JPH0794944B2 - refrigerator - Google Patents
refrigeratorInfo
- Publication number
- JPH0794944B2 JPH0794944B2 JP15625890A JP15625890A JPH0794944B2 JP H0794944 B2 JPH0794944 B2 JP H0794944B2 JP 15625890 A JP15625890 A JP 15625890A JP 15625890 A JP15625890 A JP 15625890A JP H0794944 B2 JPH0794944 B2 JP H0794944B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- cooling
- pipe
- water pump
- refrigerator
- 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 - Fee Related
Links
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は冷凍機に関し、特に水冷冷凍機と冷却塔とを配
管接続した冷凍機に関する。The present invention relates to a refrigerator, and more particularly to a refrigerator in which a water-cooled refrigerator and a cooling tower are connected by piping.
（ロ）従来の技術 例えば特公昭59−12843号公報には、圧縮式冷凍機と冷
却塔とを冷却水往き配管と冷却水戻り配管とで接続し、
この冷却水戻り配管と冷却水往き配管に設けられた冷却
水ポンプの上流側とをバイパス管で接続し、このバイパ
ス管と冷却水往き配管との接続箇所に三方弁を設けた冷
却水循環回路が開示されている。(B) Conventional technology For example, in Japanese Patent Publication No. 59-12843, a compression type refrigerator and a cooling tower are connected by a cooling water going pipe and a cooling water returning pipe,
This cooling water return pipe and the upstream side of the cooling water pump provided in the cooling water outflow pipe are connected by a bypass pipe, and a cooling water circulation circuit is provided in which a three-way valve is provided at the connection point between this bypass pipe and the cooling water outflow pipe. It is disclosed.
（ハ）発明が解決しようとする課題 上記従来の技術において、例えば圧縮式冷凍機の起動
時、三方弁を冷却塔、バイパス管、及び冷却水ポンプ側
に開き、冷却水ポンプを運転した場合には、冷却水ポン
プはバイパス管に残っていた空気を吸い込む。ここで、
冷却水ポンプが例えば横倒しに設置されたラインポンプ
の場合にはポンプにエア溜りが発生する。その後、空気
が冷却水ポンプから抜け、冷却水ポンプの吐出圧が上昇
するが、このとき、冷却水戻り配管の冷却塔側の開口か
ら冷却水戻り配管、バイパス管、及び冷却水往き配管を
経て冷却塔に至る空気の抜け道が形成される。このた
め、冷却水ポンプの吐出圧が上昇し、バイパス管に残っ
ていた空気が冷却水ポンプに吸い込まれエアかみが発生
する。そして、冷却水ポンプの吐出圧が僅かになったと
き、空気が冷却水往き配管を経て冷却塔及び冷凍機へ流
れ、同時に冷却水戻り配管の冷却塔側の開口から空気が
引かれる。上記開口から引かれた空気はバイパス管内に
残り、冷却水ポンプのエアの排出によりエアかみが解消
したときバイパス管内の空気は冷却水ポンプに引かれ再
びエアかみが発生する。以後、冷却水ポンプがエアかみ
とエアの排出とを繰り返し、冷凍機の運転が不安定にな
ると共に、冷却水ポンプに故障が発生するおそれがあ
る。(C) Problems to be Solved by the Invention In the above-mentioned conventional technique, for example, when the compression refrigerator is started, the three-way valve is opened to the cooling tower, the bypass pipe, and the cooling water pump side to operate the cooling water pump. The cooling water pump sucks in the air remaining in the bypass pipe. here,
If the cooling water pump is, for example, a line pump installed horizontally, air will be accumulated in the pump. After that, air escapes from the cooling water pump, and the discharge pressure of the cooling water pump rises, but at this time, the cooling water return pipe, the bypass pipe, and the cooling water going pipe are passed from the cooling tower side opening of the cooling water return pipe. An escape path for air to the cooling tower is formed. For this reason, the discharge pressure of the cooling water pump rises, and the air remaining in the bypass pipe is sucked into the cooling water pump, causing air entrainment. Then, when the discharge pressure of the cooling water pump becomes small, air flows through the cooling water going pipe to the cooling tower and the refrigerator, and at the same time, air is drawn from the opening on the cooling tower side of the cooling water return pipe. The air drawn from the opening remains in the bypass pipe, and when the air blow is eliminated by the discharge of air from the cooling water pump, the air in the bypass pipe is pulled by the cooling water pump and air blow is generated again. After that, the cooling water pump repeats air entrainment and air discharge, which makes the operation of the refrigerator unstable and may cause a failure in the cooling water pump.
又、上記のような頻繁なエアかみを防止するために、冷
却水ポンプを例えば冷却塔の下部に縦置きに設置した場
合には、冷却塔下部の冷却水ポンプの設置空間が大きく
なり、冷却塔のコンパクト化が難しくなるという問題が
発生する。Further, in order to prevent the above frequent air biting, when the cooling water pump is installed vertically, for example, in the lower part of the cooling tower, the installation space of the cooling water pump in the lower part of the cooling tower becomes large, There is a problem that it becomes difficult to make the tower compact.
本発明は冷却水ポンプのエアかみを抑え、かつ、冷却塔
のコンパクト化を図ることを目的とする。An object of the present invention is to suppress air entrainment of a cooling water pump and to make a cooling tower compact.
（ニ）課題を解決するための手段 本発明は上記課題を解決するために、冷却塔（１）と水
冷冷凍機（２）とを冷却水ポンプ（15）を備えた冷却水
往き配管（８）と冷却水戻り配管（10）とで接続し、冷
却水ポンプ（15）の吸込側の冷却水往き配管（８）と冷
却水戻り配管（10）とを冷却水バイパス管（21）で接続
した冷凍機において、冷却水バイパス管（21）と冷却水
往き配管（８）との接続点（8A）より上流の冷却水往き
配管（８）に冷却塔（１）から冷却水ポンプ（15）への
流れを許容する逆止弁（16）を設けた冷凍機を提供する
ものである。(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a cooling water (1) and a water-cooled refrigerator (2) with a cooling water outflow pipe (8) equipped with a cooling water pump (15). ) And the cooling water return pipe (10), and the cooling water going pipe (8) on the suction side of the cooling water pump (15) and the cooling water return pipe (10) are connected by the cooling water bypass pipe (21). In the refrigerating machine, the cooling water pump pipe (15) from the cooling tower (1) to the cooling water going pipe (8) upstream of the connection point (8A) between the cooling water bypass pipe (21) and the cooling water going pipe (8). The present invention provides a refrigerator provided with a check valve (16) that allows the flow to the.
又、冷却塔（１）下部の水槽（５）と水冷冷凍機（２）
とを冷却水往き配管（８）で接続し、水冷冷凍機（２）
と冷却塔（１）とを冷却水戻り配管（10）で接続し、冷
却水往き配管（８）に冷却水ポンプ（15）を設けた冷凍
機において、冷却水ポンプ（15）を横倒しに水槽（５）
の下方に設け、冷却水ポンプ（15）の吸込側の冷却水往
き配管（８）と水槽（５）の水面より上方の冷却水戻り
配管（10）とを冷却水バイパス管（21）で接続し、か
つ、この冷却水バイパス管（21）と冷却水往き配管
（８）との接続点（8A）より上流の冷却水往き配管
（８）に接続点（8A）から冷却塔（１）への流れを止め
る逆止弁（16）を設けた冷凍機を提供するものである。Also, the water tank (5) and the water-cooled refrigerator (2) under the cooling tower (1)
Are connected with a cooling water going pipe (8), and a water cooling refrigerator (2)
In the refrigerator in which the cooling water return pipe (10) is connected to the cooling tower (1), and the cooling water pump (15) is provided in the cooling water outgoing pipe (8), the cooling water pump (15) is laid sideways. (5)
Which is provided below the cooling water pump (15) and connects the cooling water going pipe (8) on the suction side of the cooling water pump (15) and the cooling water return pipe (10) above the water surface of the water tank (5) with the cooling water bypass pipe (21). In addition, from the connection point (8A) between the cooling water bypass pipe (21) and the cooling water outflow pipe (8) to the cooling water outflow pipe (8) upstream from the connection point (8A) to the cooling tower (1). It is intended to provide a refrigerator provided with a check valve (16) for stopping the flow of.
（ホ）作 用 冷凍機の起動時などに、冷却水ポンプ（15）が運転を開
始し、冷却水ポンプ（15）が冷却水バイパス管（21）に
残っていた空気を吸い込み、エアかみが発生し、冷却水
ポンプ（15）の吐出圧が急激に低下したとき、冷却水バ
イパス管（21）を流れて来た空気が冷却水往き配管
（８）を逆流して冷却塔（１）へ流れることを逆止弁
（16）によって阻止し、冷却水バイパス管（21）に空気
が吸い込まれることを防止し、冷却水ポンプ（15）にエ
アかみと空気の排出との繰り返しが発生することを回避
し、冷却水ポンプ（15）による冷却水の循環を安定させ
ることが可能になる。(E) Operation When the refrigerator is started, the cooling water pump (15) starts operation, and the cooling water pump (15) sucks in the air remaining in the cooling water bypass pipe (21), causing air clogging. When the air pressure is generated and the discharge pressure of the cooling water pump (15) suddenly drops, the air flowing through the cooling water bypass pipe (21) flows backward through the cooling water going pipe (8) to the cooling tower (1). The flow is blocked by the check valve (16), the air is prevented from being sucked into the cooling water bypass pipe (21), and the cooling water pump (15) is repeatedly blown with air and discharged. It is possible to avoid the above and stabilize the circulation of the cooling water by the cooling water pump (15).
又、冷凍機の起動時などに、横倒しに設けられた冷却水
ポンプ（15）にエア溜りが発生し、エアかみが発生した
場合に、冷却水バイパス管（21）から冷却水往き配管
（８）へ流れて来た空気が水槽（５）へ流れることは逆
止弁（16）によって阻止され、冷却水バイパス管（21）
に空気が再び吸い込まれることを防止し、冷却水ポンプ
（15）にエアかみとエアの排出との繰り返しが発生する
ことを回避し、冷却水ポンプ（15）の運転を安定させる
ことが可能になる。又、冷却水ポンプ（15）を横倒しに
設け、冷却塔（１）の高さを抑え、冷却塔（１）のコン
パクト化を図ることが可能になる。In addition, when air is generated in the cooling water pump (15) provided sideways when the refrigerator is started and air entrainment occurs, the cooling water bypass pipe (21) is used to pass the cooling water outflow pipe (8). ) Is blocked by the check valve (16), and the cooling water bypass pipe (21) is blocked.
It is possible to prevent air from being sucked into the cooling water pump (15) again, avoid repeated air biting and discharging of the cooling water pump (15), and stabilize the operation of the cooling water pump (15). Become. Further, the cooling water pump (15) is provided sideways to suppress the height of the cooling tower (1), and the cooling tower (1) can be made compact.
（ヘ）実施例 以下、本発明の一実施例を図面に基づいて詳細に説明す
る。(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
図面において、（１）は冷却塔、（２）は例えば吸収冷
凍機などの水冷冷凍機である。（３）は冷却塔送風機、
（４）は冷却装置、（4A）は空気吸込口、（５）は水槽
であり、この水槽（５）にフロート弁（6A）を備えた自
動給水装置（６）が設けられている。又、水槽（５）の
下方には機械室（5A）が設けられ、この機械室（5A）に
後述する冷却水ポンプ等が設けられている。（７）は水
冷冷凍機の例えば凝縮器と吸収器に設けられた熱交換器
であり、この熱交換器（７）と冷却塔（１）とは冷却水
往き配管（８）と冷却水戻り配管（10）とで接続されて
いる。ここで（11）は冷却塔冷水出口、（12）は冷凍機
入口、（13）は冷凍機出口、（14）は冷却塔温水入口で
ある。（15）は冷却水往き配管（８）の途中に設けられ
た冷却水ポンプ（例えばラインポンプ）であり、この冷
却水ポンプ（15）は機械室（5A）に横倒しに設けられ、
冷却水ポンプ（15）が空気を吸い込んだ場合には内部に
エア溜りが発生する。又、（16）は冷却水ポンプ（15）
の上流の冷却水往き配管（８）に設けられた逆止弁であ
り、この逆止弁（16）は図面に実線矢印で示したように
冷却塔冷水出口（11）から冷却水ポンプ（15）への流れ
を許容し、冷却水ポンプ（15）から冷却塔冷水出口（1
1）の方向へは冷水、及び空気を流さない。（17）は流
量調節弁、（18）は冷却水温度検出器であり、それぞれ
は冷却水ポンプ（15）の下流の冷却水往き配管（８）に
設けられている。In the drawings, (1) is a cooling tower, and (2) is a water-cooled refrigerator such as an absorption refrigerator. (3) is a cooling tower blower,
(4) is a cooling device, (4A) is an air inlet, (5) is a water tank, and this water tank (5) is provided with an automatic water supply device (6) equipped with a float valve (6A). Further, a machine room (5A) is provided below the water tank (5), and a cooling water pump and the like described later are provided in the machine room (5A). (7) is a heat exchanger provided in, for example, a condenser and an absorber of the water-cooled refrigerator, and the heat exchanger (7) and the cooling tower (1) are provided with a cooling water going pipe (8) and a cooling water return pipe. It is connected with the pipe (10). Here, (11) is a cooling tower cold water outlet, (12) is a refrigerator inlet, (13) is a refrigerator outlet, and (14) is a cooling tower hot water inlet. (15) is a cooling water pump (for example, a line pump) provided in the middle of the cooling water going pipe (8), and the cooling water pump (15) is provided sideways in the machine room (5A),
When the cooling water pump (15) sucks in air, an air pool is generated inside. Also, (16) is a cooling water pump (15)
Is a check valve provided in the cooling water outflow pipe (8) upstream of the cooling water pumping pipe (15) from the cooling tower cooling water outlet (11) as indicated by a solid arrow in the drawing. ) To the cooling tower chilled water outlet (1
Do not run cold water or air in the direction of 1). Reference numeral (17) is a flow rate control valve, and (18) is a cooling water temperature detector, each of which is provided in the cooling water going pipe (8) downstream of the cooling water pump (15).
（21）は冷却水バイパス管であり、この冷却水バイパス
管（21）の一端は冷却水戻り配管（10）の途中に接続さ
れ、他端は逆止弁（16）と冷却水ポンプ（15）との間の
冷却水往き配管（８）の途中に接続されている。ここ
で、（8A）は冷却水バイパス管（21）と冷却水往き配管
（８）との接続点である。（22）は開閉弁であり、この
開閉弁（22）は冷却水バイパス管（21）の途中に設けら
れている。(21) is a cooling water bypass pipe, one end of this cooling water bypass pipe (21) is connected in the middle of the cooling water return pipe (10), and the other end is a check valve (16) and a cooling water pump (15). ) Is connected in the middle of the cooling water outgoing pipe (8). Here, (8A) is a connection point between the cooling water bypass pipe (21) and the cooling water outgoing pipe (8). (22) is an on-off valve, and this on-off valve (22) is provided in the middle of the cooling water bypass pipe (21).
（23）は冷凍機の制御装置であり、この制御装置（23）
は冷却水温度検出器（18）から温度データを入力し、開
閉弁（22）へ開閉信号を出力し、冷却塔送風機（３）及
び冷却水ポンプ（15）へ運転信号又は停止信号を出力す
る。又、制御装置（23）は水冷冷凍機（２）の運転を制
御する。(23) is a control device for the refrigerator, and this control device (23)
Inputs temperature data from the cooling water temperature detector (18), outputs an opening / closing signal to the opening / closing valve (22), and outputs an operation signal or a stop signal to the cooling tower blower (3) and the cooling water pump (15). . Further, the control device (23) controls the operation of the water cooling refrigerator (2).
以下、上記冷凍機の動作について説明する。例えば冬
期、或いは冬期と夏期との間の中間期の水冷冷凍機
（２）の停止時には冷却水の凍結を防止するために、冷
却塔（１）の水槽（５）の冷却水、及び各配管（８），
（10）、冷却水バイパス管（21）などの冷却水は外部に
排出されている。ここで、冷凍機を起動するときには、
まず、冷却水が自動給水装置（６）から水槽（５）へ供
給される。水槽（５）に冷却水が溜ると、制御装置（2
3）が冷却水ポンプ（15）へ運転信号を出力すると共
に、開閉弁（22）へ開信号を出力する。すると、冷却水
ポンプ（15）より上流の冷却水往き配管（８）及び水槽
（５）に溜っていた冷却水が冷却水ポンプ（15）に吸い
込まれ、吐出される。又、冷却水バイパス管（21）に溜
っていた冷却水が冷却水ポンプ（15）に吸い込まれる。
ここで、冷却水ポンプ（15）から吐出された冷却水の温
度が低く、所定温度（例えば25℃）以下の場合には、冷
却水温度検出器（18）から温度データを入力した制御装
置（23）は開閉弁（22）へ開信号を継続して出力する。
又、制御装置（23）は水冷冷凍機（２）へ運転信号を出
力し、水冷冷凍機（２）は運転を開始する。The operation of the refrigerator will be described below. For example, in order to prevent the cooling water from freezing when the water-cooled refrigerator (2) is stopped in the winter or in the intermediate period between the winter and the summer, the cooling water in the water tank (5) of the cooling tower (1) and each pipe. (8),
(10) The cooling water such as the cooling water bypass pipe (21) is discharged to the outside. Here, when starting the refrigerator,
First, cooling water is supplied from the automatic water supply device (6) to the water tank (5). When cooling water accumulates in the water tank (5), the control device (2
3) outputs an operation signal to the cooling water pump (15) and an open signal to the on-off valve (22). Then, the cooling water accumulated in the cooling water going pipe (8) and the water tank (5) upstream of the cooling water pump (15) is sucked into the cooling water pump (15) and discharged. Further, the cooling water accumulated in the cooling water bypass pipe (21) is sucked into the cooling water pump (15).
Here, when the temperature of the cooling water discharged from the cooling water pump (15) is low and is equal to or lower than a predetermined temperature (for example, 25 ° C.), the control device that inputs temperature data from the cooling water temperature detector (18) ( 23) continuously outputs an open signal to the on-off valve (22).
Further, the control device (23) outputs an operation signal to the water cooling refrigerator (2), and the water cooling refrigerator (2) starts operation.
その後、冷却水バイパス管（21）に溜っていた冷却水が
全て冷却水ポンプ（15）に吸い込まれると、冷却水ポン
プ（15）は冷却水バイパス管（21）に残っていた空気を
吸い込み、内部にエア溜りができ、エアかみが発生す
る。冷却水ポンプ（15）にエアかみが発生すると、冷却
水ポンプ（15）の吐出圧は大幅に低下してほとんど零に
なる。このとき、逆止弁（16）が設けられているため、
冷却水バイパス管（21）に残っていた空気は水槽（５）
へは流れず、少しづつ冷却水ポンプ（15）へ引かれる。
冷却水ポンプ（15）に引かれた空気は僅かづつ、吐出さ
れ、冷却水ポンプ（15）の下流の冷却水往き配管
（８）、熱交換器（７）、及び冷却水戻り配管（10）を
経て冷却塔温水入口（14）から外部へ排出される。その
後、冷却水ポンプ（15）に吸い込まれた空気が経て吐出
されてエアかみが解消すると、冷却水ポンプ（15）の吐
出圧は大幅に上昇し、冷却水ポンプ（15）から吐出され
た冷却水は破線に示したように冷却水往き配管（８）、
熱交換器（７）、冷却水戻り配管（10）、及び冷却水バ
イパス管（21）を循環する。After that, when all the cooling water accumulated in the cooling water bypass pipe (21) is sucked into the cooling water pump (15), the cooling water pump (15) sucks in the air remaining in the cooling water bypass pipe (21), Air is trapped inside, causing air entrainment. When air entrainment occurs in the cooling water pump (15), the discharge pressure of the cooling water pump (15) drops significantly and becomes almost zero. At this time, since the check valve (16) is provided,
The air remaining in the cooling water bypass pipe (21) is stored in the water tank (5).
It does not flow to, but is gradually drawn into the cooling water pump (15).
The air drawn by the cooling water pump (15) is discharged little by little, and the cooling water going pipe (8), the heat exchanger (7), and the cooling water return pipe (10) downstream of the cooling water pump (15) are discharged. Through the cooling tower hot water inlet (14). After that, when the air sucked into the cooling water pump (15) is discharged and then the air entrainment disappears, the discharge pressure of the cooling water pump (15) increases significantly, and the cooling water discharged from the cooling water pump (15) is cooled. As shown by the broken line, the water is the cooling water outflow pipe (8),
It circulates through the heat exchanger (7), the cooling water return pipe (10), and the cooling water bypass pipe (21).
水冷冷凍機（２）の運転によって冷却水の温度が上昇し
て冷却水温度検出器（18）からの温度データが所定温度
より高くなると、制御装置（23）は開閉弁（22）へ閉信
号を出力する。閉信号を入力した開閉弁（22）は閉じ、
冷却水ポンプ（15）から吐出された冷却水は冷却水往き
配管（８）、熱交換器（７）、及び冷却水戻り配管（1
0）を経て冷却塔温水入口（14）から冷却装置（４）に
散布される。又、制御装置（23）は冷却塔送風機（３）
へ運転信号を出力し、冷却塔送風機（３）の運転によっ
て空気吸込口（4A）から外気が吸い込まれ、冷却水の温
度が低下する。温度が低下した冷却水は水槽（５）に溜
り、冷却水ポンプ（15）の運転によって水冷冷凍機
（２）へ送られる。When the temperature of the cooling water rises due to the operation of the water cooling refrigerator (2) and the temperature data from the cooling water temperature detector (18) becomes higher than a predetermined temperature, the control device (23) sends a closing signal to the opening / closing valve (22). Is output. The on-off valve (22) that receives the closing signal is closed,
The cooling water discharged from the cooling water pump (15) is cooled water going pipe (8), heat exchanger (7), and cooling water return pipe (1).
It is sprayed from the cooling tower hot water inlet (14) to the cooling device (4) via (0). Further, the control device (23) is a cooling tower blower (3)
An operating signal is output to the cooling tower blower (3) and the outside air is sucked in through the air suction port (4A) to lower the temperature of the cooling water. The cooling water having the lowered temperature is stored in the water tank (5) and is sent to the water cooling refrigerator (2) by the operation of the cooling water pump (15).
その後、時間が経過し、水冷冷凍機（２）の運転が停止
するときには、制御装置（23）は冷却塔送風機（３）及
び冷却水ポンプ（15）へ停止信号を出力すると共に、冷
却水温度が低下し開閉弁（22）へ開信号を出力する。そ
して、冷却塔送風機（３）及び冷却水ポンプ（15）は運
転を停止し、開閉弁（22）は開く。After that, when time passes and the operation of the water cooling refrigerator (2) is stopped, the control device (23) outputs a stop signal to the cooling tower blower (3) and the cooling water pump (15), and at the same time, the cooling water temperature is increased. Decreases and outputs an open signal to the on-off valve (22). Then, the cooling tower blower (3) and the cooling water pump (15) stop their operations, and the opening / closing valve (22) opens.
その後、外気温が低下して冷却水往き配管（８）の冷却
水温度が低下して例えば２℃になると、冷却水温度検出
器（18）から温度データを入力した制御装置（23）は冷
却水ポンプ（15）へ運転信号を出力する。すると、上記
起動時と同様に、冷却水バイパス管（21）の冷却水が冷
却水ポンプ（15）に総て引かれた後、冷却水ポンプ（1
5）にエアかみが発生する。このとき、空気が水槽
（５）へ流れることが逆止弁（16）によって阻止され、
冷却塔温水入口（14）からの空気の吸い込みはなく、冷
却水ポンプ（15）から空気が総て吐出された以後は、図
面に破線矢印で示したように冷却水が循環して凍結防止
運転が行われる。After that, when the outside air temperature decreases and the cooling water temperature of the cooling water outgoing pipe (8) decreases to, for example, 2 ° C., the control device (23) that inputs the temperature data from the cooling water temperature detector (18) cools down. Output an operation signal to the water pump (15). Then, as in the case of the above-mentioned startup, after the cooling water in the cooling water bypass pipe (21) is completely drawn by the cooling water pump (15), the cooling water pump (1
5) Air bite occurs. At this time, the check valve (16) prevents air from flowing into the water tank (5),
There is no intake of air from the cooling tower hot water inlet (14), and after all the air has been discharged from the cooling water pump (15), the cooling water circulates as shown by the broken line arrow in the drawing to prevent freeze operation. Is done.
上記実施例によれば、冬期又は中間期の起動時、又は凍
結防止運転の開始時などの冷却水の水槽（５）への水張
り直後や、冷却塔（１）の停止時に逆止弁（16）の冷却
水洩れを生じている場合に、冷却水バイパス管（21）に
存在した空気を冷却水ポンプ（15）が吸い込み、エアか
みが発生したときに、空気が冷却水往き配管（８）を経
て水槽（５）へ流れることを逆止弁（16）によって防止
できる。このため、空気が冷却塔温水入口（14）から冷
却水戻り配管（10）を経て冷却水バイパス管（21）に流
入することを回避し、冷却水ポンプ（15）から空気が総
て吐出された以後は冷却水ポンプ（15）がエアを吸い込
むことなく運転し、冷却水を安定して循環させることが
できる。According to the above-described embodiment, the check valve (16) is provided immediately after the cooling water tank (5) is filled with water or when the cooling tower (1) is stopped, such as at the time of start-up in the winter season or the middle season, or at the start of the freeze prevention operation. ), The cooling water pump (15) sucks in the air present in the cooling water bypass pipe (21), and when air entrainment occurs, the air goes to the cooling water going pipe (8). The check valve (16) can prevent the fluid from flowing through the water tank to the water tank (5). Therefore, the air is prevented from flowing into the cooling water bypass pipe (21) from the cooling tower warm water inlet (14) through the cooling water return pipe (10), and all the air is discharged from the cooling water pump (15). After that, the cooling water pump (15) operates without sucking air, and the cooling water can be circulated stably.
又、冷却水ポンプ（15）を横倒しにして水槽（５）下方
の機械室（5A）に設けることができ、機械室（5A）の高
さを低く抑え、冷却塔（１）のコンパクト化を図ること
ができる。さらに、冷却水ポンプ（15）のエアかみを防
止するために、冷却水バイパス管を図面に破線（21A）
で示したように冷却塔（１）に接続する必要がないの
で、冷却塔に専用のバイパス管接続口を設ける必要がな
く、冷却塔に標準品を使用することができ、冷却塔のコ
ストを抑えることができる。Further, the cooling water pump (15) can be laid sideways and installed in the machine room (5A) below the water tank (5), the height of the machine room (5A) can be kept low, and the cooling tower (1) can be made compact. Can be planned. In addition, in order to prevent air entrapment of the cooling water pump (15), the cooling water bypass pipe is shown in the drawing by the broken line (21A)
Since it is not necessary to connect to the cooling tower (1) as shown in, it is not necessary to provide a dedicated bypass pipe connection port for the cooling tower, and standard products can be used for the cooling tower, which reduces the cost of the cooling tower. Can be suppressed.
尚、本発明は上記実施例に限定されるものではなく、冷
却塔と例えばターボ式冷凍機とを冷却水往き配管及び冷
却水戻り配管で接続した冷凍機においても、上記実施例
と同様に冷却水バイパス管と冷却水往き配管との接続部
より上流の冷却水往き配管に逆止弁を設けることによっ
て、上記実施例と同様の作用効果を得ることができる。Incidentally, the present invention is not limited to the above-mentioned embodiment, and also in a refrigerator in which a cooling tower and, for example, a turbo refrigerator are connected by a cooling water going pipe and a cooling water return pipe, cooling is carried out in the same manner as in the above embodiment. By providing a check valve in the cooling water going-out pipe upstream of the connecting portion between the water bypass pipe and the cooling water going-out pipe, it is possible to obtain the same effect as that of the above embodiment.
（ト）発明の効果 本発明は以上のように構成された吸収冷凍機であり、バ
イパス管と冷却水往き配管との接続点より上流の冷却水
往き配管に冷却塔から冷却水ポンプへ流れを許容する逆
止弁を設けたので、冷凍機の起動時、或いは凍結防止運
転の開始時、空気がバイパス管を経て冷却塔へ流れるこ
とがなく、バイパス管に残っていた空気によって冷却水
ポンプにエアかみと空気の排出との繰り返しが発生する
ことを防止でき、冷却水ポンプにより冷却水を安定して
循環させることができ、冷凍機の運転を安定させること
ができる。(G) Effect of the Invention The present invention is an absorption chiller configured as described above, in which the flow from the cooling tower to the cooling water pump is passed to the cooling water outgoing pipe upstream from the connection point between the bypass pipe and the cooling water outgoing pipe. Since a non-return valve that allows it is provided, air does not flow to the cooling tower through the bypass pipe when the refrigerator starts or when the freeze prevention operation starts, and the cooling water pump is used by the air remaining in the bypass pipe. It is possible to prevent repetition of air biting and air discharge, to stably circulate the cooling water by the cooling water pump, and to stabilize the operation of the refrigerator.
又、冷却水ポンプを横倒しに設けることによって、冷凍
機の起動時などに冷却水ポンプをエアかみが発生した場
合にも、空気がバイパス管及び冷却水往き配管を経て水
槽へ流れることを、逆止弁にて防止でき、冷却水ポンプ
から空気が吐出された後は冷却水ポンプの運転を安定さ
せることができ、この結果、冷却水ポンプを冷却塔の下
部に横倒しに設置して、冷却塔の高さを抑えることがで
き、冷却塔のコンパクト化を図ることができる。In addition, by installing the cooling water pump sideways, it is possible to prevent air from flowing to the water tank through the bypass pipe and the cooling water going pipe even if air is generated in the cooling water pump when the refrigerator is started. It can be prevented by a stop valve, and the operation of the cooling water pump can be stabilized after air is discharged from the cooling water pump.As a result, the cooling water pump is installed sideways at the bottom of the cooling tower and the cooling tower is installed. The height of the cooling tower can be suppressed, and the cooling tower can be made compact.
図面は本発明の一実施例を示す冷凍機の回路構成図であ
る。 （１）……冷却塔、（２）……水冷冷凍機、（５）……
水槽、（８）……冷却水往き配管、（8A）……接続点、
（10）……冷却水戻り配管、（15）……冷却水ポンプ、
（16）……逆止弁、（21）……冷却水バイパス管。The drawing is a circuit configuration diagram of a refrigerator showing an embodiment of the present invention. (1) …… Cooling tower, (2) …… Water-cooled refrigerator, (5) ……
Water tank, (8) …… Cooling water going pipe, (8A) …… Connection point,
(10) …… Cooling water return pipe, (15) …… Cooling water pump,
(16) …… Check valve, (21) …… Cooling water bypass pipe.
Claims (2)
えた冷却水往き配管と冷却水戻り配管とで接続し、冷却
水ポンプの吸込側の冷却水往き配管と冷却水戻り配管と
をバイパス管で接続した冷凍機において、このバイパス
管と冷却水往き配管との接続点より上流の冷却水往き配
管に冷却塔から冷却水ポンプへの流れを許容する逆止弁
を設けたことを特徴とする冷凍機。1. A cooling tower and a water-cooled refrigerator are connected by a cooling water going pipe equipped with a cooling water pump and a cooling water returning pipe, and a cooling water going pipe and a cooling water returning pipe on the suction side of the cooling water pump are connected. In a refrigerator with a bypass pipe connected to the cooling pipe, a check valve that allows the flow from the cooling tower to the cooling water pump is provided in the cooling water outgoing pipe upstream of the connection point between the bypass pipe and the cooling water outgoing pipe. Characteristic refrigerator.
往き配管で接続し、水冷冷凍機と冷却塔とを冷却水戻り
配管で接続し、冷却水往き配管に冷却水ポンプを設けた
冷凍機において、上記冷却水ポンプを横倒しに設け、冷
却水ポンプの吸込側の冷却水往き配管と上記水槽の水面
より上方の冷却水戻り配管とをバイパス管で接続し、か
つ、このバイパス管と冷却水往き配管との接続点より上
流の冷却水往き配管に接続点から冷却塔への流れを止め
る逆止弁を設けたことを特徴とする冷凍機。2. A water tank at the bottom of the cooling tower and a water cooling refrigerator are connected by a cooling water going pipe, a water cooling refrigerator and a cooling tower are connected by a cooling water returning pipe, and a cooling water pump is provided in the cooling water going pipe. In the refrigerating machine, the cooling water pump is provided sideways, and the cooling water going pipe on the suction side of the cooling water pump and the cooling water return pipe above the water surface of the water tank are connected by a bypass pipe, and the bypass pipe A refrigerator provided with a check valve for stopping the flow from the connection point to the cooling tower in the cooling water going pipe upstream of the connection point between the cooling water going pipe and the cooling water going pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15625890A JPH0794944B2 (en) | 1990-06-14 | 1990-06-14 | refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15625890A JPH0794944B2 (en) | 1990-06-14 | 1990-06-14 | refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0448177A JPH0448177A (en) | 1992-02-18 |
| JPH0794944B2 true JPH0794944B2 (en) | 1995-10-11 |
Family
ID=15623868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15625890A Expired - Fee Related JPH0794944B2 (en) | 1990-06-14 | 1990-06-14 | refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794944B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3639659B2 (en) | 1995-12-27 | 2005-04-20 | 米雄 菅野 | Locking device for orthodontic treatment |
| CN105202845A (en) * | 2015-10-28 | 2015-12-30 | 太仓东能环保设备有限公司 | Circulating water cooling device for resin production technology |
| CN114623636B (en) * | 2022-05-17 | 2023-02-03 | 中国空气动力研究与发展中心高速空气动力研究所 | Circulating water system for classified regulation of cooling water temperature |
-
1990
- 1990-06-14 JP JP15625890A patent/JPH0794944B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0448177A (en) | 1992-02-18 |
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