JPS61259045A - Air conditioner of inverter driven type - Google Patents
Air conditioner of inverter driven typeInfo
- Publication number
- JPS61259045A JPS61259045A JP60101006A JP10100685A JPS61259045A JP S61259045 A JPS61259045 A JP S61259045A JP 60101006 A JP60101006 A JP 60101006A JP 10100685 A JP10100685 A JP 10100685A JP S61259045 A JPS61259045 A JP S61259045A
- Authority
- JP
- Japan
- Prior art keywords
- electric compressor
- inverter
- compressors
- compressor
- motor
- 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
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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- 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
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はインバータにより駆動される電動圧縮機を用
いた空気調和機に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner using an electric compressor driven by an inverter.
第３図は例えば特開昭５９−５４７８９号公報に示され
た従来のインバータ駆動式空気調和機を示す構成図であ
る。FIG. 3 is a block diagram showing a conventional inverter-driven air conditioner disclosed in, for example, Japanese Patent Laid-Open No. 59-54789.
図中、（１）は商用単相交流電源、（２）は交流電源（
１）に接続され単相交流を直流に変換するコンバータ。In the figure, (1) is a commercial single-phase AC power supply, and (2) is an AC power supply (
1) A converter that converts single-phase alternating current to direct current.
（３）はコンバータ（２）に接続され直流を可変電圧・
可変周波数の三相交流に変換するインバータ、（４）は
インバータ（３）に接続された誘導電動機によシ駆動さ
れる電動圧縮機、（５）は電動圧縮機（４）に管路で接
続された空気調和機の室内側熱交換器、（６）は室内側
熱交換器（５）に管路で接続された減圧器、（７）は減
圧器（６１と電動圧縮機＋４１Ｉｃ管路で接続された空
気調和機の室外側熱交換器である。(3) is connected to converter (2) and converts DC to variable voltage.
(4) is an electric compressor driven by an induction motor connected to the inverter (3); (5) is connected to the electric compressor (4) through a conduit. (6) is a pressure reducer connected to the indoor heat exchanger (5) with a pipe, and (7) is a pressure reducer (61 and electric compressor + 41Ic pipe connected to the indoor heat exchanger of the air conditioner). This is the outdoor heat exchanger of the connected air conditioner.
従来のインバータ駆動式空気調和機は上記のよ５に構成
され、商用単相交流電源（！）はコンバータ（２１及び
インバータ（３）を介して三相交流電源に変換され、そ
の交流電圧及び周波数は、インバータ（３）の特性によ
って決定される特定の相関関係を有する。一方、電動圧
縮機（４）、室内側熱交換器（５）、減圧器（６）及び
室外側熱交換器（７）は冷媒サイクルを構成し、暖房運
転においては、電動圧縮機（４）から吐出された高圧冷
媒は、（５）→（６）→（７）の順に冷媒サイクル内を
流動し、低圧ガスとなって再び電動圧縮機（４）に吸入
されて高圧化される。また、冷房運転忙おいては、冷媒
の流れは上記とは逆に＋４１→（７）→（６１→（５）
→（４）となる。A conventional inverter-driven air conditioner is configured as shown in 5 above. Commercial single-phase AC power (!) is converted to three-phase AC power via the converter (21) and inverter (3), and the AC voltage and frequency are have a certain correlation determined by the characteristics of the inverter (3), while the electric compressor (4), the indoor heat exchanger (5), the pressure reducer (6) and the outdoor heat exchanger (7) ) constitutes a refrigerant cycle, and during heating operation, the high-pressure refrigerant discharged from the electric compressor (4) flows in the refrigerant cycle in the order of (5) → (6) → (7), and is mixed with low-pressure gas. The refrigerant is sucked into the electric compressor (4) again and is raised to high pressure.Also, during busy cooling operation, the flow of refrigerant is opposite to the above: +41 → (7) → (61 → (5)
→(4).
単位時間当たシの冷房又は暖房能力は、インバータ（３
）によ多負荷側周波数を制御して、１動圧網機（４）の
回転速度を変化させて調整する。現在、一般的に用いら
れているインバータ駆動式空気調和機の負荷側周波数範
囲は２０〜１５０Ｈｚ程度である。また、電動圧縮機（
４）としては、全密閉形ローリングピストン式ロータリ
圧縮機（容積形）が主流となっているが、一部会密閉形
レシプロ式圧縮機（容積形）も用いられている。The cooling or heating capacity per unit time is based on the inverter (3
), the frequency on the load side is controlled, and the rotational speed of the first dynamic pressure netting machine (4) is changed and adjusted. The load-side frequency range of currently commonly used inverter-driven air conditioners is about 20 to 150 Hz. In addition, electric compressors (
As for 4), fully hermetic rolling piston rotary compressors (displacement type) are the mainstream, but partially hermetic reciprocating compressors (displacement type) are also used.
上記のような従来のインバータ駆動式空気調和機では、
空気調和（以下空調という）開始時等の急速冷房又は急
速暖房が必要とされる場合には。In the conventional inverter-driven air conditioner like the one mentioned above,
When rapid cooling or rapid heating is required, such as when starting air conditioning (hereinafter referred to as air conditioning).
電動圧縮機の回転速度をいっそう上昇させる必要がある
。しかし、電源供給側のインバータ（３１については特
に技術上の問題がないのに対し、負荷側の電動圧縮機（
４）は低速回転時の性能維持を目的として容積形が使用
されている関係上、高速回転時 １には機械
損失の増大、摩耗の激化等を生じやすい。It is necessary to further increase the rotational speed of the electric compressor. However, while there is no particular technical problem with the inverter (31) on the power supply side, the electric compressor (31) on the load side
Since 4) is a positive displacement type for the purpose of maintaining performance during low-speed rotation, 1) tends to increase mechanical loss and intensify wear during high-speed rotation.
そのため、いっそうの高速化が信頼性の極端な低下を招
くという問題点がある。Therefore, there is a problem in that even higher speeds lead to an extreme decrease in reliability.
この発明は上記問題点を解決するためになされたもので
１通常の低回転駆動時の電動圧縮機の効率は維持したま
ま、超高速回転下での急速冷房及び急速暖房を可能にし
たインバータ！に動式空気調和機を提供することを目的
とする。This invention was made to solve the above-mentioned problems. 1. An inverter that enables rapid cooling and rapid heating under ultra-high speed rotation while maintaining the efficiency of the electric compressor during normal low rotation operation! The purpose is to provide dynamic air conditioners to customers.
この発明に係るインバータ駆動式空気調和機は。 An inverter-driven air conditioner according to the present invention.
それぞれ運転周波数域が異なる第１の電動圧縮機及び第
２の電動圧縮機を管路で並列に接続していずれか一方を
選択運転し、第１及び第２の電動圧縮機の接続点に切換
弁を設け、上記選択運転に応じて第１及び第２の電動圧
縮機の一方を室内側熱交換器及び室外側熱交換器に接続
するようにしたものである。A first electric compressor and a second electric compressor, each having a different operating frequency range, are connected in parallel via a conduit, one of them is selectively operated, and the connection point of the first and second electric compressors is switched. A valve is provided to connect one of the first and second electric compressors to the indoor heat exchanger and the outdoor heat exchanger depending on the selected operation.
この発明ににいては９通常運転時は低速回転時に効率の
高い第１の電動圧縮機が運転され、空調開始時には高速
回転時忙信頼性の高い第２の電動圧縮機が運転される。In this invention, during normal operation, the first electric compressor, which is highly efficient when rotating at low speed, is operated, and when air conditioning is started, the second electric compressor, which is highly reliable when rotating at high speed, is operated.
第１図はこの発明の一実施例全売す構成図で。 Figure 1 is a block diagram of one embodiment of this invention, which is sold in its entirety.
（１）〜（３１，（５）〜（７）は上記従来装置と同様
のものである。(1) to (31) and (5) to (7) are similar to the conventional device described above.
図中、（４Ａ） 、 （４Ｂ） は互いに管路で並列
に接続された第１及び第２の電動圧縮機で、共に全密閉
形ロータリ圧縮機が用いられ、第１の電動圧縮機（４Ａ
）は従来の電動圧縮機＋４１と同一仕様であるのに対し
、第２の電動圧縮機（４Ｂ）は潤滑油、摺動材料。In the figure, (4A) and (4B) are the first and second electric compressors connected in parallel with each other through conduits, both of which are completely hermetic rotary compressors, and the first electric compressor (4A
) has the same specifications as the conventional electric compressor +41, whereas the second electric compressor (4B) uses lubricating oil and sliding materials.
摺動部品間の隙間等が高速回転に対応して設定されてお
り、低速回転域での性能は低くなっている。The gaps between sliding parts are set to correspond to high speed rotation, and performance in low speed rotation ranges is low.
