JPH04190062A - Freezing-cycle control device for air-conditioner - Google Patents
Freezing-cycle control device for air-conditionerInfo
- Publication number
- JPH04190062A JPH04190062A JP32144290A JP32144290A JPH04190062A JP H04190062 A JPH04190062 A JP H04190062A JP 32144290 A JP32144290 A JP 32144290A JP 32144290 A JP32144290 A JP 32144290A JP H04190062 A JPH04190062 A JP H04190062A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchanger
- compressor
- outdoor heat
- discharge
- 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
- 238000005057 refrigeration Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000001704 evaporation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、空調機の冷凍サイクルから冷媒がリークした
時に圧縮機を停止する制御装置に係り、特にサイクルの
過負荷と区別してガスリークを正確に判定する空調機の
冷凍サイクル制御装置に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a control device that stops a compressor when refrigerant leaks from the refrigeration cycle of an air conditioner, and particularly relates to a control device that stops a compressor when refrigerant leaks from the refrigeration cycle of an air conditioner. The present invention relates to a refrigeration cycle control device for an air conditioner that distinguishes and accurately determines gas leaks.
（従来の技術）
従来、空調機の冷凍サイクルは、圧縮機、四方弁、室外
熱交換器、減圧装置、室内熱交換器を順次接続して構成
され、冷房時には、圧縮機からの高温高圧冷媒ガスを室
外熱交換器に流してａｍさせ、減圧装置を介して室内熱
交換器に供給し、そこで冷媒を蒸発させて室内冷房を行
い、また、暖房時には、圧ａｍからの高温高圧冷媒ガス
を室内熱交換器に供給し、そこで凝縮させて暖房を行っ
た後、凝縮液を減圧装置を介して室外熱交換器に供給し
、そこで冷媒を蒸発させて圧縮機に戻さ 。(Prior art) Conventionally, the refrigeration cycle of an air conditioner is configured by sequentially connecting a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducing device, and an indoor heat exchanger. Gas is passed through an outdoor heat exchanger to am, and then supplied to an indoor heat exchanger via a pressure reducing device, where the refrigerant is evaporated to cool the room.In addition, during heating, high-temperature, high-pressure refrigerant gas from am is supplied to the indoor heat exchanger through a pressure reducing device. After being supplied to an indoor heat exchanger and condensed there for heating, the condensate is supplied to an outdoor heat exchanger via a pressure reducing device, where the refrigerant is evaporated and returned to the compressor.
れるようになっている。It is now possible to
ところで、この冷凍サイクル内に封入される冷媒がリー
クしてその冷媒循環量が少なくなると、サイクル内の負
荷が大きくなり圧縮機の吐出温度が異常に上昇してしま
うため、圧縮機の吐出側に吐出温度センサを設け、この
吐出温度ｔｄが所定温度Ｔｄを越えるとガスリークと判
定して圧ｓｍの運転を停止している。すなわち第３図に
示すよう、運転が開始されると、吐出温度ｔｄが所定温
度Ｔｄを越えたか（ｔｄ＞Ｔｄ）かどうかを判断し、越
えたとき（ＹＥＳ）圧縮機を停止している。By the way, if the refrigerant sealed in this refrigeration cycle leaks and the amount of refrigerant circulating decreases, the load in the cycle will increase and the discharge temperature of the compressor will rise abnormally. A discharge temperature sensor is provided, and when the discharge temperature td exceeds a predetermined temperature Td, it is determined that there is a gas leak and the operation of the pressure sm is stopped. That is, as shown in FIG. 3, when the operation is started, it is determined whether the discharge temperature td exceeds a predetermined temperature Td (td>Td), and if the discharge temperature td exceeds the predetermined temperature Td (td>Td), the compressor is stopped.
（発明が解決しようとする課題）
しかしながら、サイクル内のガス循環量が正常でも空調
負荷が大きく、圧縮機が過負荷になっている場合でも吐
出温度ｔｄが高くなり、所定温度を越えてしまうことが
あり、この場合にサイクルが正常でもガスリークと誤判
定し、圧ａｍを停止してしまう問題がある。(Problem to be solved by the invention) However, even if the gas circulation amount in the cycle is normal, the air conditioning load is large and the compressor is overloaded, the discharge temperature td becomes high and exceeds the predetermined temperature. In this case, even if the cycle is normal, it may be mistakenly determined to be a gas leak and the pressure am may be stopped.
本発明は上記事情を考慮してなされたもので、ガスリー
クを正確に判定できる空調機の冷凍サイクル制御装置を
提供することを目的とする。The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a refrigeration cycle control device for an air conditioner that can accurately determine gas leaks.
［発明の構成コ
（課題を解決するための手段）
本発明は、上記の目的を達成するために、圧縮機、室内
外熱交換器、減圧装置などからなる空調機の冷凍サイク
ル制御装置において、圧ｍｓａの吐出温度を検出する吐
出温度センサと、室外熱交換器の温度を検出する室外熱
交温度センサと、吐出温度センサの吐出温度ｔｄと室外
熱交温度センサの熱交温度ｔｅが入力され、吐出温度ｔ
ｄが所定温度Ｔｄを越えかつ熱交温度ｔｅが設定温度Ｔ
ｅ未溝の時にガスリークとして圧Ｓｔａを停止する制御
部とを備えたものである。[Structure of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention provides a refrigeration cycle control device for an air conditioner comprising a compressor, an indoor/outdoor heat exchanger, a pressure reducing device, etc. A discharge temperature sensor that detects the discharge temperature of the pressure msa, an outdoor heat exchanger temperature sensor that detects the temperature of the outdoor heat exchanger, a discharge temperature td of the discharge temperature sensor, and a heat exchanger temperature te of the outdoor heat exchanger temperature sensor are input. , discharge temperature t
d exceeds the predetermined temperature Td and the heat exchanger temperature te exceeds the set temperature T
(e) A control section that stops the pressure Sta as a gas leak when there is no groove.
（作 用）
上記の構成によれば、制御部が、ガスリークの判断にお
いて、圧縮機の吐出温度ｔｄの他に熱交温度ｔｅも合わ
せてみることで、ガスリークと過負荷とを区別できガス
リークを正確に判断できる。すなわち過負荷の際には吐
出温度ｔｄが所定温度Ｔｄを越えても、冷媒量は充分あ
り、その熱交換温度ｔｅは設定温度Ｔｅ未満になること
はないため、ガスリークと区別できる。(Function) According to the above configuration, when determining a gas leak, the control unit can distinguish between a gas leak and an overload by considering the heat exchanger temperature te in addition to the discharge temperature td of the compressor. Can judge accurately. In other words, even if the discharge temperature td exceeds the predetermined temperature Td during overload, there is a sufficient amount of refrigerant and the heat exchange temperature te will never fall below the set temperature Te, so it can be distinguished from a gas leak.
（実施例）
以下、本発明の好適実施例を添付図面に基づいて説明す
る。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.
第１図において、圧縮機１、四方弁２、室外熱交換器３
、減圧装置４、室内熱交換Ｈ５が順次＃続されて冷凍サ
イクルが構成される。冷房時には、冷媒は図示の実線の
矢印のように、すなわち圧縮機１からの高温高圧冷媒ガ
スが四方弁２を通して室外熱交換器３に流れ、そこでＩ
［Ｌ、減圧装置４を介して室内熱交換器５に供給し、そ
こで冷媒が蒸発されて室内冷房が行われ、その蒸発ガス
が四方弁２を介して圧縮ＩＩに戻る。In Fig. 1, a compressor 1, a four-way valve 2, an outdoor heat exchanger 3
, the pressure reducing device 4, and the indoor heat exchanger H5 are successively connected to form a refrigeration cycle. During cooling, the refrigerant flows as shown by the solid arrow in the figure, that is, high-temperature, high-pressure refrigerant gas from the compressor 1 flows through the four-way valve 2 to the outdoor heat exchanger 3, where the I
[L, the refrigerant is supplied to the indoor heat exchanger 5 via the pressure reducing device 4, where the refrigerant is evaporated to cool the room, and the evaporated gas is returned to the compression II via the four-way valve 2.
また、暖房時には、四方弁２が切り換えられ、冷媒は図
示の点線の矢印のように、圧５ｅｌｉからの高温高圧冷
媒ガスが室内熱交換器５に供給され、そこで凝縮されて
暖房を行い、Ｍｔａ液は減圧装置４を介して室外熱交換
器３に供給され、そこで蒸発されて圧縮機１に戻される
。In addition, during heating, the four-way valve 2 is switched, and the refrigerant is supplied with high temperature and high pressure refrigerant gas from the pressure 5eli to the indoor heat exchanger 5, where it is condensed and heated, as shown by the dotted line arrow in the figure. The liquid is supplied to the outdoor heat exchanger 3 via the pressure reduction device 4, where it is evaporated and returned to the compressor 1.
さて圧ｍｌ！Ｉｌｌの吐出側には吐出温度センサ７が設
けられ、室外熱交換器３の冷房時の出口側（暖房時入口
側）には室外熱交温度センサ８が設けられ、これらセン
サ７．８の検出値が室外の制御部６に入力される。まな
この制ｆＩ１部６は室内表示部９と接続される。Now pressure ml! A discharge temperature sensor 7 is provided on the discharge side of the Ill, and an outdoor heat exchanger temperature sensor 8 is provided on the outlet side of the outdoor heat exchanger 3 during cooling (inlet side during heating). The value is input to the outdoor control unit 6. Manako's control fI1 section 6 is connected to an indoor display section 9.
制御部６は、吐出温度センサ７の吐出温度ｔｄと所定温
度Ｔｄとを比較すると共に室外熱交温度センサ８の熱交
温度ｔｅと設定温度Ｔｅとを比較し、吐出温度ｔｄが所
定温度Ｔｄを越えかつ熱交温度ｔｅが設定温度Ｔｅ未満
の時にガスリークとして圧ｍ１ｌｌを停止すべく開閉器
をＯＦＦにすると共に室内表示部９にガスリークである
ことを表示する。The control unit 6 compares the discharge temperature td of the discharge temperature sensor 7 with a predetermined temperature Td, and also compares the heat exchanger temperature te of the outdoor heat exchanger temperature sensor 8 with a set temperature Te, so that the discharge temperature td is higher than the predetermined temperature Td. When the temperature is exceeded and the heat exchanger temperature te is less than the set temperature Te, the switch is turned off to stop the pressure m1ll as a gas leak, and the indoor display section 9 indicates that there is a gas leak.
また制御部は、設定温度Ｔｅが冷房時と暖房時ではその
温度が相違するため、冷房運転か暖房運転かを判断し、
それに応じて設定温度を設定する。In addition, since the set temperature Te is different during cooling and heating, the control unit determines whether to perform cooling operation or heating operation,
Set the temperature setting accordingly.
ガスリークの場合、サイクル内の冷ａ循環量が少なく、
圧縮ａｔの吐出温度が高くても、冷房時に室外熱交換器
３に流入して凝縮されるとその温度は低下し、設定温度
Ｔｅ１未満となるが、過負荷の場合には、ガス循環量が
多いため、その凝縮温度は設定温度Ｔｅ１未満となるこ
とはないため、ガスリークと過負荷とを判定できる。ま
た暖房時も同様、室外熱交換器３の入口温度は設定温度
Ｔｅ２未満の蒸発温度となるが、過負荷の場合には設定
温度Ｔｅ２以下の蒸発温度となることはないのでガスリ
ークと区別できる。In the case of a gas leak, the amount of cold a circulating in the cycle is low,
Even if the discharge temperature of the compression AT is high, if it flows into the outdoor heat exchanger 3 during cooling and is condensed, the temperature will drop and become less than the set temperature Te1, but in the case of overload, the gas circulation amount will decrease. Since the condensation temperature never becomes lower than the set temperature Te1, it is possible to determine whether there is a gas leak or an overload. Similarly, during heating, the inlet temperature of the outdoor heat exchanger 3 becomes an evaporation temperature lower than the set temperature Te2, but in the case of overload, the evaporation temperature never becomes lower than the set temperature Te2, so it can be distinguished from a gas leak.
次にこの制御部６のフローチャートを説明する。Next, a flowchart of this control section 6 will be explained.
運転がスタートされると、吐出温度ｔｄが所定温度Ｔｄ
を越えたか（ｔｄ＞Ｔｄ）かどうかを判断１０し、越え
たとき（ＹＥＳ）、次に冷房か暖房かを判断１１する。When the operation is started, the discharge temperature td reaches the predetermined temperature Td.
It is determined (10) whether or not the temperature exceeds Td (td>Td), and if it is exceeded (YES), then it is determined (11) whether it is cooling or heating.
冷房の場合、熱交温度ｔｅが、予め設定した凝縮温度で
ある設定温度Ｔ ｅ １未満かどうか（ｔｅ＜Ｔｅ１）
を判断１２し、未満であれば（ＹＥＳ）圧縮機を停止１
３し、ｔｅ＞Ｔｅｌ （Ｎｏ）であれば、過負荷運転
であるとして最初の判断１０に戻す、また暖房の場合、
熱交温度ｔｅが予め設定した蒸発温度である設定温度Ｔ
ｅ ２未満かどうか（ｔｅ＜Ｔｅ２）を判断１４し、
未満であれば（ＹＥＳ）圧ｓＩ！を停止１３し、ｔｅ＞
Ｔｅ２ （Ｎｏ）であれば、過負荷運転であるとして
最初の判断１０に戻す。In the case of air conditioning, whether the heat exchanger temperature te is less than the preset temperature T e 1, which is the preset condensation temperature (te<Te1)
12, and if it is less than (YES), stop the compressor 1
3. If te>Tel (No), it is considered overload operation and returns to the initial judgment 10. Also, in the case of heating,
A set temperature T where the heat exchanger temperature te is a preset evaporation temperature
Determine whether e is less than 2 (te<Te2) 14,
If it is less than (YES) pressure sI! Stop 13 and te>
If Te2 (No), it is determined that the operation is overloaded and the process returns to the initial determination 10.
［発明の効果コ
以上説明したことから明らかなように本発明によればガ
スリークの判定を、吐出温度ｔｄと熱交温度ｔｅの両方
で行うことで、誤判定のない正確な判定ができる。[Effects of the Invention] As is clear from the above description, according to the present invention, by determining gas leakage using both the discharge temperature td and the heat exchanger temperature te, accurate determination without misjudgment can be made.
第１図は本発明の一実施例を示す図、第２図は本発明に
おける制御部のフローチャートを示す図、第３図は従来
の制御のフローチトを示す図である。
図中、１は圧縮機、３は室外熱交換器、４は減圧装置、
５は室内熱交換器、６は制御部、７は吐出温度センサ、
８は室外熱交温度センサである。FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a flowchart of a control section in the present invention, and FIG. 3 is a diagram showing a conventional control flowchart. In the figure, 1 is a compressor, 3 is an outdoor heat exchanger, 4 is a pressure reduction device,
5 is an indoor heat exchanger, 6 is a control unit, 7 is a discharge temperature sensor,
8 is an outdoor heat exchanger temperature sensor.
Claims (1)
調機の冷凍サイクル制御装置において、圧縮機の吐出温
度を検出する吐出温度センサと、室外熱交換器の温度を
検出する室外熱交換器温度センサと、吐出温度センサの
吐出温度ｔｄと室外熱交換器温度センサの熱交温度ｔｅ
が入力され、吐出温度ｔｄが設定温度を越えかつ熱交温
度ｔｅが所定温度未満の時にガスリークとして圧縮機を
停止する制御部とを備えたことを特徴とする空調機の冷
凍サイクル制御装置。1. In a refrigeration cycle control device for an air conditioner consisting of a compressor, an indoor/outdoor heat exchanger, a pressure reducer, etc., there is a discharge temperature sensor that detects the discharge temperature of the compressor, and an outdoor heat exchanger temperature that detects the temperature of the outdoor heat exchanger. sensor, the discharge temperature td of the discharge temperature sensor, and the heat exchange temperature te of the outdoor heat exchanger temperature sensor.
A refrigeration cycle control device for an air conditioner, comprising: a control unit that stops a compressor as a gas leak when a discharge temperature td exceeds a set temperature and a heat exchanger temperature te is less than a predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32144290A JPH04190062A (en) | 1990-11-26 | 1990-11-26 | Freezing-cycle control device for air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32144290A JPH04190062A (en) | 1990-11-26 | 1990-11-26 | Freezing-cycle control device for air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04190062A true JPH04190062A (en) | 1992-07-08 |
Family
ID=18132606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32144290A Pending JPH04190062A (en) | 1990-11-26 | 1990-11-26 | Freezing-cycle control device for air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04190062A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074796A (en) * | 1993-06-18 | 1995-01-10 | Mitsubishi Electric Corp | Air-conditioning equipment |
| US7419192B2 (en) | 2005-07-13 | 2008-09-02 | Carrier Corporation | Braze-free connector utilizing a sealant coated ferrule |
| US7472557B2 (en) | 2004-12-27 | 2009-01-06 | Carrier Corporation | Automatic refrigerant charging apparatus |
| US7552596B2 (en) | 2004-12-27 | 2009-06-30 | Carrier Corporation | Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication |
| US7610765B2 (en) | 2004-12-27 | 2009-11-03 | Carrier Corporation | Refrigerant charge status indication method and device |
| US7712319B2 (en) | 2004-12-27 | 2010-05-11 | Carrier Corporation | Refrigerant charge adequacy gauge |
| CN106196428A (en) * | 2016-07-01 | 2016-12-07 | 美的集团武汉制冷设备有限公司 | Air-conditioner and anti-freeze control method thereof |
| US9759465B2 (en) | 2011-12-27 | 2017-09-12 | Carrier Corporation | Air conditioner self-charging and charge monitoring system |
-
1990
- 1990-11-26 JP JP32144290A patent/JPH04190062A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074796A (en) * | 1993-06-18 | 1995-01-10 | Mitsubishi Electric Corp | Air-conditioning equipment |
| US7472557B2 (en) | 2004-12-27 | 2009-01-06 | Carrier Corporation | Automatic refrigerant charging apparatus |
| US7552596B2 (en) | 2004-12-27 | 2009-06-30 | Carrier Corporation | Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication |
| US7610765B2 (en) | 2004-12-27 | 2009-11-03 | Carrier Corporation | Refrigerant charge status indication method and device |
| US7712319B2 (en) | 2004-12-27 | 2010-05-11 | Carrier Corporation | Refrigerant charge adequacy gauge |
| US7419192B2 (en) | 2005-07-13 | 2008-09-02 | Carrier Corporation | Braze-free connector utilizing a sealant coated ferrule |
| US9759465B2 (en) | 2011-12-27 | 2017-09-12 | Carrier Corporation | Air conditioner self-charging and charge monitoring system |
| CN106196428A (en) * | 2016-07-01 | 2016-12-07 | 美的集团武汉制冷设备有限公司 | Air-conditioner and anti-freeze control method thereof |
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