JP3306455B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3306455B2 JP3306455B2 JP04389393A JP4389393A JP3306455B2 JP 3306455 B2 JP3306455 B2 JP 3306455B2 JP 04389393 A JP04389393 A JP 04389393A JP 4389393 A JP4389393 A JP 4389393A JP 3306455 B2 JP3306455 B2 JP 3306455B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- evaporator
- electric expansion
- expansion valve
- air
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、大きな風量を確保しな
がら除湿を促進して冷房運転を行うに好適な空気調和装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner suitable for performing a cooling operation by promoting dehumidification while securing a large air flow.
【０００２】[0002]
【従来の技術】従来の装置は、特開昭６３−７３０４４
号公報に記載のように、空気調和機の空気吹き出し量、
すなわち空気調和装置の蒸発器を通過する風量を低下さ
せることにより除湿運転を行うものであった。2. Description of the Related Art A conventional apparatus is disclosed in JP-A-63-73044.
As described in the official gazette, the air blowing amount of the air conditioner,
That is, the dehumidifying operation is performed by reducing the amount of air passing through the evaporator of the air conditioner.
【０００３】[0003]
【発明が解決しようとする課題】コンピュータ冷却用の
空気調和機等においては、冷却対象であるコンピュータ
が低湿度の空気で冷却されると、静電気などの障害を受
けるため、室内空気を冷却しても除湿しないのが望まし
く、蒸発器を通過する風量を大きくして、冷凍サイクル
における冷媒蒸発温度および圧力を高く維持して蒸発器
の熱交換用フィンやパイプの表面温度を空調機吸込空気
の露点温度より高くすることにより除湿しないようにし
ている。In an air conditioner or the like for cooling a computer, if a computer to be cooled is cooled by low-humidity air, it will be damaged by static electricity or the like. It is also desirable not to dehumidify, and to increase the air volume passing through the evaporator, maintain the refrigerant evaporation temperature and pressure in the refrigeration cycle high, and adjust the surface temperature of the heat exchange fins and pipes of the evaporator to the dew point of the air drawn into the air conditioner. By setting it higher than the temperature, it is prevented from dehumidifying.
【０００４】しかし、コンピュータルームへの高湿度空
気の侵入や人間などによる潜熱負荷の増大によって、人
にとって不快感をおぼえる程室内の湿度が高くなり過
ぎ、場合によって除湿が要求され、それに応ずる空気調
和機に除湿機能が要求されることがある。ところで上記
のような場合に、従来の方法を採用すると、除湿はでき
るが、風量が十分に得られないという問題があった。However, due to the intrusion of high-humidity air into the computer room and the increase in latent heat load by humans, the humidity in the room becomes too high to cause discomfort to humans, and in some cases, dehumidification is required. The machine may be required to have a dehumidifying function. By the way, in the above case, if the conventional method is adopted, dehumidification can be performed, but there is a problem that a sufficient air volume cannot be obtained.
【０００５】本発明は、上記問題を解決するためになさ
れたもので、吹き出し風量を所定量保持して、冷凍サイ
クル制御により除湿を可能とする空気調和装置を提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide an air conditioner capable of holding a predetermined amount of blown air and dehumidifying by refrigeration cycle control.
【０００６】[0006]
【０００７】[0007]
【０００８】[0008]
【０００９】[0009]
【課題を解決するための手段】 上記目的を達成するため
に、 本発明の空気調和装置は、圧縮機、凝縮器、電気式
膨張弁、蒸発器及びアキュムレータを順次に冷媒配管に
よって循環接続して冷房冷凍サイクルを形成し、蒸発器
から所定風量で冷風を出す装置であって、電気式膨張弁
は互いに上下に並列配置した２台で、そして蒸発器は電
気式膨張弁それぞれに接続するフィン付パイプで構成
し、蒸発器で冷却する吸込み空気の温度及び湿度を検出
する温湿度センサと；温湿度センサにより検出した湿度
が所定値より高い時に、下に配置した電気式膨張弁を閉
止する制御器と；を設けたことを特徴とする。 [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
, The air conditioner of the present invention, a compressor, a condenser, electric expansion valve, and loop connection to form a cooling refrigeration cycle by the evaporator and sequentially refrigerant pipe accumulator, cold air at a predetermined air volume from the evaporator The electric expansion valves are two units arranged in parallel one above the other, and the evaporator is composed of finned pipes connected to each electric expansion valve, and the temperature of the suction air cooled by the evaporator And a controller for closing the electric expansion valve disposed below when the humidity detected by the temperature and humidity sensor is higher than a predetermined value.
【００１０】[0010]
【００１１】[0011]
【００１２】[0012]
【００１３】また本発明の空気調和装置は、上記空気調
和装置に加えて、圧縮機吐出側の冷媒温度を検出する温
度センサを設け、制御器には、この温度センサが検出し
た温度が所定値より高くなった時に、その間一部の電気
式膨張弁の閉止を停止し全ての電気式膨張弁を開くよう
にする機能を設けたものである。[0013] air conditioner of the present invention, in addition to the air conditioner, a temperature sensor for detecting the refrigerant temperature of the compressor discharge side is provided, the control unit, the temperature of the temperature sensor detects a predetermined When the value becomes higher than the predetermined value, a function is provided for stopping the closing of some of the electric expansion valves and opening all the electric expansion valves.
【００１４】[0014]
【作用】本発明の各空気調和機において、圧縮機から吐
出された高温高圧のガス冷媒は、凝縮器で凝縮して高温
高圧の液冷媒となり、電気式膨張弁で減圧され、蒸発器
で蒸発して低温低圧のガス冷媒となり、アキュムレータ
を経て圧縮機に戻る冷凍サイクルを形成する。蒸発器に
は冷媒が蒸発する際にその冷媒と熱交換して冷却される
所定流量の空気が吸入され、そして冷却された空気は冷
房用として室内に吹き出される。In each air conditioner of the present invention, the high-temperature and high-pressure gas refrigerant discharged from the compressor is condensed by the condenser to become a high-temperature and high-pressure liquid refrigerant, decompressed by the electric expansion valve, and evaporated by the evaporator. As a result, a low-temperature and low-pressure gas refrigerant is formed, and a refrigeration cycle is formed that returns to the compressor via the accumulator. When the refrigerant evaporates, a predetermined flow rate of air that is cooled by exchanging heat with the refrigerant when the refrigerant evaporates is drawn in, and the cooled air is blown into the room for cooling.
【００１５】[0015]
【００１６】[0016]
【００１７】[0017]
【００１８】本発明の空気調和装置においては、温湿度
センサは蒸発器で冷却する吸込み空気の温度及び湿度を
検出し、そして制御器は、温湿度センサにより検出した
湿度が所定値より高い時に、上下に配置された２つの電
気式膨張弁のうち下の方を閉止するので、上の電気式膨
張弁に接続するフィン付パイプの表面温度が低下して露
点以下となり、蒸発器上部の熱交換によって空気調和装
置の吸込空気から除湿されて熱交換器のフィンやパイプ
に結露し、発生したドレン水が蒸発器下部へ落下して排
出され、かくして除湿促進運転を行うことができる。[0018] In air conditioning apparatus of the present invention, the temperature and humidity sensor detects the temperature and humidity of the intake air is cooled by the evaporator, and the controller, when the humidity detected by the temperature and humidity sensor is higher than a predetermined value Since the lower one of the two electric expansion valves arranged above and below is closed, the surface temperature of the finned pipe connected to the upper electric expansion valve is lowered to be lower than the dew point, and the heat at the upper part of the evaporator is reduced. By the replacement, the dehumidified air from the intake air of the air conditioner is condensed on the fins and pipes of the heat exchanger, and the generated drain water falls to the lower part of the evaporator and is discharged. Thus, the dehumidification promotion operation can be performed.
【００１９】また本発明の空気調和装置は、前記空気調
和装置に加えて、圧縮機吐出側の冷媒温度を検出する温
度センサを設け、また制御器には温度センサが検出した
温度が所定値より高くなった時に、除湿促進運転を停止
する機能を設けている。これは、除湿促進運転の間に、
冷媒循環量が減少して圧縮機駆動用モータを冷却する性
能が低下し、圧縮機吐出側の冷媒温度が過度に上昇する
とモータの絶縁劣化を生じるので、この絶縁劣化を防止
するために設けている。[0019] air conditioner of the present invention, in addition to the air conditioner, a temperature sensor for detecting the refrigerant temperature of the compressor discharge side is provided, and the control device temperature is a predetermined value that the temperature sensor has detected the A function is provided to stop the dehumidification promotion operation when the temperature becomes higher. This is during dehumidification promotion operation
The performance of cooling the compressor drive motor decreases due to a decrease in the amount of the refrigerant circulating, and if the refrigerant temperature on the discharge side of the compressor excessively rises, the insulation of the motor deteriorates, so it is provided to prevent this insulation deterioration. I have.
【００２０】以上説明したように、本発明の各空気調和
装置によれば、所定の風量で冷房運転しながら、除湿を
行うことができる。As described above, according to each air conditioner of the present invention, dehumidification can be performed while performing cooling operation at a predetermined air volume.
【００２１】[0021]
【実施例】以下、本発明の実施例を図１から図９により
説明する。 （第１実施例）図１は第１実施例の空気調和装置の冷凍
サイクル系統図、図２は同冷凍サイクルの圧力状態図で
ある。図１に示すように、第１実施例の空気調和装置
は、圧縮機１、凝縮器２、電気式膨張弁３、蒸発器４、
アキュムレータ５の主要部品が順次冷媒配管で接続さ
れ、冷凍サイクルを形成するように構成されている。そ
して、圧縮機１の吸入側圧力を検出する圧力センサ６及
び吐出側圧力を検出する圧力センサ７、吐出側冷媒温度
を検出するサーミスタ８が設けられ、また電気式膨張弁
３に膨張弁開度を出力したり、圧力センサ６，７からの
圧力検出信号やサーミスタ８からの冷媒吐出ガス温度信
号等を受取り、冷凍サイクルをマイクロコンピュータに
より制御する制御器９が設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. (First Embodiment) FIG. 1 is a refrigeration cycle system diagram of an air conditioner of a first embodiment, and FIG. 2 is a pressure state diagram of the refrigeration cycle. As shown in FIG. 1, the air conditioner of the first embodiment includes a compressor 1, a condenser 2, an electric expansion valve 3, an evaporator 4,
The main components of the accumulator 5 are sequentially connected by a refrigerant pipe to form a refrigeration cycle. Further, a pressure sensor 6 for detecting a suction side pressure of the compressor 1, a pressure sensor 7 for detecting a discharge side pressure, and a thermistor 8 for detecting a discharge side refrigerant temperature are provided. And a controller 9 for receiving a pressure detection signal from the pressure sensors 6 and 7 and a refrigerant discharge gas temperature signal from the thermistor 8 and controlling the refrigeration cycle by a microcomputer.
【００２２】冷房運転時、圧縮機１から吐出された高温
高圧のガス冷媒は、凝縮器２で凝縮して高温高圧の液冷
媒となり、電気式膨張弁３で減圧され、蒸発器４で蒸発
して低温低圧のガス冷媒となり、そしてアキュムレータ
５を経て圧縮機１に戻る冷凍サイクルを形成する。蒸発
器４には、冷媒が蒸発する際にその冷媒と熱交換して冷
却される所定流量の空気が吸入され、そして冷却された
空気は冷房用として室内に吹き出される。During the cooling operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed by the condenser 2 to become a high-temperature and high-pressure liquid refrigerant, decompressed by the electric expansion valve 3, and evaporated by the evaporator 4. Then, a low-temperature low-pressure gas refrigerant is formed, and a refrigeration cycle is returned to the compressor 1 via the accumulator 5. A predetermined flow rate of air that is cooled by exchanging heat with the refrigerant when the refrigerant evaporates is sucked into the evaporator 4, and the cooled air is blown into the room for cooling.
【００２３】通常この冷凍サイクルにおいて、制御器９
は、冷房負荷により決定した運転周波数により圧縮機１
を駆動し、またサーミスタ８により検出した冷媒吐出ガ
ス温度Ｔｄと、圧力センサ７により検出した冷媒吐出圧
力Ｐｄから算出した凝縮温度Ｔｃとの差である冷媒吐出
側過熱度ＴｄＳＨが、予め適切な冷凍サイクルが形成で
きるように定められた値となるように、電気式膨張弁３
の開度をＶ1に調整して冷房運転を行っている。また、
制御器９には、空気調和装置の吸込空気すなわち蒸発器
４の吸込空気の温湿度を検知するセンサ１０と吹出空気
の温湿度を検出するセンサ１１とが接続されており、こ
れらセンサからのデータにより冷房負荷を算出してい
る。Usually, in this refrigeration cycle, the controller 9
Is the compressor 1 according to the operating frequency determined by the cooling load.
And the refrigerant discharge side superheat degree TdSH, which is the difference between the refrigerant discharge gas temperature Td detected by the thermistor 8 and the condensation temperature Tc calculated from the refrigerant discharge pressure Pd detected by the pressure sensor 7, The electric expansion valve 3 is set to a value determined so that a cycle can be formed.
It is carried out cooling operation by adjusting the opening degree V 1. Also,
The controller 9 is connected with a sensor 10 for detecting the temperature and humidity of the intake air of the air conditioner, that is, the intake air of the evaporator 4, and a sensor 11 for detecting the temperature and humidity of the blown air. Is used to calculate the cooling load.
【００２４】以上のように冷媒吐出側過熱度ＴｄＳＨが
所定値となるように制御される通常冷房運転状態におい
て、センサ10により検出された吸込空気の湿度が、予め
制御器９に設定された所定値よりも高くなった場合に、
その湿度を低下させるため、除湿を促進する冷凍サイク
ル運転（以後、除湿促進運転という）に制御器９により
切換える。As described above, in the normal cooling operation state in which the superheat degree TdSH on the refrigerant discharge side is controlled to a predetermined value, the humidity of the suction air detected by the sensor 10 is adjusted to a predetermined value set in the controller 9 in advance. If it is higher than the value,
In order to reduce the humidity, the controller 9 switches to a refrigeration cycle operation for promoting dehumidification (hereinafter referred to as a dehumidification promotion operation).
【００２５】制御器９には、吸込空気温度の湿温度デー
タから、その空気条件における露点温度より蒸発器のフ
ィンやパイプの表面温度が低くなるような蒸発圧力とな
る時の圧縮機の吸込側冷媒圧力Ｐｓを求めるプログラム
がマイクロコンピュータに組み込まれている。制御器９
は、図２に示すように通常冷房時、膨張弁開度Ｖ1の時
に圧縮機吸込側圧力Ｐ1で運転している状態から、上記
のプログラムに従って目標の吸込側圧力Ｐ2を算出し、
圧力センサ６により吸込側圧力を検知しながら、電気式
膨張弁３を絞り方向に開度Ｖを変更して、吸込側圧力Ｐ
ｓがＰ2となるように除湿促進運転の制御を行う。以上
のような操作により、蒸発器４を構成するフィン付パイ
プの表面温度が低下して、フィンやパイプの表面に結露
が生じ、吸込空気からの除湿が促進されて湿度が低下す
る。そして、吸込空気の湿度が制御器９に設定された所
定値より低下したら、制御器９は、除湿促進運転を中止
し、通常の冷房運転を復帰させる。Based on the humidity temperature data of the suction air temperature, the controller 9 controls the suction side of the compressor when the evaporation pressure is such that the surface temperature of the fins and pipes of the evaporator becomes lower than the dew point temperature under the air condition. A program for determining the refrigerant pressure Ps is incorporated in the microcomputer. Controller 9
Calculates the normal cooling as shown in FIG. 2, from a state operating at the compressor suction side pressure P 1 when the expansion valve V 1, the suction side pressure P 2 goal according to the above program,
While detecting the suction side pressure by the pressure sensor 6, the opening degree V of the electric expansion valve 3 is changed in the throttle direction, and the suction side pressure P is changed.
s is controls the dehumidifying facilitate operation such that P 2. By the above-described operation, the surface temperature of the finned pipe constituting the evaporator 4 decreases, and dew condensation occurs on the surfaces of the fins and the pipe, dehumidification from the intake air is promoted, and the humidity decreases. Then, when the humidity of the intake air falls below a predetermined value set in the controller 9, the controller 9 stops the dehumidification promotion operation and returns the normal cooling operation.
【００２６】上記のように、本実施例によれば、空気調
和装置の所定風量で送風しながら冷媒の冷凍サイクルを
制御することにより室内空気の除湿を行うことができ
る。As described above, according to the present embodiment, the indoor air can be dehumidified by controlling the refrigeration cycle of the refrigerant while blowing at a predetermined air volume of the air conditioner.
【００２７】（第２実施例）図３は本発明の第２実施例
の空気調和装置の冷凍サイクル系統図、図４は同冷凍サ
イクルの温度状態図である。本実施例の冷凍サイクル系
統は、第１実施例の冷凍サイクル系統において蒸発器４
を構成するフィン付パイプにサーミスタ12を取付けたも
のである。第２実施例では、第１実施例のごとく圧縮機
吸込側圧力Ｐｓを目標値Ｐ2になるように制御するかわ
りに、制御器９は吸込空気の温湿度データから、その空
気条件における露点温度よりも低い目標温度Ｔ2を予め
制御器９に組み込まれたプログラムにより算出し、図４
に示すようにサーミスタ12により検出される蒸発器３の
温度Ｔｅが通常冷房運転時のＴ1の状態からＴ2の状態へ
低下するように電気式膨張弁３の開度Ｖを絞り方向に制
御する。かくして、蒸発器４のフィンやパイプの表面温
度を低下させ、除湿を促進する。(Second Embodiment) FIG. 3 is a refrigeration cycle system diagram of an air conditioner according to a second embodiment of the present invention, and FIG. 4 is a temperature state diagram of the refrigeration cycle. The refrigeration cycle system of the present embodiment is different from the refrigeration cycle system of the first embodiment in that the evaporator 4
The thermistor 12 is attached to a finned pipe constituting the above. In the second embodiment, instead of controlling the compressor suction side pressure Ps as the first embodiment so that the target value P 2, the controller 9 from the temperature and humidity data of the suction air, the dew point temperature at the air condition A lower target temperature T 2 is calculated by a program previously incorporated in the controller 9 and FIG.
Controlled so throttle opening degree V of the electric expansion valve 3 so that the temperature Te of the evaporator 3 which is detected by the thermistor 12 is reduced from the normal cooling operation when the T 1 state to the state of the T 2 as shown in I do. Thus, the surface temperature of the fins and pipes of the evaporator 4 is reduced, and dehumidification is promoted.
【００２８】（第３実施例）第１および第２実施例にお
いて、電気式膨張弁３の開度Ｖを変更して圧縮機吸込側
圧力Ｐｓを低下、あるいは蒸発器の温度Ｔｅを低下させ
ている間に、冷凍サイクルの状態によっては、冷媒循環
量の減少により圧縮機駆動用モータの冷却性能が低下し
て、そのモータコイルの温度が上昇し、モータの絶縁劣
化が生じる可能性がある。(Third Embodiment) In the first and second embodiments, the opening degree V of the electric expansion valve 3 is changed to lower the compressor suction side pressure Ps, or to lower the evaporator temperature Te. During this period, depending on the state of the refrigeration cycle, the cooling performance of the compressor driving motor may be reduced due to the decrease in the amount of circulating refrigerant, and the temperature of the motor coil may increase, resulting in deterioration of the motor insulation.
【００２９】制御器９は図５に示すように、サーミスタ
８により冷媒吐出ガス温度Ｔｄを検知することによって
圧縮機モータコイル温度の上昇をチェックし、冷媒吐出
ガス温度Ｔｄが予め定められた所定値Ｔｄ1以上となっ
たら電気式膨張弁３の開度の制御を中止する、あるい
は、冷媒吐出ガス温度が所定値Ｔｄ2以下となるまで電
気式膨張弁３の開度を開き方向に補正して冷媒循環量を
確保しながら除湿促進運転を継続する。As shown in FIG. 5, the controller 9 checks the rise of the compressor motor coil temperature by detecting the refrigerant discharge gas temperature Td by the thermistor 8, and sets the refrigerant discharge gas temperature Td to a predetermined value. When Td 1 or more, the control of the opening of the electric expansion valve 3 is stopped, or the opening of the electric expansion valve 3 is corrected in the opening direction until the refrigerant discharge gas temperature becomes equal to or less than the predetermined value Td 2. Continue the dehumidification promotion operation while securing the refrigerant circulation amount.
【００３０】（第４実施例）図６は第４実施例の空気調
和装置の冷凍サイクル系統図である。本実施例の空気調
和装置は基本的に第１実施例と同様の冷凍サイクルを構
成しているが、減圧装置として並列に２個の電気式膨張
弁13,14を備え、各電気式膨張弁に対応して蒸発器4が分
割されている。本実施例において除湿促進運転を行う場
合、一方の電気式膨張弁13に制御器9から膨張弁開度Ｖ
を全閉状態にするように出力し、膨張弁13に対応する蒸
発器４の一部を閉塞する。以上の操作により、蒸発器４
での熱交換能力が低下し、その結果として冷媒蒸発圧力
および温度が低下し、蒸発器４での結露が促進され、吸
込空気から除湿を行うことができる。(Fourth Embodiment) FIG. 6 is a refrigeration cycle system diagram of an air conditioner of a fourth embodiment. The air conditioner of this embodiment basically constitutes a refrigeration cycle similar to that of the first embodiment, but includes two electric expansion valves 13 and 14 in parallel as a pressure reducing device. The evaporator 4 is divided corresponding to. When the dehumidification promotion operation is performed in the present embodiment, the controller 9 controls one of the electric expansion valves 13 to open the expansion valve V.
Is output so as to be in a fully closed state, and a part of the evaporator 4 corresponding to the expansion valve 13 is closed. By the above operation, the evaporator 4
The heat exchange capacity of the evaporator 4 decreases, and as a result, the refrigerant evaporation pressure and temperature decrease, the dew condensation in the evaporator 4 is promoted, and dehumidification can be performed from the intake air.
【００３１】（第５実施例）本実施例は、第４実施例と
同じ構成要素の冷凍サイクルを形成している。図７に示
すように蒸発器４は、上下２段に分割され、蒸発器４の
下部に対応して電気式膨張弁13が設けられ、上部に対応
して電気式膨張弁14が設けられている。ここで、第４実
施例に記載したように電気式膨張弁13の膨張弁開度を全
閉状態にし、膨張弁13に対応する蒸発器４の下部を閉塞
することにより、蒸発器４の上部での熱交換による除湿
が行われる。そして、上部で吸込空気から除湿されて熱
交換器のフィンやパイプに結露し発生したドレン水は、
乾いている蒸発器下部へ落下して排除され、以上のよう
な作用が連続的に行われることによって蒸発器上部での
除湿が効率的に行われる。(Fifth Embodiment) This embodiment forms a refrigeration cycle having the same components as the fourth embodiment. As shown in FIG. 7, the evaporator 4 is divided into upper and lower stages, and an electric expansion valve 13 is provided at a lower part of the evaporator 4 and an electric expansion valve 14 is provided at an upper part. I have. Here, as described in the fourth embodiment, the opening of the expansion valve of the electric expansion valve 13 is fully closed, and the lower part of the evaporator 4 corresponding to the expansion valve 13 is closed, so that the upper part of the evaporator 4 is opened. Dehumidification by heat exchange is performed. Then, the drain water that is dehumidified from the intake air at the top and condensed on the fins and pipes of the heat exchanger and generated,
By being dropped to the lower part of the evaporator which is dry and eliminated, the above operation is continuously performed, so that the dehumidification at the upper part of the evaporator is efficiently performed.
【００３２】（第６実施例）本実施例は、第１実施例か
ら第５実施例のような除湿を促進した冷凍サイクルの運
転を行う場合には、冷媒蒸発圧力の低下により冷媒循環
量が低下し冷却能力が減少するため、図８の制御流れ図
に示すように、連続で除湿を促進した冷凍サイクル運転
ができる時間に制限を設けて、最大運転時間を越えた
ら、膨張弁３の開度を通常冷房制御による開度とし、所
定時間後に再び吸込空気の湿度を検知して、所定値より
湿度が高い場合には除湿を促進した冷凍サイクルの運転
を行うという操作により、全体としての冷房能力を確保
することができる。(Sixth Embodiment) In this embodiment, when the refrigeration cycle in which the dehumidification is promoted is operated as in the first to fifth embodiments, the refrigerant circulation amount is reduced due to a decrease in the refrigerant evaporation pressure. Since the cooling capacity decreases and the cooling capacity decreases, as shown in the control flow chart of FIG. 8, a time limit is set for the refrigeration cycle operation in which continuous dehumidification is promoted, and when the maximum operation time is exceeded, the opening degree of the expansion valve 3 is increased. Is the opening degree by the normal cooling control, the humidity of the intake air is detected again after a predetermined time, and when the humidity is higher than the predetermined value, the operation of the refrigeration cycle that promotes the dehumidification is performed. Can be secured.
【００３３】（第７実施例）本実施例では、第１実施例
から第５実施例のような除湿を促進した冷凍サイクルの
運転を行う場合には、冷媒蒸発圧力の低下により冷媒循
環量が低下し冷房能力が減少するため、吹出温度が上昇
する。(Seventh Embodiment) In this embodiment, when the refrigeration cycle in which the dehumidification is promoted as in the first to fifth embodiments is operated, the refrigerant circulation amount is reduced due to a decrease in the refrigerant evaporation pressure. As the cooling capacity decreases and the cooling capacity decreases, the outlet temperature increases.
【００３４】よって予め上記のような除湿を促進した冷
凍サイクル運転を行う場合に図９の制御流れ図に示すよ
うに、許容できる吹出温度の上限を設定しておき、吹出
温度がその上限値を超えた場合には、除湿を促進した冷
凍サイクル運転を中断し、通常の冷房運転に復帰させ、
再び吹出温度が上限値から予め定められた所定値に低下
したら、再び吸込空気の湿度を検知して所定値より湿度
が高い場合には除湿促進運転を行い、全体として冷房能
力を確保することができる。Therefore, when performing the above-described refrigeration cycle operation in which dehumidification is promoted, as shown in the control flow chart of FIG. 9, an allowable upper limit of the blowing temperature is set, and the blowing temperature exceeds the upper limit value. In the case of refrigeration cycle operation that promotes dehumidification is interrupted and returned to normal cooling operation,
When the outlet temperature drops again from the upper limit to the predetermined value, the humidity of the intake air is detected again, and if the humidity is higher than the predetermined value, the dehumidification promotion operation is performed to secure the cooling capacity as a whole. it can.
【００３５】[0035]
【発明の効果】本発明によれば、空気調和装置を、冷房
運転中に空気調和装置の吸込空気の湿度がある値まで上
昇した時に、その間電気式膨張弁の開度を減少させ、蒸
発器の冷媒蒸発温度または冷媒蒸発圧力を低下させ、蒸
発器の熱交換用フィン付パイプの表面温度が吸込空気の
露点より低い温度となるよう制御する装置としたので、
所定風量を保持しながら冷房冷凍サイクルの制御により
除湿運転が可能になる。したがって、本発明の空気調和
装置を用いれば、コンピュータへ必要な湿度で大きな風
量でもって冷風を供給でき、かつコンピュータルームい
る人が高湿度で感じる不快感を緩和することができる。According to the present invention, when the humidity of the intake air of the air conditioner rises to a certain value during the cooling operation of the air conditioner, the opening of the electric expansion valve is reduced during that time. Since the temperature of the refrigerant evaporating temperature or the refrigerant evaporating pressure is lowered, the surface temperature of the heat exchange finned pipe of the evaporator is controlled to be lower than the dew point of the suction air.
The dehumidification operation can be performed by controlling the cooling refrigeration cycle while maintaining the predetermined air volume. Therefore, by using the air-conditioning apparatus of the present invention, it is possible to supply a cool air to a computer with a large amount of air at a required humidity, and to alleviate the uncomfortable feeling of a person in a computer room at a high humidity.
【図１】第１実施例の空気調和装置の冷凍サイクル系統
図である。FIG. 1 is a refrigeration cycle system diagram of an air conditioner of a first embodiment.
【図２】第１実施例の空気調和装置の冷凍サイクル圧力
状態図である。FIG. 2 is a refrigeration cycle pressure state diagram of the air conditioner of the first embodiment.
【図３】第２実施例の空気調和装置の冷凍サイクル系統
図である。FIG. 3 is a refrigeration cycle system diagram of an air conditioner of a second embodiment.
【図４】第２実施例の空気調和装置の冷凍サイクル温度
状態図である。FIG. 4 is a refrigeration cycle temperature state diagram of the air conditioner of the second embodiment.
【図５】第３実施例の空気調和装置の冷凍サイクル状態
図である。FIG. 5 is a refrigeration cycle state diagram of the air conditioner of the third embodiment.
【図６】第４実施例の空気調和装置の冷凍サイクル系統
図である。FIG. 6 is a refrigeration cycle system diagram of an air conditioner of a fourth embodiment.
【図７】第５実施例の空気調和装置の蒸発器部構造図で
ある。FIG. 7 is a structural diagram of an evaporator section of an air conditioner of a fifth embodiment.
【図８】第６実施例の空気調和装置の制御流れ図であ
る。FIG. 8 is a control flowchart of the air conditioner of the sixth embodiment.
【図９】第７実施例の空気調和装置の制御流れ図であ
る。FIG. 9 is a control flowchart of the air conditioner of the seventh embodiment.
１ 圧縮機 ２ 凝縮器 ３ 電気式膨脹弁 ４ 蒸発器 ５ アキュムレ−タ ６，７ 圧力センサ ８ サーミスタ ９ 制御器 １０，１１ 温湿度センサ １２ サーミスタ １３，１４ 電気式膨脹弁 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Electric expansion valve 4 Evaporator 5 Accumulator 6,7 Pressure sensor 8 Thermistor 9 Controller 10,11 Temperature and humidity sensor 12 Thermistor 13,14 Electric expansion valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−215000（ＪＰ，Ａ) 特開 昭61−49955（ＪＰ，Ａ) 実開 平３−18443（ＪＰ，Ｕ) 実開 昭63−101739（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 1/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-215000 (JP, A) JP-A-61-49955 (JP, A) JP-A-3-18443 (JP, U) JP-A-63 101739 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F25B 1/00
Claims (2)
及びアキュムレータを順次に冷媒配管によって循環接続
して冷房冷凍サイクルを形成し、前記蒸発器から所定風
量で冷風を出す空気調和装置において、 前記電気式膨張弁は互いに上下に並列配置した２台で構
成し、前記蒸発器は前記電気式膨張弁それぞれに接続す
るフィン付パイプで構成し、前記蒸発器で冷却する吸込
み空気の温度及び湿度を検出する温湿度センサと；前記
温湿度センサにより検出した湿度が所定値より高い時
に、前記下に配置した電気式膨張弁を閉止する制御器
と；を設けたことを特徴とする空気調和装置。1. An air conditioner that forms a cooling refrigeration cycle by sequentially circulating a compressor, a condenser, an electric expansion valve, an evaporator, and an accumulator by a refrigerant pipe to generate a cool air from the evaporator at a predetermined air volume. In the above, the electric expansion valve is constituted by two units arranged in parallel one above the other, the evaporator is constituted by a pipe with fins connected to each of the electric expansion valves, and the temperature of the intake air cooled by the evaporator is And a temperature / humidity sensor for detecting humidity and a controller for closing an electric expansion valve disposed below when the humidity detected by the temperature / humidity sensor is higher than a predetermined value. Harmony equipment.
及びアキュムレータを順次に冷媒配管によって循環接続
して冷房冷凍サイクルを形成し、前記蒸発器から所定風
量で冷風を出す空気調和装置において、 前記電気式膨張弁は互いに上下に並列配置した２台で構
成し、前記蒸発器で冷却する吸込み空気の温度及び湿度
を検出する温湿度センサと；前記圧縮機吐出側の冷媒温
度を検出する温度センサと；前記温湿度センサにより検
出した湿度が所定値より高い時に、前記下に配置した電
気式膨張弁を閉止し、かつ前記温度センサが検出した温
度が所定値より高くなった時に、その間前記下に配置し
た電気式膨張弁を開くようにする制御器と；を設けたこ
とを特徴とする空気調和装置。2. An air conditioner in which a compressor, a condenser, an electric expansion valve, an evaporator, and an accumulator are sequentially circulated and connected by a refrigerant pipe to form a cooling refrigeration cycle, and cool air is emitted from the evaporator at a predetermined air volume. In the above, the electric expansion valve is composed of two units arranged in parallel one above the other, and a temperature / humidity sensor for detecting the temperature and humidity of the suction air cooled by the evaporator; and detecting the refrigerant temperature on the compressor discharge side. A temperature sensor to perform; when the humidity detected by the temperature and humidity sensor is higher than a predetermined value, when the electric expansion valve disposed below is closed, and when the temperature detected by the temperature sensor becomes higher than a predetermined value, A controller for opening the electric expansion valve disposed below during the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04389393A JP3306455B2 (en) | 1993-03-04 | 1993-03-04 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04389393A JP3306455B2 (en) | 1993-03-04 | 1993-03-04 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06257865A JPH06257865A (en) | 1994-09-16 |
| JP3306455B2 true JP3306455B2 (en) | 2002-07-24 |
Family
ID=12676392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04389393A Expired - Lifetime JP3306455B2 (en) | 1993-03-04 | 1993-03-04 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3306455B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070107255A1 (en) * | 2004-04-09 | 2007-05-17 | Matsushita Electric Industrial Co., Ltd. | Drying apparatus |
| CN102672625B (en) * | 2011-03-17 | 2016-12-14 | 新东工业株式会社 | Shot peening nozzle and possess the blasting apparatus of this nozzle |
| EP2703551B1 (en) * | 2012-09-04 | 2015-01-28 | Whirlpool Corporation | Cooling system for a heat pump drier and heat pump drier using such cooling system |
| CN108105919B (en) * | 2018-01-23 | 2024-03-29 | 广东海悟科技有限公司 | Variable frequency air conditioner system for dry working condition refrigeration and control method thereof |
| CN110360729A (en) * | 2018-04-09 | 2019-10-22 | 珠海格力电器股份有限公司 | A kind of high head pressure control method of unit, device and air-conditioning equipment |
-
1993
- 1993-03-04 JP JP04389393A patent/JP3306455B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06257865A (en) | 1994-09-16 |
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