（８Ａ） ？ （８Ｂ）は第１及び第２の電動圧縮機（
４Ａ） 。(8A)? (8B) is the first and second electric compressor (
4A).
（４Ｂ）の管路（吐出管及び吸入管共用）の接続点に設
けられた切換弁で、切換弁（８Ａ）は室内側熱交換器（
５）に接続され、切換弁（８Ｂ）は室外側熱交換器（７
）に接続されている。(4B) is a switching valve installed at the connection point of the pipe line (shared with the discharge pipe and suction pipe), and the switching valve (8A) is the indoor heat exchanger (
5), and the switching valve (8B) is connected to the outdoor heat exchanger (7
)It is connected to the.
なお、第１の電動圧縮機（４Ａ）の運転周波数域は２０
〜１２０ｆｉｚで、第２の電動圧縮機（４Ｂ）の運転周
波数域は１２０〜１８０Ｈｚであるとする。The operating frequency range of the first electric compressor (4A) is 20
~120fiz, and the operating frequency range of the second electric compressor (4B) is 120 to 180Hz.
上記のように構成されたインバータ駆動式空気調和機に
おいては、第１及び第２の電動圧縮機（４Ａ） ＃ （
４Ｂ） が選択的に使用され、これに応じて切換弁（８
Ａ） ？ （８Ｂ） が冷媒回路を切シ換える。In the inverter-driven air conditioner configured as described above, the first and second electric compressors (4A) # (
4B) is selectively used, and the switching valve (8B) is used accordingly.
A)? (8B) switches the refrigerant circuit.
すなわち、１２０Ｈｚ以上の高速運転が必要な温度条件
下では、制御装置（図示しない）の信号によシ第２の電
動圧縮機（４Ｂ）にインバータ（３）の出力が供給され
ると共に、切換弁（８Ａ） ＊ （８Ｂ） によシ第
２の電動圧縮機（４Ｂ）が室内側及び室外側熱交換器（
５１，（７１に接続される。これで、第２の電動圧縮機
（４Ｂ）は始動し２回転速度が上昇した後空調負荷に応
じた１２０〜１）１０１）ｚ間の所要周波数で連続運転
される。一方、低空調負荷時には、第１の電動圧縮機（
４Ａ）にインバータ（３）の出力が供給されると共に、
切換弁（８Ａ） 、 （８Ｂ）により第１の電動圧縮機
（４Ａ）が室内側及び室外側熱交換器ｔ５１． ！７＞
に接続される。これで、第１の電動圧縮機（４Ｂ）は２
０〜１２０Ｈｚを周波数範囲として、負荷に応じた周波
数で連続運転される。また、２０Ｈｚ未満の超低負荷領
域では、温度調節による断続運転が実施される。That is, under temperature conditions that require high-speed operation of 120 Hz or higher, the output of the inverter (3) is supplied to the second electric compressor (4B) according to a signal from a control device (not shown), and the switching valve (8A) * (8B) The second electric compressor (4B) connects the indoor and outdoor heat exchangers (
51, (71).Now, the second electric compressor (4B) starts and after the rotational speed increases by 2, it continuously operates at the required frequency between 120 and 1)101)z according to the air conditioning load. be done. On the other hand, when the air conditioning load is low, the first electric compressor (
4A) is supplied with the output of the inverter (3),
The first electric compressor (4A) is switched between the indoor and outdoor heat exchangers t51. by the switching valves (8A) and (8B). ! 7>
connected to. The first electric compressor (4B) is now 2
The frequency range is 0 to 120 Hz, and continuous operation is performed at a frequency depending on the load. Furthermore, in an ultra-low load region of less than 20 Hz, intermittent operation is performed by temperature control.
第２図はこの発明の他の実施例を示す構成図で。FIG. 2 is a configuration diagram showing another embodiment of the present invention.
第２の電動圧縮機（４Ｂ）として遠心式電動圧縮機が用
いられている。そして、第１の電動圧縮機（４ム）には
専用のコンバータ（２人）及びインバータ（３Ａ）が接
続され、第２の電動圧縮機（４Ｂ）にハ専用のコンバー
タ（２Ｂ） 及びインバータ（３Ｂ）が接続されてい
る。上記以外は第１図と同様である。なお、第１の電動
圧縮４１ （４Ａ） の運転周波数域は２０〜１５
ＧＨｚ、第２の電動圧縮機（４Ｂ）の運転周波数域は２
０〜３００Ｈｚである。A centrifugal electric compressor is used as the second electric compressor (4B). A dedicated converter (2 persons) and an inverter (3A) are connected to the first electric compressor (4M), and a dedicated converter (2B) and an inverter (3A) are connected to the second electric compressor (4B). 3B) is connected. Other than the above, the configuration is the same as in FIG. 1. Note that the operating frequency range of the first electric compression 41 (4A) is 20 to 15
GHz, the operating frequency range of the second electric compressor (4B) is 2
The frequency is 0 to 300Hz.
