JPH04302958A - Control method of air-conditioner - Google Patents
Control method of air-conditionerInfo
- Publication number
- JPH04302958A JPH04302958A JP3093659A JP9365991A JPH04302958A JP H04302958 A JPH04302958 A JP H04302958A JP 3093659 A JP3093659 A JP 3093659A JP 9365991 A JP9365991 A JP 9365991A JP H04302958 A JPH04302958 A JP H04302958A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- heat exchanger
- pressure side
- outdoor
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 6
- 239000003507 refrigerant Substances 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は空気調和機の制御方法に
関し、詳しくは圧縮機の再起動時に高圧側と低圧側の圧
力差を少なくして圧縮機の負荷トルクを小さくし、圧縮
機の起動を円滑かつ確実に行う制御方法に関するもので
ある。[Field of Industrial Application] The present invention relates to a control method for an air conditioner, and more specifically, when restarting the compressor, the pressure difference between the high pressure side and the low pressure side is reduced to reduce the load torque of the compressor. This invention relates to a control method for smooth and reliable startup.
【０００２】0002
【従来の技術】従来、空気調和機の冷媒回路は、圧縮機
の吐出側から四方弁、室内側熱交換器、膨張弁またはキ
ャピラリーチューブ、室外側熱交換器、四方弁に戻り、
アキュムレータを経て圧縮機の吸入側に戻る順路で連結
して構成され、暖房運転の場合は上記配列順に、冷房運
転の場合は四方弁を切換えて室外側熱交換器、膨張弁ま
たはキャピラリーチューブ、四方弁、アキュムレータを
経て圧縮機の吸入側に戻る順路を形成している。暖房運
転を例に説明すると、圧縮機の運転中は室内側熱交換器
は高圧側となり、室外側熱交換器は低圧側となる。リモ
コン装置または操作パネルからの信号、または室温セン
サからの信号により圧縮機が停止すると、冷媒が膨張弁
またはキャピラリーチューブを通して高圧側から低圧側
に流れ、徐々に高圧側圧力と低圧側圧力との差が減少し
、室外温度が比較的高い状態（２°Ｃ以上）では約３分
間経過によりほぼ差がなくなり、圧縮機が再起動可能に
なる。このように、通常３分間は再起動しないよいに圧
縮機の電流回路に３分間再起動防止タイマを設け、運転
信号が出されても圧縮機の運転を開始しないようにして
いる。しかしながら、大型の空気調和機では、室外機と
室内機の間隔が離れ、その間を３０ｍ程度の長い接続配
管でつながれる場合があり、この場合接続配管による影
響で、３分間では高圧側と低圧側の圧力差が解消しない
ことも生じている。圧力差の大きいままで圧縮機の運転
を開始すると、圧縮機の吐出側が高圧となり、圧縮機の
負荷が増大して起動トルクを上回り、圧縮機がロック状
態になる場合が生じる。この状態が続くと、圧縮機に設
けたＯＣＲ（過電流リレー）が動作し、さらにＯＣＲが
焼付いて、圧縮機モータにロック電流が流れ、モータ巻
線を焼損する状態の事故に進行する恐れが生じている。
このような問題を避けるために、図５に示すように圧縮
機停止後一定時間再起動を禁止する再起動防止タイマ（
３分遅延タイマ）が設けられている。再起動防止タイマ
は通常所定時間（例えば３分間）に設定され、圧縮機１
の停止と同時にスタートし、動作中２分間経過後に四方
弁を一定時間（５０秒）に切換えて、高圧側の冷媒を低
圧側に流して圧力差を少なくし、タイムアップ後に圧縮
機の再起動可能状態にする方法により圧縮機の再起動を
円滑且つ確実に行えるようにしている。しかしながら、
図４に示すように、圧縮機の停止に合わせて室外側送風
機も停止し、室外側熱交換器の熱交換能力が低下するた
め、低圧側の圧力上昇が遅れ、長い接続配管でつながれ
た大型空気調和機の場合には、３分間程度の再起動防止
時間では高圧側と低圧側の圧力差が高い状態で残り、四
方弁の切換え時冷媒ガスが高圧側から低圧側に流れる際
にかなり大きな冷媒音を生じ、しかも圧縮機が停止した
静音状態で発生するために利用者に心理的不快感を与え
ていた。Conventionally, the refrigerant circuit of an air conditioner returns from the discharge side of the compressor to a four-way valve, an indoor heat exchanger, an expansion valve or a capillary tube, an outdoor heat exchanger, a four-way valve,
They are connected in the order shown above, passing through the accumulator and returning to the suction side of the compressor.In heating operation, the four-way valve is switched, and in the case of cooling operation, the outdoor heat exchanger, expansion valve or capillary tube, and the four-way It forms a route that passes through the valve and accumulator and returns to the suction side of the compressor. Taking heating operation as an example, the indoor heat exchanger is on the high pressure side and the outdoor heat exchanger is on the low pressure side while the compressor is operating. When the compressor is stopped by a signal from the remote control device, operation panel, or room temperature sensor, the refrigerant flows from the high pressure side to the low pressure side through the expansion valve or capillary tube, and the difference between the high pressure side and low pressure side gradually increases. decreases, and when the outdoor temperature is relatively high (2°C or higher), the difference disappears after about 3 minutes, and the compressor can be restarted. In this way, the compressor normally does not restart for 3 minutes, and a 3-minute restart prevention timer is provided in the current circuit of the compressor to prevent the compressor from starting operation even if an operation signal is issued. However, in large air conditioners, the distance between the outdoor unit and indoor unit may be far apart, and they may be connected by a long connecting pipe of about 30 meters.In this case, due to the influence of the connecting pipe, the high pressure side and low pressure In some cases, the pressure difference is not resolved. If the compressor starts operating with a large pressure difference, the pressure on the discharge side of the compressor becomes high, the load on the compressor increases and exceeds the starting torque, and the compressor may become locked. If this condition continues, the OCR (overcurrent relay) installed in the compressor will operate, and the OCR will seize up, causing a lock current to flow to the compressor motor, which could lead to an accident that could burn out the motor windings. It is occurring. In order to avoid such problems, as shown in Figure 5, a restart prevention timer (
A 3-minute delay timer) is provided. The restart prevention timer is usually set to a predetermined period of time (for example, 3 minutes), and
It starts at the same time as the compressor stops, and after 2 minutes of operation, the four-way valve is switched for a certain period of time (50 seconds), the refrigerant on the high pressure side flows to the low pressure side to reduce the pressure difference, and after the time is up, the compressor is restarted. The method of enabling the compressor enables smooth and reliable restart of the compressor. however,
As shown in Figure 4, when the compressor stops, the outdoor blower also stops, and the heat exchange capacity of the outdoor heat exchanger decreases, causing a delay in the rise in pressure on the low pressure side. In the case of air conditioners, the pressure difference between the high pressure side and the low pressure side remains high during the restart prevention time of about 3 minutes, and when the four-way valve is switched, the refrigerant gas flows from the high pressure side to the low pressure side. The refrigerant noise is generated even when the compressor is stopped and the noise is silent, causing psychological discomfort to users.
【０００３】0003
【発明が解決しようとする課題】本発明は、上記従来の
問題点に鑑みなされたもので、圧縮機の停止後一定時間
、室外側送風機を運転し、再起動防止タイマタイムアッ
プ後の高圧側と低圧側の圧力差を少なくし、冷媒音を出
来るだけ小さくする空気調和機の制御方法を提供しよう
とすることを目的としている。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to operate the outdoor side blower for a certain period of time after the compressor has stopped, and to The purpose of this invention is to provide a control method for an air conditioner that reduces the pressure difference between the low pressure side and the low pressure side, and reduces refrigerant noise as much as possible.
【０００４】0004
【課題を解決するための手段】上記目的を達成するため
に、圧縮機の運転停止後一定時間前記室外側熱交換器用
送風機を継続運転し、再起動防止タイマのタイムアップ
後の高圧側と低圧側の圧力差を少なくするようにした。[Means for Solving the Problems] In order to achieve the above object, the outdoor heat exchanger blower is continuously operated for a certain period of time after the compressor has stopped operating, and the high pressure side and low pressure side after the restart prevention timer times out. I tried to reduce the pressure difference between the sides.
【０００５】[0005]
【作用】上記の構成によれば、圧縮機の停止後一定時間
、室外側送風機を継続運転することにより、室外側熱交
換器の熱交換能力を保持し、低圧側の圧力上昇を促進す
ることにより、高圧側と低圧側の圧力差を狭めることが
でき、圧縮機の再起動を円滑かつ確実に行えるとともに
、四方弁の切換え時の冷媒音を小さくする事ができる。[Operation] According to the above configuration, by continuing to operate the outdoor blower for a certain period of time after the compressor is stopped, the heat exchange capacity of the outdoor heat exchanger is maintained and the pressure increase on the low pressure side is promoted. As a result, the pressure difference between the high pressure side and the low pressure side can be narrowed, the compressor can be restarted smoothly and reliably, and the refrigerant noise when switching the four-way valve can be reduced.
【０００６】[0006]
【実施例】本発明の実施例を添付図面を参照して詳細に
説明する。図１は本発明の冷媒回路図で、図中矢印は暖
房運転時の冷媒の流れを示し、圧縮機１により高圧高温
に圧縮された冷媒ガスは、暖房に切換えられた四方弁２
を通り室内側熱交換器３に送られ、室内空気と熱交換し
て冷却され液化し、減圧器（膨張弁４）により断熱膨張
して室外側熱交換器５に入り、室外空気より熱を奪って
気化し、四方弁２とアキュウムレータ６を通り圧縮機１
の吸入側に戻る経路を形成している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a refrigerant circuit diagram of the present invention, and the arrows in the figure indicate the flow of refrigerant during heating operation.
is sent to the indoor heat exchanger 3, where it exchanges heat with indoor air, is cooled and liquefied, is adiabatically expanded by a pressure reducer (expansion valve 4), enters the outdoor heat exchanger 5, and transfers heat from the outdoor air. It is taken away and vaporized, passing through the four-way valve 2 and accumulator 6 to the compressor 1.
It forms a path back to the suction side.
【０００７】図２は本発明の構成を示すブロック図で、
制御部７にはリモコンまたは操作パネルからの信号によ
り室内温度の設定、切り入りタイマの時間設定や室内側
送風機の風量設定等の設定条件が入力されてメモリ８に
記憶され、室温センサ９からのサーモ信号により検出さ
れた室内温度が設定値と比較され、圧縮機制御回路１０
により圧縮機１の運転を制御している。また、制御部７
には四方弁２の切換えを制御する四方弁制御回路１１と
、圧縮機１の停止と同時にスタートしその間圧縮機１の
再起動を禁止する再起動防止タイマ１２と、室外温度を
検出する室外温度センサ１３と、室外側送風機１４が設
けられている。FIG. 2 is a block diagram showing the configuration of the present invention.
Setting conditions such as indoor temperature setting, cut-off timer time setting, and indoor blower air volume setting are input to the control unit 7 by signals from the remote control or the operation panel, and are stored in the memory 8. The room temperature detected by the thermo signal is compared with a set value, and the compressor control circuit 10
The operation of the compressor 1 is controlled by. In addition, the control unit 7
includes a four-way valve control circuit 11 that controls switching of the four-way valve 2, a restart prevention timer 12 that starts at the same time as the compressor 1 stops and prohibits restarting the compressor 1 during that time, and an outdoor temperature control circuit that detects the outdoor temperature. A sensor 13 and an outdoor fan 14 are provided.
【０００８】図３は本発明の圧縮機１と室外側送風機１
４の運転状態を示すタイムチャートで、圧縮機１の停止
後一定時間（３分間）室外側送風機１４を継続運転して
いる状態を示している。圧縮機１の停止により、室内側
熱交換器３は高圧状態に、室外側熱交換器５は低圧状態
に置かれ、冷媒ガスは膨張弁４（またはキャピラリーチ
ュウブ）を通して徐々に高圧側から低圧側に流れ、圧力
差を小さくしていく。この時、室外側送風機１４が再起
動防止タイマ作動中の一定時間継続して運転していると
、室外側熱交換器５は室外空気と熱交換を行い低圧側の
圧力上昇を促進し一定水準まで引き上げ、圧力差を減少
することができ、再起動防止タイマのタイムアップ後、
圧縮機の再起動を円滑且つ確実に行うことができる。FIG. 3 shows a compressor 1 and an outdoor blower 1 according to the present invention.
This is a time chart showing the operating state of No. 4, which shows a state in which the outdoor blower 14 is continuously operated for a certain period of time (3 minutes) after the compressor 1 is stopped. By stopping the compressor 1, the indoor heat exchanger 3 is placed in a high pressure state and the outdoor heat exchanger 5 is placed in a low pressure state, and the refrigerant gas is gradually transferred from the high pressure side to the low pressure side through the expansion valve 4 (or capillary tube). flow, reducing the pressure difference. At this time, if the outdoor fan 14 continues to operate for a certain period of time while the restart prevention timer is activated, the outdoor heat exchanger 5 exchanges heat with the outdoor air to promote pressure rise on the low pressure side to a certain level. After the restart prevention timer times out, the pressure difference can be reduced.
The compressor can be restarted smoothly and reliably.
【０００９】[0009]
【発明の効果】以上のように本発明においては、圧縮機
の停止後一定時間室外側送風機を継続運転することによ
り、室外側熱交換器の熱交換能力を保持し、冷媒回路の
高圧側と低圧側の圧力差を少なくし、再起動防止タイマ
のタイムアップ後、圧縮機の再起動を円滑且つ確実に行
うことができる。As described above, in the present invention, by continuously operating the outdoor fan for a certain period of time after the compressor is stopped, the heat exchange capacity of the outdoor heat exchanger is maintained, and the high pressure side of the refrigerant circuit is maintained. By reducing the pressure difference on the low pressure side, the compressor can be restarted smoothly and reliably after the restart prevention timer times out.
【図１】本発明の冷媒回路図である。FIG. 1 is a refrigerant circuit diagram of the present invention.
【図２】本発明の構成を示すブロック図である。FIG. 2 is a block diagram showing the configuration of the present invention.
【図３】本発明の圧縮機と室外側送風機の運転状態を示
すタイムチャートである。FIG. 3 is a time chart showing the operating states of the compressor and outdoor blower of the present invention.
【図４】従来の信号タイムチャートである。FIG. 4 is a conventional signal time chart.
１ 圧縮機 ２ 四方弁 ３ 室内側熱交換器 ４ 膨張弁 ５ 室外側熱交換器 ６ アキュウムレータ ７ 制御部 ８ メモリ ９ 室温センサ １０ 圧縮機制御回路 １１ 四方弁制御回路 １２ 再起動防止タイマ １３ 室外温度センサ １４ 室外側送風機 1 Compressor 2 Four-way valve 3 Indoor heat exchanger 4 Expansion valve 5 Outdoor heat exchanger 6 Accumulator 7 Control section 8 Memory 9 Room temperature sensor 10 Compressor control circuit 11 Four-way valve control circuit 12 Restart prevention timer 13 Outdoor temperature sensor 14 Outdoor blower
Claims (1)
圧器、室外側熱交換器、アキュウムレータを順次接続し
た冷媒回路を具え、前記圧縮機の運転停止後一定時間再
起動を禁止する再起動防止タイマと室温を検出する室温
センサからのサーモ信号により予じめ設定された制御条
件に従い前記圧縮機の運転を制御する制御部を具えたヒ
ートポンプ式空気調和機において、上記圧縮機の運転停
止後一定時間前記室外側熱交換器用送風機を継続運転し
、再起動防止タイマのタイムアップ後の高圧側と低圧側
の圧力差を少なくするようにしてなることを特徴とする
空気調和機の制御方法。Claim 1: A refrigerant circuit comprising a compressor, a four-way valve, an indoor heat exchanger, a pressure reducer, an outdoor heat exchanger, and an accumulator connected in sequence, the compressor being restarted for a certain period of time after the compressor is stopped. In the heat pump air conditioner, the heat pump air conditioner is equipped with a control unit that controls the operation of the compressor according to control conditions set in advance based on a restart prevention timer that prohibits the restart and a thermo signal from a room temperature sensor that detects room temperature. The air conditioner continues to operate the outdoor heat exchanger blower for a certain period of time after the operation of the air conditioner stops, thereby reducing the pressure difference between the high pressure side and the low pressure side after a restart prevention timer times out. control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093659A JPH04302958A (en) | 1991-03-29 | 1991-03-29 | Control method of air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093659A JPH04302958A (en) | 1991-03-29 | 1991-03-29 | Control method of air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04302958A true JPH04302958A (en) | 1992-10-26 |
Family
ID=14088522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3093659A Pending JPH04302958A (en) | 1991-03-29 | 1991-03-29 | Control method of air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04302958A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019344A (en) * | 1996-06-28 | 1998-01-23 | Daikin Ind Ltd | Air conditioner |
| WO2018199167A1 (en) * | 2017-04-27 | 2018-11-01 | 三菱電機株式会社 | Air conditioning device, control device, air conditioning method, and program |
-
1991
- 1991-03-29 JP JP3093659A patent/JPH04302958A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019344A (en) * | 1996-06-28 | 1998-01-23 | Daikin Ind Ltd | Air conditioner |
| WO2018199167A1 (en) * | 2017-04-27 | 2018-11-01 | 三菱電機株式会社 | Air conditioning device, control device, air conditioning method, and program |
| JPWO2018199167A1 (en) * | 2017-04-27 | 2019-11-07 | 三菱電機株式会社 | Air conditioning apparatus, control apparatus, air conditioning method and program |
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