7. During cooling, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows through the four-way valve 8 to the outdoor heat exchanger 2.
To condense and liquefy, and send it to a liquid receiver 4 as a surplus refrigerant amount adjusting means via a throttle mechanism 3. That is, by providing the throttle mechanism 3 and the bypass pipe 6b via the check valve 9b between the outlet of the outdoor heat exchanger 2 and the liquid receiver 4, the liquid medium from the outdoor heat exchanger 2 can be used.
By controlling the flow rate only through the outside heat exchanger 2, the degree of supercooling at the outlet of the outdoor heat exchanger 2 can be controlled. The low-pressure two-phase refrigerant flowing into the indoor heat exchanger 7 is evaporated and vaporized by heat exchange, and is sucked into the compressor 1 as a gas refrigerant via the four-way valve 8 to form a predetermined refrigeration cycle. In this case, the flow rate of the liquid refrigerant flowing into the indoor heat exchanger 7 is controlled by the flow rate adjusting mechanism 5 so that the degree of superheat at the outlet of the indoor heat exchanger 7 becomes a predetermined value, and is sent out to the compressor 1. As a result, the surplus refrigerant sealed in the refrigerant circuit is stored in the liquid receiver 4, thereby making it possible to control the degree of superheating / supercooling of the system. Further, at the time of heating, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed and liquefied in the indoor heat exchanger 7 through the four-way valve 8, and serves as a surplus refrigerant amount adjusting means through the flow rate adjusting mechanism 5. The liquid is sent to the receiver 4. That is, the flow rate adjusting mechanism 5 provided between the outlet of the indoor heat exchanger 7 and the liquid receiver 4 allows the indoor heat exchanger 7
The flow rate of the liquid medium from is controlled so that the degree of subcooling at the outlet of the indoor heat exchanger 7 is adjusted. Thereafter, the flow rate of the liquid refrigerant is adjusted by the throttle mechanism 3, and the liquid refrigerant joins the gas refrigerant from the bypass pipe, flows into the outdoor heat exchanger 2, evaporates and evaporates by heat exchange, and passes through the four-way valve 8 as a gas refrigerant.
The refrigerant is sucked into the compressor 1 to form a predetermined refrigeration cycle.
【発明の効果】本発明によれば、室外熱交換器２に流入
される液冷媒は、絞り機構３により室外熱交換器２の出
口過熱度が所定値になるように流量制御され、圧縮機１
に送り出される。これにより、冷媒回路内に封入された
余剰冷媒は、受液器４に溜め込まれた状態になり、これ
によりシステムの過熱度・過冷却度を制御することが可
能になる。従って、冷房・暖房ともに凝縮器となる、室
外熱交換器、室内熱交換器の出口過冷却度を所定値に制
御した上で液媒体の流量を制御することが可能となり、
また、蒸発器となる室内熱交換器、室外熱交換器の出口
過熱度も所定値に制御できるので、システムの過熱度・
過冷却度をそれぞれ最適に制御できるようになり、冷凍
サイクルの能力およびＣＯＰ（成績係数）を飛躍的に高
めることができる。According to the present invention, the flow rate of the liquid refrigerant flowing into the outdoor heat exchanger 2 is controlled by the throttle mechanism 3 so that the degree of superheat at the outlet of the outdoor heat exchanger 2 becomes a predetermined value. 1
Will be sent to As a result, the surplus refrigerant sealed in the refrigerant circuit is stored in the liquid receiver 4, thereby making it possible to control the degree of superheating / supercooling of the system. Therefore, it becomes possible to control the flow rate of the liquid medium after controlling the degree of supercooling at the outlet of the outdoor heat exchanger and the indoor heat exchanger to a predetermined value.
In addition, the degree of superheat at the outlet of the indoor heat exchanger as an evaporator and the outlet of the outdoor heat exchanger can be controlled to a predetermined value.
The degree of supercooling can be optimally controlled, and the capacity of the refrigeration cycle and the COP (coefficient of performance) can be dramatically increased.
【図１】本発明の余剰冷媒量調整手段を有する空気調和
機の冷媒回路図FIG. 1 is a refrigerant circuit diagram of an air conditioner having a surplus refrigerant amount adjusting means of the present invention.
【図２】従来の余剰冷媒量調整手段を有する空気調和機
の冷媒回路図FIG. 2 is a refrigerant circuit diagram of a conventional air conditioner having excess refrigerant amount adjusting means.
