JP2597011B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2597011B2 JP2597011B2 JP1217446A JP21744689A JP2597011B2 JP 2597011 B2 JP2597011 B2 JP 2597011B2 JP 1217446 A JP1217446 A JP 1217446A JP 21744689 A JP21744689 A JP 21744689A JP 2597011 B2 JP2597011 B2 JP 2597011B2
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- load state
- compressor
- temperature sensor
- electronic expansion
- 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 - Fee Related
Links
Landscapes
- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は空気調和機に関する。Description: TECHNICAL FIELD The present invention relates to an air conditioner.
（従来の技術） 従来の空気調和機の冷媒回路が第４図に示されてい
る。(Prior Art) FIG. 4 shows a refrigerant circuit of a conventional air conditioner.
冷房運転時、インバータ駆動圧縮機１から吐出された
冷媒ガスは、実線矢印で示すように、四方切換弁２を経
て室外熱交換器３に入り、ここでモータ９によって駆動
される室外ファン10から送られる外気に放熱することに
よって凝縮液化する。次いで、この冷媒液は電子膨張弁
４に入り、ここで絞られることにより減圧された後、室
内熱交換器５に入り、ここでモータ８によって駆動され
る室内ファン11によって送風される室内空気を冷却する
ことによって蒸発気化する。次いで、この冷媒ガスは四
方切換弁２、アキュムレータ６を経てインバータ駆動圧
縮機１に戻る。During the cooling operation, the refrigerant gas discharged from the inverter-driven compressor 1 enters the outdoor heat exchanger 3 through the four-way switching valve 2 as shown by the solid line arrow, and from the outdoor fan 10 driven by the motor 9 here. It is condensed and liquefied by releasing heat to the sent outside air. Next, the refrigerant liquid enters the electronic expansion valve 4, is reduced in pressure by being throttled here, and then enters the indoor heat exchanger 5, where the indoor air blown by the indoor fan 11 driven by the motor 8 is removed. It evaporates by cooling. Next, the refrigerant gas returns to the inverter-driven compressor 1 via the four-way switching valve 2 and the accumulator 6.
暖房運転時、冷媒は、破線矢印で示すように、インバ
ータ駆動圧縮機１、四方切換弁２、室内熱交換器５、電
子膨張弁４、室外熱交換器３、四方切換弁２、アキュム
レータ６をこの順に循環する。During the heating operation, the refrigerant flows through the inverter-driven compressor 1, the four-way switching valve 2, the indoor heat exchanger 5, the electronic expansion valve 4, the outdoor heat exchanger 3, the four-way switching valve 2, and the accumulator 6, as indicated by the dashed arrows. Circulate in this order.
室温センサ７によって検知された室内温度等がコント
ローラ20に入力され、このコントローラ20からの指令は
圧縮機駆動用インバータ12、四方切換弁２、電子膨張弁
４、モータ８、９等に出力される。The room temperature and the like detected by the room temperature sensor 7 are input to the controller 20, and commands from the controller 20 are output to the compressor driving inverter 12, the four-way switching valve 2, the electronic expansion valve 4, the motors 8, 9 and the like. .
第５図にはコントローラ20の制御ブロック図が示され
ている。FIG. 5 is a control block diagram of the controller 20.
室温センサ７によって検知された室温はコントローラ
20の比較手段21に入力され、ここで温度設定器22で設定
された設定温度と比較されることにより両者の偏差が算
出される。この偏差は周波数決定手段23に入力され、こ
こで記憶手段24からの入力に応じて周波数が決定され
る。なお、記憶手段24には偏差に対応する周波数が予め
定められて記憶されている。決定された周波数は出力手
段25を経てインバータ12に出力され、ここで圧縮機１に
供給される電流の周波数を上記決定された周波数に変更
する。かくして、空気調和機の空調能力は空調負荷に応
じた値となる。The room temperature detected by the room temperature sensor 7 is a controller
The difference between the two is input to the comparing means 21 and compared with the set temperature set by the temperature setter 22 here. This deviation is input to the frequency determination means 23, where the frequency is determined according to the input from the storage means 24. The frequency corresponding to the deviation is stored in the storage means 24 in advance. The determined frequency is output to the inverter 12 via the output means 25, where the frequency of the current supplied to the compressor 1 is changed to the determined frequency. Thus, the air conditioning capacity of the air conditioner has a value corresponding to the air conditioning load.
周波数決定手段23で決定された周波数は膨張弁開度決
定手段26に入力され、ここで記憶手段27からの入力に応
じて膨張弁開度が決定される。なお、記憶手段27には、
第６図に示すように、周波数に対応する膨張弁開度が予
め定められて記憶されている。決定された膨張弁開度は
出力手段28を経て電子膨張弁４に出力され、電子膨張弁
４の開度は上記決定された開度となる。The frequency determined by the frequency determination means 23 is input to the expansion valve opening degree determination means 26, where the expansion valve opening degree is determined according to the input from the storage means 27. The storage means 27 has
As shown in FIG. 6, the expansion valve opening corresponding to the frequency is predetermined and stored. The determined expansion valve opening is output to the electronic expansion valve 4 via the output means 28, and the opening of the electronic expansion valve 4 becomes the determined opening.
（発明が解決しようとする課題） 上記従来の空気調和機においては、インバータ12の周
波数と電子膨張弁４の開度は、第６図に示すように、ほ
ぼ一対の関係で対応しているため、圧縮機１が過負荷状
態となると、冷媒の循環量が足りなくなり、圧縮機１の
能力が不足する。一方、圧縮機１が軽負荷状態となる
と、冷媒の循環量が過剰となり、圧縮機１の能力が過大
となるという不具合があった。(Problems to be Solved by the Invention) In the above-described conventional air conditioner, the frequency of the inverter 12 and the opening degree of the electronic expansion valve 4 correspond substantially in a pair as shown in FIG. When the compressor 1 is overloaded, the circulation amount of the refrigerant becomes insufficient, and the capacity of the compressor 1 becomes insufficient. On the other hand, when the compressor 1 is in a light load state, there is a problem that the amount of circulating refrigerant becomes excessive and the capacity of the compressor 1 becomes excessive.
（課題を解決するための手段） 本発明は上記課題を解決するために発明されたもので
あって、その要旨とするところは、インバータ駆動圧縮
機及び電子膨張弁を備え、上記電子膨張弁の開度を上記
インバータの周波数に対応させて制御する空気調和機に
おいて、室温を検知する室温センサと、外気温を検知す
る外気温センサと、これら室温センサ及び外気温センサ
の検知温度から上記圧縮機の負荷状態を検知する負荷状
態検知手段と、この負荷状態検知手段が過負荷又は軽負
荷を検知したときこれに応じて上記電子膨張弁の開度を
補正する膨張弁開度補正手段を設けたことを特徴とする
空気調和機にある。(Means for Solving the Problems) The present invention was invented to solve the above problems, and the gist of the present invention is to provide an inverter-driven compressor and an electronic expansion valve. In an air conditioner that controls the opening in accordance with the frequency of the inverter, a room temperature sensor for detecting a room temperature, an outside air temperature sensor for detecting an outside air temperature, and the compressor based on the detected temperatures of the room temperature sensor and the outside air temperature sensor. Load state detecting means for detecting a load state of the electronic expansion valve, and an expansion valve opening correction means for correcting the degree of opening of the electronic expansion valve in response to the detection of overload or light load. An air conditioner characterized in that:
（作用） 本発明においては、上記構成を具えているため、圧縮
機の過負荷又は軽負荷が検知されたとき、これに応じて
電子膨張弁の開度が補正される。(Operation) In the present invention, since the above configuration is provided, when an overload or a light load of the compressor is detected, the opening of the electronic expansion valve is corrected accordingly.
（実施例） 本発明の１実施例が第１図ないし第３図に示されてい
る。(Embodiment) One embodiment of the present invention is shown in FIG. 1 to FIG.
第３図に示すように、外気温を検知する外気温センサ
13が設けられ、このセンサ13の出力はコントローラ30に
入力される。そして、このコントローラ30からの指令は
インバータ12、四方切換弁２、モータ９、モータ８及び
電子膨張弁４に出力される。As shown in FIG. 3, an outside air temperature sensor for detecting the outside air temperature
The output of the sensor 13 is input to the controller 30. The command from the controller 30 is output to the inverter 12, the four-way switching valve 2, the motor 9, the motor 8, and the electronic expansion valve 4.
他の構成は第５図に示す従来のものと同様であり、対
応する部材には同じ符号が付されている。Other configurations are the same as those of the conventional one shown in FIG. 5, and corresponding members are denoted by the same reference numerals.
コントローラ30の制御ブロック図が第１図に、フロー
チャートが第２図に示されている。A control block diagram of the controller 30 is shown in FIG. 1, and a flowchart is shown in FIG.
外気温センサ13で検知された外気温及び室温センサ７
で検知された室温はコントローラ30の負荷状態検知手段
31に入力され、ここで記憶手段35からの入力に応じて圧
縮機１の負荷状態が検知される。なお、記憶手段35には
第１表に示す判断基準が予め定められて記憶されてい
る。Outside temperature and room temperature sensor 7 detected by outside temperature sensor 13
The room temperature detected by the load condition detection means of the controller 30
The load is input to the storage 31, where the load state of the compressor 1 is detected according to the input from the storage means 35. It should be noted that the storage unit 35 stores predetermined determination criteria shown in Table 1.
例えば、冷房運転時には外気温T0がＡ℃以上で、か
つ、室温TiがＣ℃以上であれば、過負荷状態と判断され
る。外気温T0がＢ℃以下で、かつ、室温TiがＤ℃以下で
あれば軽負荷状態と判断される。外気温T0がＡ℃以下、
Ｂ℃以上で、かつ、室温TiがＣ℃以下、Ｄ℃以上であれ
ば通常負荷状態と判断される。 For example, during the cooling operation, if the outside air temperature T 0 is equal to or higher than A ° C. and the room temperature Ti is equal to or higher than C ° C., it is determined that an overload state is present. If the outside air temperature T 0 is equal to or lower than B ° C. and the room temperature Ti is equal to or lower than D ° C., it is determined that the load is light. Outside temperature T 0 is below A ° C,
When the temperature is equal to or higher than B ° C. and the room temperature Ti is equal to or lower than C ° C. and equal to or higher than D ° C., it is determined that the load is normal.
負荷状態検知手段31で検知された負荷状態は膨張弁開
度補正手段32に入力されここで膨張弁開度決定手段26で
決定された膨張弁開度を記憶手段33からの入力に応じて
補正する。なお、記憶手段33には負荷状態に対応する補
正量が予め定められて記憶されており、例えば、過負荷
状態であれば、膨張弁開度は1.3倍に、通常負荷状態で
あれば、1.0倍に、軽負荷であれば、0.9倍とされる。The load state detected by the load state detection unit 31 is input to the expansion valve opening correction unit 32, and the expansion valve opening determined by the expansion valve opening determination unit 26 is corrected according to the input from the storage unit 33. I do. The correction amount corresponding to the load state is predetermined and stored in the storage unit 33.For example, the expansion valve opening is 1.3 times in an overload state, and is 1.0 in a normal load state. If the load is light, it will be 0.9 times.
膨張弁開度補正手段32で補正された膨張弁開度は出力
手段28を経て電子膨張弁４に出力され、電子膨張弁４の
開度は補正された開度となる。The expansion valve opening corrected by the expansion valve opening correction means 32 is output to the electronic expansion valve 4 via the output means 28, and the opening of the electronic expansion valve 4 becomes the corrected opening.
他の構成、作用は第５図に示す従来のものと同様であ
り、対応する部材には同じ符号が付されている。Other configurations and operations are the same as those of the conventional one shown in FIG. 5, and corresponding members are denoted by the same reference numerals.
かくして、圧縮機１が通常負荷状態であれば、電子膨
張弁４の開度は膨張弁開度決定手段26で決定された開
度、即ち、従来のものと同様インバータ12の周波数に一
対一で対応した開度となるが、過負荷状態であれば、通
常負荷状態のときより大きな開度となって冷媒の循環量
が増大し、軽負荷状態であれば、通常負荷状態のそれよ
り小さな開度となって冷媒の循環量は減少する。Thus, when the compressor 1 is in the normal load state, the opening degree of the electronic expansion valve 4 is one-to-one corresponding to the opening degree determined by the expansion valve opening degree determining means 26, that is, the frequency of the inverter 12 as in the conventional case. The opening degree is corresponding to that, but in an overload state, the opening degree becomes larger than in the normal load state and the circulation amount of the refrigerant increases, and in a light load state, the opening degree becomes smaller than that in the normal load state. The amount of the refrigerant circulated decreases at a time.
（発明の効果） 本発明においては、室温を検知する室温センサと、外
気温を検知する外気温センサと、これら室温センサ及び
外気温センサの検知温度から圧縮機の負荷状態を検知す
る負荷状態検知手段を設けたため、圧縮機の負荷を容易
に検知できる。(Effects of the Invention) In the present invention, a room temperature sensor for detecting a room temperature, an outside air temperature sensor for detecting an outside air temperature, and a load state detection for detecting a load state of a compressor from the detected temperatures of the room temperature sensor and the outside air temperature sensor. Since the means is provided, the load on the compressor can be easily detected.
そして、この負荷状態検知手段が過負荷又は軽負荷を
検知したときこれに応じて上記電子膨張弁の開度を補正
する膨張弁開度補正手段を設けたため、圧縮機の負荷状
態に応じて電子膨張弁の開度を補正して冷媒循環量を制
御できるので、圧縮機の能力過大、過少を迅速に解消で
きるとともに室温を設定温度に短時間で到達させること
ができる。When the load state detecting means detects an overload or a light load, expansion valve opening correction means for correcting the opening of the electronic expansion valve in response to the detection is provided. Since the refrigerant circulation amount can be controlled by correcting the degree of opening of the expansion valve, it is possible to quickly eliminate excessive or insufficient capacity of the compressor and to reach room temperature to the set temperature in a short time.
第１図ないし第３図は本発明の１実施例を示し、第１図
は制御ブロック図、第２図はフローチャート、第３図は
系統図である。第４図ないし第６図は従来の空気調和機
の１例を示し、第４図は系統図、第５図は制御ブロック
図、第６図はインバータ周波数と膨張弁開度との関係を
示す線図である。 インバータ駆動圧縮機……１、電子膨張弁……４、イン
バータ……12、コントローラ……30、負荷状態検知手段
……31、膨張弁開度補正手段……321 to 3 show an embodiment of the present invention. FIG. 1 is a control block diagram, FIG. 2 is a flowchart, and FIG. 3 is a system diagram. 4 to 6 show an example of a conventional air conditioner, FIG. 4 is a system diagram, FIG. 5 is a control block diagram, and FIG. 6 shows a relationship between an inverter frequency and an expansion valve opening. FIG. Inverter driven compressor 1, Electronic expansion valve 4, Inverter 12, Controller 30, Load state detecting means 31, Expansion valve opening correction means 32
Claims (1)
え、上記電子膨張弁の開度を上記インバータの周波数に
対応させて制御する空気調和機において、室温を検知す
る室温センサと、外気温を検知する外気温センサと、こ
れら室温センサ及び外気温センサの検知温度から上記圧
縮機の負荷状態を検知する負荷状態検知手段と、この負
荷状態検知手段が過負荷又は軽負荷を検知したときこれ
に応じて上記電子膨張弁の開度を補正する膨張弁開度補
正手段を設けたことを特徴とする空気調和機。1. An air conditioner comprising an inverter-driven compressor and an electronic expansion valve, wherein an opening degree of the electronic expansion valve is controlled in accordance with a frequency of the inverter. An outside air temperature sensor for detecting, a load state detection means for detecting a load state of the compressor from the detected temperatures of the room temperature sensor and the outside air temperature sensor, and a load state detection means when the load state detection means detects an overload or a light load. An air conditioner comprising an expansion valve opening correction means for correcting the opening of the electronic expansion valve accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1217446A JP2597011B2 (en) | 1989-08-25 | 1989-08-25 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1217446A JP2597011B2 (en) | 1989-08-25 | 1989-08-25 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0384364A JPH0384364A (en) | 1991-04-09 |
| JP2597011B2 true JP2597011B2 (en) | 1997-04-02 |
Family
ID=16704367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1217446A Expired - Fee Related JP2597011B2 (en) | 1989-08-25 | 1989-08-25 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2597011B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4836573B2 (en) * | 2005-12-27 | 2011-12-14 | 東芝キヤリア株式会社 | Air conditioner and control method of air conditioner |
| KR100779536B1 (en) * | 2006-09-05 | 2007-11-27 | 주식회사 대우일렉트로닉스 | Method for correcting capacity of compressor of air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63290354A (en) * | 1987-05-21 | 1988-11-28 | 松下冷機株式会社 | Heat pump type air conditioner |
| JPH0714772Y2 (en) * | 1988-02-16 | 1995-04-10 | 三菱重工業株式会社 | Refrigeration cycle |
-
1989
- 1989-08-25 JP JP1217446A patent/JP2597011B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0384364A (en) | 1991-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |