JPH0522825B2 - - Google Patents
Info
- Publication number
- JPH0522825B2 JPH0522825B2 JP60101006A JP10100685A JPH0522825B2 JP H0522825 B2 JPH0522825 B2 JP H0522825B2 JP 60101006 A JP60101006 A JP 60101006A JP 10100685 A JP10100685 A JP 10100685A JP H0522825 B2 JPH0522825 B2 JP H0522825B2
- Authority
- JP
- Japan
- Prior art keywords
- electric compressor
- inverter
- heat exchanger
- electric
- air conditioner
- 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.)
- Expired - Lifetime
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
Landscapes
- Air Conditioning Control Device (AREA)
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 Application 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、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
より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６と電動圧縮機４に管路で接続さ
れた空気調和機の室外側熱交換器である。 In the diagram, 1 is a commercial single-phase AC power supply, 2 is an AC power supply 1
Converter 3 is connected to converter 2 to convert single-phase alternating current to direct current; 3 is an inverter connected to converter 2 and converts direct current to three-phase alternating current with variable voltage and variable frequency; 4 is driven by an induction motor connected to inverter 3. an electric compressor, 5 an indoor heat exchanger of an air conditioner connected to the electric compressor 4 through a pipe;
6 is a pressure reducer connected to the indoor heat exchanger 5 through a pipe line, and 7 is an outdoor heat exchanger of the air conditioner connected to the pressure reducer 6 and the electric compressor 4 through a pipe line.
従来のインバータ駆動式空気調和機は上記のよ
うに構成され、商用単相交流電源１はコンバータ
２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
の特性によつ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、低圧ガスとなつて再び電動圧縮
機４に吸入されて高圧化される。また、冷房運転
においては、冷媒の流れは上記とは逆に４→７→
６→５→４となる。 A conventional inverter-driven air conditioner is configured as described above, in which a commercial single-phase AC power source 1 is converted to a three-phase AC power source via a converter 2 and an inverter 3, and the AC voltage and frequency are controlled by the inverter 3.
has a certain correlation determined by the characteristics of On the other hand, the electric compressor 4, the indoor heat exchanger 5, the pressure reducer 6, and the outdoor heat exchanger 7 constitute a refrigerant cycle, and in heating operation, the high-pressure refrigerant discharged from the electric compressor 4 is The refrigerant flows through the refrigerant cycle in the order of 6→7, becomes low-pressure gas, and is sucked into the electric compressor 4 again, where the pressure is increased. In addition, during cooling operation, the flow of refrigerant is reversed from 4→7→
6 → 5 → 4.
単位時間当たりの冷房又は暖房能力は、インバ
ータ３により負荷側周波数を制御して、電動圧縮
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
なつているが、一部全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 adjusted by controlling the load side frequency using the inverter 3 and changing the rotational speed of the electric compressor 4. The load-side frequency range of currently commonly used inverter-driven air conditioners is approximately 20 to 150 Hz.
Furthermore, as the electric compressor 4, fully hermetic rolling piston type rotary compressors (displacement type) are mainstream, but some fully 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、
電動圧縮機の回転速度をいつ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３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
には機械損失の増大、摩耗の激化等を生じやす
い。そのため、いつ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。
In the conventional inverter-driven air conditioner as described above, when rapid cooling or rapid heating is required, such as when starting air conditioning (hereinafter referred to as air conditioning),
When is it necessary to increase the rotational speed of the electric compressor? However, while there is no particular technical problem with the inverter 3 on the power supply side, the electric compressor 4 on the load side is a positive displacement type with the aim of maintaining performance at low speeds, so it rotates at high speeds. In some cases, increased mechanical loss and intensified wear tend to occur. Therefore, there is a problem in that any increase in speed will 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、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駆動式空気調
和機を提供することを目的とする。 This invention was made to solve the above problems, and it uses an inverter drive that enables rapid cooling and rapid heating under ultra-high speed rotation while maintaining the efficiency of the electric compressor during normal low-speed rotation. The purpose is to provide a type air conditioner.
