JP2006183907A - Air conditioner - Google Patents
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- JP2006183907A JP2006183907A JP2004376059A JP2004376059A JP2006183907A JP 2006183907 A JP2006183907 A JP 2006183907A JP 2004376059 A JP2004376059 A JP 2004376059A JP 2004376059 A JP2004376059 A JP 2004376059A JP 2006183907 A JP2006183907 A JP 2006183907A
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Abstract
Description
本発明は、外気温度を予測して運転制御を行う空気調和機に関するものである。 The present invention relates to an air conditioner that performs operation control by predicting outside air temperature.
従来、この種の空気調和機は室外熱交温度センサによる室外熱交換器温度から外気温度を推定して運転制御を行っている（例えば、特許文献１参照）。 Conventionally, this type of air conditioner performs operation control by estimating the outdoor air temperature from the outdoor heat exchanger temperature by the outdoor heat exchanger temperature sensor (see, for example, Patent Document 1).
図６は、特許文献１に記載された従来の空気調和機の室外熱交換器温度と運転停止からの経過時間との相関図を示すものである。
しかしながら、前記従来の方法では、運転停止から室外熱交換器温度が外気温度に近づくまでに長時間必要とするので、前の運転時の外気温度をそのまま流用しており、外気温度が変化しても外気温度を再推定して更新することができないという課題を有していた。 However, since the conventional method requires a long time from when the operation is stopped until the outdoor heat exchanger temperature approaches the outside air temperature, the outside air temperature during the previous operation is used as it is, and the outside air temperature changes. However, there was a problem that the outside temperature could not be reestimated and updated.
本発明は、前記従来の課題を解決するもので、外気温度センサを使用せずに、圧縮機起動の際には毎回外気温度を更新することを可能とした空気調和機を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an air conditioner that can update the outside air temperature every time the compressor is started without using an outside air temperature sensor. And
前記従来の課題を解決するために、本発明の空気調和機は、圧縮機起動前、または、圧縮機停止後に室外ファンを所定時間運転して外気を筐体内の室外熱交換器に送り込み、室外熱交換器温度を外気温度に近づけてから、圧縮機起動時の室外熱交換器温度を外気温度として更新するものである。 In order to solve the above-described conventional problems, the air conditioner of the present invention operates the outdoor fan for a predetermined time before starting the compressor or after stopping the compressor, and sends outside air to the outdoor heat exchanger in the casing. After the heat exchanger temperature is brought close to the outside air temperature, the outdoor heat exchanger temperature at the time of starting the compressor is updated as the outside air temperature.
これによって、短時間で室外熱交換器温度と外気温度を近づけることができ、圧縮機起動の際には毎回外気温度を更新することが可能となる。 As a result, the outdoor heat exchanger temperature and the outside air temperature can be brought close to each other in a short time, and the outside air temperature can be updated every time the compressor is started.
本発明の空気調和機は、外気温度センサを使用せずに外気温度を推定し、圧縮機起動の際には毎回外気温度を更新することができる。このため、センサ、ホルダ、電装品を含むコストの削減が可能となり。また、複雑な計算式を使用していない為にソフトの簡素化が可能となり外気温度センサを有する機種とのソフトの共用可が図れる、加えて、室外ファンを駆動させることにより検知精度をあげることが可能となる。 The air conditioner of the present invention can estimate the outside air temperature without using the outside air temperature sensor, and can update the outside air temperature every time the compressor is started. This makes it possible to reduce costs including sensors, holders, and electrical components. In addition, since no complicated calculation formula is used, software can be simplified, and software can be shared with models that have an outdoor temperature sensor. In addition, detection accuracy can be improved by driving an outdoor fan. Is possible.
第１の発明は、圧縮機起動前に室外ファンを所定時間(Ｔａ)運転することにより、外気温度と室外熱交換器温度を近づけることができ、検知精度を高めることが可能となる。 In the first invention, by operating the outdoor fan for a predetermined time (Ta) before starting the compressor, the outdoor air temperature and the outdoor heat exchanger temperature can be brought close to each other, and the detection accuracy can be improved.
第２の発明は圧縮機停止後、室外ファンを所定時間(Ｔｂ)運転することにより、冷媒の均圧を促進することとなり短時間で室外熱交換器温度を外気温度に近づけることができ、圧縮機再起動の際には毎回外気温度を再推定することで検知精度を高めることが可能となる。 In the second invention, after the compressor is stopped, the outdoor fan is operated for a predetermined time (Tb), so that the pressure equalization of the refrigerant is promoted, and the outdoor heat exchanger temperature can be brought close to the outdoor air temperature in a short time. When restarting the machine, it is possible to improve the detection accuracy by re-estimating the outside air temperature each time.
