JP3418287B2 - Oil recovery control device for multi-type air conditioner - Google Patents
Oil recovery control device for multi-type air conditionerInfo
- Publication number
- JP3418287B2 JP3418287B2 JP33178295A JP33178295A JP3418287B2 JP 3418287 B2 JP3418287 B2 JP 3418287B2 JP 33178295 A JP33178295 A JP 33178295A JP 33178295 A JP33178295 A JP 33178295A JP 3418287 B2 JP3418287 B2 JP 3418287B2
- Authority
- JP
- Japan
- Prior art keywords
- oil recovery
- air conditioner
- type air
- compressor
- recovery control
- 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
Landscapes
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一台の室外機に複
数台の室内ユニットが接続できるマルチ式空気調和機に
係り、特に冷凍サイクル内に停留している油を回収でき
るマルチ式空気調和機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-type air conditioner in which a plurality of indoor units can be connected to one outdoor unit, and more particularly to a multi-type air conditioner capable of recovering oil retained in a refrigeration cycle. It is about machines.
【０００２】[0002]
【従来の技術】一台の室外機に複数台の室内ユニットを
接続したマルチ式空気調和機においては、所定時間運転
を行っていると運転していない室内ユニットに油が停留
し、サイクル内の油が不足する状態が発生するために油
回収制御を行っている。2. Description of the Related Art In a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit, oil stays in the indoor units that are not operating when operating for a predetermined time, and The oil recovery control is performed because the oil shortage occurs.
【０００３】従来のマルチ式空気調和機の油回収制御
は、冷凍サイクルの状態、外気温にはよらず、システム
が起動時に毎回行う方式や一定時間運転した後に油回収
制御を行う等の方式をとっていた。The oil recovery control of the conventional multi-type air conditioner does not depend on the state of the refrigeration cycle or the outside air temperature, and the system is performed every time the system is started or the system is operated for a certain period of time to perform the oil recovery control. I was taking it.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、システ
ムの起動時に毎回回収制御を行う場合は、短時間で繰り
返し起動される短断続運転が行われると不必要な回収運
転を行うことになり効率的でない。However, in the case of performing the recovery control every time the system is started, if the short intermittent operation that is repeatedly started in a short time is performed, unnecessary recovery operation is performed, which is not efficient. .
【０００５】また一定時間毎に回収制御を行う場合に
は、冷凍サイクルの状態によらず、定期的に回収するた
めに、回収不足となったり、不必要な回収運転を行った
りすることとなり、適切な回収ができない問題がある。Further, when the recovery control is performed at regular intervals, the recovery is insufficient regardless of the state of the refrigerating cycle, and the recovery operation may be performed unnecessarily. There is a problem that proper collection is not possible.
【０００６】そこで、本発明の目的は、上記課題を解決
し、冷凍サイクルの状態に応じた油回収制御が行えるマ
ルチ式空気調和機の油回収制御装置を提供することにあ
る。Therefore, an object of the present invention is to solve the above problems and to provide an oil recovery control device for a multi-type air conditioner which can perform oil recovery control according to the state of a refrigeration cycle.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、請求項１の発明は、冷房運転時、能力可変型圧縮機
の所定周波数以下での運転時間及び停止時間をカウント
する手段を備え、この検出値に基づいて各室内ユニット
の流量調整弁の開度を調整して油回収制御を行う手段を
備えたマルチ式空気調和機の油回収制御装置において、
圧縮機の停止時間を検出し、連続又は積算での停止時間
が所定時間以上となったとき、次の圧縮機の起動時に油
回収運転を行うことを特徴とするマルチ式空気調和機の
油回収制御装置である。In order to achieve the above-mentioned object, the invention of claim 1 is to provide a variable capacity compressor during cooling operation.
Counts the operating time and stop time below the specified frequency
And means for, the means for performing an oil recovery control by adjusting the opening of flow control valve of the indoor unit on the basis of the detection value
In the oil recovery control device of the equipped multi-type air conditioner,
Stop time of the compressor is detected, and the stop time is continuous or integrated.