１５０Ｈｚ以上の高速運転が必要な条件では、第２の電
動圧縮ｉｆ！ｋ（４Ｂ） がコンバータ（２Ｂ）及びイ
ンバータ（３Ｂ）を介して始動され２回転速度が上昇し
た後空調負荷に応じた１５０〜３００Ｈｚ間の所要周波
数で連続運転される。第１及び第２の電動圧縮機（４Ａ
） 、 （４Ｂ） Ｋそれぞれ専用のインバータ（３
Ａ）、（３Ｂ）が接続されているので、各電動圧縮機（
４Ａ） ＃ （４Ｂ） の特性に応じたインバータ（
３ム） ）（３Ｂ）の特性を選択し得る。Under conditions that require high-speed operation of 150Hz or higher, the second electric compression if! k(4B) is started via the converter (2B) and inverter (3B), and after the rotational speed has increased by two, it is continuously operated at a required frequency between 150 and 300 Hz depending on the air conditioning load. First and second electric compressors (4A
), (4B) K dedicated inverter (3
A) and (3B) are connected, so each electric compressor (
4A) # (4B) Inverter (
(3B) can be selected.
〔発明の効果〕
以上説明したとおシこの発明は、インバータ駆動式空気
調和機の電動圧縮機を、それぞれ運転周波数域が異なる
第１及び第２の電動圧縮ＭｉＦＣよ多構成し、これらを
管路で並列に接続し、この接続点に切換弁を設け、第１
及び第２の電動圧縮機のいずれか一方を選択運転し、こ
れに応じて切換弁によシ第１及び第２の電動圧縮機の一
方を空気調和機の室内側熱交換器及び室外側熱交換器に
接続するよ５にしたものである。[Effects of the Invention] As described above, the present invention configures the electric compressor of an inverter-driven air conditioner with a plurality of first and second electric compression MiFCs each having a different operating frequency range, and connects these to a conduit. Connect in parallel with each other, install a switching valve at this connection point, and
and the second electric compressor is selectively operated, and the switching valve accordingly switches one of the first and second electric compressors to the indoor heat exchanger and the outdoor heat exchanger of the air conditioner. 5 to connect to the exchanger.
これによ〕、第１及び第２の電動圧縮機をそれぞれ低速
及び高速に対応し℃設定することによ）低空調負荷時の
高効率維持と、超高速回転による急速冷房及び急速暖房
時の信頼性の向上を図ることができる効果がある。By setting the first and second electric compressors to correspond to low and high speeds, respectively), it is possible to maintain high efficiency during low air conditioning loads, and to maintain high efficiency during rapid cooling and rapid heating due to ultra-high speed rotation. This has the effect of improving reliability.
第１図はこの発明によるインバータ駆動式空気調和機の
一実施例を示す構成図、第２図はこの発明の他の実施例
を示す構成図、第３図は従来のインバータ駆動式空気調
和機を示す構成図である。
図中、 （３１，（３Ａ） 、 （ＩＢ ）はインバー
タ、（４Ａ）は第１の電動圧縮機、（４Ｂ）は第２の電
動圧縮機。
（５）は室内側熱交換器、（６）は減圧器、（））は室
外側熱交換器ｅ （８Ａ）ｊ（８Ｂ） は切換弁であ
る。
なお２図中同一符号は同−又は相当部分を示す。Fig. 1 is a block diagram showing one embodiment of an inverter-driven air conditioner according to the present invention, Fig. 2 is a block diagram showing another embodiment of the invention, and Fig. 3 is a conventional inverter-driven air conditioner. FIG. In the figure, (31, (3A), (IB) are inverters, (4A) is the first electric compressor, (4B) is the second electric compressor, (5) is the indoor heat exchanger, (6 ) is a pressure reducer, ()) is an outdoor heat exchanger e (8A) j (8B) is a switching valve. Note that the same reference numerals in the two figures indicate the same or equivalent parts.
Claims (4)
の三相交流を電動圧縮機に供給して、この電動圧縮機に
順次管路で接続された室内側熱交換器、減圧器及び室外
側熱交換器からなる冷媒サイクルを駆動するものにおい
て、互いに管路で並列に接続されそれぞれ運転周波数域
が異なりかついずれか一方が選択運転される第１の電動
圧縮機及び第２の電動圧縮機と、この第１及び第２の電
動圧縮機の管路の接続点に設けられ上記選択運転に応じ
て上記第１及び第２の電動圧縮機の一方を上記室内側熱
交換器及び室外側熱交換器に接続する切換弁とを備えた
ことを特徴とするインバータ駆動式空気調和機。(1) Three-phase alternating current with variable voltage and variable frequency generated from the inverter is supplied to the electric compressor, and the indoor heat exchanger, pressure reducer, and outdoor heat are connected to the electric compressor in sequence through pipes. A first electric compressor and a second electric compressor that drive a refrigerant cycle consisting of an exchanger are connected in parallel with each other via a conduit, each having a different operating frequency range, and one of which is selectively operated; A connecting point between the first and second electric compressors is provided at a connection point between the pipelines of the first and second electric compressors to connect one of the first and second electric compressors to the indoor heat exchanger and the outdoor heat exchanger according to the selected operation. An inverter-driven air conditioner characterized by comprising a switching valve connected to.
、第２の電動圧縮機を高周波域で運転する特許請求の範
囲第１項記載のインバータ駆動式空気調和機。(2) The inverter-driven air conditioner according to claim 1, wherein the first electric compressor is operated in a low frequency range of three-phase alternating current, and the second electric compressor is operated in a high frequency range.
、第２の電動圧縮機として遠心形電動圧縮機を用いた特
許請求の範囲第１項記載のインバータ駆動式空気調和機
。(3) The inverter-driven air conditioner according to claim 1, wherein a positive displacement electric compressor is used as the first electric compressor, and a centrifugal electric compressor is used as the second electric compressor.
けた特許請求の範囲第１項記載のインバータ駆動式空気
調和機。(4) The inverter-driven air conditioner according to claim 1, wherein an inverter is provided for each of the first and second electric compressors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60101006A JPS61259045A (en) | 1985-05-13 | 1985-05-13 | Air conditioner of inverter driven type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60101006A JPS61259045A (en) | 1985-05-13 | 1985-05-13 | Air conditioner of inverter driven type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61259045A true JPS61259045A (en) | 1986-11-17 |
| JPH0522825B2 JPH0522825B2 (en) | 1993-03-30 |
Family
ID=14289161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60101006A Granted JPS61259045A (en) | 1985-05-13 | 1985-05-13 | Air conditioner of inverter driven type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61259045A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249675A2 (en) * | 2001-04-12 | 2002-10-16 | Linde Aktiengesellschaft | Set of compressors and method for controlling a set of compressors |
| EP1288595A1 (en) * | 2001-08-27 | 2003-03-05 | Linde Aktiengesellschaft | Compressor set and method of controlling a compressor set |
| US7814964B2 (en) * | 2005-09-29 | 2010-10-19 | Greer J Rex | Isolation valve for main and auxiliary vehicle air conditioning system |
| CN109282448A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | It is a kind of to reach the air conditioning control method and air conditioner that shut down after set temperature |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54176250U (en) * | 1978-06-01 | 1979-12-12 | ||
| JPS59221546A (en) * | 1983-05-30 | 1984-12-13 | Toshiba Corp | Air conditioner |
-
1985
- 1985-05-13 JP JP60101006A patent/JPS61259045A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54176250U (en) * | 1978-06-01 | 1979-12-12 | ||
| JPS59221546A (en) * | 1983-05-30 | 1984-12-13 | Toshiba Corp | Air conditioner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249675A2 (en) * | 2001-04-12 | 2002-10-16 | Linde Aktiengesellschaft | Set of compressors and method for controlling a set of compressors |
| EP1249675A3 (en) * | 2001-04-12 | 2003-01-29 | Linde Aktiengesellschaft | Set of compressors and method for controlling a set of compressors |
| EP1288595A1 (en) * | 2001-08-27 | 2003-03-05 | Linde Aktiengesellschaft | Compressor set and method of controlling a compressor set |
| US7814964B2 (en) * | 2005-09-29 | 2010-10-19 | Greer J Rex | Isolation valve for main and auxiliary vehicle air conditioning system |
| CN109282448A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | It is a kind of to reach the air conditioning control method and air conditioner that shut down after set temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0522825B2 (en) | 1993-03-30 |
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