JPH03260543A - Air conditioner and its control method - Google Patents
Air conditioner and its control methodInfo
- Publication number
- JPH03260543A JPH03260543A JP2060186A JP6018690A JPH03260543A JP H03260543 A JPH03260543 A JP H03260543A JP 2060186 A JP2060186 A JP 2060186A JP 6018690 A JP6018690 A JP 6018690A JP H03260543 A JPH03260543 A JP H03260543A
- Authority
- JP
- Japan
- Prior art keywords
- heat source
- source side
- refrigerant circuit
- heat
- user
- 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
Landscapes
- Other Air-Conditioning Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明（友 熱源側冷媒回路と利用側冷媒回路に分離し
た空気調和機の高効率化に関するものであも
従来の技術
従来 熱源側冷媒回路と利用側冷媒回路に分離した空気
調和機の冷媒回路として第２図に示すような冷媒回路が
提案されていも
第２図において、 １は圧縮！Ｌ２は熱源側四方弁、
３は熱源側熱交換器 ４は絞り装ｆ１５は第１補助熱交
換器であり、これらを順次接続して熱源側冷媒回路が構
成されていも まｔ−６は冷媒ポンプ、７は利用側四方
弁、 ８は室内側熱交換器９は第２補助熱交換器であり
、これらを順次接続して利用側冷媒回路が構成されてい
も な耘 第１補助熱交換器５と第２補助熱交換器９は
互いに熱交換するよう構成されていも
このような樋底において、冷房運転を行う場合に（よ
熱源側四方弁２および利用側四方弁７を実線で示す方向
に接続し 圧縮機１および冷媒ポンプ６を運転すも 熱
源側冷媒回路では 圧縮機１から吐出された高温高圧の
冷媒ガス（戴 熱源側四方弁２を介して、熱源側熱交換
器３に導かれ ここで放熱して凝縮液化した抵 絞り装
置４で蒸発圧力まで減圧膨張して、第１補助熱交換器５
で蒸発気化して、再び熱源側四方弁２を介して圧縮機１
に吸入されモー基 利用側冷媒回路で番ヨ 冷媒ポ
ンプ６より吐出された液冷媒１よ 利用側四方弁７を介
して、利用側熱交換器８に導かれも ここで室内空気と
熱交換して室内を冷房すると共に自らは蒸発気化した抵
第２補助熱交換器９に入り、ここで熱源側冷媒回路の
第１補助熱交換器５を流れる冷媒と熱交換することによ
り凝縮液化して、再び利用側四方弁７を介して冷媒ポン
プ６に吸引されも
暖房運転を行う場合に＆よ 熱源側四方弁２および利用
側四方弁７を破線で示す方向に接続し 圧縮機１および
冷媒ポンプ６を運転すも 熱源側冷媒回路で（よ 圧縮
機１から吐出された高温高圧の冷媒ガス＆よ 熱源側四
方弁２を介して、第１補助熱交換器５に導かれ ここで
放熱して凝縮液化した抵 絞り装置４で蒸発圧力まで減
圧膨張して、熱源側熱交換器３で蒸発気化して、再び熱
源側四方弁２を介して圧縮機１に吸入され４ −Ｘ
利用側冷媒回路で（よ 冷媒ポンプ６より吐出された液
冷媒ζよ 利用側四方弁７を介して、第２補助熱交換器
９に導かれも ここで熱源側冷媒回路の第１補助熱交換
器５を流れる冷媒と熱交換することにより蒸発気化した
後、利用側熱交換器８に入り、ここで室内空気と熱交換
して室内を暖房すると共に 自らは凝縮液化し 再び利
用側四方弁７を介して冷媒ポンプ６に吸引されも
発明が解決しようとする課題
しかしながら上記のような空気調和機の冷媒回路構成で
（よ 補助熱交換器で熱交換する冷媒の温度を、冷房運
転時には利用側熱交換器で必要な温度より低く、また暖
房運転時には利用側熱交換器で必要な温度より高くして
おく必要があり、そのために 熱源側冷媒回路は高温高
圧側と低温低圧側の差の大き八 すなわち圧縮比の大き
い運転が強いられ そのため冷凍サイクルの効率低下並
びに能力の低下を引き起こし 同一の冷暖房能力を必要
とする場合、熱源側冷媒回路と利用側冷媒回路に分離さ
れていない一般の空気調和機よりも大型の圧縮機が必要
となるなどの欠点を有していた課題を解決するための手
段
本発明の空気調和機（上 熱源側圧縮機、 熱源側四方
弁、熱源側熱交換器 熱源側絞り装置 および第１補助
熱交換器等を接続した熱源側冷媒回路と、利用側圧縮機
利用側四方弁、室内側熱交換滑 利用側絞り装置等お
よび第２補助熱交換器を接続した利用側冷媒回路を有し
前記熱源側冷媒回路の第１補助熱交換器と前記利用側
冷媒回路の第２補助熱交換器を熱交換関係に構成したも
のであ瓜
また 本発明の空気調和機の制御方法は 利用側圧縮機
の能力制御を、室内空気の状態量に基づいて行ｔ、Ｘ、
熱源側圧縮機の能力制御を、熱源側圧縮機の吸入冷媒の
過熱度に基づいて行うものであも
作用
請求項１記載の空気調和機ＧＬ 熱源側冷媒回路を用
いて外気を熱源としたヒートポンプサイクルを運転し
中間温度レベルの熱源を作りだし これを熱源として、
利用側冷媒回路を用いたヒートポンプサイクルを運転す
ることにより、冷房あるいは暖房を行うものであも こ
れにより、利用側熱交換器で必要とする温度を越えた低
温あるいは高温を発生させることがなく、成績係数の向
上および熱源側圧縮機の小型化が図れるものであもまた
請求項２記載の空気調和機の制御方法（上利用側圧縮
機と熱源側圧縮機の適正な制御により、室内空気環境の
快適性向上と、冷媒回路の信頼性向上を図れるものであ
も
実施例
以下、本発明の一実施例を添付図面に基づいて説明すも
第１図は本発明の一実施例における空気調和機の構成図
であり、 １０は熱源側圧縮ａ １１は熱源側四方弁
、 １２は熱源側熱交換器 １３は熱源側絞り装ｆｉｔ
１４は第１補助熱交換器であり、これらを順次接続
して熱源側冷媒回路が構成されていへ ま？＝１５は利
用側圧縮ａ １６は利用側四方弁、 １７は室内側熱
交換器 １８は利用側絞り装置１ １９は第２補助熱交
換器であり、これらを順次接続して利用側冷媒回路が構
成されてい瓜な抵 第１補助熱交換器１４と第２補助熱
交換器１９は互いに熱交換するよう構成されていもまｔ
−２０は室内空気の状態量である室温を検出して利用側
圧縮機１５の能力制御を行う利用側制御器であり、２１
は熱源側圧縮機１０の吸入冷媒の過熱度を検出して能力
制御を行う熱源側制御器であも
このような構成において、冷房運転を行う場合に（友
熱源側四方弁１１および利用側四方弁１６を実線で示す
方向に接続し 熱源側圧縮機１０および利用側圧縮機１
５を運転すａ 熱源側冷媒回路で（よ 熱源側圧縮機１
０から吐出された高温高圧の冷媒ガス（友 熱源側四方
弁１１を介して、熱源側熱交換器１２に導かれ ここで
放熱して凝縮液化した比 熱源側絞り装置１３で中間圧
力まで減圧膨張して、第１補助熱交換器１４で蒸発気化
して、再び熱源側四方弁１１を介して熱源側圧縮機ｌＯ
に吸入され＆ −Ｘ 利用側冷媒回路では利用側圧
縮機１５より吐出された中間圧力の冷媒（よ 利用側四
方弁１６を介して、第２補助熱交換器１９に入り、ここ
で熱源側冷媒回路の第１補助熱交換器１４を流れる冷媒
と熱交換することにより凝縮液化した黴 利用側絞り装
置１８で蒸発圧力まで減圧されて、利用側熱交換器１７
に導かれる。ここで室内空気と熱交換して室内を冷房す
ると共に 自らは蒸発気化した後、再び利用側四方弁１
６を介して利用側圧縮機１５に吸引されも暖房運転を行
う場合には 熱源側四方弁１１および利用側四方弁１６
を破線で示す方向に接続し熱源側圧縮機１０および利用
側圧縮Ｗ１１５を運転すも 熱源側冷媒回路で（よ 圧
縮機１０から吐出された中間圧力の冷媒ガスζよ 熱源
側四方弁１１を介して、第１補助熱交換器１４に導かれ
ここで放熱して凝縮液化した抵 熱源側絞り装置１３
で蒸発圧力まで減圧膨張して、熱源側熱交換器１２で蒸
発気化して、再び熱源側四方弁１１を介して熱源側圧縮
機１０に吸入され４ −Ｘ 利用側冷媒回路で（よ
利用側圧縮機１５より吐出された高温高圧の冷媒は 利
用側四方弁１６を介して、利用側熱交換器８に入り、こ
こで室内空気と熱交換して室内を暖房すると共に 自ら
は凝縮液化し利用側絞り装置１８で中間圧力まで減圧さ
れた後、第２補助熱交換器１９に導かれも ここで熱源
側冷媒回路の第１補助熱交換器１４を流れる冷媒と熱交
換することにより蒸発気化し 再び利用側四方弁１６を
介して利用側圧縮機１５に吸引されもこのような運転時
には 利用側圧縮機１５は利用側制御器２０により、室
内温度が最短時間で設定値になるよう能力制御され こ
れにより熱源側冷媒回路の負荷も変化する力文 熱源側
圧縮機１０は熱源側制御器２１により、吸入冷媒の過熱
度を適正に採板 液冷媒を吸入することがないよう能力
制御される。[Detailed description of the invention] Industrial field of application The present invention relates to improving the efficiency of an air conditioner separated into a heat source side refrigerant circuit and a user side refrigerant circuit. Although a refrigerant circuit as shown in Fig. 2 has been proposed as a refrigerant circuit for an air conditioner separated into a side refrigerant circuit, in Fig. 2, 1 is compression!L2 is a four-way valve on the heat source side,