Is exceeded for a certain period of time, the oil will be
The oil recovery control device for a multi-type air conditioner is characterized by performing a recovery operation .
【０００８】請求項２の発明は、冷房運転時、吐出冷媒
の圧力を検出する手段と、能力可変型圧縮機の所定周波
数以下での運転時間及び停止時間をカウントする手段と
を備え、これら検出値に基づいて各室内ユニットの流量
調整弁の開度を調整して油回収制御を行う手段を備えた
マルチ式空気調和機の油回収制御装置において、運転中
の圧縮機の吐出冷媒圧力を検出し、その圧力が設定圧力
以下での連続または積算運転時間が所定時間以上となっ
たとき、油回収運転を行うことを特徴とするマルチ式空
気調和機の油回収制御装置である。According to a second aspect of the present invention , the refrigerant discharged during cooling operation is discharged.
Of the pressure of the variable capacity type compressor
With a means to count the operating time and stop time below a number
And the flow rate of each indoor unit based on these detected values
Equipped with means to control the oil recovery by adjusting the opening of the adjusting valve
During operation of the oil recovery controller of the multi-type air conditioner
Detects the pressure of the refrigerant discharged from the compressor of the
The following continuous or integrated operation time is longer than the specified time
The multi-type air conditioner is characterized by performing an oil recovery operation when
It is the oil recovery control device of the air conditioner .
【０００９】請求項３の発明は、 油回収運転は、運転
周波数を指令された周波数より所定値高い周波数とする
と共に、停止中の室内ユニットの流量調整弁の開度を所
定値開くようにした請求項１又は２記載のマルチ式空気
調和機の油回収制御装置である。According to the invention of claim 3, the oil recovery operation is
Set the frequency higher than the commanded frequency by a specified value
In addition, the opening of the flow control valve of the indoor unit that is stopped
The multi-type air according to claim 1 or 2, which is configured to open a fixed value.
It is an oil recovery control device for a harmony machine .
【００１０】[0010]
【００１１】[0011]
【００１２】[0012]
【００１３】[0013]
【発明の実施の形態】以下、本発明の好適実施の形態を
添付図面に基づいて詳述する。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
【００１４】先ず図１により本発明の冷凍サイクルのシ
ステムを説明する。First, the refrigerating cycle system of the present invention will be described with reference to FIG.
【００１５】図１において、Ｘは室外機、Ｙは室外機Ｘ
に冷媒配管４，５で接続された複数台の室内ユニットで
ある。In FIG. 1, X is an outdoor unit and Y is an outdoor unit X.
It is a plurality of indoor units connected to the refrigerant pipes 4 and 5.
【００１６】室外機Ｘには、インバータ装置で駆動され
る能力可変型圧縮機１と商用電源で駆動される通常型圧
縮機２の２台が設けられ、その吐出側配管が合流されて
オイルセパレータ６，四方弁７を介して室外熱交換器８
に接続され、その室外熱交換器８に、膨張弁１２と逆止
弁９の並列回路を介してリキッドタンク１０が接続され
ると共にドライヤ１１を介して室内ユニットＹと接続す
る一方の配管４に接続される。また、室内ユニットＹか
らの他方の配管５は、ストレーナ１５，四方弁７，アキ
ュムレータ１４を介し、それぞれ分岐されて圧縮機１，
２の吸込側に接続される。The outdoor unit X is provided with two units, a variable capacity type compressor 1 driven by an inverter device and a normal type compressor 2 driven by a commercial power source, and their discharge side pipes are joined together to form an oil separator. 6, outdoor heat exchanger 8 via four-way valve 7
The liquid tank 10 is connected to the outdoor heat exchanger 8 via a parallel circuit of the expansion valve 12 and the check valve 9 and to the one pipe 4 connected to the indoor unit Y via the dryer 11. Connected. Further, the other pipe 5 from the indoor unit Y is branched via the strainer 15, the four-way valve 7, and the accumulator 14 into the compressor 1,
2 is connected to the suction side.
【００１７】能力可変型圧縮機１の吐出側には、高圧ス
イッチ２１と温度センサ２５が設けられ、商用電源で駆
動される圧縮機２には、能力可変型圧縮機１との合流点
に逆止弁３が接続され、その逆止弁３と圧縮機２の吐出
側間に高圧スイッチ２２と温度センサ２６が設けられ
る。A high pressure switch 21 and a temperature sensor 25 are provided on the discharge side of the variable capacity compressor 1, and the compressor 2 driven by a commercial power source is reverse to the confluence point with the variable capacity compressor 1. The stop valve 3 is connected, and the high pressure switch 22 and the temperature sensor 26 are provided between the check valve 3 and the discharge side of the compressor 2.
【００１８】両圧縮機１，２の吐出側の合流点には高圧
用圧力センサ２３が設けられ、吸込側には、低圧用圧力
センサ２４と吸込温度を検出する温度センサ２７が設け
られる。A pressure sensor 23 for high pressure is provided at the confluence of the compressors 1 and 2 on the discharge side, and a pressure sensor 24 for low pressure and a temperature sensor 27 for detecting the suction temperature are provided on the suction side.
【００１９】室外熱交換器８には、その凝縮温度を検出
する温度センサ２８が設けられ、その室外熱交換器８の
室外送風機１３の外気吸込通路に位置して外気温度を検
出する温度センサ２９が設けられる。The outdoor heat exchanger 8 is provided with a temperature sensor 28 for detecting its condensing temperature. The temperature sensor 29 is located in the outdoor air intake passage of the outdoor blower 13 of the outdoor heat exchanger 8 and detects the outdoor air temperature. Is provided.
【００２０】各室内ユニットＹは、室外機Ｘからの一方
の配管４に接続される流量調整弁３２とその流量調整弁
３２に接続されると共に他方の配管５に接続される室内
熱交換器３３とその室内熱交換器３３の室内送風機３４
とからなり、その室内熱交換気３の出入口に温度センサ
３７，３８が設けられると共に圧力センサ３５，３６が
設けられる。また、室内ユニットＹには、室内温度を検
出する温度センサ３９が設けられる。Each indoor unit Y is connected to one of the pipes 4 from the outdoor unit X and an indoor heat exchanger 33 connected to the flow control valve 32 and the other pipe 5. And the indoor blower 34 of the indoor heat exchanger 33
The temperature sensors 37 and 38 are provided at the entrance and exit of the indoor heat exchange air 3, and the pressure sensors 35 and 36 are provided. Further, the indoor unit Y is provided with a temperature sensor 39 for detecting the indoor temperature.
【００２１】なお、４０はオイルセパレータ６と圧縮機
１，２の吸込側を接続した油戻し回路、４１は、膨張弁
１２とリキッドタンク１０の間と圧縮機１，２の吸込側
を結ぶレリース回路である。Reference numeral 40 denotes an oil return circuit connecting the oil separator 6 and the suction sides of the compressors 1 and 2, and 41 denotes a release connecting the expansion valve 12 and the liquid tank 10 to the suction sides of the compressors 1 and 2. Circuit.
【００２２】次に図１の冷凍サイクルの冷媒の流れを説
明する。Next, the flow of the refrigerant in the refrigeration cycle of FIG. 1 will be described.
【００２３】冷房運転時には、四方弁７は図示の実線を
結ぶポートを接続し、圧縮機１，２からの高温高圧冷媒
は図示の実線の矢印で示したように流れる。すなわち、
四方弁７を介し室外熱交換器８に流れ、そこで凝縮さ
れ、膨張弁１２と一部逆止弁９を通って減圧されてリキ
ッドタンク１０に流れ、配管４を介して室内ユニットＹ
の各熱交換器３３に流れる。この際流量調整弁３２は、
配管５から各室内ユニットＹに流れる冷媒の分配量を調
整する。During the cooling operation, the four-way valve 7 is connected to the port connecting the illustrated solid lines, and the high-temperature high-pressure refrigerant from the compressors 1 and 2 flows as indicated by the illustrated solid line arrows. That is,
It flows to the outdoor heat exchanger 8 via the four-way valve 7, is condensed there, and is decompressed through the expansion valve 12 and the partial check valve 9 to flow to the liquid tank 10, and then to the indoor unit Y via the pipe 4.