第３の発明は、第1、第２の発明を組み合わせることにより、より精度よく外気温度を
推定することが可能となる。
The third invention can estimate the outside air temperature with higher accuracy by combining the first and second inventions.
第４の発明は、室外熱交換器温度により、室外ファンの運転時間(Ｔａ,Ｔｂ)を変更することで、室外熱交換器温度を外気温度に確実に近づけ検知精度を高めることができる。 According to the fourth aspect of the present invention, the outdoor heat exchanger temperature can be reliably brought close to the outdoor air temperature and the detection accuracy can be improved by changing the operation time (Ta, Tb) of the outdoor fan according to the outdoor heat exchanger temperature.
第５の発明は、室外熱交換器温度により、室外ファンの回転数を変更することで、室外熱交換器温度を外気温度に確実に近づけ検知精度を高めることができる。 According to the fifth aspect of the present invention, the detection accuracy can be increased by reliably bringing the outdoor heat exchanger temperature close to the outdoor air temperature by changing the rotational speed of the outdoor fan according to the outdoor heat exchanger temperature.
第６の発明は、特に、第１〜５の発明の空気調和機を所定時間(ｔｃ)圧縮機が連続運転した際に圧縮機を一旦停止させ、外気温度を再推定することにより、一定の周期で外気温度を更新することができる。 In the sixth invention, in particular, when the compressor is continuously operated for a predetermined time (tc) in the air conditioners of the first to fifth inventions, the compressor is temporarily stopped, and the outside air temperature is re-estimated, so that the constant temperature is maintained. The outside air temperature can be updated in a cycle.
第７の発明は、特に、第６の発明の空気調和機を、除霜運転中は圧縮機停止とみなさないことにより、除霜運転中に圧縮機が停止しても外気温度が更新されなくなり外気温度の誤検知を避けることができる。 In the seventh invention, in particular, the air conditioner of the sixth invention is not regarded as a compressor stop during the defrosting operation, so that the outside air temperature is not updated even if the compressor stops during the defrosting operation. False detection of outside air temperature can be avoided.
第８の発明は、第６または７の発明の室外機において、室外熱交換器温度が所定温度(Ｔａ)以下になった場合、所定時間(Ｔｃ)連続運転後も圧縮機を停止させないことにより、除霜運転直前の圧縮機停止を避けることができ、除霜運転を確実に行うことができる。 According to an eighth invention, in the outdoor unit of the sixth or seventh invention, when the outdoor heat exchanger temperature becomes equal to or lower than a predetermined temperature (Ta), the compressor is not stopped even after a predetermined time (Tc) continuous operation. The compressor stop immediately before the defrosting operation can be avoided, and the defrosting operation can be performed reliably.
第９の発明は、第８の発明の室外機において、室外熱交換器温度が所定温度Ｔｂ
(>Ｔａ)を上回ったときに圧縮機を停止させることにより、配管温度のハンチングによる誤動作を避けることが出来る。
A ninth invention is the outdoor unit of the eighth invention, wherein the outdoor heat exchanger temperature is a predetermined temperature Tb.
By stopping the compressor when (> Ta) is exceeded, malfunction due to piping temperature hunting can be avoided.
第１０の発明は、第６〜９の発明の室外機において、除霜運転中は圧縮機を停止させないことで、除霜動作を確実に行うことができる。 According to a tenth aspect, in the outdoor units of the sixth to ninth aspects, the defrosting operation can be reliably performed by not stopping the compressor during the defrosting operation.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
図１は、本発明の第１の実施の形態における空気調和機のフローチャート、図２、図３はタイムチャートを示すものである。
(Embodiment 1)
FIG. 1 is a flowchart of the air conditioner according to the first embodiment of the present invention, and FIGS. 2 and 3 are time charts.
図１において、ＳＴ０１で、圧縮機起動前に室外ファンを所定時間(Ｔａ)運転する。その後、ＳＴ０２で室外熱交換器温度を外気温度として採用し、ＳＴ０３で圧縮機を起動する。 In FIG. 1, in ST01, the outdoor fan is operated for a predetermined time (Ta) before the compressor is started. Thereafter, the outdoor heat exchanger temperature is adopted as the outside air temperature in ST02, and the compressor is started in ST03.
ＳＴ０４で、圧縮機の連続運転時間がｔｃに達した場合、ＳＴ０５へと進む。ただし、ｔｃ以前に圧縮機が停止した場合には、ＳＴ０１へ戻る（図示せず）。ＳＴ０５では、室外配管温度がＴａ以下かどうかを判定し、Ｔａ以下であればＳＴ０６へ、そうでなければＳＴ０７へと進む。ＳＴ０６で、配管温度がＴｂ以上になった場合、ＳＴ０７へ進む。ＳＴ０７では、除霜運転中かどうかを判別している。除霜運転中である場合には、ＳＴ８へ進み、除霜運転中ではない場合にはＳＴ０９へ進む。ＳＴ０８では、除霜運転の終了を判定し、終了した場合にＳＴ０９へと進む。 When the continuous operation time of the compressor reaches tc in ST04, the process proceeds to ST05. However, if the compressor stops before tc, the process returns to ST01 (not shown). In ST05, it is determined whether or not the outdoor pipe temperature is equal to or lower than Ta. If it is equal to or lower than Ta, the process proceeds to ST06, and if not, the process proceeds to ST07. If the pipe temperature is equal to or higher than Tb in ST06, the process proceeds to ST07. In ST07, it is determined whether or not the defrosting operation is being performed. When the defrosting operation is being performed, the process proceeds to ST8, and when the defrosting operation is not being performed, the process proceeds to ST09. In ST08, the end of the defrosting operation is determined, and when it is completed, the process proceeds to ST09.
ＳＴ０９で、外気温度の更新を行う作業へ入るために、圧縮機を強制的に停止させる。ＳＴ１０では、冷媒の均圧促進のために室外ファンをＴａ間運転させる。その後ＳＴ０１にもどり同様の手順で外気温度を更新する。 In ST09, the compressor is forcibly stopped in order to start work for updating the outside air temperature. In ST10, the outdoor fan is operated between Ta to promote equalization of the refrigerant. Thereafter, returning to ST01, the outside air temperature is updated in the same procedure.
ここで、除霜運転とは、暖房運転中に、室外熱交換器に発生した霜による熱交換器能力低下を防ぐ為、暖房運転中に所定時間冷房運転を行い室外熱交換器を加熱することにより、室外熱交換器に発生した霜を除去する運転制御で、具体的には、暖房運転中に四方弁を切り替えて冷房運転を行うことである。これにより、室外の熱交換器温度が上がり、室外熱交換器に発生した霜を除霜することができる。 Here, the defrosting operation refers to heating the outdoor heat exchanger by performing a cooling operation for a predetermined time during the heating operation in order to prevent a decrease in heat exchanger capacity due to frost generated in the outdoor heat exchanger during the heating operation. Thus, in the operation control for removing frost generated in the outdoor heat exchanger, specifically, the cooling operation is performed by switching the four-way valve during the heating operation. Thereby, the outdoor heat exchanger temperature rises and the frost generated in the outdoor heat exchanger can be defrosted.
図２は、タイムチャートである。圧縮機が連続ｔｃ間運転した時点で上昇している配管温度は、圧縮機停止後室外ファンをＴｂ間運転する間に均圧により外気温度と近づき、圧縮機再起動の瞬間に外気温度を更新する。 FIG. 2 is a time chart. The temperature of the pipe that has risen when the compressor is operated for a continuous tc approaches the outside air temperature by equalization while the outdoor fan is operated for Tb after the compressor stops, and the outside temperature is updated at the moment of restarting the compressor. To do.
図３は、配管温度がＴａ以下になった場合のタイムチャートである。 ｔｃ経過後も圧縮機停止は行わずに、配管温度が、Ｔｂを超えた場合に圧縮機を停止させる。ただし、Ｔｂを越えた時点で、除霜運転中であった場合には、除霜運転が終了した後に圧縮機を停止させる。 FIG. 3 is a time chart when the pipe temperature is equal to or lower than Ta. The compressor is not stopped even after elapse of tc, and the compressor is stopped when the pipe temperature exceeds Tb. However, if the defrosting operation is being performed when Tb is exceeded, the compressor is stopped after the defrosting operation is completed.
以上のように、本実施の形態においては、圧縮機起動前及び圧縮機停止後に室外ファンを所定時間運転して外気を筐体内の室外熱交換器に送り込み、室外熱交換器温度を外気温度に近づけてから、圧縮機起動時の室外熱交換器温度を外気温度として更新するものである。 As described above, in the present embodiment, the outdoor fan is operated for a predetermined time before the compressor is started and after the compressor is stopped, and the outside air is sent to the outdoor heat exchanger in the housing, and the outdoor heat exchanger temperature is set to the outside air temperature. Then, the outdoor heat exchanger temperature at the time of starting the compressor is updated as the outside air temperature.
これによって、短時間で室外熱交換器温度と外気温度を近づけることができ、圧縮機起動の際には毎回外気温度を更新することが可能となる。 As a result, the outdoor heat exchanger temperature and the outside air temperature can be brought close to each other in a short time, and the outside air temperature can be updated every time the compressor is started.
また、圧縮機が所定時間(ｔｃ)以上連続運転した際には、圧縮機を一旦停止させ、室外ファンを所定時間駆動して、室外熱交換器温度を再測定して外気温度を再推定することで外気温の変動に対応して、外気温度を更新することが可能となる。 Further, when the compressor is continuously operated for a predetermined time (tc) or longer, the compressor is temporarily stopped, the outdoor fan is driven for a predetermined time, the outdoor heat exchanger temperature is remeasured, and the outdoor air temperature is re-estimated. Thus, it becomes possible to update the outside air temperature in response to a change in the outside air temperature.
その際、除霜運転で圧縮機が停止した場合には、圧縮機停止とみなさないことで、除霜運転を妨げない制御とするものである。 At that time, when the compressor is stopped during the defrosting operation, the control is performed so as not to interfere with the defrosting operation by not considering the compressor as being stopped.
また、室外熱交換器温度が所定温度(Ｔａ)以下になった場合には、圧縮機が所定時間(ｔｃ)以上連続運転した後であっても圧縮機を停止させないことで不必要な運転停止を避け、快適な空調制御を可能とするものである。 In addition, when the outdoor heat exchanger temperature falls below a predetermined temperature (Ta), an unnecessary operation stop is achieved by not stopping the compressor even after the compressor has been continuously operated for a predetermined time (tc) or longer. This makes it possible to perform comfortable air conditioning control.
更に、室外熱交換器温度が所定温度Ｔｂ(>Ｔａ)を上回った場合には圧縮機を停止させ、また、圧縮機が所定時間(ｔｃ)以上連続運転し、かつその際に除霜運転を行った場合には除霜運転終了後に、室外熱交換器温度を再測定して外気温度を再推定することで、必要時には外気温の再推定を行うような制御を追加するものである。 Further, when the outdoor heat exchanger temperature exceeds a predetermined temperature Tb (> Ta), the compressor is stopped, and the compressor is continuously operated for a predetermined time (tc) or more, and the defrosting operation is performed at that time. In the case where it is performed, after the defrosting operation is completed, the outdoor heat exchanger temperature is re-measured to re-estimate the outside air temperature, and control is performed to re-estimate the outside air temperature when necessary.
以上のような制御により、外気温度センサを使用せずに外気温度を推定し、圧縮機起動の際には毎回外気温度を更新することができる。このため、センサ、ホルダ、電装品を含むコストの削減が可能となり。また、複雑な計算式を使用していない為にソフトの簡素化が可能となり外気温度センサを有する機種とのソフトの共用可が図れる、加えて、室外ファンを駆動させることにより検知精度をあげることが可能となる。 With the control as described above, the outside temperature can be estimated without using the outside temperature sensor, and the outside temperature can be updated every time the compressor is started. This makes it possible to reduce costs including sensors, holders, and electrical components. In addition, since no complicated calculation formula is used, software can be simplified, and software can be shared with models that have an outdoor temperature sensor. In addition, detection accuracy can be improved by driving an outdoor fan. Is possible.
（実施の形態２）
図４は、本発明の第２の実施の形態における室外熱交換器温度と室外ファンの運転時間（ｔａまたは、ｔｂ）との相関図を示すものである。
(Embodiment 2)
FIG. 4 is a correlation diagram between the outdoor heat exchanger temperature and the outdoor fan operating time (ta or tb) in the second embodiment of the present invention.
室外熱交換器温度が高いほど、室外ファンの運転時間を伸ばし、放熱を促進し検知精度
を高めることが可能となる。従って、外気温度センサを使用せずに外気温度を推定し、圧縮機起動の際には毎回外気温度を更新することができる。このため、センサ、ホルダ、電装品を含むコストの削減が可能となり。また、複雑な計算式を使用していない為にソフトの簡素化が可能となり外気温度センサを有する機種とのソフトの共用可が図れる、加えて、室外ファンを駆動させることにより検知精度をあげることが可能となる。
As the outdoor heat exchanger temperature is higher, it is possible to extend the operation time of the outdoor fan, promote heat dissipation, and increase detection accuracy. Therefore, the outside temperature can be estimated without using the outside temperature sensor, and the outside temperature can be updated every time the compressor is started. This makes it possible to reduce costs including sensors, holders, and electrical components. In addition, since no complicated calculation formula is used, software can be simplified, and software can be shared with models that have an outdoor temperature sensor. In addition, detection accuracy can be improved by driving an outdoor fan. Is possible.
（実施の形態３）
図５は、本発明の第３の実施の形態における室外熱交換器温度と室外ファンの回転数の相関図を示すものである。
室外熱交換器温度が高いほど、室外ファンの回転数を増加させ、放熱を促進し検知精度を高めることが可能となる。従って、外気温度センサを使用せずに外気温度を推定し、圧縮機起動の際には毎回外気温度を更新することができる。このため、センサ、ホルダ、電装品を含むコストの削減が可能となり、また、複雑な計算式を使用していない為にソフトの簡素化が可能となり外気温度センサを有する機種とのソフトの共用可が図れる、加えて、室外ファンを駆動させることにより検知精度をあげることが可能となる。
(Embodiment 3)
FIG. 5 is a correlation diagram between the outdoor heat exchanger temperature and the rotational speed of the outdoor fan in the third embodiment of the present invention.
As the outdoor heat exchanger temperature is higher, the rotational speed of the outdoor fan is increased, heat dissipation is promoted, and detection accuracy can be increased. Therefore, the outside temperature can be estimated without using the outside temperature sensor, and the outside temperature can be updated every time the compressor is started. For this reason, it is possible to reduce costs including sensors, holders, and electrical components. Also, since no complicated calculation formula is used, software can be simplified and software can be shared with models that have an outside air temperature sensor. In addition, the detection accuracy can be increased by driving the outdoor fan.
以上のように、本発明にかかる空気調和機は、外気温度センサを使用せずに外気温度の推定が可能となるので、除湿機等の用途にも適用できる。 As described above, since the air conditioner according to the present invention can estimate the outside air temperature without using the outside air temperature sensor, it can be applied to applications such as a dehumidifier.
Claims (10)
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| JP2004376059A JP4432773B2 (en) | 2004-12-27 | 2004-12-27 | Air conditioner |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009270786A (en) * | 2008-05-09 | 2009-11-19 | Sharp Corp | Air conditioner |
| JP2013053765A (en) * | 2011-09-01 | 2013-03-21 | Daikin Industries Ltd | Air conditioner |
| CN110145843A (en) * | 2019-04-19 | 2019-08-20 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| WO2020008495A1 (en) * | 2018-07-02 | 2020-01-09 | 三菱電機株式会社 | Refrigeration cycle device, air conditioner device, and water heater |
| CN112648722A (en) * | 2020-12-23 | 2021-04-13 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner, electronic equipment and storage medium |
| CN113531774A (en) * | 2021-07-13 | 2021-10-22 | 珠海拓芯科技有限公司 | Air conditioner external ring temperature calculation method and device, air conditioner and computer storage medium |
| US11486617B2 (en) | 2017-10-27 | 2022-11-01 | Mitsubishi Electric Corporation | Refrigeration cycle apparatus |
-
2004
- 2004-12-27 JP JP2004376059A patent/JP4432773B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009270786A (en) * | 2008-05-09 | 2009-11-19 | Sharp Corp | Air conditioner |
| JP2013053765A (en) * | 2011-09-01 | 2013-03-21 | Daikin Industries Ltd | Air conditioner |
| US11486617B2 (en) | 2017-10-27 | 2022-11-01 | Mitsubishi Electric Corporation | Refrigeration cycle apparatus |
| WO2020008495A1 (en) * | 2018-07-02 | 2020-01-09 | 三菱電機株式会社 | Refrigeration cycle device, air conditioner device, and water heater |
| JPWO2020008495A1 (en) * | 2018-07-02 | 2020-12-17 | 三菱電機株式会社 | Refrigeration cycle equipment, air conditioner and hot water supply equipment |
| CN110145843A (en) * | 2019-04-19 | 2019-08-20 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN110145843B (en) * | 2019-04-19 | 2021-01-29 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN112648722A (en) * | 2020-12-23 | 2021-04-13 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner, electronic equipment and storage medium |
| CN113531774A (en) * | 2021-07-13 | 2021-10-22 | 珠海拓芯科技有限公司 | Air conditioner external ring temperature calculation method and device, air conditioner and computer storage medium |
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