JP3867490B2

JP3867490B2 - Air conditioner control device

Info

Publication number: JP3867490B2
Application number: JP2000296288A
Authority: JP
Inventors: 壽士平谷; 茂成相; 輝夫藤社; 護竹内
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2000-09-28
Filing date: 2000-09-28
Publication date: 2007-01-10
Anticipated expiration: 2020-09-28
Also published as: JP2002106918A

Description

【０００１】
【発明の属する技術分野】
本発明は、再熱除湿運転時に室内湿度に対応して圧縮機運転周波数もしくは膨張弁開度もしくは室外ファン回転数を自動的に変更する露付防止運転機能を有する空気調和機の制御装置に関する。
【０００２】
【従来の技術】
従来の再熱除湿運転を有する空気調和機においては、室内の温度と使用者がリモコンで設定した室内の目標温度との差が大きい場合は、目標温度に到達するまで室内湿度や運転連続時間に関わらず高い圧縮機運転周波数で運転を続けていた。
【０００３】
【発明が解決しようとする課題】
しかし、室内湿度が高い状態で長時間運転を続けた場合、蒸発器の温度が下がり、蒸発器下部の吹き出し部、ファン部等に結露が生じ、室内機吹出し口からの水の飛び出しや滴下が発生するという問題があった。
【０００４】
【課題を解決するための手段】
本発明の第１の形態は、室内湿度検出手段と計時手段と圧縮機運転周波数変更手段を含み室内機に凝縮器と蒸発器を接続し再熱除湿運転が可能な空気調和器の制御装置において、室内湿度検出手段で検出される室内湿度が所定の湿度（ψin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機運転周波数変更手段により所定の周波数（Ｆ１）に変更し露付防止運転することを特徴とする。
【０００５】
また室内湿度（ψin）のみならず室内温度検出手段で検出される室内温度（Ｔin）以上でかつ室内湿度が所定の湿度（ψin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機運転周波数変更手段により所定の周波数（Ｆ１）に変更し露付防止運転するようにしてもよい。
【０００６】
また室内湿度（ψin）、室内温度（Ｔin）のみならず室外温度検出手段で検出される室外温度が所定の温度（Ｔout）以下でかつ室内湿度が所定の湿度（ψin）以上でかつ上記室内温度が所定の温度（Ｔin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機運転周波数変更手段により所定の周波数（Ｆ１）に変更し露付防止運転するようにしてもよい。
【０００７】
さらに運転周波数を所定の周波数（Ｆ１）に変更するのみならず、室内蒸発器温度検出手段で検出される室内蒸発器温度が所定の温度（Ｔev）以上となるまで段階的に周波数を変更し露付防止運転するようにしてもよい。
【０００８】
本発明の第２の形態は、膨張弁開度変更手段を含み、所定の時間（ｔ１）以上経過後に、絞り変更手段により所定の絞り（Ａpls）に変更し、露付防止運転することを特徴とする。
【０００９】
また膨張弁開度変更手段により所定の開度（Ａpls）に変更するのみならず、室内蒸発器温度検出手段で検出される室内蒸発器温度が所定の温度（Ｔev）以上となるまで段階的に膨張弁開度を変更し露付防止運転するようにしてもよい。
【００１０】
本発明の第３の形態は、室外ファン回転数変更手段を含み、所定の時間（ｔ１）以上経過後に、室外ファン回転数変更手段により所定の室外ファン回転数（Ｂrpm）に変更し、露付防止運転することを特徴とする。
【００１１】
また室外ファン回転数変更手段により所定の室外ファン回転数（Ｂrpm）に変更するのみならず、室内凝縮器温度検出手段により検出された凝縮器温度が所定の温度（Ｔcd）以上となるまで室外ファン回転数変更手段により段階的に変更し、露付防止運転するようにしてもよい。
【００１２】
【発明の実施の形態】
以下、添付図面を参照して本発明の実施の形態について説明する。
【００１３】
図２は再熱除湿運転が可能な空気調和器を示す。空気調和機は、概略、空調すべき空間に配置されている室内機１と、屋外に配置された室外機２と、熱媒体の循環路３とを有している。
【００１４】