Flow into each heat exchanger 33. At this time, the flow rate adjusting valve 32 is
The distribution amount of the refrigerant flowing from the pipe 5 to each indoor unit Y is adjusted.
【００２４】室内熱交換器３３に流れた冷媒は、室内空
気との熱交換で蒸発し、その蒸発冷媒が配管５を通し四
方弁７に流れ、アキュムレータ１４を介して圧縮機１，
２の吸込側に戻る。これにより、冷却された室内空気に
より室内を冷房する。The refrigerant flowing into the indoor heat exchanger 33 is evaporated by heat exchange with the indoor air, and the evaporated refrigerant flows through the pipe 5 to the four-way valve 7 and the accumulator 14 to the compressor 1,
Return to the suction side of 2. As a result, the room is cooled by the cooled room air.
【００２５】暖房運転時には、四方弁７は切り換えら
れ、図示の点線を結ぶポートを接続し、圧縮機１，２の
高温高圧冷媒は図示の点線の矢印で示したように流れ
る。すなわち四方弁７を介し、配管５を介して室内ユニ
ットＹの各室内熱交換器３３に流れて室内空気と熱交換
して凝縮すると共に、その凝縮液が流量調整弁３２でそ
の室内熱交換器３３に流れる冷媒の分配量が調整され、
配管４を通ってリキッドタンク１１に流れ、膨張弁１２
で減圧された後、室外熱交換器８で外気と熱交換されて
蒸発し、四方弁７、アキュムレータ１４を介して圧縮機
１，２に戻る流れとなる。これにより、加熱された室内
空気により室内を暖房する。During the heating operation, the four-way valve 7 is switched, the ports connecting the dotted lines shown in the figure are connected, and the high temperature and high pressure refrigerants of the compressors 1 and 2 flow as shown by the dotted arrows in the figure. That is, through the four-way valve 7, through the pipe 5 to each indoor heat exchanger 33 of the indoor unit Y to exchange heat with the indoor air to condense, and the condensate is flowed through the flow rate adjusting valve 32 to the indoor heat exchanger. The distribution amount of the refrigerant flowing in 33 is adjusted,
It flows through the pipe 4 to the liquid tank 11, and the expansion valve 12
After being depressurized by, the heat is exchanged with the outside air in the outdoor heat exchanger 8 to evaporate, and returns to the compressors 1 and 2 via the four-way valve 7 and the accumulator 14. As a result, the room is heated by the heated indoor air.
【００２６】さて、本発明においては、冷房運転で圧縮
機１が低周波数運転しているときや、低外気温で冷房運
転しているとき、配管４，５等や停止している室内ユニ
ットＹの熱交換器３３等に油が停留したり、室外熱交換
器８内に冷媒が寝込んだりするが、これを停止している
室内ユニットＹの流量調整弁３２の開度を変更（閉状態
をやや開く）し、かつ圧縮機１の能力を高めて冷凍サイ
クル内の冷媒循環量を増やして冷凍サイクル内に寝込ん
でいる油を圧縮機１，２に戻す油回収運転を行うもので
ある。Now, in the present invention, when the compressor 1 is operating at a low frequency in the cooling operation, or when the compressor is operating in the low outside air temperature, the pipes 4, 5 etc. and the indoor unit Y which is stopped are Oil stays in the heat exchanger 33 or the like, or the refrigerant stagnates in the outdoor heat exchanger 8. However, the opening degree of the flow rate adjusting valve 32 of the indoor unit Y that stops this is changed (closed state is The oil recovery operation is performed in which the oil lying in the refrigeration cycle is returned to the compressors 1 and 2 by increasing the capacity of the compressor 1 to increase the refrigerant circulation amount in the refrigeration cycle.
【００２７】この制御装置のブロック図を図２により説
明する。A block diagram of this control device will be described with reference to FIG.
【００２８】図２において、４２は室外機Ｘに設けられ
た室外制御部、４３は室内ユニットＹに設けた室内制御
部で、これらは信号線４４により接続されている。In FIG. 2, reference numeral 42 is an outdoor control unit provided in the outdoor unit X, 43 is an indoor control unit provided in the indoor unit Y, and these are connected by a signal line 44.
【００２９】室外制御部４２には、高圧スイッチ２１，
２２，圧力センサ２３，２４の情報が入力されると共に
各温度センサ２５，２６，２７，２８，２９の温度情報
が入力される。The outdoor controller 42 includes a high-voltage switch 21,
22, the information of the pressure sensors 23 and 24 is input, and the temperature information of the temperature sensors 25, 26, 27, 28 and 29 is also input.
【００３０】この室外制御部４２は、インバータ装置４
５に運転指令周波数を出力して能力可変型圧縮機１を駆
動すると共に商用電源で駆動する圧縮機２へ通電するた
めのリレー（図示せず）を開閉動して圧縮機２をＯＮ・
ＯＦＦ制御する。また室外制御部４２は、室外送風機１
３を制御すると共に四方弁７を切り換え、さらに膨張弁
１２の弁開度を制御するようになっている。The outdoor control unit 42 is provided in the inverter device 4
The operation command frequency is output to 5 to drive the variable capacity compressor 1, and a relay (not shown) for energizing the compressor 2 driven by a commercial power source is opened and closed to turn on the compressor 2.
OFF control. Further, the outdoor control unit 42 uses the outdoor blower 1
3 is controlled, the four-way valve 7 is switched, and the valve opening degree of the expansion valve 12 is controlled.
【００３１】室内制御部４３には、圧力センサ３５，３
６，温度センサ３７，３９の検出情報が入力され、また
ワイヤレス或いはワイヤードで各種の設定運転情報がリ
モコン４６より入力される。The indoor control unit 43 includes pressure sensors 35, 3
6, the detection information of the temperature sensors 37, 39 is input, and various set operation information is input from the remote controller 46 wirelessly or by wire.
【００３２】この室内制御部４３は、流量調整弁３２の
弁開度と室内送風機３４の回転速度を制御するようにな
っている。The indoor controller 43 controls the valve opening of the flow rate adjusting valve 32 and the rotation speed of the indoor blower 34.
【００３３】次に図３により本発明の油回収制御のフロ
ーチャートを説明する。Next, a flow chart of the oil recovery control of the present invention will be described with reference to FIG.
【００３４】制御が開始５０され、冷房運転かどうかが
判断され（ｓｔｅｐ１）、冷房運転でなければ（ｎ
ｏ）、制御を終了５１し、冷房運転であれば（ｙｅ
ｓ）、Ｔ1 ，Ｔ2 ，Ｔ3 ，ｔを０にセット５２して、カ
ウントを開始し、次のｓｔｅｐ２，ｓｔｅｐ３，ｓｔｅ
ｐ４でそれぞれ判断を行う。すなわち、ｓｔｅｐ２で
は、冷房運転中かどうかを判断し、ｓｔｅｐ３では、冷
房運転中の低周波数運転を判断し、ｓｔｅｐ４では、低
外気温冷房運転を判断し、これら条件のいずれかを満た
したときに油回収制御５５を行う。The control is started 50 and it is judged whether or not the cooling operation is performed (step 1). If the cooling operation is not performed (n)
o), the control is terminated 51, and if it is the cooling operation (yes)
s), T 1 , T 2 , T 3 and t are set to 0 52 and counting is started, and the next step 2, step 3, step 3
Each judgment is made at p4. That is, in step 2, it is determined whether or not the cooling operation is being performed, in step 3, the low frequency operation during the cooling operation is determined, and in step 4, the low outside air temperature cooling operation is determined, and when any of these conditions is satisfied, The oil recovery control 55 is performed.