この発明に係るインバータ駆動式空気調和機
は、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。
The inverter-driven air conditioner according to the present invention connects a first electric compressor and a second electric compressor, each having different operating frequency ranges, in parallel through a conduit, selectively operates one of them, and operates the first electric compressor in parallel. and a switching valve is provided at the connection point of the second electric compressor, and one of the first and second electric compressors is connected to the indoor heat exchanger and the outdoor heat exchanger depending on the selected operation. This is what I did.
〔作 用〕
この発明においては、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に信頼性の高い第２の電動
圧縮機が運転される。[Function] In the present invention, during normal operation, the first electric compressor, which is highly efficient at low speed rotation, is operated, and when air conditioning is started, the second electric compressor, which is highly reliable at high speed rotation, is operated.
第１図はこの発明の一実施例を示す構成図で、
１〜３、５〜７は上記従来装置と同様なものであ
る。
FIG. 1 is a configuration diagram showing an embodiment of the present invention.
1 to 3 and 5 to 7 are similar to the above conventional device.
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４
Ａは従来の電動圧縮機４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、
摺動部品間の隙間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つている。
８Ａ，８Ｂは第１及び第２の電動圧縮機４Ａ，４
Ｂ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。 In the figure, 4A and 4B are first and second electric compressors connected in parallel with each other through conduits, both of which are completely hermetic rotary compressors.
A has the same specifications as the conventional electric compressor 4, whereas the second electric compressor 4B uses lubricating oil, sliding materials,
The gaps between sliding parts are set to correspond to high speed rotation, and performance in low speed rotation ranges is poor.
8A, 8B are the first and second electric compressors 4A, 4
The switching valve 8A is connected to the indoor heat exchanger 5, and the switching valve 8B is connected to the outdoor heat exchanger 7. ing.
なお、第１の電動圧縮機４Ａの運転周波数域は
20〜120Hz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。 Note that the operating frequency range of the first electric compressor 4A is
It is assumed that the operating frequency range of the second electric compressor 4B is 120 to 180 Hz.
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４
Ａ，４Ｂが選択的に使用され、これに応じて切換
弁８Ａ，８Ｂが冷媒回路を切り換える。 In the inverter-driven air conditioner configured as described above, the first and second electric compressors 4
A and 4B are selectively used, and the switching valves 8A and 8B switch the refrigerant circuit accordingly.
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
り第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により第２
の電動圧縮機４Ｂが室内側及び室外側熱交換器
５，７に接続される。これで、第２の電動圧縮機
４Ｂは始動し、回転速度が上昇した後空調負荷に
応じた120〜180Hz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５，７に接続される。
これで、第１の電動圧縮機４Ｂは20〜120Hz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 by a signal from a control device (not shown), and the output of the inverter 3 is supplied to the second electric compressor 4B by the switching valves 8A and 8B.
An electric compressor 4B is connected to the indoor and outdoor heat exchangers 5 and 7. The second electric compressor 4B is now started, and after the rotational speed has increased, it is continuously operated at a required frequency between 120 and 180 Hz depending on the air conditioning load. On the other hand, when the air conditioning load is low, the output of the inverter 3 is supplied to the first electric compressor 4A, and
The first electric compressor 4A is connected to the indoor and outdoor heat exchangers 5 and 7 by the switching valves 8A and 8B.
With this, the first electric compressor 4B is continuously operated at a frequency corresponding to the load within a frequency range of 20 to 120 Hz. In addition, in the ultra-low load range of less than 20Hz, intermittent operation with temperature control is implemented.
第２図はこの発明の他の実施例を示す構成図
で、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
４Ａには専用のコンバータ２Ａ及びインバータ３
Ａが接続され、第２の電動圧縮機４Ｂには専用の
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の電動圧縮機４Ａの運転周波数域は20〜150Hz、
第２の電動圧縮機４Ｂの運転周波数域は20〜300
Hzである。 FIG. 2 is a block diagram showing another embodiment of the present invention, in which a centrifugal electric compressor is used as the second electric compressor 4B. The first electric compressor 4A has a dedicated converter 2A and an inverter 3.
A is connected to the second electric compressor 4B, and a dedicated converter 2B and an inverter 3B are connected to the second electric compressor 4B. Other than the above, the configuration is the same as in FIG. 1. The operating frequency range of the first electric compressor 4A is 20 to 150Hz,
The operating frequency range of the second electric compressor 4B is 20 to 300
It is Hz.
150Hz以上の高速運転が必要な条件では、第２
の電動圧縮機４Ｂがコンバータ２Ｂ及びインバー
タ３Ｂを介して始動され、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にそれぞれ専用のインバータ３Ａ，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３Ａ，３Ｂの特性を選択し
得る。 In conditions that require high-speed operation of 150Hz or higher, the second
The electric compressor 4B is started via the converter 2B and the inverter 3B, and after the rotational speed has increased, it is continuously operated at a required frequency of 150 to 300 Hz depending on the air conditioning load. first and second electric compressors 4A,
Since dedicated inverters 3A and 3B are connected to each electric compressor 4B, the characteristics of the inverters 3A and 3B can be selected according to the characteristics of each electric compressor 4A and 4B.
以上説明したとおりこの発明は、インバータ駆
動式空気調和機の電動圧縮機を、それぞれ低周波
域で運転される第１の電動圧縮機及び高周波域で
運転される第２の電動圧縮機により構成し、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り第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うにし
たものである。
As explained above, the present invention configures the electric compressor of an inverter-driven air conditioner to include a first electric compressor that operates in a low frequency range and a second electric compressor that operates in a high frequency range. , these are connected in parallel by a pipe, a switching valve is provided at this connection point, and either one of the first and second electric compressors is selectively operated, and the switching valve accordingly operates the first and second electric compressors. One of the electric compressors is connected to an indoor heat exchanger and an outdoor heat exchanger of an air conditioner.
これにより、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て設定することにより
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。 As a result, by setting the first and second electric compressors to correspond to low and high speeds, respectively, high efficiency can be maintained during low air conditioning loads, and ultra-high speed rotation improves reliability during rapid cooling and rapid heating. This has the effect of making it possible to achieve this goal.
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、３，３Ａ，３Ｂ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、７は室外側熱交換
器、８Ａ，８Ｂは切換弁である。なお、図中同一
符号は同一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, 3, 3A, 3B are inverters, 4A is a first electric compressor, 4B is a second electric compressor, 5 is an indoor heat exchanger, 6 is a pressure reducer, 7 is an outdoor heat exchanger, 8A and 8B are switching valves. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
波数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
に接続され低周波域で運転される容積形電動圧縮
機と高周波域で運転される遠心形電動圧縮機のい
ずれか一方が選択可能に設けられるとともに、こ
の選択された運転に応じて上記各電動圧縮機のい
ずれか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、運転領域に応じ
て効率の高い電動圧縮機を選択可能としたことを
特徴とするインバータ駆動式空気調和機。 ２ 上記インバータを上記各電動圧縮機ごとに設
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。[Claims] 1. An indoor heat exchanger and a pressure reducer that supply variable voltage/variable frequency three-phase alternating current generated from an inverter to an electric compressor, and are connected to the electric compressor in sequence through pipes. and a refrigerant cycle consisting of an outdoor heat exchanger, which is either a positive displacement electric compressor that is connected in parallel with each other through conduits and operates in a low frequency range, or a centrifugal electric compressor that operates in a high frequency range. or a switching valve that connects either one of the electric compressors to the indoor heat exchanger and the outdoor heat exchanger according to the selected operation. An inverter-driven air conditioner characterized by the ability to select a highly efficient electric compressor depending on the area. 2. The inverter-driven air conditioner according to claim 1, wherein the inverter is provided for each of the 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 JPS61259045A (en) | 1986-11-17 |
| JPH0522825B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10118444A1 (en) * | 2001-04-12 | 2002-10-17 | Linde Ag | Compressor set and method for regulating a compressor set |
| DE10141857A1 (en) * | 2001-08-27 | 2003-03-20 | Linde Ag | Compressor set and method for regulating a compressor set |
| US7814964B2 (en) * | 2005-09-29 | 2010-10-19 | Greer J Rex | Isolation valve for main and auxiliary vehicle air conditioning system |
| CN109282448B (en) * | 2018-09-19 | 2020-04-14 | 珠海格力电器股份有限公司 | An air conditioner control method and an air conditioner that will not stop after reaching a set temperature |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61259045A (en) | 1986-11-17 |
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