室内機１は、凝縮器４と、絞り機構５と、蒸発器６と、凝縮器温度を検出する凝縮器温度センサ７と、蒸発器温度を検出する蒸発器温度センサ８と、室内温度を検出する室内温度センサ９と、室内湿度を検出する室内湿度センサ１０と、風量調整可能な室内ファン１１を有する。
【００１５】
さらに、室内機１は、凝縮器温度センサ７が検出した凝縮器温度と、蒸発器温度センサ８が検出した蒸発器温度と、室内温度センサ９が検出した室内温度と、室内湿度センサ１０が検出した室内湿度と、室外温度センサ１２が検出した室外温度の情報とをもとに空気調和機を制御する本体制御部（図３参照）とを有する。
【００１６】
室外機２は、室外熱交換器１３と室外温度を検出する室外温度センサ１２、熱媒体の圧力を変化させる膨張弁１４と、冷房運転と暖房運転とで熱媒体の流れを切り替える四方弁１５、および熱媒体を圧縮する圧縮機１６、風量調整可能な室外ファン１７を有している。
【００１７】
図３は、本発明の実施の形態における空気調和機の制御回路を示すブロック図である。
【００１８】
この制御回路において、本体制御部１８では、室内温度検出手段である室内温度センサ９と、室内湿度検出手段である室内湿度センサ１０と、室内凝縮器温度検出手段である凝縮器温度制センサ７と、室内蒸発器温度検出手段である蒸発器温度センサ８および室外温度検出手段である室外温度センサ１２で検出された各温度情報と計時手段であるタイマ１９にて計時した情報が中央制御部２０へ送信され、中央制御部２０はこれらの入力情報と、テーブル記憶部２１にあらかじめ記憶された圧縮機周波数、膨張弁開度および室外ファン回転数に基づき、圧縮機１６、膨張弁１４、室外ファンを駆動するための制御信号を各々圧縮機運転周波数変更手段（図示せず）、膨張弁開度変更手段（図示せず）、室外ファン回転数変更手段（図示せず）に送るように構成されている。
【００１９】
図１のフローチャートを参照しながら露付き防止運転を説明する。図示しない運転制御部により再熱除湿運転が開始する（Ｓ１）とスッテプＳ２でタイマ１９により計時を開始する（ｔ＝0）。
【００２０】
ステップＳ３で中央制御部２０は、室内温度センサ９により室内温度（Ｔin）を室内湿度センサ１０により室内湿度（φin）を室外温度センサ１２により室外温度（Ｔout）を検出する。
【００２１】
ステップＳ４で中央制御部２０はテーブル記憶部２１にあらかじめ記憶しておいた室内温度（Ｔin）に関する所定の第１基準温度（ＴＳ１、例えば２７℃）と検出された室内温度（Ｔin）を比較し、同様に室内湿度（ψin）に関する所定の基準湿度（ψＳ、例えば８０％）と検出された室内湿度（ψin）を比較し、室外温度（Ｔout）に関する所定の第２基準温度（ＴＳ２、例えば３０℃）と検出された室外温度（Ｔout）を比較した結果、室内温度（Ｔin）が第１基準温度（ＴＳ１、２７℃）以上で、かつ、室内湿度（ψin）が基準湿度（ψＳ、８０％）以上で、かつ、室外温度（Ｔout）が第２基準温度（ＴＳ２、３０℃）以下である場合に限って、ステップＳ６でタイマ１９により計時する（ｔ＝ｔ１）。上記以外の場合はステップＳ３でタイマ１９により計時を再度開始する（ｔ＝0）。
【００２２】
ステップＳ６で中央制御部２０はタイマ１９で計時した時間（ｔ１）があらかじめ記憶しておいた時間（ｔ）に関する所定の基準時間（ｔｓ、例えば６０分）と検出された時間（ｔ１）を比較し、時間（ｔ）が基準時間（ｔｓ、例えば６０分）以上の場合はステップＳ７以下の処理を行いそれ以外の場合はステップＳ３以下の処理を行う。ステップＳ７で中央制御部２０は圧縮機１６の運転周波数（Ｆ）をあらかじめ記憶しておいた周波数（ＦＳ、例えば２１Ｈｚ）に変更し運転する。
【００２３】
ステップＳ８で中央制御部２０は、蒸発器温度センサ８により蒸発器温度（Ｔev）を凝縮器温度センサ７により凝縮器（Ｔcd）を検出する。
【００２４】
ステップＳ９で中央制御部２０はテーブル記憶部２１にあらかじめ記憶しておいた蒸発器温度（Ｔev）に関する所定の第３基準温度（ＴＳ３、例えば１２℃）と検出された蒸発器温度（Ｔev）を比較した結果、蒸発器温度（Ｔev）が第３基準温度（ＴＳ３、１２℃）以上である場合に限って、ステップＳ１０で膨張弁１４の開度（Ａ）を例えば６パルス加算し、ステップ９以下の処理を行う。上記の場合以外はステップ１１以下の処理を行う。
【００２５】
ステップＳ１１で中央制御部２０はテーブル記憶部２１にあらかじめ記憶しておいた凝縮器温度（Ｔcd）に関する所定の第４基準温度（ＴＳ４、例えば２８℃）と検出された凝縮器温度（Ｔcd）を比較した結果、凝縮器温度（Ｔcd）が第４基準温度（ＴＳ４、２８℃）以上である場合に限って、ステップＳ１２で室外ファン１７の回転数（Ｂ）を例えば２０回転加算し、ステップ１１以下の処理を行う。
【００２６】
上記の場合以外は図示していない運転制御部より指示があるまで従来の運転を継続する。以上説明したように再熱除湿運転時、室内機の吹き出し部周辺、上下偏向羽根、左右偏向羽根、ファン部等に結露が発生し易い状態で長時間運転を続けた場合、圧縮機運転周波数もしくは膨張弁開度もしくは室外ファン回転数を自動的に変更し運転制御するため、室内機の露付を防止することができる。
【００２７】
【発明の効果】
上記説明から明らかなように、請求項第１項に記載の本発明は、室内湿度が高い状態で長時間再熱除湿運転を続けた場合に空気調和器が室内湿度を検出し、この室内湿度が所定の湿度（ψin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機の運転周波数を所定の周波数（Ｆ１）に変更し、室内蒸発器温度を上げて運転する。したがって蒸発器下部の室内吹き出し部の結露を抑制することができる。
【００２８】
また請求項第２項に記載の本発明は、室内湿度と同様に室内温度も検出し、この室内温度が所定の温度（Ｔin）以上でかつ室内湿度が所定の湿度（ψin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機の運転周波数を所定の周波数（Ｆ１）に変更し、室内蒸発器温度を上げて運転するのでさらに適切な露付防止運転をすることができる。
【００２９】
また、請求項第３項に記載の本発明は、室内湿度と室内温度と同様に室外温度も検出し、この室外温度が所定の温度（Ｔout）以下でかつ室内温度が所定の温度（Ｔin）以上でかつ室内湿度が所定の湿度（ψin）以上と成ってから計時手段によって計時される時間が所定の時間（ｔ１）以上経過した場合には、圧縮機の運転周波数を所定の周波数（Ｆ１）に変更し、室内蒸発器温度を上げて運転するのでさらに適切な露付防止運転をすることができる。
【００３０】
また、請求項第４項に記載の本発明は、室内蒸発器温度検出手段で検出される室内蒸発器温度が所定の温度（Ｔev）以上となるまで段階的に圧縮機運転周波数を変更するので蒸発器下部の室内吹き出し部の結露が抑制できる蒸発器の温度まで上げるのでさらに適切な露付防止運転することができる。
【００３１】
さらに請求項第５項に記載の本発明は、膨張弁の開度を所定の開度（Ａpls）に変更し、凝縮器の温度を上げさらに蒸発器の温度を上げて運転する。したがって室内ファン部および蒸発器下部の吹き出し部の結露を抑制することができる。
【００３２】
また請求項第６項に記載の本発明は、室内蒸発器温度検出手段で検出される室内蒸発器温度が所定の温度（Ｔev）以上となるまで段階的に膨張弁開度を変更するので蒸発器下部の室内吹き出し部の結露が抑制できる蒸発器の温度まで上げるのでさらに適切な露付防止運転することができる。
【００３３】
さらに請求項第７項に記載の本発明は、室外ファンの回転数を所定の回転数（Ｂrpm）に変更し、凝縮器の温度を上げて運転する。したがって室内ファン部および蒸発器下部の吹き出し部の結露を抑制することができる。
【００３４】
また請求項第８項に記載の本発明は、室内凝縮器温度検出手段で検出される室内凝縮器温度が所定の温度（Ｔcd）以上となるまで段階的に室外ファン回転数を変更するので室内ファン部の結露が抑制できる凝縮器の温度まで上げるのでさらに適切な露付防止運転することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態における空気調和機の露付防止運転時の制御方法を示すフローチャート
【図２】同空気調和機の構成図
【図３】同空気調和機の制御回路を示すブロック図
【符号の説明】
１室内機
２室外機
３循環路
４凝縮器
５絞り機構
６蒸発器
７凝縮器温度センサ（室内凝縮器温度検出手段）
８蒸発器温度センサ（室内蒸発器温度検出手段）
９室内温度センサ（室内温度検出手段）
１０室内湿度センサ（室内湿度検出手段）
１１室内ファン
１２室外温度センサ
１３室外熱交換器
１４膨張弁
１５四方弁
１６圧縮機
１７室外ファン
１８本体制御部
１９タイマ
２０中央制御部
２１テーブル記憶部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for an air conditioner having a dew prevention operation function that automatically changes a compressor operating frequency, an expansion valve opening degree, or an outdoor fan rotation speed in accordance with indoor humidity during a reheat dehumidifying operation.