【００３５】先ず、ｓｔｅｐ２の判断では、冷房運転中
であれば（ｙｅｓ）、その運転積算時間Ｔ1 が所定時間
Ａ（例えば６０分）経過したかどうかを判断し（ｓｔｅ
ｐ５）、所定時間Ａ経過したならば（ｙｅｓ）、運転周
波数Ｓｘを一段乃至数段高い周波数Ｓｙに設定５３した
後、流量調整弁３２の開度Ｐｙをより開度の大きい開度
Ｐｘに設定５４して油回収制御５５を行う。First, in the determination of step 2, if the cooling operation is being performed (yes), it is determined whether or not the operation integrated time T 1 has passed a predetermined time A (for example, 60 minutes) (step).
p5) If the predetermined time A has elapsed (yes), the operating frequency Sx is set 53 to a frequency Sy higher by one step or several steps, and then the opening degree Py of the flow rate adjusting valve 32 is set to a larger opening degree Px. 54 and the oil recovery control 55 is performed.
【００３６】ｓｔｅｐ２の判断では、室温制御等で冷房
運転が行われていない場合（ｎｏ）には、その停止積算
時間Ｔ2 が所定時間Ｅ（例えば３０分）経過したかどう
かを判断し（ｓｔｅｐ６）、所定時間Ｅ経過したならば
（ｙｅｓ）、次の圧縮機の起動時に油回収制御５５を行
う。In the determination of step 2, when the cooling operation is not performed due to room temperature control or the like (no), it is determined whether or not the accumulated stop time T 2 has passed a predetermined time E (for example, 30 minutes) (step 6). ), If the predetermined time E has elapsed (yes), the oil recovery control 55 is performed at the next startup of the compressor.
【００３７】ｓｔｅｐ３の判断では、高圧圧力Ｐｄが設
定値Ｎ（例えば１２ｋｇ／ｃｍ2 ）以下の時（ｙｅ
ｓ）、その継続時間Ｔ2 が、設定した時間Ｂ（例えば３
０分）経過したどうかを判断し（ｓｔｅｐ７）、設定時
間Ｂ経過した時（ｙｅｓ）、油回収制御５５を行う。In the judgment of step 3, when the high pressure Pd is equal to or lower than the set value N (for example, 12 kg / cm 2 ) (yes).
s) and the duration T 2 thereof is the set time B (for example, 3
It is determined whether 0 minutes has elapsed (step 7), and when the set time B has elapsed (yes), the oil recovery control 55 is performed.
【００３８】ｓｔｅｐ４の判断では、外気温Ｔｏが、設
定温度ｋより低ければ（ｙｅｓ）、その継続時間Ｔ
3 が、設定した時間Ｃ（例えば３０分）経過したどうか
を判断し（ｓｔｅｐ８）、設定時間Ｃ経過した時（ｙｅ
ｓ）、油回収制御５５を行う。In step 4, if the outside air temperature To is lower than the set temperature k (yes), the duration time T thereof is T.
3 judges whether the set time C (for example, 30 minutes) has passed (step 8), and when the set time C has passed (yes)
s), the oil recovery control 55 is performed.
【００３９】この油回収制御５５の時、圧縮機の運転周
波数制御中に回収制御５５となった時には、設定５３の
周波数制御に従い、また冷房下限高圧保護制御を行わな
いように、さらにＰｄ圧力センサバックアップ中は、制
御条件「Ｐｄ＜１２」を「Ｐｄ＜３０」に変更する。ま
た、全室冷房運転（サーモＯＮ）時は、６０分毎の油回
収制御は行わないようにしてもよい、但し高圧圧力Ｐｄ
＜１２または起動時には油回収制御は行う。In the case of this oil recovery control 55, when the recovery control 55 is set during the operation frequency control of the compressor, the Pd pressure sensor is further arranged so as not to perform the cooling lower limit high pressure protection control according to the frequency control of the setting 53. During the backup, the control condition “Pd <12” is changed to “Pd <30”. Further, during all room cooling operation (thermo ON), the oil recovery control may not be performed every 60 minutes, provided that the high pressure Pd
<12 or oil recovery control is performed at startup.
【００４０】この油回収制御５５は、ｓｔｅｐ９の判断
で、時間ｔが所定時間Ｄ（例えば１分）経過したならば
（ｙｅｓ）、ｓｔｅｐ１の判断に戻す。The oil recovery control 55 returns to the determination of step 1 if the time t has passed the predetermined time D (for example, 1 minute) in the determination of step 9 (yes).
【００４１】以上説明したように、本発明によれば、冷
凍サイクルの状態及び運転時間、起動、停止時間を管理
しているので、効果的にかつ効率的に油回収を行うこと
ができるので、圧縮機にかかる負荷を低減することがで
き、信頼性の向上に貢献できる。As described above, according to the present invention, the state of the refrigeration cycle, the operating time, the start and stop times are managed, so that the oil can be recovered effectively and efficiently. The load on the compressor can be reduced, which can contribute to the improvement of reliability.
【００４２】[0042]
【発明の効果】以上要するに本発明によれば、油回収制
御に移行するタイミングが正確になり、冷凍サイクルの
信頼性が大幅に向上する。In summary, according to the present invention, the timing of shifting to the oil recovery control becomes accurate, and the reliability of the refrigeration cycle is greatly improved.
【図１】本発明における冷凍サイクルの一実施の形態を
示す図である。FIG. 1 is a diagram showing an embodiment of a refrigeration cycle according to the present invention.
【図２】本発明における油回収制御のブロック図を示す
図である。FIG. 2 is a diagram showing a block diagram of oil recovery control in the present invention.
【図３】本発明において、油回収制御のフローチャート
を示す図である。FIG. 3 is a diagram showing a flow chart of oil recovery control in the present invention.
１ 能力可変型圧縮機 ８ 室外熱交換器 ３２ 流量調整弁 ３３ 室内熱交換器 Ｘ 室外機 Ｙ 室内ユニット 1 Variable capacity compressor 8 outdoor heat exchanger 32 Flow control valve 33 Indoor heat exchanger X outdoor unit Y indoor unit
Claims (3)
波数以下での運転時間及び停止時間をカウントする手段
を備え、この検出値に基づいて各室内ユニットの流量調
整弁の開度を調整して油回収制御を行う手段を備えたマ
ルチ式空気調和機の油回収制御装置において、圧縮機の
停止時間を検出し、連続又は積算での停止時間が所定時
間以上となったとき、次の圧縮機の起動時に油回収運転
を行うことを特徴とするマルチ式空気調和機の油回収制
御装置。1. A predetermined circumference of a variable capacity compressor during cooling operation.
Means for counting operating time and stop time below wave number
And a means for controlling the oil recovery by adjusting the opening of the flow rate adjusting valve of each indoor unit based on the detected value .
In the oil recovery control device of the luti-type air conditioner,
When the stop time is detected and the stop time in continuous or total is specified
Oil recovery operation when the next compressor is started
An oil recovery control device for a multi-type air conditioner, which is characterized by performing
手段と、能力可変型圧縮機の所定周波数以下での運転時
間及び停止時間をカウントする手段とを備え、これら検
出値に基づいて各室内ユニットの流量調整弁の開度を調
整して油回収制御を行う手段を備えたマルチ式空気調和
機の油回収制御装置において、運転中の圧縮機の吐出冷
媒圧力を検出し、その圧力が設定圧力以下での連続また
は積算運転時間が所定時間以上となったとき、油回収運
転を行うことを特徴とするマルチ式空気調和機の油回収
制御装置。 2. The pressure of discharged refrigerant is detected during cooling operation.
Means and when operating variable capacity compressors below a prescribed frequency
And a means for counting the stop time,
Adjust the opening of the flow control valve of each indoor unit based on the output value.
Multi-type air conditioner equipped with means for adjusting oil recovery control
In the oil recovery controller of the compressor, the discharge cooling of the compressor during operation
The medium pressure is detected, and the pressure is continuously or
Is the oil recovery operation when the accumulated operating time exceeds the specified time.
Oil recovery of a multi-type air conditioner characterized by turning
Control device.
周波数より所定値高い周波数とすると共に、停止中の室
内ユニットの流量調整弁の開度を所定値開くようにした
請求項１又は２記載のマルチ式空気調和機の油回収制御
装置。 3. The operation frequency of the oil recovery operation is commanded.
The frequency is higher than the specified frequency by a specified value, and the room is stopped.
The opening of the flow control valve of the internal unit was opened to a specified value.
Oil recovery control of the multi-type air conditioner according to claim 1 or 2.
apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33178295A JP3418287B2 (en) | 1995-12-20 | 1995-12-20 | Oil recovery control device for multi-type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33178295A JP3418287B2 (en) | 1995-12-20 | 1995-12-20 | Oil recovery control device for multi-type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09170828A JPH09170828A (en) | 1997-06-30 |
| JP3418287B2 true JP3418287B2 (en) | 2003-06-16 |
Family
ID=18247581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33178295A Expired - Lifetime JP3418287B2 (en) | 1995-12-20 | 1995-12-20 | Oil recovery control device for multi-type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3418287B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015155775A (en) * | 2014-02-20 | 2015-08-27 | 三菱重工業株式会社 | Multi-split air conditioner |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100565038C (en) * | 2002-04-08 | 2009-12-02 | 大金工业株式会社 | Refrigerating plant |
| KR100640852B1 (en) * | 2004-12-09 | 2006-11-02 | 엘지전자 주식회사 | method for controlling multi airconditioner |
| WO2007029180A2 (en) * | 2005-09-05 | 2007-03-15 | Arcelik Anonim Sirketi | A cooling device |
| JP4764850B2 (en) * | 2007-03-30 | 2011-09-07 | ヤンマー株式会社 | Air conditioner |
| EP2495511B1 (en) * | 2009-10-27 | 2019-01-09 | Mitsubishi Electric Corporation | Air conditioning device |
| JP5484930B2 (en) * | 2010-01-25 | 2014-05-07 | 三菱重工業株式会社 | Air conditioner |
| JP2013108685A (en) * | 2011-11-22 | 2013-06-06 | Fujitsu General Ltd | Air conditioner |
| JP6590363B2 (en) * | 2015-07-08 | 2019-10-16 | サンデン・エンバイロメントプロダクツ株式会社 | Refrigeration equipment |
| JP7393671B2 (en) * | 2021-01-29 | 2023-12-07 | ダイキン工業株式会社 | Refrigeration cycle equipment |
-
1995
- 1995-12-20 JP JP33178295A patent/JP3418287B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015155775A (en) * | 2014-02-20 | 2015-08-27 | 三菱重工業株式会社 | Multi-split air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09170828A (en) | 1997-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3688268B2 (en) | Outdoor fan control system and control method for air conditioner | |
| JP3418287B2 (en) | Oil recovery control device for multi-type air conditioner | |
| KR100550566B1 (en) | A hotting drive method of heat pump multi-air conditioner | |
| JP3424868B2 (en) | Multi-system air conditioner | |
| JP2557577B2 (en) | Air conditioner | |
| US4869074A (en) | Regenerative refrigeration cycle apparatus and control method therefor | |
| JPH043865A (en) | Freezing cycle device | |
| JP2004278813A (en) | Air-conditioner and its controlling method | |
| JP3096687B2 (en) | Air conditioner | |
| JPH05346256A (en) | Method for controlling compressor of air conditioner | |
| JP3059815B2 (en) | Air conditioner | |
| JP3423031B2 (en) | Air conditioner | |
| JP3181117B2 (en) | Air conditioner | |
| JP3123873B2 (en) | Air conditioner | |
| JP3883725B2 (en) | Method of operating air conditioner and air conditioner | |
| JPH0634224A (en) | Room heater/cooler | |
| JP3237206B2 (en) | Air conditioner | |
| JP2555779B2 (en) | Operation control device for air conditioner | |
| JP3126420B2 (en) | Air conditioner | |
| JP2669069B2 (en) | Heating and cooling machine | |
| JPH02157568A (en) | Refrigerant residence suppressing device for air conditioning device | |
| JP3750496B2 (en) | Air conditioner | |
| JP4052020B2 (en) | Heat pump system | |
| JP2003294292A (en) | Air conditioner | |
| JP2002022296A (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080411 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090411 Year of fee payment: 6 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090411 Year of fee payment: 6 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090411 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100411 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110411 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110411 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130411 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130411 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140411 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |