JP2649471B2 - Outside air processing unit - Google Patents
Outside air processing unitInfo
- Publication number
- JP2649471B2 JP2649471B2 JP5053058A JP5305893A JP2649471B2 JP 2649471 B2 JP2649471 B2 JP 2649471B2 JP 5053058 A JP5053058 A JP 5053058A JP 5305893 A JP5305893 A JP 5305893A JP 2649471 B2 JP2649471 B2 JP 2649471B2
- Authority
- JP
- Japan
- Prior art keywords
- outside air
- defrosting operation
- time
- blower
- processing unit
- 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
Landscapes
- Air Conditioning Control Device (AREA)
- Central Air Conditioning (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、外気を調温・調湿して
室内へ導くための空気熱源ヒートポンプ式の外気処理ユ
ニットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air processing unit of an air heat source heat pump type for controlling the temperature and humidity of outside air and guiding it to a room.
【０００２】[0002]
【従来の技術】一般に、送風機、熱交換器を内蔵した室
内機と、熱交換器を内蔵した室外機とを備え、前記室内
機を介して外気を調温・調湿して室内へ導く外気処理ユ
ニットは知られている。この種のものはビル等の室内に
ビル管理法に従って所定量の外気を導入するために設置
される。2. Description of the Related Art Generally, an indoor unit having a built-in blower and a heat exchanger, and an outdoor unit having a built-in heat exchanger are provided. Processing units are known. This type is installed in a room such as a building to introduce a predetermined amount of outside air in accordance with a building management law.
【０００３】ところで、空気熱源ヒートポンプ式の外気
処理ユニットにあっては、外気が冷たい時期等に、室外
機の熱交換器に着霜する場合があり、この場合には例え
ば１０分間程度の除霜運転が行なわれている[0003] In an outside air treatment unit of an air heat source heat pump type, frost may be formed on a heat exchanger of an outdoor unit when the outside air is cold. In this case, for example, defrosting is performed for about 10 minutes. Driving
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、除霜運
転を行うに際し、室内機の送風機を停止して行う場合が
ある。この様な場合には、その除霜運転に要する時間内
は室内に外気を導入することができないので、外気を導
入しない分だけ、ビル管理法に従う所の外気の導入量を
確保できなくなるという問題がある。However, when performing the defrosting operation, there is a case where the indoor unit blower is stopped. In such a case, the outside air cannot be introduced into the room during the time required for the defrosting operation, so that the amount of outside air introduced in accordance with the Building Management Law cannot be secured because the outside air is not introduced. There is.
【０００５】そこで、本発明の目的は、上述した従来の
技術が有する問題点を解消し、室内機の送風機を停止し
て除霜運転を行った場合に、外気の導入量を十分に確保
することのできる外気処理ユニットを提供することにあ
る。Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to ensure a sufficient amount of outside air when the indoor unit blower is stopped and defrosting operation is performed. It is to provide an outside air processing unit which can perform the processing.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、送風機を内蔵した室内機を介して外気
を調温・調湿して室内へ導く外気処理ユニットにおい
て、送風機の運転を停止させて外気を導入しない状態で
室外熱交換器に付着した霜を除去する除霜運転を行う手
段と、その除霜運転の時間内に不足した外気の導入量を
補充するため除霜運転後の暖房運転時に送風機の回転数
を上昇させる手段とを備えたことを特徴とするものであ
る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an outside air processing unit for controlling the temperature and humidity of outside air through an indoor unit having a built-in blower and leading the air to a room. Means for performing a defrosting operation for removing frost adhering to the outdoor heat exchanger in a state where the operation is stopped and the outside air is not introduced, and an introduction amount of the outside air that is insufficient during the time of the defrosting operation.
Is characterized in that a means for increasing the rotational speed of the wind machine feed during the heating operation after the defrosting operation for replenishing.
【０００７】[0007]
【作用】外気の冷たい時期（冬期）等に、例えば室外機
の室外熱交換器に着霜すると、それを取除くための除霜
運転が行われる。この際には、送風機の運転が停止され
る。このように送風機の運転が停止された状態で除霜運
転が行われると、この除霜運転の時間内は外気が導入さ
れないことになる。しかして、この発明によれば、除霜
運転の時間内に暖房運転をしたならば得られたであろう
外気の導入量が演算されて、その分の外気の導入量を補
うために、除霜運転後の暖房運転時における、送風機の
回転数を上昇させて、除霜運転、及び暖房運転時におけ
るトータル時間内の外気の導入量が十分に確保される。When a frost is formed on, for example, an outdoor heat exchanger of an outdoor unit in a cold period of the outside air (winter), a defrosting operation for removing the frost is performed. At this time, the operation of the blower is stopped. When the defrosting operation is performed in a state where the operation of the blower is stopped, outside air is not introduced during the time of the defrosting operation. Thus, according to the present invention, the amount of outside air introduced that would have been obtained if the heating operation was performed during the time of the defrosting operation is calculated, and the amount of outside air introduced is compensated for to compensate for that amount. By increasing the rotation speed of the blower during the heating operation after the frost operation, the amount of outside air introduced during the total time during the defrost operation and the heating operation is sufficiently ensured.
【０００８】[0008]
【実施例】以下、本発明による外気処理ユニットの一実
施例を、添付図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the outside air processing unit according to the present invention will be described below with reference to the accompanying drawings.
【０００９】図１において、１はビル等の部屋を示して
いる。この部屋１の天井３には天井埋込型の室内機５が
設けられ、この室内機５には室外機７がつながれてい
る。そして、部屋１の内部は、この室内機５と室外機７
とからなる空調システムにより適温に空調される。In FIG. 1, reference numeral 1 denotes a room such as a building. A ceiling embedded type indoor unit 5 is provided on the ceiling 3 of the room 1, and an outdoor unit 7 is connected to the indoor unit 5. The interior of the room 1 includes the indoor unit 5 and the outdoor unit 7.
It is air-conditioned to an appropriate temperature by the air-conditioning system consisting of
【００１０】ところで、この種の部屋１の内部にはビル
管理法に従って所定量の外気が導入される。この外気
は、外気処理ユニット１１により調温・調湿されて導入
される。この外気処理ユニット１１は、室内機１３と室
外機１５とからなり、これらは空気熱源ヒートポンプを
構成している。Incidentally, a predetermined amount of outside air is introduced into the interior of this type of room 1 according to the building management law. The outside air is introduced after its temperature and humidity have been adjusted by the outside air processing unit 11. The outside air processing unit 11 includes an indoor unit 13 and an outdoor unit 15, and these constitute an air heat source heat pump.
【００１１】室内機１３には、図中で上から遠心型送風
機２１と、室内熱交換器２３と、フィルタ２５と、加湿
器（図示せず）とが内蔵され、このフィルタ２５の下方
より外気導入ダクト２７を通じて外気が導入され、そこ
で空調された後、この外気は、送風ダクト２９を通じ
て、上述の部屋１の内部に吹き出される。The indoor unit 13 has a built-in centrifugal blower 21, an indoor heat exchanger 23, a filter 25, and a humidifier (not shown) from above in the figure. After the outside air is introduced through the introduction duct 27 and air-conditioned there, the outside air is blown into the above-described room 1 through the ventilation duct 29.
【００１２】この室内機１３には室外機１５がつなが
れ、この室外機１５には、膨脹弁３１と、室外熱交換器
３３と、四方弁３５と、圧縮機３７とが内蔵されてい
る。室外熱交換器３３には温度センサ３９が取り付けら
れ、この温度センサ３９は、後述するように、本実施例
の要部を構成する制御器４１につながれている。An outdoor unit 15 is connected to the indoor unit 13. The outdoor unit 15 includes an expansion valve 31, an outdoor heat exchanger 33, a four-way valve 35, and a compressor 37. A temperature sensor 39 is attached to the outdoor heat exchanger 33, and this temperature sensor 39 is connected to a controller 41 constituting a main part of the present embodiment, as described later.
【００１３】外気が冷たい時期に、外気処理ユニット１
１を通じて外気を導入する際には、四方弁３５を図示の
ように切り替えて、冷媒を実線の矢印方向へ流すと共
に、送風機２１を運転する。この場合には、室内熱交換
器２３は凝縮器となるので、外気は暖められて、矢印で
示すように室内へ送られる。When the outside air is cold, the outside air processing unit 1
When the outside air is introduced through 1, the four-way valve 35 is switched as shown in the figure to flow the refrigerant in the direction of the solid line arrow and to operate the blower 21. In this case, since the indoor heat exchanger 23 becomes a condenser, the outside air is warmed and sent to the room as indicated by the arrow.
【００１４】このような外気の導入運転が行われている
間に、室外熱交換器３３に着霜した場合、これを除去す
るために除霜運転が行なわれる。If frost is formed on the outdoor heat exchanger 33 during the operation of introducing the outside air, a defrosting operation is performed to remove the frost.
【００１５】しかして、この実施例によれば、この除霜
運転を司るための制御に特徴を有している。According to this embodiment, the control for controlling the defrosting operation is characterized.
【００１６】その制御を、図２のフローチャートを参照
して説明すると、まず、送風機２１の回転数をＭrpm と
して暖房運転を開始する（Ｓ１）。そして、暖房運転の
開始後に、室外熱交換器３３に着霜があるか否か判断し
（Ｓ２）、着霜がなければそのまゝの状態で運転を継続
する（Ｓ３）。ここで着霜があるか否かは、温度センサ
ー３９の検知値に基づいて判断され、それが所定の値以
下であれば着霜があると判断される。The control will be described with reference to the flowchart of FIG. 2. First, the heating operation is started with the rotation speed of the blower 21 set to M rpm (S1). Then, after the start of the heating operation, it is determined whether or not the outdoor heat exchanger 33 has frost (S2). If there is no frost, the operation is continued in the same state (S3). Here, whether or not there is frost is determined based on the detection value of the temperature sensor 39, and if it is equal to or less than a predetermined value, it is determined that there is frost.
【００１７】着霜があれば、除霜運転を開始するが、こ
の際、図１の四方弁３５は点線の位置に切り替えられ、
送風機２１の運転は停止される（Ｓ４）。Ｓ４の除霜運
転時は、図１を参照して、外気処理ユニット１１の冷媒
は矢印と反対方向に流れるので、室内熱交換器２３は蒸
発器として吸熱作用を行なう。If there is frost, the defrosting operation is started. At this time, the four-way valve 35 in FIG. 1 is switched to the position indicated by the dotted line,
The operation of the blower 21 is stopped (S4). At the time of the defrosting operation in S4, referring to FIG. 1, the refrigerant in the outside air processing unit 11 flows in the direction opposite to the arrow, so that the indoor heat exchanger 23 performs an endothermic function as an evaporator.
【００１８】Ｓ４に引き続いて、室外熱交換器３３の着
霜状態は解除されたか（温度センサ３９の検知値に基づ
く）を判断し（Ｓ５）、解除されていなければ、Ｓ４に
戻り除霜運転を継続する。After S4, it is determined whether the frost formation state of the outdoor heat exchanger 33 has been released (based on the value detected by the temperature sensor 39) (S5). If not, the flow returns to S4 to perform the defrosting operation. To continue.
【００１９】着霜状態が解除されていれば、Ｓ６に進
み、Ｓ４の除霜運転に要した時間が何分間であったか、
その時間ｔ（例えば、１０分間）が求められ、ついでそ
の時間ｔ内に、遠心型送風機２１を回転させていたなら
ば得られたであろう外気の導入量ｑが演算される。この
外気の導入量ｑは、除霜運転時に導入できなかったいわ
ば外気の導入量の不足分である。If the frosting state has been released, the process proceeds to S6, and how long is the time required for the defrosting operation in S4?
The time t (for example, 10 minutes) is obtained, and then the outside air introduction amount q that would have been obtained if the centrifugal blower 21 was rotated within the time t is calculated. The introduction amount q of outside air is a shortage of the introduction amount of outside air that cannot be introduced during the defrosting operation.
【００２０】Ｓ７では、この不足した外気の導入量ｑを
除霜運転後の暖房運転時に補うために、導入量ｑに相当
する分だけの回転数αrpm を、暖房開始時（Ｓ１）の回
転数Ｍrpm に上乗せして（Ｍ＋α）rpm で暖房運転を再
開する。その後、この回転数（Ｍ＋α）rpm による暖房
運転が、外気導入ｑの不足分を補うだけの時間を経過し
たか否かをステップＳ８で検知して、経過後はその回転
数をＭrpm に戻す（ＳステップＳ９）。In S7, in order to compensate for the insufficient amount q of outside air introduced during the heating operation after the defrosting operation, the number of rotations α rpm corresponding to the amount q of introduced air is increased at the start of heating (S1). and plus the number M rpm (M + α) to resume the heating operation at rpm. Thereafter, in step S8, it is detected whether or not a time period sufficient to compensate for the shortage of the outside air introduction q has elapsed in the heating operation at this rotation speed (M + α) rpm , and after that, the rotation speed is returned to M rpm . (S step S9).
【００２１】即ち、図３ａを参照して、暖房運転が、単
位時間内ずっと継続したとすれば、送風機２１の回転数
Ｍrpm と単位時間とから、外気の導入量Ｑが求められ
る。この時の外気の導入量Ｑは、ビル管理法に従って設
定されている。That is, referring to FIG. 3A, assuming that the heating operation continues throughout the unit time, the introduction amount Q of the outside air is obtained from the rotation speed M rpm of the blower 21 and the unit time. The outside air introduction amount Q at this time is set according to the building management method.
【００２２】しかして、この実施例によれば、図３ｂに
示すように、時間ｔの間、除霜運転が行われるので、そ
の間は、外気が導入されない。Thus, according to this embodiment, as shown in FIG. 3B, the defrosting operation is performed during the time t, during which time no outside air is introduced.
【００２３】この間に不足する外気の導入量ｑは、つぎ
の暖房運転時に送風機２１の回転数を上昇させることに
より補われる。図３ｂでは、除霜運転後の暖房運転時
に、その不足分ｑを平均的に補っているが、これに限定
されるものではなく、例えば図３ｃ、図３ｄに示すよう
に、暖房運転再開後、徐々に回転数を上昇させて、徐々
に外気の導入量ｑを補うようにしてもよい。The shortage q of outside air introduced during this period is compensated by increasing the rotation speed of the blower 21 during the next heating operation. In FIG. 3B, the shortage q is compensated on average during the heating operation after the defrosting operation. However, the invention is not limited to this. For example, as shown in FIGS. 3C and 3D, after the heating operation is restarted. Alternatively, the rotational speed may be gradually increased to gradually supplement the amount q of outside air introduced.
【００２４】即ち、図３ｃ、図３ｄによれば、暖房運転
再開後の立上がり時に、送風機２１の回転数を小さくし
て、その風量を小さく抑え、時間の経過と共に回転数を
例えばＭ＋α′，Ｍ＋α″（ただし、α＜α′＜α″）
のように上昇させて、徐々に外気の導入量ｑを補うよう
にしている。That is, according to FIGS. 3c and 3d, at the time of start-up after restarting the heating operation, the number of revolutions of the blower 21 is reduced to keep the air volume small, and the number of revolutions is increased with time, for example, to M + α ′, M + α. ″ (However, α <α ′ <α ″)
And gradually compensates for the introduced amount q of outside air.
【００２５】これは以下の理由による。This is for the following reason.
【００２６】図１を参照して、暖房運転の再開時に、い
きなり送風機２１の回転数を上昇させると、室内熱交換
器２３の温度が十分上昇していないために冷たい外気が
室内に導入され過ぎて、室内１の温度が低下する。従っ
て、それを防止するために、暖房運転の再開当初には、
回転数を抑え、その風量を小さく抑えておいて、室内熱
交換器２３の温度がある程度上昇したら、その後、送風
機２１の回転数を大幅に上昇させることにより、上述し
た外気の導入量ｑを短時間のうちに補ってしまおうとす
るものである。Referring to FIG. 1, when the rotation speed of blower 21 is suddenly increased at the time of restarting the heating operation, cold outside air is excessively introduced into the room because the temperature of indoor heat exchanger 23 is not sufficiently increased. Thus, the temperature of the room 1 decreases. Therefore, in order to prevent this, at the beginning of heating operation,
When the temperature of the indoor heat exchanger 23 rises to some extent while the rotation speed is suppressed and the air volume is kept small, then the rotation amount of the blower 21 is greatly increased to shorten the above-described introduction amount q of outside air. They try to make up in time.
【００２７】要するに、上記の各実施例によれば、外気
の導入を停止した状態で除霜運転を行ったとしても、そ
の除霜運転後の暖房運転時に送風機２１の回転数を上昇
させることにより、除霜運転時の外気の導入不足を補う
ようにしているので、トータル時間内の外気の導入量は
確保されるので、ビル管理法に従う外気の導入量を十分
に確保することができる。In short, according to each of the above embodiments, even if the defrosting operation is performed in a state where the introduction of the outside air is stopped, the rotation speed of the blower 21 is increased during the heating operation after the defrosting operation. In addition, since the insufficient introduction of the outside air during the defrosting operation is compensated for, the introduction amount of the outside air within the total time is secured, so that the introduction amount of the outside air according to the building management method can be sufficiently secured.
【００２８】なお、通常、除霜運転はほぼ４０分毎に１
回の割合で行われ、１回当りの除霜時間は１０分間以内
に設定される。In general, the defrosting operation is performed approximately once every 40 minutes.
Defrosting is performed at a rate of one time, and the defrosting time per time is set within 10 minutes.
【００２９】従って、この発明によれば、上述したよう
にほぼ４０分毎に１回の割合で、外気の導入量ｑの不足
分が補われるので、従来のものに比べて、きわめて換気
性能のよい外気処理ユニットが提供される。Therefore, according to the present invention, as described above, the shortage of the outside air introduction amount q is compensated at a rate of approximately once every 40 minutes. A good fresh air treatment unit is provided.
【００３０】[0030]
【発明の効果】以上の説明から明らかなように、本発明
によれば、外気の導入を停止した状態で除霜運転を行っ
たとしても、その除霜運転後の暖房運転時に、除霜運転
時の外気の導入量不足が補われるので、トータル時間内
の外気の導入量は確保されるので、ビル管理法に従う外
気の導入量を確保することができる。As is apparent from the above description, according to the present invention, even if the defrosting operation is performed in a state where the introduction of the outside air is stopped, the defrosting operation is performed during the heating operation after the defrosting operation. Since the shortage of the amount of outside air introduced at the time is compensated, the amount of outside air introduced during the total time is secured, so that the amount of outside air introduced according to the Building Management Law can be secured.
【図１】本発明による外気処理ユニットの一実施例を示
す系統図である。FIG. 1 is a system diagram showing an embodiment of an outside air processing unit according to the present invention.
【図２】同じく除霜運転時のフローチャートである。FIG. 2 is a flowchart at the time of a defrosting operation.
【図３】ａ〜ｄは夫々単位時間内当りの外気の導入量を
示す図である。FIGS. 3A to 3D are diagrams each showing the amount of outside air introduced per unit time.
１ 部屋 １１ 外気処理ユニット １３ 室内機 １５ 室外機 ２１ 遠心型送風機 ２３ 室内熱交換器 ２５ フィルタ ２７ 外気導入ダクト ２９ 送風ダクト ３３ 室外熱交換器 ３７ 圧縮機 ４１ 制御器 1 room 11 outdoor air processing unit 13 indoor unit 15 outdoor unit 21 centrifugal blower 23 indoor heat exchanger 25 filter 27 outside air introduction duct 29 ventilation duct 33 outdoor heat exchanger 37 compressor 41 controller
フロントページの続き (72)発明者 佐藤 鋼平 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 矢本 明 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 特開 平６−101887（ＪＰ，Ａ) 特開 平５−187685（ＪＰ，Ａ)Continued on the front page (72) Inventor Kohei Sato 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Akira Yamoto 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric (56) References JP-A-6-101887 (JP, A) JP-A-5-187685 (JP, A)
Claims (1)
調温・調湿して室内へ導く外気処理ユニットにおいて、 送風機の運転を停止させて外気を導入しない状態で室外
熱交換器に付着した霜を除去する除霜運転を行う手段
と、 その除霜運転の時間内に不足した外気の導入量を補充す
るため除霜運転後の暖房運転時に送風機の回転数を上昇
させる手段とを備えたことを特徴とする外気処理ユニッ
ト。1. An outdoor air processing unit for controlling the temperature and humidity of outside air through an indoor unit having a built-in blower and guiding the air to a room, wherein the operation of the blower is stopped and the outside air is not introduced to the outdoor heat exchanger. Means for performing a defrosting operation for removing the defrosted frost, and replenish the shortage of outside air introduced during the time of the defrosting operation .
Outside air processing unit, characterized in that a means for increasing the rotational speed of the wind machine feed during the heating operation after because the defrosting operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053058A JP2649471B2 (en) | 1993-02-17 | 1993-02-17 | Outside air processing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053058A JP2649471B2 (en) | 1993-02-17 | 1993-02-17 | Outside air processing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06241536A JPH06241536A (en) | 1994-08-30 |
| JP2649471B2 true JP2649471B2 (en) | 1997-09-03 |
Family
ID=12932255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5053058A Expired - Lifetime JP2649471B2 (en) | 1993-02-17 | 1993-02-17 | Outside air processing unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2649471B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4165496B2 (en) * | 2004-11-17 | 2008-10-15 | 株式会社日立製作所 | Air conditioning system |
| US9835368B2 (en) * | 2011-09-13 | 2017-12-05 | Mitsubishi Electric Corporation | Refrigerating and air-conditioning apparatus for use in a defrosting operation |
| CN109564032B (en) | 2016-08-22 | 2020-11-27 | 三菱电机株式会社 | Heat pump device, air conditioner and water heater |
| JP6835141B2 (en) | 2019-05-31 | 2021-02-24 | ダイキン工業株式会社 | Air conditioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101887A (en) * | 1992-09-18 | 1994-04-12 | Fujitsu General Ltd | Method for controlling air-conditioner |
-
1993
- 1993-02-17 JP JP5053058A patent/JP2649471B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06241536A (en) | 1994-08-30 |
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