[0002]
[Prior art]
In an air conditioner having a conventional reheat dehumidifying operation, if there is a large difference between the indoor temperature and the indoor target temperature set by the user using the remote controller, the indoor humidity and the continuous operation time are reached until the target temperature is reached. Despite this, it continued to operate at a high compressor operating frequency.
[0003]
[Problems to be solved by the invention]
However, if the operation is continued for a long time with the room humidity being high, the temperature of the evaporator will drop, condensation will form on the blowout part, fan part, etc. at the bottom of the evaporator, and water will be ejected or dripped from the indoor unit outlet. There was a problem that occurred.
[0004]
[Means for Solving the Problems]
A first aspect of the present invention is an air conditioner control apparatus that includes an indoor humidity detecting means, a timekeeping means, and a compressor operating frequency changing means, wherein a condenser and an evaporator are connected to the indoor unit and a reheat dehumidifying operation is possible. When the time measured by the time measuring means after the indoor humidity detected by the indoor humidity detecting means becomes equal to or higher than the predetermined humidity (ψin), the compressor operating frequency changing means By changing the frequency to a predetermined frequency (F1), dew prevention operation is performed.
[0005]
Further, not only the room humidity (ψin) but also the room temperature (Tin) detected by the room temperature detecting means or more, and the time measured by the time measuring means after the room humidity reaches the predetermined humidity (ψin) or more is a predetermined time. When (t1) or more has passed, the compressor operation frequency changing means may change the frequency to a predetermined frequency (F1) and perform the dew prevention operation.
[0006]
In addition to the indoor humidity (ψin) and the indoor temperature (Tin), the outdoor temperature detected by the outdoor temperature detecting means is not more than a predetermined temperature (Tout), the indoor humidity is not less than the predetermined humidity (ψin), and the indoor temperature is When the time measured by the time measuring means after the temperature reaches the predetermined temperature (Tin) or more has passed the predetermined time (t1), the compressor operating frequency changing means changes the frequency to the predetermined frequency (F1). You may make it carry out a sticking prevention driving | operation.
[0007]
Further, not only the operating frequency is changed to the predetermined frequency (F1), but also the frequency is changed stepwise until the indoor evaporator temperature detected by the indoor evaporator temperature detecting means becomes equal to or higher than the predetermined temperature (Tev). You may make it carry out a sticking prevention driving | operation.
[0008]
The second embodiment of the present invention includes an expansion valve opening changing means, and after a predetermined time (t1) or more has elapsed, the throttle changing means changes the throttle to a predetermined throttle (Apls) and performs an anti-dew condensation operation. And
[0009]
Further, not only the expansion valve opening changing means changes to a predetermined opening degree (Apls) but also stepwise until the indoor evaporator temperature detected by the indoor evaporator temperature detecting means becomes equal to or higher than the predetermined temperature (Tev). The expansion valve opening degree may be changed to perform the dew prevention operation.
[0010]
The third aspect of the present invention includes an outdoor fan rotation speed changing means, and after a predetermined time (t1) or more has elapsed, the outdoor fan rotation speed changing means changes the predetermined outdoor fan rotation speed (Brpm) to the exposure. It is characterized by preventing operation.
[0011]
Further, the outdoor fan speed is not only changed to the predetermined outdoor fan speed (Brpm) by the outdoor fan speed changing means, but also the outdoor fan until the condenser temperature detected by the indoor condenser temperature detecting means becomes equal to or higher than the predetermined temperature (Tcd). It may be changed stepwise by the rotation speed changing means, and the dew prevention operation may be performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0013]
FIG. 2 shows an air conditioner capable of reheat dehumidification operation. The air conditioner generally includes an indoor unit 1 arranged in a space to be air-conditioned, an outdoor unit 2 arranged outdoors, and a heat medium circulation path 3.
