JPH02219961A - turbo chiller - Google Patents
turbo chillerInfo
- Publication number
- JPH02219961A JPH02219961A JP4137789A JP4137789A JPH02219961A JP H02219961 A JPH02219961 A JP H02219961A JP 4137789 A JP4137789 A JP 4137789A JP 4137789 A JP4137789 A JP 4137789A JP H02219961 A JPH02219961 A JP H02219961A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- vane
- opening
- air volume
- condenser
- 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.)
- Granted
Links
Landscapes
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ビル等の比較的大規模な空調等に利用される
ターボ冷凍機に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a centrifugal chiller used for relatively large-scale air conditioning of buildings and the like.
（従来の技術）
従来、特開昭５９−１８１８４１３号公報に開示され且
つ第３図に示すように、モータ（Ｍ）で高速回転される
インペラ（Ｆ）をもつターボ圧縮機（Ｔ）と、温水取出
管（Ｑ）を配設する凝縮器（Ｃ）、及び冷水取出管（Ｒ
）を配設する蒸発器（Ｅ）を備え、インペラ（Ｆ）の吸
入側に配設するサクシ日ンベーン（Ｂ）の開度を、コン
トローラ（Ｎ）及びベーンモータ（Ｇ）を介して調節し
、これによる吸入風量の変更で、温水又は冷水負荷にマ
ツチした冷凍能力を発揮できるようにしている。(Prior Art) Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 59-1818413 and shown in FIG. 3, a turbo compressor (T) has an impeller (F) rotated at high speed by a motor (M); A condenser (C) equipped with a hot water outlet pipe (Q), and a cold water outlet pipe (R
), the opening degree of a saccharging vane (B) arranged on the suction side of the impeller (F) is adjusted via a controller (N) and a vane motor (G), By changing the intake air volume, it is possible to achieve a refrigeration capacity that matches the hot water or cold water load.
又、この種ターボ圧縮機（Ｔ）では、その特性として、
同公報において指摘され且つ第４図に示すように、一つ
のベーン開度（例えばＤ２）に対して、蒸発圧力と凝縮
圧力との差圧即ち圧縮機（Ｔ）の吸入側と吐出側との間
に確保すべきへ。In addition, this type of turbo compressor (T) has the following characteristics:
As pointed out in the same publication and shown in Figure 4, for one vane opening (for example, D2), the difference between the evaporation pressure and the condensation pressure, that is, the pressure difference between the suction side and the discharge side of the compressor (T). Should be secured in between.
ド（Ｈ）が増大すると、吸入風量（Ｖ）は暫時減少され
てゆき、ヘッド（Ｈ）が−室以上増大し、吸入風量（Ｖ
）が極端に減少すると、吐出ガスの圧力ひいてはヘッド
（Ｈ）が上下に撮れて運転不能に陥るという所謂サージ
ング現象が起こるため、該サージング現象を回避する手
段が設けられている。すなわち、第３図に示した通り、
温水取出管（Ｑ）に温度検出器（Ａ）を介装し、温水温
度が例えばｔｃ３以上なら、ベーン開度をＤ２以下にし
ないように、又、温水温度が例えばｔｃ２以上なら、ベ
ーン開度をＤ１以下にしないように、それぞれＤ２、Ｄ
ｌを最小ベーン開度として、これより大きな開度で運転
を行い、サージングライン（Ｌ）を越えないようにして
いる。When the head (H) increases, the suction air volume (V) is temporarily reduced, and the head (H) increases by more than -chamber, and the suction air volume (V) decreases.
) is extremely reduced, a so-called surging phenomenon occurs in which the pressure of the discharged gas, and thus the head (H), becomes vertically tilted and becomes inoperable. Therefore, means are provided to avoid this surging phenomenon. That is, as shown in Figure 3,
A temperature detector (A) is installed in the hot water outlet pipe (Q), so that if the hot water temperature is, for example, tc3 or higher, the vane opening degree is not lower than D2, and if the hot water temperature is, for example, tc2 or higher, the vane opening degree is adjusted. D2 and D, respectively, so as not to be less than D1.
L is the minimum vane opening, and operation is performed at a larger opening to avoid exceeding the surging line (L).