１…圧縮機 ２…室外熱交換器 ３…絞り機構
４…受液器 ４ａ…上部ガス域 ４ｂ…下部液域 ５…流量調整機構 ６，６ａ，６ｂ…バイパス管
７…室内熱交換器 ８…四方弁 ９ａ，９ｂ…逆止弁DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Outdoor heat exchanger 3 ... Throttle mechanism
4 Liquid receiver 4a Upper gas area 4b Lower liquid area 5 Flow control mechanism 6, 6a, 6b Bypass pipe
7 Indoor heat exchanger 8 Four-way valve 9a, 9b Check valve
Claims (2)
を順に循環する空気調和機において、前記凝縮器と前記
受液器の間に接続され、前記凝縮器からの前記冷媒の流
量を制御するとともに、二相冷媒として前記受液器に流
入させるよう設けられた絞り機構と、前記受液器の液域
に接続され、この液域からの液媒体の流量を制御するよ
う設けられた流量調節機構と、受液器内のガス域に接続
されたバイパス管及び、同バイパス管に前記ガス域のガ
ス媒体を取り出すよう設けられた逆止弁とが具備され、
前記流量調節機構からの液媒体と前記バイパス管からの
ガス媒体を合流して前記蒸発器に流入させることを特徴
とした空気調和機。1. An air conditioner in which a refrigerant circulates through a compressor, a condenser, a liquid receiver, and an evaporator in order, is connected between the condenser and the liquid receiver, and receives the refrigerant from the condenser. A throttle mechanism provided to control the flow rate and flow into the receiver as a two-phase refrigerant, and connected to a liquid area of the receiver and provided to control the flow rate of the liquid medium from this liquid area. A flow control mechanism, a bypass pipe connected to the gas area in the receiver, and a check valve provided to take out the gas medium in the gas area in the bypass pipe,
An air conditioner wherein the liquid medium from the flow rate adjusting mechanism and the gas medium from the bypass pipe are combined and flow into the evaporator.
器と、受液器と、前記室外熱交換器と前記受液器の液相
部とを連絡する管路と、同管路途中に設けられた絞り機
構と、前記室内熱交換器と前記受液器の液相部を連絡す
る管路と、同管路途中に設けられた流量調整機構と、前
記圧縮機の吐出ガス冷媒の向け先を、冷房時と暖房時と
で、前記室外熱交換器と前記室内熱交換器とにそれぞれ
切換える四方弁と、前記受液器の気相部から前記室外熱
交換器と前記絞り機構との間の管路に、該方向への流れ
のみ許容する逆止弁を介して連絡するバイパス管と、前
記受液器の気相部から前記室内熱交換器と前記流量調整
弁との間の管に、該方向への流れのみを許容する逆止弁
を介して連絡するバイパス管とを備えてなることを特徴
とする空気調和機。2. A compressor, an outdoor heat exchanger, an indoor heat exchanger, a liquid receiver, a pipe connecting the outdoor heat exchanger and a liquid phase portion of the liquid receiver, and the same pipe. A throttle mechanism provided in the middle of the path, a pipe connecting the indoor heat exchanger and the liquid phase portion of the liquid receiver, a flow regulating mechanism provided in the middle of the pipe, and a discharge gas of the compressor. A four-way valve for switching the destination of the refrigerant between the outdoor heat exchanger and the indoor heat exchanger during cooling and heating, respectively, and the outdoor heat exchanger and the throttle from the gas phase portion of the liquid receiver. A bypass pipe that communicates with a pipe between the mechanism and a check valve that allows only the flow in the direction, and a flow path between the indoor heat exchanger and the flow control valve from the gas phase portion of the receiver. An air conditioner comprising: a bypass pipe connected to a pipe between the two via a check valve that allows only a flow in the direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26510099A JP2001091063A (en) | 1999-09-20 | 1999-09-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26510099A JP2001091063A (en) | 1999-09-20 | 1999-09-20 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001091063A true JP2001091063A (en) | 2001-04-06 |
Family
ID=17412616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26510099A Withdrawn JP2001091063A (en) | 1999-09-20 | 1999-09-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001091063A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255730A (en) * | 2006-03-20 | 2007-10-04 | Mitsubishi Electric Corp | Air conditioner |
| CN103615764A (en) * | 2013-12-18 | 2014-03-05 | 青海德能新能源有限公司 | Energy-saving air conditioner |
| CN103629842A (en) * | 2013-12-18 | 2014-03-12 | 北京德能恒信科技有限公司 | Phase change heat pump system |
| WO2015056704A1 (en) * | 2013-10-17 | 2015-04-23 | 東芝キヤリア株式会社 | Refrigeration cycle device |
| CN105612394A (en) * | 2013-08-09 | 2016-05-25 | 特灵空调系统(中国)有限公司 | Transitional refrigerant migration control in refrigeration systems |
-
1999
- 1999-09-20 JP JP26510099A patent/JP2001091063A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255730A (en) * | 2006-03-20 | 2007-10-04 | Mitsubishi Electric Corp | Air conditioner |
| JP4679401B2 (en) * | 2006-03-20 | 2011-04-27 | 三菱電機株式会社 | Air conditioner |
| CN105612394A (en) * | 2013-08-09 | 2016-05-25 | 特灵空调系统(中国)有限公司 | Transitional refrigerant migration control in refrigeration systems |
| WO2015018054A3 (en) * | 2013-08-09 | 2017-01-19 | Trane Air Conditioning Systems (China) Co., Ltd. | Transitional refrigerant migration control in refrigeration systems |
| WO2015056704A1 (en) * | 2013-10-17 | 2015-04-23 | 東芝キヤリア株式会社 | Refrigeration cycle device |
| JPWO2015056704A1 (en) * | 2013-10-17 | 2017-03-09 | 東芝キヤリア株式会社 | Refrigeration cycle equipment |
| CN103615764A (en) * | 2013-12-18 | 2014-03-05 | 青海德能新能源有限公司 | Energy-saving air conditioner |
| CN103629842A (en) * | 2013-12-18 | 2014-03-12 | 北京德能恒信科技有限公司 | Phase change heat pump system |
| CN103629842B (en) * | 2013-12-18 | 2016-03-02 | 北京德能恒信科技有限公司 | A kind of phase change heat pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20061205 |