[0014]
The indoor unit 1 includes a condenser 4, a throttle mechanism 5, an evaporator 6, a condenser temperature sensor 7 that detects the condenser temperature, an evaporator temperature sensor 8 that detects the evaporator temperature, and a room temperature. An indoor temperature sensor 9 for detecting indoor humidity, an indoor humidity sensor 10 for detecting indoor humidity, and an indoor fan 11 capable of adjusting the air volume.
[0015]
Further, the indoor unit 1 is detected by the condenser temperature detected by the condenser temperature sensor 7, the evaporator temperature detected by the evaporator temperature sensor 8, the indoor temperature detected by the indoor temperature sensor 9, and the indoor humidity sensor 10. A main body control unit (see FIG. 3) that controls the air conditioner based on the indoor humidity and the outdoor temperature information detected by the outdoor temperature sensor 12.
[0016]
The outdoor unit 2 includes an outdoor heat exchanger 13 and an outdoor temperature sensor 12 that detects the outdoor temperature, an expansion valve 14 that changes the pressure of the heat medium, and a four-way valve 15 that switches the flow of the heat medium between the cooling operation and the heating operation. And a compressor 16 for compressing the heat medium and an outdoor fan 17 capable of adjusting the air volume.
[0017]
FIG. 3 is a block diagram showing a control circuit of the air conditioner according to the embodiment of the present invention.
[0018]
In this control circuit, the main body control unit 18 includes an indoor temperature sensor 9 that is an indoor temperature detection means, an indoor humidity sensor 10 that is an indoor humidity detection means, and a condenser temperature control sensor 7 that is an indoor condenser temperature detection means. The temperature information detected by the evaporator temperature sensor 8 as the indoor evaporator temperature detecting means and the outdoor temperature sensor 12 as the outdoor temperature detecting means and the information measured by the timer 19 as the time measuring means are sent to the central control unit 20. The central control unit 20 transmits the compressor 16, the expansion valve 14, and the outdoor fan based on the input information and the compressor frequency, the expansion valve opening degree, and the outdoor fan rotational speed stored in advance in the table storage unit 21. Control signals for driving are respectively compressor operating frequency changing means (not shown), expansion valve opening changing means (not shown), outdoor fan rotation speed changing means (not shown). And to send.
[0019]
The dew prevention operation will be described with reference to the flowchart of FIG. When the reheat dehumidifying operation is started by an operation control unit (not shown) (S1), the timer 19 starts measuring time at step S2 (t = 0).
[0020]
In step S <b> 3, the central control unit 20 detects the indoor temperature (Tin) by the indoor temperature sensor 9, the indoor humidity (φin) by the indoor humidity sensor 10, and the outdoor temperature (Tout) by the outdoor temperature sensor 12.
[0021]
In step S4, the central control unit 20 compares the detected indoor temperature (Tin) with a predetermined first reference temperature (TS1, for example, 27 ° C.) related to the indoor temperature (Tin) stored in the table storage unit 21 in advance. Similarly, a predetermined reference humidity (ψS, for example, 80%) regarding the indoor humidity (ψin) is compared with the detected indoor humidity (ψin), and a predetermined second reference temperature (TS2, for example, 30) for the outdoor temperature (Tout) is compared. As a result of comparing the detected outdoor temperature (Tout) with the room temperature (Tin) is equal to or higher than the first reference temperature (TS1, 27 ° C), and the indoor humidity (ψin) is the reference humidity (ψS, 80%) ) Only when the outdoor temperature (Tout) is equal to or lower than the second reference temperature (TS2, 30 ° C.), the timer 19 measures time in step S6 (t = t1). In cases other than the above, the timer 19 starts counting again at step S3 (t = 0).
[0022]
In step S6, the central control unit 20 compares the detected time (t1) with a predetermined reference time (ts, for example, 60 minutes) related to the time (t) stored in advance by the time (t1) measured by the timer 19. If the time (t) is equal to or longer than the reference time (ts, for example, 60 minutes), the process after step S7 is performed. Otherwise, the process after step S3 is performed. In step S7, the central control unit 20 changes the operation frequency (F) of the compressor 16 to a previously stored frequency (FS, for example, 21 Hz) and operates.
[0023]
In step S <b> 8, the central control unit 20 detects the evaporator temperature (Tev) by the evaporator temperature sensor 8 and the condenser (Tcd) by the condenser temperature sensor 7.
[0024]
In step S9, the central control unit 20 uses the predetermined third reference temperature (TS3, for example, 12 ° C.) and the detected evaporator temperature (Tev) related to the evaporator temperature (Tev) stored in advance in the table storage unit 21. As a result of the comparison, only when the evaporator temperature (Tev) is equal to or higher than the third reference temperature (TS3, 12 ° C.), for example, six pulses of the opening degree (A) of the expansion valve 14 are added in step S10. The following processing is performed. Except for the above case, the processing from step 11 is performed.
[0025]
In step S11, the central control unit 20 uses a predetermined fourth reference temperature (TS4, for example, 28 ° C.) related to the condenser temperature (Tcd) stored in advance in the table storage unit 21 and the detected condenser temperature (Tcd). As a result of the comparison, only when the condenser temperature (Tcd) is equal to or higher than the fourth reference temperature (TS4, 28 ° C.), the number of rotations (B) of the outdoor fan 17 is added, for example, 20 rotations in step S12. The following processing is performed.
[0026]
Except for the above case, the conventional operation is continued until an instruction is given from an operation control unit (not shown). As described above, during reheat dehumidification operation, if the operation is continued for a long time in a state where condensation is likely to occur around the blowout part of the indoor unit, the upper and lower deflection blades, the left and right deflection blades, the fan part, etc., the compressor operating frequency or Since the expansion valve opening degree or the outdoor fan rotation speed is automatically changed and the operation is controlled, it is possible to prevent the indoor unit from being exposed.
[0027]
【The invention's effect】
As is clear from the above description, the present invention according to claim 1 is that the air conditioner detects the indoor humidity when the reheat dehumidifying operation is continued for a long time in a state where the indoor humidity is high, and this indoor humidity When the time measured by the time measuring means after the temperature reaches the predetermined humidity (ψin) or more has passed the predetermined time (t1), the operating frequency of the compressor is changed to the predetermined frequency (F1) Increase the evaporator temperature and operate. Therefore, the dew condensation in the indoor blowing section below the evaporator can be suppressed.
[0028]
According to the second aspect of the present invention, the indoor temperature is detected in the same manner as the indoor humidity, the indoor temperature is equal to or higher than a predetermined temperature (Tin), and the indoor humidity is equal to or higher than a predetermined humidity (ψin). If the time measured by the time counting means exceeds a predetermined time (t1), the operation frequency of the compressor is changed to the predetermined frequency (F1), and the operation is performed by raising the indoor evaporator temperature. It is possible to perform a proper dew-proof operation.
[0029]
According to the third aspect of the present invention, the outdoor temperature is detected as well as the indoor humidity and the indoor temperature, the outdoor temperature is equal to or lower than a predetermined temperature (Tout), and the indoor temperature is a predetermined temperature (Tin). If the time measured by the time measuring unit after the indoor humidity becomes equal to or higher than the predetermined humidity (ψin) exceeds the predetermined time (t1), the operating frequency of the compressor is set to the predetermined frequency (F1). Since the operation is performed by raising the indoor evaporator temperature, it is possible to perform a more appropriate dew prevention operation.
[0030]
In the fourth aspect of the present invention, the compressor operating frequency is changed stepwise until the indoor evaporator temperature detected by the indoor evaporator temperature detecting means becomes equal to or higher than a predetermined temperature (Tev). Since it raises to the temperature of the evaporator which can suppress the dew condensation of the indoor blowing part in the lower part of an evaporator, it can operate further more appropriately with dew prevention.
[0031]
Further, the present invention according to claim 5 operates by changing the opening of the expansion valve to a predetermined opening (Apls), raising the temperature of the condenser and raising the temperature of the evaporator. Therefore, it is possible to suppress dew condensation on the indoor fan part and the blowing part below the evaporator.
[0032]
Further, according to the sixth aspect of the present invention, the expansion valve opening is gradually changed until the indoor evaporator temperature detected by the indoor evaporator temperature detecting means becomes equal to or higher than a predetermined temperature (Tev). Since it raises to the temperature of the evaporator which can suppress dew condensation of the indoor blow-off part of the lower part of a vessel, it can operate more appropriately.
[0033]
Further, according to the seventh aspect of the present invention, the rotational speed of the outdoor fan is changed to a predetermined rotational speed (Brpm), and the condenser is operated at an increased temperature. Therefore, it is possible to suppress dew condensation on the indoor fan part and the blowing part below the evaporator.
[0034]
According to the eighth aspect of the present invention, the outdoor fan rotational speed is changed stepwise until the indoor condenser temperature detected by the indoor condenser temperature detecting means becomes equal to or higher than a predetermined temperature (Tcd). Since it raises to the temperature of the condenser which can suppress dew condensation of a fan part, more suitable dew prevention operation can be performed.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a control method during a dew preventing operation of an air conditioner in an embodiment of the present invention. FIG. 2 is a block diagram of the air conditioner. FIG. 3 is a control circuit of the air conditioner. Block diagram [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Outdoor unit 3 Circulation path 4 Condenser 5 Throttle mechanism 6 Evaporator 7 Condenser temperature sensor (indoor condenser temperature detection means)
8 Evaporator temperature sensor (indoor evaporator temperature detection means)
9 Indoor temperature sensor (Indoor temperature detection means)
10 Indoor humidity sensor (Indoor humidity detection means)
DESCRIPTION OF SYMBOLS 11 Indoor fan 12 Outdoor temperature sensor 13 Outdoor heat exchanger 14 Expansion valve 15 Four-way valve 16 Compressor 17 Outdoor fan 18 Main body control part 19 Timer 20 Central control part 21 Table memory | storage part

Claims

In an air conditioner including an indoor humidity detecting means, a time measuring means, and a compressor operating frequency changing means, wherein a condenser and an evaporator are connected to the indoor unit and reheat dehumidifying operation is possible, the indoor humidity detecting means detects When the time measured by the time measuring means has exceeded the predetermined time (t1) after the indoor humidity to be reached becomes a predetermined humidity (ψin) or higher, the compressor operating frequency changing means changes the predetermined frequency. A control device for an air conditioner that is changed to (F1) and performs the dew-proof operation.

In an air conditioner including an indoor humidity detecting means, a timing means, a compressor operating frequency changing means, and an indoor temperature detecting means, wherein a condenser and an evaporator are connected to the indoor unit and a reheat dehumidifying operation is possible, When the indoor temperature detected by the indoor temperature detecting means is equal to or higher than a predetermined temperature (Tin) and the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin), the time is measured by the time measuring means. A control device for an air conditioner that performs a dew-proof operation by changing to a predetermined frequency (F1) by the compressor operating frequency changing means when a predetermined time (t1) has elapsed.

It includes indoor humidity detecting means, timing means, compressor operating frequency changing means, indoor temperature detecting means, and outdoor temperature detecting means. A condenser and an evaporator are connected to the indoor unit to enable reheat dehumidifying operation. In the air conditioner, the outdoor temperature detected by the outdoor temperature detecting means is equal to or lower than a predetermined temperature (Tout), the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin), and When the time measured by the time measuring means has exceeded the predetermined time (t1) after the room temperature detected by the room temperature detecting means has become equal to or higher than the predetermined temperature (Tin), the compressor is operated. A control apparatus for an air conditioner that performs a dew-proof operation by changing to a predetermined frequency (F1) by a frequency changing means.

It includes indoor humidity detection means, timing means, compressor operating frequency changing means, indoor temperature detection means, outdoor temperature detection means, and indoor evaporator temperature detection means. A condenser and an evaporator are connected to the indoor unit. In the air conditioner capable of reheating and dehumidifying operation, the time measured by the time measuring unit after the indoor humidity detected by the indoor humidity detecting unit becomes equal to or higher than a predetermined humidity (ψin) is a predetermined time (t1). )
Alternatively, when the indoor temperature detected by the indoor temperature detecting means is equal to or higher than a predetermined temperature (Tin) and the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin), the time measuring means After a predetermined time (t1) has elapsed, or the outdoor temperature detected by the outdoor temperature detecting means is equal to or lower than a predetermined temperature (Tout), and the indoor temperature detected by the indoor temperature detecting means is A predetermined time (t1) or more has elapsed since the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin) at a predetermined temperature (Tin) or higher. After that, the frequency is changed stepwise by the compressor operating frequency changing means until the indoor evaporator temperature detected by the indoor evaporator temperature detecting means becomes equal to or higher than a predetermined temperature (Tev) to prevent dew condensation. Control device for an air conditioner for rolling.

It includes indoor humidity detection means, timing means, indoor temperature detection means, outdoor temperature detection means, and expansion valve opening change means, and a condenser and an evaporator are connected to the indoor unit to enable reheat dehumidification operation. In the air conditioner, after the indoor humidity detected by the indoor humidity detecting means becomes equal to or higher than a predetermined humidity (ψin), the time measured by the time measuring means passes after a predetermined time (t1) or more or Time measured by the time measuring means after the room temperature detected by the temperature detecting means is not less than a predetermined temperature (Tin) and the room humidity detected by the room humidity detecting means is not less than the predetermined humidity (ψin). Is equal to or longer than a predetermined time (t1), or the outdoor temperature detected by the outdoor temperature detecting means is equal to or lower than a predetermined temperature (Tout), and the indoor temperature detected by the indoor temperature detecting means is a predetermined temperature ( (Tin) or more, and after the indoor time detected by the indoor humidity detecting means becomes equal to or higher than a predetermined humidity (ψin), the time measured by the time measuring means passes the predetermined time (t1). A control device for an air conditioner that is operated to prevent dew condensation by changing to a predetermined opening (Apls) by a valve opening changing means.

It includes indoor humidity detecting means, timing means, indoor temperature detecting means, outdoor temperature detecting means, indoor evaporator temperature detecting means, and expansion valve opening changing means, and a condenser and an evaporator are connected to the indoor unit. In the air conditioner capable of reheating and dehumidifying operation, the time measured by the time measuring unit after the indoor humidity detected by the indoor humidity detecting unit becomes equal to or higher than a predetermined humidity (ψin) is a predetermined time (t1). ) After the above or after the indoor temperature detected by the indoor temperature detecting means is equal to or higher than a predetermined temperature (Tin) and the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin). After a predetermined time (t1) has elapsed, or the outdoor temperature detected by the outdoor temperature detecting means is below a predetermined temperature (Tout) and detected by the indoor temperature detecting means. The time measured by the time measuring means after the room temperature detected by the indoor humidity detecting means becomes equal to or higher than the predetermined humidity (ψin) is a predetermined time (t1). ) After the above, the expansion valve opening degree change means changes the opening degree of the expansion valve stepwise until the indoor evaporator temperature detected by the indoor evaporator temperature detection means becomes a predetermined temperature (Tev) or more. A control device for an air conditioner that operates to prevent dew.

Includes indoor humidity detecting means, timing means, indoor temperature detecting means, outdoor temperature detecting means, and outdoor fan rotation speed changing means, and a condenser and an evaporator are connected to the indoor unit to enable reheat dehumidification operation. In the air conditioner, after the indoor humidity detected by the indoor humidity detecting means becomes equal to or higher than a predetermined humidity (ψin), the time measured by the time measuring means passes after a predetermined time (t1) or more or Time measured by the time measuring means after the room temperature detected by the temperature detecting means is not less than a predetermined temperature (Tin) and the room humidity detected by the room humidity detecting means is not less than the predetermined humidity (ψin). Is equal to or longer than a predetermined time (t1), or the outdoor temperature detected by the outdoor temperature detecting means is equal to or lower than a predetermined temperature (Tout) and the indoor temperature detected by the indoor temperature detecting means is a predetermined temperature. When the indoor time detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin) and the time measured by the time measuring means is equal to or longer than a predetermined time (t1), A control device for an air conditioner that performs an anti-dew condensation operation by changing to a predetermined outdoor fan rotational speed (Brpm) by an outdoor fan rotational speed changing means.

Indoor humidity detecting means, timing means, indoor temperature detecting means, outdoor temperature detecting means, outdoor fan rotation speed changing means, and indoor condensing temperature detecting means, and a condenser and an evaporator are connected to the indoor unit, In the air conditioner capable of reheating and dehumidifying operation, the time measured by the time measuring unit after the indoor humidity detected by the indoor humidity detecting unit becomes equal to or higher than a predetermined humidity (ψin) is a predetermined time (t1) After the elapse of time, or after the indoor temperature detected by the indoor temperature detecting means is equal to or higher than a predetermined temperature (Tin) and the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin), After an elapse of a predetermined time (t1) or a time measured by the time measuring means, or an outdoor temperature detected by the outdoor temperature detecting means is equal to or lower than a predetermined temperature (Tout) and the indoor temperature is a predetermined temperature (Tin) When the indoor humidity detected by the indoor humidity detecting means is equal to or higher than a predetermined humidity (ψin) and the time measured by the time measuring means is not less than a predetermined time (t1), the indoor condenser temperature Control device for an air conditioner that performs a dew-proof operation by changing stepwise by the outdoor fan rotation speed changing means until the indoor condenser temperature detected by the detecting means reaches a predetermined temperature (Tcd) or higher.