（発明が解決しようとする課題）
以上のものでは、サージング現象は回避できるが、例え
ば温水温度をｔｃ３以上確保する場合ニハ、最小ベーン
開度はＤ２となり、該開度Ｄ２以下には小さくできない
ため、冷凍能力が該開度Ｄ２以下で足りるときでも必要
以上の冷凍能力が発揮されてしまうことになり、低能力
運転をカバーできない問題が起こる。又、これを回避す
るため、冷凍能力の要求に基づきベーン開度を設定し、
例えばその開度を小開度のＤ３に設定することにすれば
、温水取出し温度はｔｃ３以上にはできず、取出し温度
の上限値が低く抑えられてしまう新たな問題が起こる。(Problem to be Solved by the Invention) With the above, the surging phenomenon can be avoided, but for example, if the hot water temperature is to be maintained at tc3 or higher, the minimum vane opening will be D2, and the opening cannot be reduced below D2. Even when the refrigeration capacity is sufficient at the opening degree D2 or less, a refrigeration capacity higher than necessary will be exhibited, causing a problem that it cannot cover low capacity operation. In addition, to avoid this, the vane opening degree is set based on the refrigerating capacity requirements.
For example, if the opening degree is set to D3, which is a small opening degree, the hot water take-out temperature cannot be higher than tc3, and a new problem arises in that the upper limit value of the take-out temperature is kept low.
更に、一般に温水取出しを行う場合には、単に凝縮器（
Ｃ）を水冷すべく温水取出管（Ａ）に常時冷却水を循環
させる場合に比べて、同じヘッドであっても凝縮圧力つ
まり吐出圧力が総じて高いため、取出すべき温水温度が
高くなったり、又、ベーン開度を絞って低容量で運転を
行ったりすると、吐出ガスの圧力がサージングを起こす
前に、吐出ガスの温度がこの種ターボ冷凍機に通常用い
られる冷媒、フロン１１の分解温度（１０６℃）に達し
てしまうため、吐出ガスの温度に基づいてベーン開度制
御を行うべきである。Furthermore, when hot water is generally taken out, a condenser (
Compared to the case where cooling water is constantly circulated through the hot water outlet pipe (A) in order to water-cool C), the condensing pressure, that is, the discharge pressure is generally higher even with the same head, so the hot water temperature to be extracted may be higher, or When operating at a low capacity by reducing the vane opening, the temperature of the discharged gas may rise to the decomposition temperature (106 ℃), the vane opening degree should be controlled based on the temperature of the discharged gas.
本発明の目的は、吐出ガス温度を管理して、吐出ガス温
度が冷媒分解温度を越えないようにベーン開度調節を行
い、かつ、要求能力以上のベーン開度で運転される場合
、その冷凍能力の増大をホットガスバイパスにより是正
することにより、負荷にマツチした運転が行えながら比
較的高い温度の温水を取出すことができるターボ冷凍機
を搗供する点にある。The object of the present invention is to control the discharge gas temperature, adjust the vane opening so that the discharge gas temperature does not exceed the refrigerant decomposition temperature, and when operating at a vane opening greater than the required capacity, the refrigeration The object of the present invention is to provide a turbo chiller that can take out hot water at a relatively high temperature while being able to operate in a manner that matches the load by correcting the increase in capacity with a hot gas bypass.
（課題を解決するための手段）
そこで、本発明では、サクションベーン（１４）の開度
調節による吸入風量の変更で能力制御可能としたターボ
圧縮機（１）と、凝縮器（２）、膨張機構（３）及び蒸
発器（４）を順次接続して冷凍サイクルを構成し、前記
凝縮器（２）に配設する温水取出管（２０）に温水を生
成するようにした構成において、前記圧縮機（１）から
吐出した吐出ガスを前記凝縮器（２）での凝縮作用及び
膨張機構（３）での膨張作用を行わせずに前記蒸発器（
４）に導入するホットガスバイパス路（５）を設けて、
このバイパス路（５）に開度調節可能としたホットガス
弁（θ）を介装する一方、前記吐出ガスの温度を検出す
る温度検出器（７）と、該温度検出器（７）での検出ｍ
度が冷媒の分解温度近くに達したとき、前記ベーン（１
４）の開度を増大させて吸入風量を増加し、かつ、前記
ホットガス弁（６）の開度を増大させて前記吸入風量の
増加による能力上昇を抑制する開度制御手段（８）を設
けることにした。(Means for Solving the Problems) Therefore, in the present invention, a turbo compressor (1) whose capacity can be controlled by changing the intake air volume by adjusting the opening degree of the suction vane (14), a condenser (2), an expansion In a configuration in which a mechanism (3) and an evaporator (4) are sequentially connected to constitute a refrigeration cycle, and hot water is generated in a hot water take-out pipe (20) disposed in the condenser (2), the compression The discharged gas discharged from the machine (1) is not condensed in the condenser (2) and expanded in the expansion mechanism (3).
4) by providing a hot gas bypass path (5) to be introduced into the
This bypass passage (5) is equipped with a hot gas valve (θ) whose opening degree can be adjusted, and a temperature detector (7) for detecting the temperature of the discharged gas, and a temperature detector (7) that detects the temperature of the discharged gas. detection m
When the temperature reaches near the decomposition temperature of the refrigerant, the vane (1
4) an opening control means (8) for increasing the intake air volume by increasing the opening of the hot gas valve (6), and for suppressing an increase in capacity due to the increase in the intake air volume by increasing the opening of the hot gas valve (6); I decided to set it up.
（作用）
あるベーン開度で運転を行っている場合に、吐出ガスの
温度が分解温度近くに達したときには、サクションベー
ン（１４）の開度が増大されて、吸入風量が増加され、
これにより、吐出ガスの温度が低減される。又、この増
大されたベーン開度においては、増大前のベーン開度で
前記分解温度に基づいて制限される取出し温水温度の上
限値よりも高い上限値を得ることができるため、温水の
取出し温度を増大できることになる。(Function) When operating at a certain vane opening and the temperature of the discharged gas reaches near the decomposition temperature, the opening of the suction vane (14) is increased and the suction air volume is increased.
This reduces the temperature of the discharged gas. In addition, with this increased vane opening, it is possible to obtain a higher upper limit value than the upper limit of the hot water withdrawal temperature that is limited based on the decomposition temperature at the vane opening before the increase, so the hot water withdrawal temperature can be increased. This means that it is possible to increase the
一方、サクシロンベーン（２）の開度増大により冷凍能
力が増加しようとするが、吐出ガスの一部は、ホットガ
スバイパス路（６）を介し、凝縮器（２）での凝縮作用
及び膨張ｅｌＨｊｌ（３）での膨張作用を経ないで蒸発
器（４）に導入されるため、該蒸発器（４）での冷却効
果の減少により、その増加分は抑制できることになる。On the other hand, although the refrigerating capacity attempts to increase by increasing the opening degree of the succiron vane (2), a part of the discharged gas passes through the hot gas bypass path (6) and undergoes condensation and expansion in the condenser (2). Since it is introduced into the evaporator (4) without undergoing the expansion action at elHjl (3), the increase can be suppressed by reducing the cooling effect in the evaporator (4).
（実施例）
第１図に示すものは、モータ（１０）及び増速機（１１
）で高速回転されるインペラ（１２）と、ベーンモータ
（１３）で開度調節されるサクションベーン（１４）を
もつターボ圧縮機（１）を備え、その吐出側に、温水取
出管（２０）を配役する凝縮器（２）並びに、フロート
弁から成る膨張機構（３）、及び冷水取出管（４ｏ）を
配設する蒸発器（４）を順次接続し、冷凍サイクルを構
成したものである。(Example) What is shown in Fig. 1 is a motor (10) and a speed increaser (11).
), and a turbo compressor (1) having a suction vane (14) whose opening is adjusted by a vane motor (13), and a hot water outlet pipe (20) on the discharge side. A refrigerating cycle is constructed by sequentially connecting a condenser (2), an expansion mechanism (3) consisting of a float valve, and an evaporator (4) equipped with a cold water outlet pipe (4o).
そして、前記凝縮器（２）の入口部と蒸発器（４）の入
口部との間に、前記圧縮機（１）から吐出した吐出ガス
を、前記凝縮器（２）での凝縮作用及び膨張機構（３）
での膨張作用を行わせずに蒸発器（４）に導入するホッ
トガスバイパス路（５）を設けて、該バイパス路（５）
に開度調節可能としたホットガス弁（６）を介ａする。Then, between the inlet of the condenser (2) and the inlet of the evaporator (4), the discharge gas discharged from the compressor (1) is condensed and expanded in the condenser (2). Mechanism (3)
A hot gas bypass path (5) is provided to introduce the hot gas into the evaporator (4) without performing an expansion action in the bypass path (5).
A hot gas valve (6) whose opening degree can be adjusted is provided.
又、吐出ガスの流通する吐出ガス管（１５）に、温度検
出器（７）を介装すると共に、該温度検出器（７）の検
出温度が、冷媒ガスの分解温度近くに達したとき、ベー
ンモータ（１３）を介して前記ベーン（１４）の開度を
増大させ、かつ、前記ホットガス弁（６）の開度を増大
させて前記吸入風量の増加による能力上昇を抑制する開
度制御手段（８）を設ける。Further, a temperature detector (7) is installed in the discharge gas pipe (15) through which the discharge gas flows, and when the detected temperature of the temperature detector (7) reaches near the decomposition temperature of the refrigerant gas, Opening degree control means for increasing the opening degree of the vane (14) via the vane motor (13) and increasing the opening degree of the hot gas valve (6) to suppress an increase in capacity due to an increase in the intake air volume. (8) shall be provided.
以上の構成により、第２図に示すように、今あるベーン
開度（例えばＤ２）で運転を行っている場合に、吐出ガ
スの温度が分解温度（ｔｄｎ）近くに達したとき、サク
シ１ンベーン（１４）の開度がＤｌに増大されて、イン
ペラ（１２）に吸入される吸入風量が増加され、吐出ガ
スの温度が低減される。又、ベーン開度がＤｌに増大さ
れることから、該開度Ｄ１での冷媒分解温度（ｔｄｎ）
までヘッド（Ｈ）を増大できるため、取出し温度をｔｃ
３から増大された開度Ｄ１における冷媒分解温度近くの
ｔｃ２にまで増大できることになる。With the above configuration, as shown in Fig. 2, when operating at the current vane opening (for example, D2), when the temperature of the discharged gas reaches near the decomposition temperature (tdn), (14) is increased to Dl, the amount of air taken into the impeller (12) is increased, and the temperature of the discharged gas is reduced. In addition, since the vane opening degree is increased to Dl, the refrigerant decomposition temperature (tdn) at the opening degree D1
The head (H) can be increased up to tc.
3 to tc2, which is close to the refrigerant decomposition temperature at the increased opening D1.
一方、サクシぼンベーン（２）の開度増大により冷凍能
力が増加しようとするが、吐出ガスの一部は、ホットガ
スバイパス路（６）を介し、凝縮器（２）での凝縮作用
及び膨張機構（３）での膨張作用を経ないで蒸発器（４
）に導入されるため、該蒸発器（４）での冷却効果の減
少により、その増加分は抑制できることになる。On the other hand, although the refrigerating capacity attempts to increase by increasing the opening degree of the succinct vane (2), a part of the discharged gas passes through the hot gas bypass path (6) and undergoes condensation and expansion in the condenser (2). The evaporator (4) does not undergo the expansion action in the mechanism (3).
), the increase can be suppressed by reducing the cooling effect in the evaporator (4).
これにより、負荷にマツチした能力運転が行えながら、
吐出ガス温度は冷媒ガスの分解温度以下に抑制でき、か
つ、温水取出管（２０）に比較的高温の温水が取出せる
のである。This allows for capacity operation that matches the load.
The discharge gas temperature can be suppressed to below the decomposition temperature of the refrigerant gas, and relatively high temperature hot water can be taken out to the hot water take-out pipe (20).
（発明の効果）
以上、本発明では、吐出ガスの温度が分解温度近くに達
したときには、サクシロンベーン（１４）の開度増大に
より吸入風量を増加すると共に、この吸入風量の増加に
よる冷凍能力の増加分はホットガスバイパスにより是正
するようにしたから、負荷にマツチした能力運転が行え
ながら、吐出ガス温度は冷媒ガスの分解温度以下に抑制
でき、かつ、温水取出管（２０）に比較的高温の温水が
取出せるのである。(Effects of the Invention) As described above, in the present invention, when the temperature of the discharged gas reaches near the decomposition temperature, the suction air volume is increased by increasing the opening degree of the succilon vane (14), and the refrigerating capacity is increased by increasing the suction air volume. Since the increase in the amount of water is corrected by hot gas bypass, the discharge gas temperature can be suppressed to below the decomposition temperature of the refrigerant gas while performing capacity operation that matches the load. High-temperature hot water can be extracted.
第１図は本発明冷凍機の冷媒配管系統図、第２図は同作
用を説明する図、第３図は従来例の冷媒配管系統図、第
４図はその問題点を説明する図である。
（１）・・・・ターボ圧縮機
（２）・・・・凝縮器
（３）・・・・膨張機構
（４）・・・・蒸発器
（５）・・・・ホットガスバイパス路
（６）・・・・ホットガス弁
（７）・・・・温度検出器
（８）・・・・開度制御手段
（１４）・・・・サクシ日ンベーン
（２０）・・・・温水取出管
第１図
第２図Fig. 1 is a refrigerant piping system diagram of the refrigerator of the present invention, Fig. 2 is a diagram explaining the same function, Fig. 3 is a refrigerant piping system diagram of a conventional example, and Fig. 4 is a diagram explaining the problems. . (1)... Turbo compressor (2)... Condenser (3)... Expansion mechanism (4)... Evaporator (5)... Hot gas bypass path (6 )...Hot gas valve (7)...Temperature detector (8)...Opening control means (14)...Sakuri sun vane (20)...Hot water outlet pipe No. Figure 1 Figure 2
Claims (1)
変更で能力制御可能としたターボ圧縮機（１）と、凝縮
器（２）、膨張機構（３）及び蒸発器（４）を順次接続
して冷凍サイクルを構成し、前記凝縮器（２）に配設す
る温水取出管（２０）に温水を生成するようにしたター
ボ冷凍機において、前記圧縮機（１）から吐出した吐出
ガスを前記凝縮器（２）での凝縮作用及び膨張機構（３
）での膨張作用を行わせずに前記蒸発器（４）に導入す
るホットガスバイパス路（５）を設けて、このバイパス
路（５）に開度調節可能としたホットガス弁（６）を介
装する一方、前記吐出ガスの温度を検出する温度検出器
（７）と、該温度検出器（７）での検出温度が冷媒の分
解温度近くに達したとき、前記ベーン（１４）の開度を
増大させて吸入風量を増加し、かつ、前記ホットガス弁
（６）の開度を増大させて前記吸入風量の増加による能
力上昇を抑制する開度制御手段（８）を設けたことを特
徴とするターボ冷凍機。A turbo compressor (1) whose capacity can be controlled by changing the intake air volume by adjusting the opening of the suction vane (14), a condenser (2), an expansion mechanism (3) and an evaporator (4) are connected in sequence. In a turbo chiller that forms a refrigeration cycle and generates hot water in a hot water outlet pipe (20) disposed in the condenser (2), the discharge gas discharged from the compressor (1) is transferred to the condenser. (2) Condensation action and expansion mechanism (3
) is provided with a hot gas bypass passage (5) for introducing the hot gas into the evaporator (4) without performing an expansion action, and a hot gas valve (6) whose opening degree is adjustable is provided in the bypass passage (5). On the other hand, a temperature detector (7) is provided to detect the temperature of the discharged gas, and when the temperature detected by the temperature detector (7) reaches near the decomposition temperature of the refrigerant, the vane (14) is opened. and an opening control means (8) for increasing the intake air volume by increasing the intake air volume, and increasing the opening of the hot gas valve (6) to suppress an increase in capacity due to the increase in the intake air volume. Features of the turbo chiller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041377A JPH0816564B2 (en) | 1989-02-20 | 1989-02-20 | Turbo refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041377A JPH0816564B2 (en) | 1989-02-20 | 1989-02-20 | Turbo refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02219961A true JPH02219961A (en) | 1990-09-03 |
| JPH0816564B2 JPH0816564B2 (en) | 1996-02-21 |
Family
ID=12606719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1041377A Expired - Lifetime JPH0816564B2 (en) | 1989-02-20 | 1989-02-20 | Turbo refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816564B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100376786B1 (en) * | 2000-07-29 | 2003-03-19 | 만도공조 주식회사 | Apparatus For Control Refrigerant Of Turbo Refrigerator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5364854A (en) * | 1976-11-22 | 1978-06-09 | Ebara Corp | Capacity controlling method of turbo freezer |
| JPS6387557A (en) * | 1986-10-01 | 1988-04-18 | ス−パ−ヒ−トポンプ・エネルギ−集積システム技術研究組合 | Heat pump |
-
1989
- 1989-02-20 JP JP1041377A patent/JPH0816564B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5364854A (en) * | 1976-11-22 | 1978-06-09 | Ebara Corp | Capacity controlling method of turbo freezer |
| JPS6387557A (en) * | 1986-10-01 | 1988-04-18 | ス−パ−ヒ−トポンプ・エネルギ−集積システム技術研究組合 | Heat pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100376786B1 (en) * | 2000-07-29 | 2003-03-19 | 만도공조 주식회사 | Apparatus For Control Refrigerant Of Turbo Refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0816564B2 (en) | 1996-02-21 |
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