3 is a heat source side heat exchanger 4 is a throttle device f15 is a first auxiliary heat exchanger, and even if these are connected sequentially to form a heat source side refrigerant circuit, t-6 is a refrigerant pump, and 7 is a four-way user side The indoor heat exchanger 9 is a second auxiliary heat exchanger, and the user-side refrigerant circuit is configured by connecting these in sequence.The first auxiliary heat exchanger 5 and the second auxiliary heat exchanger Although the containers 9 are configured to exchange heat with each other, when performing cooling operation at the bottom of such a gutter,
The heat source side four-way valve 2 and the user side four-way valve 7 are connected in the direction shown by the solid line, and the compressor 1 and refrigerant pump 6 are operated. It is led to the heat source side heat exchanger 3 via the side four-way valve 2, where it radiates heat and condenses and liquefies.
It is evaporated and vaporized again to the compressor 1 via the four-way valve 2 on the heat source side.
The liquid refrigerant 1 discharged from the refrigerant pump 6 is introduced into the user-side heat exchanger 8 via the user-side four-way valve 7, where it exchanges heat with indoor air. At the same time, the evaporated and vaporized refrigerant enters the second auxiliary heat exchanger 9, where it condenses and liquefies by exchanging heat with the refrigerant flowing through the first auxiliary heat exchanger 5 of the heat source side refrigerant circuit. When performing heating operation even if the refrigerant is sucked into the refrigerant pump 6 via the user-side four-way valve 7, the heat source-side four-way valve 2 and the user-side four-way valve 7 are connected in the direction shown by the broken line. In the refrigerant circuit on the heat source side, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 is guided to the first auxiliary heat exchanger 5 via the four-way valve 2 on the heat source side, where it radiates heat and condenses. The liquefied liquid is depressurized and expanded to the evaporation pressure in the expansion device 4, evaporated and vaporized in the heat source side heat exchanger 3, and is again sucked into the compressor 1 via the heat source side four-way valve 2.
The liquid refrigerant ζ discharged from the refrigerant pump 6 is introduced into the second auxiliary heat exchanger 9 via the user-side four-way valve 7 in the user-side refrigerant circuit. After exchanging heat with the refrigerant flowing through the container 5, it evaporates and vaporizes, enters the user-side heat exchanger 8, where it exchanges heat with indoor air to heat the room, and condenses and liquefies itself, returning to the user-side four-way valve 7. However, in the refrigerant circuit configuration of an air conditioner as described above, the temperature of the refrigerant to be heat exchanged in the auxiliary heat exchanger can be adjusted to the user side during cooling operation. The temperature must be lower than that required by the heat exchanger, and higher than the temperature required by the heat exchanger on the user side during heating operation, so the refrigerant circuit on the heat source side must have a large difference between the high-temperature, high-pressure side and the low-temperature, low-pressure side. 8. In other words, operation with a high compression ratio is forced, which causes a decrease in the efficiency and capacity of the refrigeration cycle.When the same heating and cooling capacity is required, general air conditioners that are not separated into a heat source-side refrigerant circuit and a user-side refrigerant circuit The air conditioner of the present invention (heat source side compressor, heat source side four-way valve, heat source side heat exchanger, heat source side heat exchanger, air conditioner of the present invention) A heat source side refrigerant circuit that connects a side throttle device, first auxiliary heat exchanger, etc., a user side compressor, a user side four-way valve, an indoor heat exchanger, a user side throttle device, etc., and a second auxiliary heat exchanger. The air conditioner of the present invention has a side refrigerant circuit, and the first auxiliary heat exchanger of the heat source side refrigerant circuit and the second auxiliary heat exchanger of the user side refrigerant circuit are configured in a heat exchange relationship. The control method is to control the capacity of the compressor on the user side based on the state quantity of indoor air, t,
The air conditioner GL according to claim 1, wherein the capacity of the heat source side compressor is controlled based on the degree of superheating of the refrigerant sucked into the heat source side compressor. drive a cycle
Create a heat source with an intermediate temperature level and use this as a heat source,
Cooling or heating is performed by operating a heat pump cycle using a user-side refrigerant circuit. This prevents the generation of low or high temperatures that exceed the temperature required by the user-side heat exchanger. The control method for an air conditioner according to claim 2 (by properly controlling the upper utilization side compressor and the heat source side compressor, it is possible to improve the coefficient of performance and downsize the heat source side compressor, thereby improving the indoor air environment. An embodiment of the present invention will be described below with reference to the accompanying drawings. 10 is a heat source side compression a, 11 is a heat source side four-way valve, 12 is a heat source side heat exchanger, and 13 is a heat source side restrictor fit.
14 is a first auxiliary heat exchanger, and these are connected in sequence to form a heat source side refrigerant circuit. = 15 is the compression a on the user side, 16 is the four-way valve on the user side, 17 is the indoor heat exchanger, 18 is the user side expansion device 1, and 19 is the second auxiliary heat exchanger, and these are connected in sequence to form the user side refrigerant circuit. The first auxiliary heat exchanger 14 and the second auxiliary heat exchanger 19 may be configured to exchange heat with each other.
-20 is a user-side controller that detects room temperature, which is a state quantity of indoor air, and controls the capacity of the user-side compressor 15;
is a heat source side controller that detects the degree of superheat of the suction refrigerant of the heat source side compressor 10 and controls the capacity.
The heat source side four-way valve 11 and the usage side four-way valve 16 are connected in the direction shown by the solid line, and the heat source side compressor 10 and the usage side compressor 1 are connected.
5 in the heat source side refrigerant circuit (in the heat source side compressor 1
The high-temperature, high-pressure refrigerant gas discharged from 0 is guided to the heat source side heat exchanger 12 via the heat source side four-way valve 11, where it radiates heat and condenses and liquefies. It is evaporated in the first auxiliary heat exchanger 14, and then transferred to the heat source side compressor lO via the heat source side four-way valve 11 again.
- The mold is condensed and liquefied by exchanging heat with the refrigerant flowing through the first auxiliary heat exchanger 14 of the circuit. The mold is depressurized to the evaporation pressure by the user-side expansion device 18 and transferred to the user-side heat exchanger 17.
guided by. Here, it exchanges heat with the indoor air to cool the room, and after evaporating itself, it returns to the four-way valve 1 on the user side.
6 to the user side compressor 15 and perform heating operation, the heat source side four-way valve 11 and the user side four-way valve 16
The compressor 10 on the heat source side and the compressor W115 on the user side are operated by connecting the compressor 10 on the heat source side in the direction shown by the broken line. The heat source side diaphragm device 13 is guided to the first auxiliary heat exchanger 14, where it radiates heat and condenses into a liquid.
The refrigerant is depressurized and expanded to the evaporation pressure at
The high-temperature, high-pressure refrigerant discharged from the user-side compressor 15 enters the user-side heat exchanger 8 via the user-side four-way valve 16, where it exchanges heat with indoor air to heat the room, and condenses and liquefies itself. After the pressure is reduced to an intermediate pressure by the user-side expansion device 18, the refrigerant is led to the second auxiliary heat exchanger 19, where it evaporates by exchanging heat with the refrigerant flowing through the first auxiliary heat exchanger 14 of the heat source side refrigerant circuit. Even if it is vaporized and sucked into the user-side compressor 15 again via the user-side four-way valve 16, during such operation, the user-side compressor 15 is controlled by the user-side controller 20 so that the indoor temperature reaches the set value in the shortest possible time. As a result, the load on the heat source side refrigerant circuit changes. Ru.
以上のような実施例によれば 冷房運転隊 暖房運転時
共に 熱源側冷媒回路を用いて外気を熱源としたヒート
ポンプサイクルを運転し 中間温度レベルの熱源を作り
だし これを熱源として、利用側冷媒回路を用いたヒー
トポンプサイクルを運転することにより、冷房あるいは
暖房を行うことができ、これにより、熱源偲 利用側共
に非常に圧縮比の低いヒートポンプサイクルとすること
ができ、成績係数の向上および熱源側圧縮機の小型化が
図れるものであも
また 利用側圧縮機と熱源側圧縮機の適正な制御を行う
ことができ、室内空気環境の快適性向上と、冷媒回路の
信頼性向上を図れるものであもな耘 本実施例では 使
用する冷媒については触れなかった力支 熱源側冷媒回
路と、利用側冷媒回路に それぞれの利用条件に応じた
異なる冷媒を封入することにより、さらに高効率化が図
れることは明かであも
発明の効果
以上の説明より明らかなように 本発明の空気調和気は
熱源側冷媒回路の第１補助熱交換器と前記利用側冷媒回
路の第２補助熱交換器を熱交換関係に構成したものであ
るか転 冷房運転隊 暖房運転時共に 熱源側冷媒回路
を用いて外気を熱源としたヒートポンプサイクルを運転
し 中間温度レベルの熱源を作りだし これを熱源とし
て、利用側冷媒回路を用いたヒートポンプサイクルを運
転することにより、冷房あるいは暖房を行うことができ
、これにより、熱源偲 利用側共に非常に圧縮比の低い
ヒートポンプサイクルとすることがで東 成績係数の向
上および熱源側圧縮機の小型化が図れるものであも
また 本発明の空気調和機の制御方法（よ 利用側圧縮
機の能力制御を、室内空気の状態量に基づいて行〜＼
熱源側圧縮機の能力制御を、熱源側圧縮機の吸入冷媒の
過熱度に基づいて行うものであるか板 利用側圧縮機と
熱源側圧縮機の適正な制御を行うことがで獣 室内空気
環境の快適性向上と、冷媒回路の信頼性向上を図れるな
ど、実用上番犬な効果を発揮するものであムAccording to the embodiment described above, the cooling operation team operates a heat pump cycle using outside air as a heat source using the heat source side refrigerant circuit during heating operation, creates a heat source at an intermediate temperature level, and uses this as a heat source to run the user side refrigerant circuit. By operating the heat pump cycle, cooling or heating can be performed.This allows the heat pump cycle to have a very low compression ratio on both the heat source side and the user side, improving the coefficient of performance and improving the heat source side compressor. It is possible to reduce the size of the compressor, and it is also possible to properly control the compressor on the user side and the compressor on the heat source side, thereby improving the comfort of the indoor air environment and the reliability of the refrigerant circuit. Although the refrigerant used in this example was not mentioned, it is possible to further improve efficiency by filling the heat source side refrigerant circuit and the user side refrigerant circuit with different refrigerants depending on the usage conditions. Effects of the Invention As is clear from the above explanation, the air conditioner of the present invention has a heat exchange relationship between the first auxiliary heat exchanger of the heat source side refrigerant circuit and the second auxiliary heat exchanger of the user side refrigerant circuit. During heating operation, the cooling operation team operates a heat pump cycle that uses outside air as a heat source using the heat source side refrigerant circuit, creates a heat source at an intermediate temperature level, and uses this as a heat source to use the user side refrigerant circuit. Cooling or heating can be performed by operating a heat pump cycle with a high compression ratio, which improves the coefficient of performance and improves the heat source side compressor. The method for controlling an air conditioner according to the present invention (i.e., controlling the capacity of the compressor on the user side based on the state quantity of indoor air)
The capacity of the heat source compressor is controlled based on the degree of superheating of the refrigerant sucked into the heat source compressor. Proper control of the user compressor and the heat source compressor can improve the indoor air environment. It is a practical watchdog effect that can improve the comfort of the vehicle and the reliability of the refrigerant circuit.
Claims (2)
熱源側絞り装置、および第１補助熱交換器等を接続した
熱源側冷媒回路と、利用側圧縮機、利用側四方弁、室内
側熱交換器、利用側絞り装置等および第２補助熱交換器
を接続した利用側冷媒回路を有し、前記熱源側冷媒回路
の第１補助熱交換器と前記利用側冷媒回路の第２補助熱
交換器を熱交換関係に構成したことを特徴とする空気調
和機。(1) Heat source side compressor, heat source side four-way valve, heat source side heat exchanger,
A heat source side refrigerant circuit to which a heat source side throttle device, a first auxiliary heat exchanger, etc. are connected, a user side compressor, a user side four-way valve, an indoor heat exchanger, a user side throttle device, etc., and a second auxiliary heat exchanger. The air conditioner has a user side refrigerant circuit connected to the heat source side refrigerant circuit, and a first auxiliary heat exchanger of the heat source side refrigerant circuit and a second auxiliary heat exchanger of the user side refrigerant circuit are configured in a heat exchange relationship. Machine.
基づいて行い、熱源側圧縮機の能力制御を、熱源側圧縮
機の吸入冷媒の過熱度に基づいて行うことを特徴とする
請求項１記載の空気調和機の制御方法。(2) The capacity of the user side compressor is controlled based on the state quantity of indoor air, and the capacity of the heat source side compressor is controlled based on the degree of superheating of the refrigerant sucked into the heat source side compressor. The method for controlling an air conditioner according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2060186A JPH03260543A (en) | 1990-03-12 | 1990-03-12 | Air conditioner and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2060186A JPH03260543A (en) | 1990-03-12 | 1990-03-12 | Air conditioner and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03260543A true JPH03260543A (en) | 1991-11-20 |
Family
ID=13134882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2060186A Pending JPH03260543A (en) | 1990-03-12 | 1990-03-12 | Air conditioner and its control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03260543A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101139341B1 (en) * | 2009-06-02 | 2012-04-26 | 현우산기주식회사 | Heat pump apparatus |
| JP2013213591A (en) * | 2012-03-31 | 2013-10-17 | Toyo Eng Works Ltd | Method for controlling binary refrigeration apparatus |
| CN105757762A (en) * | 2015-03-13 | 2016-07-13 | 熵零股份有限公司 | Heat supply system |
| CN105823112A (en) * | 2015-03-25 | 2016-08-03 | 熵零股份有限公司 | Heat supply system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS632053B2 (en) * | 1979-12-12 | 1988-01-16 | Toyota Motor Co Ltd |
-
1990
- 1990-03-12 JP JP2060186A patent/JPH03260543A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS632053B2 (en) * | 1979-12-12 | 1988-01-16 | Toyota Motor Co Ltd |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101139341B1 (en) * | 2009-06-02 | 2012-04-26 | 현우산기주식회사 | Heat pump apparatus |
| JP2013213591A (en) * | 2012-03-31 | 2013-10-17 | Toyo Eng Works Ltd | Method for controlling binary refrigeration apparatus |
| CN105757762A (en) * | 2015-03-13 | 2016-07-13 | 熵零股份有限公司 | Heat supply system |
| CN105823112A (en) * | 2015-03-25 | 2016-08-03 | 熵零股份有限公司 | Heat supply system |
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