JP2011158121A - Air conditioner - Google Patents

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JP2011158121A
JP2011158121A JP2010018177A JP2010018177A JP2011158121A JP 2011158121 A JP2011158121 A JP 2011158121A JP 2010018177 A JP2010018177 A JP 2010018177A JP 2010018177 A JP2010018177 A JP 2010018177A JP 2011158121 A JP2011158121 A JP 2011158121A
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air conditioner
compressor
discharge temperature
expansion valve
value
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Takayuki Izeki
Mitsuhiro Kamata
Yasuhiro Nakamura
康裕 中村
貴之 井関
充博 鎌田
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Panasonic Corp
パナソニック株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner that properly conducts failure determination in refrigerating cycle. <P>SOLUTION: The air conditioner includes: the refrigerating cycle that is formed so that a compressor 8, a four-way valve 9, an outside heat exchanger 10, a fluid flow variable expansion valve 15 and an inside heat exchanger 3 are sequentially connected; an emission temperature detecting means 14 that detects emission temperature of the refrigerating cycle; a storage means 13 that stores a restriction opening of the fluid flow variable expansion valve and the emission temperature; and a running current value storage means 13 that detects and stores a running current value of the air conditioner. The air conditioner stops to operate the compressor when the restriction opening of the expansion valve exceeds the setting value, the emission temperature detected by the emission temperature detection means exceeds the emission temperature setting value and an operation current value of the air conditioner is below an operation current setting value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、空気調和機に関するもので、特に、冷凍サイクル内の圧縮機の保護制御に関するものである。 The present invention relates to an air conditioner, and more particularly to a protection control of the compressor in the refrigeration cycle.

従来の空気調和機では、冷凍サイクル内の冷媒が少ない状態、あるいは冷媒が抜けてしまっている状態、冷凍サイクルのどこかで詰まってしまっている状態における圧縮機の保護制御として、圧縮機の温度過昇を保護するための圧縮機温度センサや吐出温度センサを設けて、それらの温度に基づいて圧縮機の運転を制御するか、あるいは圧縮機内部にインナーサーマルプロテクタを内蔵する方法が一般的であった。 In the conventional air conditioner, the refrigerant is less state in the refrigeration cycle or state in which the refrigerant is gone missing, as a protective control of the compressor in a state that clogged somewhere in the refrigeration cycle, the temperature of the compressor provided the compressor temperature sensor and discharge temperature sensor for protecting an excessive, or to control the operation of the compressor based on their temperature, or a method of incorporating the inner thermal protector inside the compressor is common there were.

しかしながらこのようなセンサの取付けやプロテクタの内蔵では、センサ取り付けにかかる製造コストが増大してしまうという課題を有していた。 However with the built-in mounting and protector of such sensors, manufacturing cost of the sensor mounting had a problem that increases.

それに対して、従来のヒートポンプ式の空気調和機では、冷凍サイクルの冷媒の凝縮温度を検出する室内配管温度検出手段と、冷凍サイクルを制御すると共に室外総合運転電流検知手段及び室外総合運転電流設定記憶手段と室内配管温度設定記憶手段と判定手段とを有する制御装置を設け、制御装置は、室外総合運転電流が設定値より下回り、かつ冷房運転時は室内配管温度が設定温度を所定時間上回った時、または、暖房運転時は室内配管温度が設定温度を所定時間下回った時に、圧縮機を停止するように構成している(例えば、特許文献1参照)。 In contrast, in the conventional heat pump type air conditioner, the indoor piping temperature detecting means for detecting a condensation temperature of the refrigerant of the refrigeration cycle, the outdoor overall operating current detector and the outdoor overall operating current setting storage and controls the refrigeration cycle a control device having a means and an indoor piping temperature setting memory means and judging means is provided, when the control device is below than the outdoor overall operating current setting value, and during cooling operation of the indoor piping temperature is above the set temperature predetermined time or, during the heating operation is configured to when the indoor piping temperature is below the set temperature predetermined time, stops the compressor (e.g., see Patent Document 1).

特開2003−329312号公報 JP 2003-329312 JP

しかしながら、上述した冷凍サイクル保護制御を有する空気調和機においては、冷媒がある程度抜けた状態で設置された空気調和機の空調条件や運転条件によっては、誤動作や誤判定をしてしまう場合があるという課題を有していた。 However, as in the air conditioner having a refrigerating cycle protection control described above, the air conditioning conditions and the operating conditions of the air conditioner refrigerant is installed at a certain dropout condition, in some cases by a malfunction or erroneous determination It has been a problem.

本発明は、適切に冷凍サイクルの異常判定を行うことができる空気調和機を提供することを目的とする。 The present invention aims to provide an air conditioner capable of performing abnormality determination of the proper refrigerating cycle.

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、四方弁、室外側熱交換器、流量可変型の膨張弁、室内側熱交換器の順に環状に接続して形成された冷凍サイクルと、冷凍サイクルの吐出温度を検出する吐出温度検出手段と、流量可変型の膨張弁の絞り開度と吐出温度を記憶する記憶手段と、空気調和機の運転電流値を検出し記憶する運転電流値記憶手段とを備えた空気調和機であって、膨張弁の絞り開度が設定値以上で、かつ吐出温度検出手段で検出される吐出温度が吐出温度設定値以上で、かつ空気調和機の運転電流値が運転電流設定値以下の場合に、圧縮機の運転を停止させることにより、冷凍サイクルの異常を判断して、圧縮機の運転を停止することで圧縮機の保護を図ることができる。 In order to solve the conventional problems, an air conditioner of the present invention, a compressor, a four-way valve, an outdoor heat exchanger, a flow rate-variable expansion valve, and connected annularly order of the indoor side heat exchanger formed and has been the refrigeration cycle, to detect the discharge temperature detecting means for detecting a discharge temperature of the refrigeration cycle, storage means for storing the throttle opening degree of the flow rate-variable expansion valve discharge temperature, the operating current of the air conditioner an air conditioner and a driving current value storage means for storing, by the diaphragm opening of the expansion valve is more than the set value, and the discharge temperature detected by the discharge temperature detecting means discharge temperature set value or more, and when operating current of the air conditioner is below the operating current setting value, by stopping the operation of the compressor, to determine the abnormality of the refrigerating cycle, the protection of the compressor by stopping the operation of the compressor it is possible to achieve.

本発明の空気調和機は、適切に冷凍サイクルの異常判定を行うことができる空気調和機を提供することができる。 Air conditioner of the present invention can provide an air conditioner capable of performing abnormality determination of the proper refrigerating cycle.

本発明の実施の形態1における空気調和機の回路図 Circuit diagram of an air conditioner according to the first embodiment of the present invention 同実施の形態1における空気調和機のフローチャート Flow chart of an air conditioner according to Embodiment 1 of the same embodiment 同実施の形態2における空気調和機のフローチャート Flow chart of an air conditioner according to Embodiment 2 of the same embodiment 同実施の形態2における外気温度と運転電流設定値との関連図 Related view of the outside air temperature and the operating current setpoint in the second same embodiment 同実施の形態3における空気調和機のフローチャート Flow chart of an air conditioner according to Embodiment 3 of the same embodiment

第1の発明の空気調和機は、圧縮機、四方弁、室外側熱交換器、流量可変型の膨張弁、室内側熱交換器の順に環状に接続して形成された冷凍サイクルと、冷凍サイクルの吐出温度を検出する吐出温度検出手段と、流量可変型の膨張弁の絞り開度と吐出温度を記憶する記憶手段と、空気調和機の運転電流値を検出し記憶する運転電流値記憶手段とを備えた空気調和機であって、膨張弁の絞り開度が設定値以上で、かつ吐出温度検出手段で検出される吐出温度が吐出温度設定値以上で、かつ空気調和機の運転電流値が運転電流設定値以下の場合に、圧縮機の運転を停止させることにより、冷凍サイクルの異常を判断して、圧縮機の運転を停止することで圧縮機の保護を図ることができる。 Air conditioner of the first invention, the compressor, four-way valve, an outdoor heat exchanger, a flow rate-variable expansion valve, and a refrigeration cycle formed by annularly connecting in the order of the indoor side heat exchanger, the refrigeration cycle a discharge temperature detection means for detecting the discharge temperature, storage means for storing the throttle opening degree of the flow rate-variable expansion valve discharge temperature, the operating current value storage means for detecting and storing the operating current of the air conditioner an air conditioner having the at throttle opening degree of the expansion valve is more than the set value, and the discharge temperature detected by the discharge temperature detecting means discharge temperature set value or more, and the operating current of the air conditioner if: driving current setting value, by stopping the operation of the compressor, and determines an abnormality of the refrigeration cycle, it is possible to protect the compressor by stopping the operation of the compressor.

第2の発明の空気調和機は、圧縮機の周波数を検出し記憶する周波数検出手段を備え、圧縮機の周波数が所定の周波数以上の時のみ第1の発明の制御を行うことにより、周波数が低い時に冷凍サイクルが正常であるにもかかわらず、条件を満たしてしまうことによって誤動作して圧縮機を止めてしまうことを防ぐ。 The air conditioner of the second invention comprises a frequency detection means for detecting storing the frequency of the compressor, by the frequency of the compressor controls the first invention only in the above predetermined frequency, the frequency despite the refrigeration cycle is normal when the temperature is low, it prevents you stop the compressor to malfunction by that would meet the conditions.

第3の発明の空気調和機は、特に第1または第2の発明において、運転電流設定値は、外気温度に応じて2段階以上に運転電流設定値を設けていることにより、より正確な冷凍サイクルの状態を検知することができる。 Air conditioner of the third aspect of the invention, in particular the first or second invention, the operating current setting value, by are provided operating current setpoint in two or more stages depending on the outside air temperature, a more accurate refrigerating it is possible to detect the state of the cycle.

第4の発明の空気調和機は、特に第1から第3の発明において、膨張弁の絞り開度が設定値以上で、かつ吐出温度検出手段で検出される吐出温度が所定時間の間、吐出温度設定値以上で、かつ空気調和機の運転電流値が運転電流設定値以下の場合に、圧縮機を停止させることにより、圧縮機の運転が安定するまで検知を遅らせることで、誤動作を防止することができる。 Air conditioner of the fourth invention is the first to third inventions, while the discharge temperature for a predetermined time throttle opening degree of the expansion valve is the setting value or more, and that is detected by the discharge temperature detecting means, the discharge at a temperature more than the set value, and when the operating current of the air conditioner is below the operating current setting value, by stopping the compressor, the operation of the compressor by delaying the detection to stabilize, to prevent malfunction be able to.

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。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 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。 It should be understood that the present invention is not limited by the embodiments.

(実施の形態1) (Embodiment 1)
図1は、本実施の形態1における空気調和機の回路図である。 Figure 1 is a circuit diagram of the air conditioner of the first embodiment. 図1に示すように、本実施の形態1における空気調和機は、冷媒を圧縮する圧縮機8と、冷房時と暖房時で冷媒流路を切り替える四方弁9と、冷媒と外気とが熱交換を行う室外熱交換器10と、冷媒を減圧する電動膨張弁15と、室内空気と冷媒とが熱交換を行う室内熱交換器3とを冷媒配管により環状に接続することで冷凍サイクルを構成している。 As shown in FIG. 1, the air conditioner in the first embodiment, a compressor 8 for compressing the refrigerant, the cooling and the four-way valve 9 for switching the refrigerant flow path in the heating heat exchange between the refrigerant and outside air an outdoor heat exchanger 10 that performs an electric expansion valve 15 for decompressing the refrigerant, an indoor heat exchanger 3 and the indoor air and the refrigerant exchange heat constitutes a refrigerating cycle by connecting the annular by refrigerant pipes ing.

また、室内熱交換器3の近傍には、室内熱交換器3で室内空気と冷媒との熱交換を促進するために室内ファン4が設けられており、室外熱交換器10の近傍には外気と冷媒との熱交換を促進するために室外ファン12と、室外ファン12を駆動させるファンモータ5と、室温を検出する温度センサ6と、室外の外気温度を検出する外気温度センサ11と、圧縮機からの吐出温度を検出する吐出温度検出手段である吐出温度センサ14と、空気調和機を構成する室内ユニット1の制御を行う室内制御装置7と、室外ユニット2の制御を行う室外制御装置13とを備えている。 In the vicinity of the indoor heat exchanger 3, and the indoor fan 4 is provided to facilitate the heat exchange between the indoor air and the refrigerant in the indoor heat exchanger 3, ambient air in the vicinity of the outdoor heat exchanger 10 and the outdoor fan 12 to facilitate heat exchange with the refrigerant, a fan motor 5 for driving the outdoor fan 12, a temperature sensor 6 for detecting the room temperature, the outside air temperature sensor 11 for detecting the outdoor ambient temperature, compression a discharge temperature sensor 14 is a discharge temperature detection means for detecting the discharge temperature from the machine, the indoor control unit 7 for controlling the indoor unit 1 constituting the air conditioner, the outdoor control unit for controlling the outdoor unit 2 13 It is equipped with a door.

また、流量可変型の膨張弁の絞り開度と吐出温度を記憶する記憶手段と、空気調和機の運転電流値を検出し記憶する運転電流値記憶手段とを有しており、これらの機能を室外制御装置13が備えている。 Further, storage means for storing the throttle opening degree of the flow rate-variable expansion valve discharge temperature, has a driving current value storage means for detecting and storing the operating current of the air conditioner, these functions the outdoor controller 13 is provided. そして空気調和機は、室内制御装置7と室外制御装置13とによって制御される。 The air conditioner is controlled by the indoor control unit 7 and the outdoor control unit 13.

次に、図2のフローチャートに従って、本実施の形態における空気調和機の制御を説明する。 Then, according to the flowchart of FIG. 2, illustrating the control of the air conditioner of this embodiment.

まず、ステップ1で空気調和機の運転がスタートすると、ステップ2では圧縮機8が運転しているかどうかを判断する。 First, the operation of the air conditioner is started in step 1, it is determined whether the compressor 8 in step 2 is operating. ステップ2で圧縮機8が運転している場合は、ステップ3で現状の膨張弁15の開度EXP、圧縮機8からの吐出温度Td、空気調和機の運転電流値Aを室外制御装置13に記憶する。 Step If the compressor 8 is operating at 2, opening EXP of the current expansion valve 15 at Step 3, the discharge temperature Td of the compressor 8, the driving current value A of the air conditioner to the outdoor control unit 13 Remember.

そして、ステップ4で現在の膨張弁開度EXPが、予め設定されている設定値exp1より大きい場合、かつ、吐出温度センサ14で検出した冷媒の吐出温度Tdが、予め設定している吐出温度設定値t1よりも大きい場合、かつ、運転電流値Aが運転電流設定値a1より小さい場合は、ステップ5で圧縮機の運転を停止する。 The current expansion valve EXP in step 4 is greater than the set value exp1 which is set in advance, and the discharge temperature Td of the refrigerant detected by the discharge temperature sensor 14, the discharge temperature settings preset larger than the value t1, and, if the operating current value a is operating current less than the set value a1 stops the operation of the compressor in step 5.

このように本実施例では、通常冷媒がある程度抜けた状態であっても膨張弁を開くことで吐出温度を下げる動作になり、圧縮機などの冷凍サイクルが異常になることはないが、室内、室外負荷が高い状態などの時は、膨張弁開度が設定開度以上になり、膨張弁による冷凍サイクルの温度制御ができなくなるため圧縮機からの吐出温度を下げることができない。 Thus, in this embodiment, even when the normal refrigerant has passed through a certain degree it will operate to lower the discharge temperature by opening the expansion valve, but it never becomes abnormal refrigerating cycle such as a compressor, an indoor, when such outside load is high, the expansion valve opening degree becomes equal to or greater than the set opening degree, it is impossible to lower the discharge temperature from the compressor to become impossible to control the temperature of the refrigeration cycle due to the expansion valve.

そこで、膨張弁開度と吐出温度と運転電流値とに基づいて冷凍サイクルの異常を判断し、モータのコイル、圧縮機構部を過昇温から保護することができる。 Therefore, it is possible on the basis of the expansion valve and the discharge temperature and the operating current determines the abnormality of the refrigerating cycle, to protect the motor coil, a compression mechanism portion from the excessive temperature rise.

(実施の形態2) (Embodiment 2)
実施の形態2における空気調和機の回路図は、実施の形態1と同様であるため、実施の形態1と同じ符号を付して説明を省略する。 Circuit diagram of an air conditioner in the second embodiment are the same as in the first embodiment, its description is omitted with the same reference numerals as in the first embodiment. 次に、図3のフローチャートに従って、本実施の形態における空気調和機の制御を説明する。 Then, according to the flowchart of FIG. 3, illustrating the control of the air conditioner of this embodiment.

まず、ステップ1で空気調和機の運転がスタートすると、ステップ2では圧縮機8が運転しているかどうかを判断する。 First, the operation of the air conditioner is started in step 1, it is determined whether the compressor 8 in step 2 is operating. ステップ2で圧縮機8が運転している場合は、ステップ3に移る。 Step 2 If the compressor 8 is in operation, the process proceeds to step 3.

ステップ3では、周波数検出手段である室外制御装置13で、圧縮機8の周波数CompHzを検出し記憶する。 In step 3, the outdoor control unit 13 is a frequency detection means, for detecting and storing the frequency CompHz of the compressor 8. そして、ステップ4では、検出した周波数CompHzが設定値Hz2よりも小さい場合は、冷媒状態が正常であると判断し、ステップ3に戻る。 In step 4, when the detected frequency CompHz is smaller than the set value Hz2, it is determined that the refrigerant state is normal, the flow returns to step 3. 一方、ステップ3で検出した周波数CompHzが設定値Hz2よりも大きい場合は、ステップ5へ移り、現状の膨張弁15の開度EXP、圧縮機8からの吐出温度Td、空気調和機の運転電流値Aを室外制御装置13に記憶する。 On the other hand, if the detected frequency CompHz is larger than the set value Hz2 in step 3, the process proceeds to step 5, the opening EXP of the expansion valve 15 of the present situation, the discharge temperature Td of the compressor 8, the operating current of the air conditioner storing a to the outdoor control unit 13.

そして、ステップ6で現在の膨張弁開度EXPが、予め設定されている設定値exp2より大きい場合、かつ、吐出温度センサ14で検出した冷媒の吐出温度Tdが、予め設定している吐出温度設定値t2よりも大きい場合、かつ、運転電流値Aが運転電流設定値a2より小さい場合は、ステップ7で圧縮機の運転を停止する。 The current expansion valve EXP in step 6 is greater than the set value exp2 which is set in advance, and the discharge temperature Td of the refrigerant detected by the discharge temperature sensor 14, the discharge temperature settings preset If greater than the value t2, and, when the operating current value a is operating current less than the set value a2 stops the operation of the compressor at step 7.

このように本実施例では、通常冷媒がある程度抜けた状態であっても膨張弁を開くことで吐出温度を下げる動作になり、圧縮機などの冷凍サイクルが異常になることはないが、室内、室外負荷が高い状態などの時は、膨張弁開度が設定開度以上になり、膨張弁による冷凍サイクルの温度制御ができなくなるため圧縮機からの吐出温度を下げることができない。 Thus, in this embodiment, even when the normal refrigerant has passed through a certain degree it will operate to lower the discharge temperature by opening the expansion valve, but it never becomes abnormal refrigerating cycle such as a compressor, an indoor, when such outside load is high, the expansion valve opening degree becomes equal to or greater than the set opening degree, it is impossible to lower the discharge temperature from the compressor to become impossible to control the temperature of the refrigeration cycle due to the expansion valve.

さらに、圧縮機の周波数が低い状態では、冷凍サイクルの状態が正常であっても、膨張弁開度と吐出温度と運転電流値が全て条件を満たしてしまい、誤動作して圧縮機の運転を止めてしまう。 Further, in the state the frequency is low compressor, even in normal state of the refrigeration cycle, an expansion valve opening and the discharge temperature would meet the operating current for all conditions, stopping the operation of the compressor malfunctions and will.

そこで、まず圧縮機の周波数に基づいて、誤動作してしまう条件を排除し、さらに膨張弁開度と吐出温度と運転電流値とに基づいて冷凍サイクルの異常を判断するので、より確実に異常を判断することができ、モータのコイル、圧縮機構部を過昇温から保護することができる。 Accordingly, first on the basis of the frequency of the compressor, eliminating the conditions malfunctions, since further determines an abnormality of the refrigeration cycle on the basis of the expansion valve and the discharge temperature and the operating current, the more reliably the abnormality can be determined, the motor coil, a compression mechanism portion can be protected from excessive temperature rise.

また、本実施の形態では、運転電流設定値a2は、外気温度がGaより小さい時と、外気温度がGaよりも大きい時とでは異ならせて設定している。 Further, in the present embodiment, the operating current setting value a2 is a time outside air temperature is less than Ga, the outside air temperature is set at different at the time greater than Ga. 図4は本実施の形態における運転電流設定値a2を示したものである。 Figure 4 shows the operating current setting value a2 in the present embodiment. 外気温度がGaよりも小さい時のa2をA21とし、外気温度がGaよりも大きい時のa2をA22とすると、A21とA22との間にはA21<A22の関係が成り立つ。 The a2 when the outside air temperature is lower than Ga and A21, when the a2 when the outside air temperature is greater than Ga and A22, between the A21 and A22 satisfy the relationship of A21 <A22.

これは、外気温度が低いと室外熱交換器10において冷媒温度と外気温度との温度差が確保することができるので、より少ない運転電流値で空気調和機を運転できるため、冷凍サイクルの異常を判断する運転電流設定値a2も外気温度に応じて異ならせることで、正確な冷凍サイクルの状態を検知することができる。 Since this can be a temperature difference between the refrigerant temperature and the outside air temperature in the outdoor heat exchanger 10 and the outside air temperature is low to ensure, since it operated the air conditioner with less operating current, the abnormality of the refrigeration cycle operating current setting value a2 to determine also by varying depending on the outside air temperature, it is possible to detect the state of the correct refrigeration cycle.

なお、本実施の形態では運転電流設定値a2を2段階に分けて制御を行ったが、これに限定されることはなく、2段階以上の複数段階に分けて制御を行っても良い。 Incidentally, in the present embodiment, control is carried out by dividing the driving current set value a2 in two steps, it is not limited thereto, may be controlled in a plurality stages of two or more stages. その場合は、より正確な冷凍サイクルの異常判断を行うことができる。 In that case, it is possible to perform more accurate refrigerating cycle abnormality judgment.

(実施の形態3) (Embodiment 3)
実施の形態3における空気調和機の回路図は、実施の形態1と同様であるため、実施の形態1と同じ符号を付して説明を省略する。 Circuit diagram of an air conditioner in Embodiment 3 is the same as in the first embodiment, its description is omitted with the same reference numerals as in the first embodiment. 次に、図5のフローチャートに従って、本実施の形態における空気調和機の制御を説明する まず、ステップ1で空気調和機の運転がスタートすると、ステップ2では圧縮機8が運転しているかどうかを判断する。 Next, determination according to the flowchart of FIG. 5, illustrating the control of the air conditioner of the present embodiment, the operation of the air conditioner is started in step 1, whether the compressor 8 in step 2 is operating to. ステップ2で圧縮機8が運転している場合は、ステップ3に移る。 Step 2 If the compressor 8 is in operation, the process proceeds to step 3.

ステップ3では室外制御装置13で時間を計測するタイマーカウンターをリセットし、ステップ3からの運転時間T1を計測する。 Resets the timer counter for measuring time in step 3 in the outdoor controller 13, measures the operating time T1 from step 3.

そしてステップ4へ移り、現状の膨張弁15の開度EXP、圧縮機8からの吐出温度Td、空気調和機の運転電流値Aを室外制御装置13に記憶する。 Then the routine goes to Step 4 to store opening EXP of the expansion valve 15 of the present situation, the discharge temperature Td of the compressor 8, the driving current value A of the air conditioner to the outdoor control unit 13.

そして、ステップ5で現在の膨張弁開度EXPが、予め設定されている設定値exp3より大きい場合、かつ、吐出温度センサ14で検出した冷媒の吐出温度Tdが、予め設定している吐出温度設定値t3よりも大きい場合、かつ、運転電流値Aが運転電流設定値a3より小さい場合は、ステップ6へ移り、条件を満たさない場合はステップ3へ戻る。 The current expansion valve EXP in step 5 is larger than the set value exp3 which is set in advance, and the discharge temperature Td of the refrigerant detected by the discharge temperature sensor 14, the discharge temperature settings preset If greater than the value t3, and, when the operating current value a is operating current less than the set value a3, the sequence proceeds to step 6, if the condition is not satisfied returns to step 3.

そして、ステップ6ではステップ3からの運転時間T1が予め設定されている所定時間Ts3以上経過したかどうかを判断し、経過していなければステップ4へ戻り、経過しているとステップ7で圧縮機の運転を停止する。 Then, it is determined whether a predetermined time has elapsed Ts3 than the operating time T1 from step 3 step 6 is set in advance, when not reached returns to Step 4, passed to have the compressor in step 7 to stop the operation. これは、圧縮機の吐出温度が安定するであろう所定時間Ts3を実験等で求めておき、冷凍サイクルの異常の判断に用いる吐出温度として、安定時の吐出温度を確実に用いることができ、より正確な冷媒状態を検出することができる。 This predetermined time Ts3 that would discharge temperature of the compressor is stabilized advance determined by experiments or the like, as the discharge temperature to be used for abnormality determination of the refrigeration cycle, it is possible to use a discharge temperature of the stable state with certainty, it is possible to detect a more accurate refrigerant state.

このように本実施の形態では、より正確に冷凍サイクルの異常を判断でき、モータのコイル、圧縮機構部を過昇温から保護することができる。 Thus in this embodiment, it can be determined more accurately refrigeration cycle abnormalities, motor coil, a compression mechanism portion can be protected from excessive temperature rise.

なお、実施の形態1〜3における所定値exp1、exp2、exp3、t1、t2、t3、a1、a2、a3、Hz2、Ts3は、実験等から決定された値であり、一義的に決定されるものではない。 The predetermined value exp1, exp2, exp3, t1, t2, t3, a1, a2, a3, Hz2, Ts3 in the first to third embodiments is a value determined from experiment or the like, is uniquely determined not. すなわち、空気調和機の構成に応じて、それぞれの所定値を変更することは問題はない。 That is, depending on the configuration of the air conditioner, there is no problem to change the respective predetermined values.

本発明にかかる空気調和機は、室内ユニットと室外ユニットに分離した分離型空気調和機の制御に最適である。 Air conditioner according to the present invention is most suitable for the control of the separate indoor unit and an outdoor unit separation-type air conditioner.

1 室内ユニット 2 室外ユニット 3 室内熱交換器 4 室内ファン 5 室内ファンモータ 6 室内温度センサ 7 室内制御装置 8 圧縮機 9 四方弁 10 室外熱交換器 11 室外温度センサ 12 室外ファン 13 室外制御装置 14 吐出温度センサ 15 電動膨張弁 1 indoor unit 2 the outdoor unit 3 indoor heat exchanger 4 indoor fan 5 indoor fan motor 6 indoor temperature sensor 7 indoor control unit 8 compressor 9 four-way valve 10 outdoor heat exchanger 11 outdoor temperature sensor 12 outdoor fan 13 outdoor control unit 14 discharge temperature sensor 15 electric expansion valve

Claims (4)

  1. 圧縮機、四方弁、室外側熱交換器、流量可変型の膨張弁、室内側熱交換器の順に環状に接続して形成された冷凍サイクルと、前記冷凍サイクルの吐出温度を検出する吐出温度検出手段と、前記流量可変型の膨張弁の絞り開度と吐出温度を記憶する記憶手段と、空気調和機の運転電流値を検出し記憶する運転電流値記憶手段とを備えた空気調和機であって、前記膨張弁の絞り開度が設定値以上で、かつ前記吐出温度検出手段で検出される吐出温度が吐出温度設定値以上で、かつ空気調和機の運転電流値が運転電流設定値以下の場合に、前記圧縮機の運転を停止させることを特徴とする空気調和機。 Compressor, four-way valve, an outdoor heat exchanger, a flow rate-variable expansion valve, and a refrigeration cycle formed by annularly connecting in the order of the indoor side heat exchanger, the discharge temperature detector for detecting the discharge temperature of the refrigeration cycle there in means and said variable flow-type storage means for storing the opening and the discharge temperature throttle of the expansion valve, an air conditioner and a driving current value storage means for detecting and storing the operating current of the air conditioner Te, in throttle opening degree of the expansion valve setting value or more, and the by the discharge temperature detected by the discharge temperature detecting means discharge temperature set value or more, and the operating current of the air conditioner is operating current setpoint following when the air conditioner, characterized in that stops the operation of the compressor.
  2. 前記圧縮機の周波数を検出し記憶する周波数検出手段を備え、前記圧縮機の周波数が所定の周波数以上の時のみ請求項1に記載の制御を行う空気調和機。 Wherein comprising a frequency detecting means for detecting storing the frequency of the compressor, an air conditioner for controlling according to only Claim 1 when the frequency of the compressor is higher than a predetermined frequency.
  3. 前記運転電流設定値は、外気温度に応じて2段階以上に運転電流設定値を設けていることを特徴とする請求項1または2に記載の空気調和機。 The driving current setting value, an air conditioner according to claim 1 or 2, characterized in that is provided with the driving current set value in two or more stages depending on the ambient temperature.
  4. 前記膨張弁の絞り開度が設定値以上で、かつ前記吐出温度検出手段で検出される吐出温度が所定時間の間、吐出温度設定値以上で、かつ空気調和機の運転電流値が運転電流設定値以下の場合に、前記圧縮機を停止させることを特徴とする請求項1から3のいずれか1項に記載の空気調和機。 In throttle opening degree of the expansion valve setting value or more, and during said discharge temperature detected by the discharge temperature detecting means for a predetermined time at a discharge temperature set value or more, and the operating current set operating current of the air conditioner If the value below the air conditioner according to any one of claims 1 to 3, characterized in that stops the compressor.
JP2010018177A 2010-01-29 2010-01-29 Air conditioner Pending JP2011158121A (en)

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Publication number Priority date Publication date Assignee Title
CN103807982A (en) * 2012-11-07 2014-05-21 珠海格力电器股份有限公司 Air conditioner
JP2015045487A (en) * 2013-08-29 2015-03-12 三菱電機株式会社 Air conditioner

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JPS57116188A (en) * 1981-01-09 1982-07-20 Hitachi Ltd Air conditioner
JPS57147915A (en) * 1981-03-11 1982-09-13 Hitachi Ltd Detection device of refrigerant leakage in car air conditioner
JPH0455671A (en) * 1990-06-26 1992-02-24 Toshiba Corp Refrigerating cycle device
JPH055564A (en) * 1991-06-28 1993-01-14 Toshiba Corp Air conditioner
JPH0868576A (en) * 1994-08-31 1996-03-12 Daikin Ind Ltd Refrigerator
JPH08128765A (en) * 1994-10-31 1996-05-21 Matsushita Electric Ind Co Ltd Compressor protective controller for air conditioner
JP2003222449A (en) * 2002-01-30 2003-08-08 Daikin Ind Ltd Heat pump device

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Publication number Priority date Publication date Assignee Title
JPS57116188A (en) * 1981-01-09 1982-07-20 Hitachi Ltd Air conditioner
JPS57147915A (en) * 1981-03-11 1982-09-13 Hitachi Ltd Detection device of refrigerant leakage in car air conditioner
JPH0455671A (en) * 1990-06-26 1992-02-24 Toshiba Corp Refrigerating cycle device
JPH055564A (en) * 1991-06-28 1993-01-14 Toshiba Corp Air conditioner
JPH0868576A (en) * 1994-08-31 1996-03-12 Daikin Ind Ltd Refrigerator
JPH08128765A (en) * 1994-10-31 1996-05-21 Matsushita Electric Ind Co Ltd Compressor protective controller for air conditioner
JP2003222449A (en) * 2002-01-30 2003-08-08 Daikin Ind Ltd Heat pump device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103807982A (en) * 2012-11-07 2014-05-21 珠海格力电器股份有限公司 Air conditioner
JP2015045487A (en) * 2013-08-29 2015-03-12 三菱電機株式会社 Air conditioner

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