JP6080204B2 - How to control the number of air conditioners - Google Patents

How to control the number of air conditioners Download PDF

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JP6080204B2
JP6080204B2 JP2013063306A JP2013063306A JP6080204B2 JP 6080204 B2 JP6080204 B2 JP 6080204B2 JP 2013063306 A JP2013063306 A JP 2013063306A JP 2013063306 A JP2013063306 A JP 2013063306A JP 6080204 B2 JP6080204 B2 JP 6080204B2
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outdoor unit
silencer
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存 吉井
存 吉井
圭輔 関口
圭輔 関口
達也 中田
達也 中田
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Description

本発明は、特に、データセンタ等における空調機群運転時の低騒音化に好適な空調機台数制御方法に関する。   The present invention particularly relates to a method for controlling the number of air conditioners suitable for reducing noise during operation of an air conditioner group in a data center or the like.

近年、情報通信技術の進展に伴い、ICT装置の高速化、大容量化、高密度化が急速に進み、データセンタ(以下、適宜、DCと略記する)においてICT装置冷却のための多数の空調機を必要としている。これに伴い空調屋外機、例えば屋外に置かれる空冷チラー(以下、室外機と総称)の冷却部送風機騒音が問題となっており、データセンタにおける空調システムの低騒音化が求められている。   In recent years, with the progress of information communication technology, the speed, capacity, and density of ICT devices have rapidly increased, and a large number of air conditioners for cooling ICT devices in data centers (hereinafter abbreviated as DC as appropriate). Need a machine. Along with this, cooling unit blower noise of air-conditioning outdoor units, for example, air-cooled chillers (hereinafter referred to as outdoor units) placed outdoors has become a problem, and there is a demand for lower noise in air-conditioning systems in data centers.

室外機の低騒音化に関しては、冷却部に消音器(サイレンサー)を取り付けて吸音する技術が公知である。しかしながら、消音器取り付けにより換気抵抗が増大し、運転効率が低下するという問題がある。この問題を解決するため、吸音材取付位置を工夫して、吸音効果を維持しつつ圧力損失を最小にする消音器に関する技術も提案されている(例えば、特許文献1)。   A technique for absorbing noise by attaching a silencer to a cooling unit is known for reducing the noise of an outdoor unit. However, there is a problem that the ventilation resistance increases due to the installation of the silencer, and the operation efficiency decreases. In order to solve this problem, a technique related to a silencer that minimizes the pressure loss while maintaining the sound absorption effect by devising the sound absorbing material mounting position has been proposed (for example, Patent Document 1).

特開2004−117531号公報JP 2004-117531 A

しかしながら、消音器なし空調機と比較した場合効率低下は免れず、特に、多数の空調機を集中して設置するデータセンタにおいては、省エネルギーの観点から問題となる。さらに、データセンタにおいては信頼性確保の必要から、冗長設計に基づいて多くの予備機を備えており、全てに消音器を装着することは設備コストの観点からも問題となる。
これらのことから、特にデータセンタにおいて低騒音化と高効率運転の両立が求められている。
However, when compared with an air conditioner without a silencer, a reduction in efficiency is inevitable, and particularly in a data center where a large number of air conditioners are installed in a concentrated manner, it becomes a problem from the viewpoint of energy saving. Furthermore, since it is necessary to ensure reliability in the data center, a large number of spare units are provided based on the redundant design, and it is problematic from the viewpoint of equipment costs to install silencers in all of them.
For these reasons, particularly in data centers, it is required to achieve both low noise and high efficiency operation.

本発明はこのような課題を解決するためのものであって、以下の内容をその要旨とする。すなわち、本発明に係る空調システムにおける室外機台数制御方法は、
(1)隣地への騒音影響度に応じてクラス分けされた、複数の冷熱製造室外機の台数制御方法であって、
冷房負荷に対応して、隣地への騒音影響度の少ないクラスに属する室外機を優先的に順次、起動させることを特徴とする。
This invention is for solving such a subject, and makes the following content the summary. That is, the outdoor unit number control method in the air conditioning system according to the present invention,
(1) A method for controlling the number of a plurality of outdoor units for cold-heating manufacturing, classified according to the degree of noise influence on the adjacent land,
Corresponding to the cooling load, outdoor units belonging to a class having a low noise influence on the adjacent land are sequentially activated in order.

(2)上記(1)の発明において、所定の運転条件に該当する場合に限り、前記優先的な起動制御を行うことを特徴とする。
(3)上記発明において、前記所定の運転条件が、運転時間帯が夜間であることを特徴とする。
(4)上記(2)の発明において、前記所定の運転条件が、室外機運転時の隣地境界における騒音値が所定の基準値を超えている場合であることを特徴とする。
(2) The invention according to (1) is characterized in that the preferential activation control is performed only when a predetermined operating condition is satisfied.
(3) In the above invention, the predetermined operating condition is characterized in that an operating time zone is nighttime.
(4) In the invention of (2), the predetermined operating condition is a case where a noise value at an adjacent land boundary during outdoor unit operation exceeds a predetermined reference value.

(5)上記各発明において、前記クラス分けが、室外機への消音器装着の有無に基づくことを特徴とする。 (5) In each of the above inventions, the classification is based on whether or not a silencer is attached to an outdoor unit.

(6)上記各発明において、前記クラス分けが、隣地境界からの室外機の離隔距離に基づくことを特徴とする。 (6) In each of the above inventions, the classification is based on the separation distance of the outdoor unit from the adjacent land boundary.

(7)上記各発明において、前記クラス分けが、室外機への消音器装着有無、及び、隣地境界からの室外機の離隔距離の組み合わせに基づくことを特徴とする。 (7) In each of the above inventions, the classification is based on a combination of the presence / absence of a silencer attached to the outdoor unit and the separation distance of the outdoor unit from the adjacent land boundary.

(8)上記(4)の発明において、運転時間帯が夜間の場合において、冷房負荷に対応して、
第1ステップとして、消音器付室外機を1台ずつ順次、最大出力で起動させ、
第2ステップとして、消音器なし室外機を1台ずつ順次、最大出力で起動させる、
ことを特徴とする。
(8) In the invention of (4) above, when the operation time zone is at night, in response to the cooling load,
As a first step, one outdoor unit with a silencer is sequentially activated at maximum output,
As a second step, one outdoor unit without a silencer is sequentially activated at maximum output.
It is characterized by that.

(9)上記(4)の発明において、消音器付室外機及び消音器なし室外機が、ともにインバータ能力制御機能を備えた室外機であり、かつ、運転時間帯が夜間の場合において冷房負荷に対応して、
第1ステップとして、消音器付室外機を1台ずつ順次、最小出力で起動させ、
第2ステップとして、消音器なし室外機を1台ずつ順次、最小出力で起動させ、
第3ステップとして、消音器付室外機を1台ずつ順次、、最大出力に至るまで能力制御し、
第4ステップとして、消音器なし室外機を1台ずつ順次、最大出力に至るまで能力制御する、ことを特徴とする。
(9) In the invention of (4), the outdoor unit with a silencer and the outdoor unit without a silencer are both outdoor units having an inverter capacity control function, and the cooling load is applied when the operation time zone is nighttime. Correspondingly,
As a first step, one outdoor unit with a silencer is sequentially activated with minimum output,
As a second step, one outdoor unit without a silencer is sequentially activated with minimum output,
As a third step, capacity control is performed for each outdoor unit with silencer one by one until it reaches the maximum output,
As a fourth step, the capacity control is performed sequentially for each outdoor unit without a silencer until the maximum output is reached.

本発明によれば、多数の空調機を集中して設置するデータセンタにおいて、騒音問題を抑制することができる。
また、効率も考慮した群制御とすることにより、省エネルギー化を図ることができる。
さらに、消音器装着の有無によりクラス分けを行う発明にあっては、消音器を装着する空調機数を最低限に抑えることができるため、設備コストの低減化を図ることが可能になる。
ADVANTAGE OF THE INVENTION According to this invention, in a data center which installs many air conditioners centrally, a noise problem can be suppressed.
In addition, energy saving can be achieved by using group control in consideration of efficiency.
Furthermore, in the invention in which the classification is performed depending on whether or not the silencer is mounted, the number of air conditioners to which the silencer is mounted can be minimized, so that the equipment cost can be reduced.

第一の実施形態に係る空調機群台数制御システム1の構成を示す図である。It is a figure which shows the structure of the air-conditioner group number control system 1 which concerns on 1st embodiment. 第一の実施形態の台数制御フローを示す図である。It is a figure which shows the number control flow of 1st embodiment. 第一の実施形態の夜間時間帯における空調機起動順序を概念的に示す図である。It is a figure which shows notionally the air-conditioner starting order in the night time slot | zone of 1st embodiment. 同上の昼間時間帯における空調機起動順序を概念的に示す図である。It is a figure which shows notionally the air-conditioner starting order in a daytime time zone same as the above. 第二の実施形態の台数制御フローを示す図である。It is a figure which shows the number control flow of 2nd embodiment. 第二の実施形態の夜間時間帯における空調機群起動順序を概念的に示す図である。It is a figure which shows notionally the air-conditioner group starting order in the night time zone of 2nd embodiment. 同上の昼間時間帯における空調機起動順序を概念的に示す図である。It is a figure which shows notionally the air-conditioner starting order in a daytime time zone same as the above. 第二の実施形態における空調機群起動順序の別方式を概念的に示す図である。It is a figure which shows notionally another system of the air-conditioner group starting order in 2nd embodiment. 第三の実施形態に係る空調機群台数制御システム30の構成を示す図である。It is a figure which shows the structure of the air conditioning machine group number control system 30 which concerns on 3rd embodiment. 第三の実施形態の台数制御フローを示す図である。It is a figure which shows the number control flow of 3rd embodiment.

以下、本発明の各実施形態について、図1乃至10を参照してさらに詳細に説明する。重複説明を避けるため、各図において同一構成には同一符号を用いている。なお、本発明の範囲は特許請求の範囲記載のものであって、以下の実施形態に限定されないことはいうまでもない。   Hereinafter, each embodiment of the present invention will be described in more detail with reference to FIGS. In order to avoid redundant description, the same reference numerals are used for the same components in the respective drawings. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

(第一の実施形態) (First embodiment)

本実施形態は、運転時間帯により消音器付室外機(又は消音器なし室外機)を優先的に起動させる台数制御の態様に関する。
図1を参照して、本実施形態に係るデータセンタにおける空調機群台数制御システム1は、冷熱源として複数の消音器付室外機(i=1〜m)と、複数の消音器なし室外機Bj(j=1〜n)と、を備えて構成されている。室外機Ai群,室外機Bj群は、それぞれ消音器付又は消音器なし室外機の隣地境界からの許容隣接距離d1以上、d2以上となる位置に配設されている。各室外機で製造される冷熱は、冷媒配管2を介して機械室(図示せず)に循環供給される。
The present embodiment relates to a mode of controlling the number of units that preferentially activates an outdoor unit with a silencer (or an outdoor unit without a silencer) according to an operation time zone.
Referring to FIG. 1, an air conditioner group number control system 1 in a data center according to the present embodiment includes a plurality of silencer-equipped outdoor units (i = 1 to m) and a plurality of silencer-less outdoor units as cooling sources. Bj (j = 1 to n). The outdoor unit Ai group and the outdoor unit Bj group are arranged at positions where the allowable adjacent distance is d1 or more and d2 or more from the adjacent boundary of the outdoor unit with or without the silencer. The cold produced by each outdoor unit is circulated and supplied to the machine room (not shown) via the refrigerant pipe 2.

群ごとの室外機台数、定格冷房出力、総出力を表1の通りとする。なお、説明簡単化のため各室外機は全て同一出力としたが、室外機ごとに異なる出力であってもよい。

Figure 0006080204
Table 1 shows the number of outdoor units, rated cooling output, and total output for each group. For the sake of simplicity, all the outdoor units have the same output, but the output may be different for each outdoor unit.
Figure 0006080204

次に図2乃至4を参照して、本実施形態における室外機台数制御方法について説明する。制御開始に伴い、現在時刻が夜間時間帯(例えば20:00〜8:00)か否かを判定する(S101)。
夜間時間帯の場合には(S101においてY)、低騒音化を図るべく消音器付室外機(A群)優先運転モード(S102〜S106)となる。具体的には、まず現在冷房負荷L(t)が消音器付室外機Aiの総冷房出力Wa以下か否かを判定する(S102)。Wa以下の場合には(S102においてY:図3のL1に該当)、冷房負荷L(t)に見合うよう、順次、室外機Ai(i=1,2、・・・)を定格出力waで起動していく(S103)。
Next, the outdoor unit number control method in the present embodiment will be described with reference to FIGS. With the start of control, it is determined whether the current time is a night time zone (for example, 20: 00 to 8:00) (S101).
In the night time zone (Y in S101), the silencer-equipped outdoor unit (Group A) is preferentially operated (S102 to S106) in order to reduce noise. Specifically, it is first determined whether or not the current cooling load L (t) is equal to or less than the total cooling output Wa of the silencer-equipped outdoor unit Ai (S102). In the case of Wa or less (Y in S102: corresponding to L1 in FIG. 3), the outdoor units Ai (i = 1, 2,...) Are sequentially set at the rated output wa so as to meet the cooling load L (t). It starts up (S103).

S102においてN、すなわちL(t)>Waの場合には(図3のL2に該当)、全ての室外機Aiを定格出力で運転し(S104)、さらに冷房負荷に見合うよう、順次、室外機Bj(j=1,2、・・・)を定格出力wbで起動していく(S105)。以上の制御を夜間時間帯が終了するまで繰り返し行う(S106)。 When N in S102, that is, when L (t)> Wa (corresponding to L2 in FIG. 3), all the outdoor units Ai are operated at the rated output (S104), and the outdoor units are sequentially arranged to meet the cooling load. Bj (j = 1, 2,...) Is started at the rated output wb (S105). The above control is repeated until the night time period ends (S106).

また、現在時刻が夜間時間帯でない場合には(S101においてN)、省エネ性向上を図るべく消音器なし室外機(B群)優先運転モード(S107〜S111)となる。具体的には、まず現在冷房負荷L(t)が消音器なし室外機Biの総冷房出力Wb以下か否かを判定する(S107)。Wb以下の場合には(S102においてY:図4のL3に該当)、冷房負荷L(t)に見合うよう、順次、Bj(j=1,2、・・・)を定格出力wbで起動していく(S108)。   When the current time is not a night time zone (N in S101), the silencerless outdoor unit (group B) priority operation mode (S107 to S111) is set to improve energy saving. Specifically, it is first determined whether or not the current cooling load L (t) is equal to or less than the total cooling output Wb of the silencerless outdoor unit Bi (S107). In the case of Wb or less (Y in S102: corresponding to L3 in FIG. 4), Bj (j = 1, 2,...) Is sequentially started at the rated output wb so as to meet the cooling load L (t). (S108).

S106においてN、すなわちL(t)>Wbの場合には(図4のL4に該当)、全ての室外機Bjを定格出力で運転し(S109)、さらに冷房負荷に見合うよう、順次、室外機Ai(i=1,2、・・・)を定格出力wbで起動していく(S110)。以上の制御を夜間時間帯に至るまで繰り返し行う(S111)。   When N in S106, that is, when L (t)> Wb (corresponding to L4 in FIG. 4), all the outdoor units Bj are operated at the rated output (S109), and the outdoor units are sequentially arranged to meet the cooling load. Ai (i = 1, 2,...) Is started at the rated output wb (S110). The above control is repeated until the night time zone is reached (S111).

なお、本実施形態では起動時の優先順位のロジックについて説明したが、運転停止時については、冷房負荷に応じて起動時とは逆に優先順位の低い空調機から順に停止させていくことになる。以下の実施形態においても同様である。   In the present embodiment, the priority logic at the time of activation has been described, but when the operation is stopped, the air conditioners having lower priorities are sequentially stopped according to the cooling load, contrary to the time of activation. . The same applies to the following embodiments.

また、本実施形態では室外機Ai、Bjの起動順位を常にi=1,2、・・・とする例を示したが、これに限らず、例えばローテーション方式で起動させる態様とすることもできる。以下の各実施形態においても同様である。
また、本実施形態では低騒音室外機の優先的起動の有無を、運転時間帯により判定する例を示したが、他の判定基準、例えば運転時における室外機近傍の騒音値に基づいて行う態様とすることもできる。以下の実施形態においても同様である。
Further, in the present embodiment, an example in which the activation order of the outdoor units Ai, Bj is always set to i = 1, 2,... Is not limited to this, and for example, it may be configured to be activated by a rotation method. . The same applies to the following embodiments.
Moreover, although the example which determines the presence or absence of preferential starting of a low noise outdoor unit in this embodiment was shown by the operation time zone, the aspect performed based on the other judgment criteria, for example, the noise value of the outdoor unit vicinity at the time of operation It can also be. The same applies to the following embodiments.

(第二の実施形態)
次に図5を参照して、本発明の他の実施形態について説明する。本実施形態の構成は上述の実施形態と同一であるので、重複説明を省略する。本実施形態が上述の実施形態と異なる点は、各室外機Ai、Bjの起動制御方法である。すなわち、上述の実施形態では各室外機を最大出力で順次、稼働させていくのに対して、本実施形態では各室外機の起動を2段階で行っていることである。
(Second embodiment)
Next, another embodiment of the present invention will be described with reference to FIG. Since the configuration of the present embodiment is the same as that of the above-described embodiment, redundant description is omitted. The present embodiment is different from the above-described embodiment in the activation control method for the outdoor units Ai and Bj. That is, in the above-described embodiment, each outdoor unit is sequentially operated at the maximum output, whereas in this embodiment, each outdoor unit is activated in two stages.

本実施形態において、各室外機の最低出力、インバータによる出力制御範囲を表2の通りとする。その他の項目については表1と同一とする。

Figure 0006080204
In this embodiment, the minimum output of each outdoor unit and the output control range by the inverter are as shown in Table 2. The other items are the same as in Table 1.
Figure 0006080204

次に図5、6を参照して、本実施形態における室外機台数制御方法について説明する。制御開始に伴い、最初に現在時刻が夜間時間帯(例えば20:00〜8:00)か否かを判定する(S201)。
夜間時間帯の場合には(S201においてY)、低騒音化を図るべくA群室外機を優先的に運転させるため、次に現在の冷房負荷L(t)が消音器付室外機Aiの最小出力の総和Wa'(=Σwa')以下か否かを判定する(S202)。L(t)≦Wa’の場合には(S202においてY)、冷房負荷L(t)に対応して順次、室外機Ai(i=1,2、・・・)を最小出力wa'で起動していく(S203:図5のL6に該当)。
Next, the outdoor unit number control method in this embodiment is demonstrated with reference to FIG. With the start of control, it is first determined whether or not the current time is a night time zone (for example, 20: 00 to 8:00) (S201).
In the case of the night time zone (Y in S201), the current cooling load L (t) is the minimum of the silencer outdoor unit Ai so that the group A outdoor unit is preferentially operated in order to reduce noise. It is determined whether or not the total output Wa ′ (= Σwa ′) or less (S202). When L (t) ≦ Wa ′ (Y in S202), the outdoor units Ai (i = 1, 2,...) Are sequentially activated with the minimum output wa ′ corresponding to the cooling load L (t). (S203: corresponds to L6 in FIG. 5).

S202においてN、すなわちL(t)>Wa'の場合には、次に冷房負荷L(t)が室外機Ai、室外機Bjの最小出力の総和W'=Wa'+Wb'以下か否かを判定する(S204)。
L(t)≦W'の場合には(S204においてY)、全ての室外機Aiを最小出力で運転し、さらに冷房負荷L(t)に対応して順次、室外機Bj(j=1,2、・・・)をを最小出力wb'で起動していく(S205:図6のL7に該当)。
S204においてN、すなわちL(t)>W'の場合には、さらにW'に室外機Aiの最大出力合計値を加えた値(W'+Wa)以下か否かを判定する(S206)。
If N in S202, that is, if L (t)> Wa ′, then whether or not the cooling load L (t) is less than or equal to the sum of the minimum outputs W ′ = Wa ′ + Wb ′ of the outdoor units Ai and Bj is determined. Determine (S204).
When L (t) ≦ W ′ (Y in S204), all the outdoor units Ai are operated at the minimum output, and the outdoor units Bj (j = 1, 1) are sequentially operated corresponding to the cooling load L (t). 2... Are started with the minimum output wb ′ (S205: corresponding to L7 in FIG. 6).
If N in S204, that is, if L (t)> W ′, it is further determined whether or not it is equal to or less than the value obtained by adding the maximum output total value of the outdoor unit Ai to W ′ (W ′ + Wa) (S206).

(W'+Wa)以下の場合には(S206においてY)、全ての室外機Bjを最小出力で運転し、さらに冷房負荷に対応して順次、室外機Ai(i=1,2、・・・)を最大出力に至るまでインバータ制御により能力制御していく(S207:図6のL8に該当)。   In the case of (W ′ + Wa) or less (Y in S206), all the outdoor units Bj are operated at the minimum output, and the outdoor units Ai (i = 1, 2,... ) Is controlled by inverter control until the maximum output is reached (S207: corresponding to L8 in FIG. 6).

S206においてN、すなわちL(t)>(W'+Wa)の場合には、さらに室外機Ai、Bjの最大出力合計値(W)以下か否かを判定する(S208)。
L(t)≦Wの場合には(S208においてY)、全ての室外機Aiを最大出力で運転し、さらに冷房負荷に対応して順次、室外機Bj(j=1,2、・・・)を最大出力に至るまでインバータ制御により能力制御していく(S209:図6のL9に該当)。S209においてN、すなわちL(t)>Wの場合には、全ての室外機Ai、Bjを最大出力で運転する(S210)。
以上の制御を夜間時間帯が終了するまで繰り返し行う(S211)。
If N in S206, that is, if L (t)> (W ′ + Wa), it is further determined whether or not the maximum output total value (W) of the outdoor units Ai and Bj is not more than (S208).
When L (t) ≦ W (Y in S208), all the outdoor units Ai are operated at the maximum output, and the outdoor units Bj (j = 1, 2,... ) Is controlled by inverter control until the maximum output is reached (S209: corresponds to L9 in FIG. 6). In S209, if N, that is, L (t)> W, all the outdoor units Ai and Bj are operated at the maximum output (S210).
The above control is repeated until the night time zone ends (S211).

S201においてN,夜間時間帯でない場合には、室外機Ai、Bjを入れ替えて上述のフローと同様の制御を行う(S211〜S221)。この場合の起動順序は図7のように示される。   In S201, when it is not N and the night time zone, the outdoor units Ai and Bj are replaced and the same control as the above-described flow is performed (S211 to S221). The activation sequence in this case is shown in FIG.

なお、本実施形態では、省エネ性向上と低騒音化の両立を図るべく、低負荷時の稼働台数を多くすることにより、可能な限り熱交換器有効面積を大きくする制御を採用している。
このため、室外機Ai最低出力→室外機Bi最低出力→室外機Aiインバータ制御→室外機Biインバータ制御の順に起動することとした。一方、低騒音化に特化して、図8に示すように室外機Ai最低出力→室外機Aiインバータ制御→室外機Bi最低出力→室外機Biインバータ制御 の順に起動させる制御を採用することもできる。
(第三の実施形態)
In the present embodiment, in order to achieve both energy saving and noise reduction, control is performed to increase the effective area of the heat exchanger as much as possible by increasing the number of operating units at low loads.
For this reason, it was decided to start in order of outdoor unit Ai minimum output-> outdoor unit Bi minimum output-> outdoor unit Ai inverter control-> outdoor unit Bi inverter control. On the other hand, as shown in FIG. 8, it is also possible to employ a control that starts up in the order of minimum outdoor unit Ai output → outdoor unit Ai inverter control → outside unit Bi minimum output → outside unit Bi inverter control, as shown in FIG. .
(Third embodiment)

さらに、本発明の他の実施形態について説明する。本実施形態は隣地境界からの離隔距離を考慮した室外機の台数制御の態様に関する。
図9を参照して、本実施形態に係る空調機群台数制御システム30は、敷地境界からの離隔距離(d1乃至d4)に対応して4つの室外機群(C1乃至C4)に分類している。各室外機群Ci(i=1〜4)には、それぞれ複数の室外機Cij(j=1〜k)が配置されている。各室外機Cijの構成は、上述の実施形態の消音器なし室外機Bjと同一である。
各室外機の台数、定格冷房出力を表1の通りとする。なお、説明簡単化のため各室外機は全て同一出力であるとしているが、全て同一出力としたが、室外機ごとに異なる出力であってもよい。
Furthermore, another embodiment of the present invention will be described. The present embodiment relates to an aspect of controlling the number of outdoor units in consideration of the separation distance from the adjacent land boundary.
Referring to FIG. 9, the air conditioner group number control system 30 according to the present embodiment is classified into four outdoor unit groups (C1 to C4) corresponding to the separation distances (d1 to d4) from the site boundary. Yes. A plurality of outdoor units Cij (j = 1 to k) are arranged in each outdoor unit group Ci (i = 1 to 4). The configuration of each outdoor unit Cij is the same as the silencerless outdoor unit Bj of the above-described embodiment.
Table 1 shows the number of outdoor units and rated cooling output. For simplification of explanation, all the outdoor units are assumed to have the same output, but they are all assumed to have the same output. However, the output may be different for each outdoor unit.

Figure 0006080204
Figure 0006080204

次に図10を参照して、本実施形態における室外機台数制御方法について説明する。制御開始に伴い、最初に現在時刻が夜間時間帯(例えば20:00〜8:00)か否かを判定する(S301)。
夜間時間帯の場合には(S301においてY)、低騒音化を図るべく距離優先運転モード(離隔距離大の室外機群から順に起動)が採用される。具体的には、まず現在の冷房負荷L(t)が室外機群C1の総冷房出力W1以下か否かを判定する(S302)。これに該当する場合には(S302においてY)、冷房負荷L(t)に対応して室外機C1j(j=1〜k)を順次、最大出力w1で起動していく(S303)。
Next, with reference to FIG. 10, the outdoor unit number control method in this embodiment is demonstrated. Along with the start of control, it is first determined whether or not the current time is a night time zone (for example, 20: 00 to 8:00) (S301).
In the case of a night time zone (Y in S301), a distance priority operation mode (starting in order from an outdoor unit group with a large separation distance) is employed to reduce noise. Specifically, it is first determined whether or not the current cooling load L (t) is equal to or less than the total cooling output W1 of the outdoor unit group C1 (S302). If this is the case (Y in S302), the outdoor unit C1j (j = 1 to k) is sequentially activated with the maximum output w1 corresponding to the cooling load L (t) (S303).

S302においてN、すなわちL(t)>W1の場合には、さらにL(t)がΣWi(i=1〜2)以下か否かを判定する(S304)。これに該当する場合には(S304においてY)、全てのC1に加えて冷房負荷L(t)に対応して順次、室外機C2jを定格出力w1で起動していく(S305)。
このように冷房負荷L(t)に対応して、室外機群C1→C2→C3→C4の順に室外機Cijを最大出力で起動させていく(S302〜310)。以上の制御を夜間時間帯が終了するまで繰り返し行う(S311)。
If N in S302, that is, if L (t)> W1, it is further determined whether or not L (t) is equal to or smaller than ΣWi (i = 1 to 2) (S304). If this is the case (Y in S304), the outdoor unit C2j is sequentially activated with the rated output w1 in response to the cooling load L (t) in addition to all C1 (S305).
As described above, the outdoor unit Cij is started up with the maximum output in the order of the outdoor unit group C1 → C2 → C3 → C4 corresponding to the cooling load L (t) (S302 to 310). The above control is repeated until the night time period ends (S311).

また、現在時刻が夜間時間帯でない場合には(S301においてN)、例えば累積運転時間の少ない室外機を優先、又は、ローテーション方式により選定し、冷房負荷L(t)に対応して起動させる制御を行う(S312)。   In addition, when the current time is not a night time zone (N in S301), for example, an outdoor unit with a short cumulative operation time is selected by priority or by a rotation method, and is activated according to the cooling load L (t). Is performed (S312).

なお、本実施形態では各群の室外機を、順次、最大出力で起動させていく例を示したが、第二の実施形態と同様に2段階で台数制御、すなわち、第1ステップとして負荷に対応して各群の室外機を最低出力で起動させ、第2ステップとして各群の室外機をインバータ出力制御により運転させる態様を採用することもできる。   In this embodiment, an example in which the outdoor units of each group are sequentially activated at the maximum output has been shown. However, as in the second embodiment, the number of units is controlled in two stages, that is, the load as the first step. Correspondingly, it is also possible to employ a mode in which the outdoor units of each group are started at the minimum output, and the outdoor units of each group are operated by inverter output control as the second step.

本発明は、情報通信機械室(データセンタ)のみならず、低騒音化が求められる空調システムの台数制御として広く適用可能である。   The present invention can be widely applied not only to information communication machine rooms (data centers) but also to the control of the number of air conditioning systems that require low noise.

1、30・・・・空調機群台数制御システム
Ai・・・・消音器付室外機
Bi、Cij 消音器なし室外機

1, 30... Air conditioning unit group number control system Ai... Outdoor unit with silencer Bi, Cij Outdoor unit without silencer

Claims (9)

隣地への騒音影響度に応じてクラス分けされた、複数の冷熱製造室外機の台数制御方法であって、
冷房負荷に対応して、隣地への騒音影響度の少ないクラスに属する室外機を優先的に順次、起動させることを特徴とする複数室外機の台数制御方法。
A method for controlling the number of multiple outdoor units for cold heat production, classified according to the noise impact on the adjacent land,
A method for controlling the number of outdoor units, wherein the outdoor units belonging to a class having a low noise influence on the adjacent land are sequentially activated in response to a cooling load.
所定の運転条件に該当する場合に限り、前記優先的な起動制御を行うことを特徴とする請求項1に記載の室外機群の台数制御方法。   The method for controlling the number of outdoor units according to claim 1, wherein the preferential start-up control is performed only when a predetermined operating condition is satisfied. 前記所定の運転条件が、運転時間帯が夜間であることを特徴とする請求項2に記載の室外機群の台数制御方法。   The method for controlling the number of outdoor unit groups according to claim 2, wherein the predetermined operating condition is an operation time zone at night. 前記所定の運転条件が、室外機運転時の隣地境界における騒音値が所定の基準値を超えている場合であることを特徴とする請求項2に記載の室外機群の台数制御方法。   The method for controlling the number of outdoor units according to claim 2, wherein the predetermined operating condition is a case where a noise value at an adjacent land boundary during outdoor unit operation exceeds a predetermined reference value. 前記クラス分けが、室外機への消音器装着の有無に基づくことを特徴とする請求項1乃至4のいずれかに記載の室外機群の台数制御方法。   The method for controlling the number of outdoor units according to any one of claims 1 to 4, wherein the classification is based on whether or not a silencer is attached to the outdoor unit. 前記クラス分けが、隣地境界からの室外機の離隔距離に基づくことを特徴とする請求項1乃至4のいずれかに記載の室外機群の台数制御方法。   The method for controlling the number of outdoor units according to any one of claims 1 to 4, wherein the classification is based on a separation distance of the outdoor unit from the boundary of the adjacent land. 前記クラス分けが、室外機への消音器装着の有無、及び、隣地境界からの室外機の離隔距離の組み合わせに基づくことを特徴とする請求項1乃至4のいずれかに記載の室外機群の台数制御方法。   5. The outdoor unit group according to claim 1, wherein the classification is based on a combination of presence / absence of a silencer attached to the outdoor unit and a separation distance of the outdoor unit from the boundary of the adjacent ground. Number control method. 運転時間帯が夜間の場合において、冷房負荷に対応して、
第1ステップとして、消音器付室外機を1台ずつ順次、最大出力で起動させ、
第2ステップとして、消音器なし室外機を1台ずつ順次、最大出力で起動させる、
ことを特徴とする請求項4に記載の室外機群の台数制御方法。
When the operating hours are at night, corresponding to the cooling load,
As a first step, one outdoor unit with a silencer is sequentially activated at maximum output,
As a second step, one outdoor unit without a silencer is sequentially activated at maximum output.
The number control method of the outdoor unit group of Claim 4 characterized by the above-mentioned.
消音器付室外機及び消音器なし室外機が、ともにインバータ能力制御機能を備えた室外機であり、かつ、運転時間帯が夜間の場合において冷房負荷に対応して、
第1ステップとして、消音器付室外機を1台ずつ順次、最小出力で起動させ、
第2ステップとして、消音器なし室外機を1台ずつ順次、最小出力で起動させ、
第3ステップとして、消音器付室外機を1台ずつ順次、、最大出力に至るまで能力制御し、
第4ステップとして、消音器なし室外機を1台ずつ順次、最大出力に至るまで能力制御する、
ことを特徴とする請求項4に記載の室外機群の台数制御方法。
The outdoor unit with a silencer and the outdoor unit without a silencer are both outdoor units having an inverter capacity control function, and in response to the cooling load when the operation time is night,
As a first step, one outdoor unit with a silencer is sequentially activated with minimum output,
As a second step, one outdoor unit without a silencer is sequentially activated with minimum output,
As a third step, capacity control is performed for each outdoor unit with silencer one by one until it reaches the maximum output,
As a 4th step, capacity control is performed until the maximum output is reached, one by one for each outdoor unit without a silencer.
The number control method of the outdoor unit group of Claim 4 characterized by the above-mentioned.
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