JPH0448177A - Refrigerating machine - Google Patents
Refrigerating machineInfo
- Publication number
- JPH0448177A JPH0448177A JP15625890A JP15625890A JPH0448177A JP H0448177 A JPH0448177 A JP H0448177A JP 15625890 A JP15625890 A JP 15625890A JP 15625890 A JP15625890 A JP 15625890A JP H0448177 A JPH0448177 A JP H0448177A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- cooling
- water pump
- pipe
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000498 cooling water Substances 0.000 claims abstract description 213
- 238000001816 cooling Methods 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application 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 through 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 refrigerating machine and a cooling tower are connected by a cooling water return pipe and a cooling water return pipe, and the cooling water return pipe and the cooling water return pipe are connected. A cooling water circulation circuit is disclosed in which a bypass pipe is connected to the upstream side of a cooling water pump provided in a cooling water pump, and a three-way valve is provided at a connection point between the bypass pipe and a cooling water supply pipe.
（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、例えは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は道が形成きれる。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か僅かになったとき、
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 conventional technology, for example, when starting up a compression refrigerator, the three-way valve is opened to the cooling tower, bypass pipe, and cooling water pump side, and the cooling water pump is operated. The cooling water pump sucks in the air that was left in the bypass pipe. Here, if the cooling water pump is, for example, a line pump installed horizontally, air will accumulate in the pump. After that, air escapes from the cooling water pump and the discharge pressure of the cooling water pump increases, but at this time, air flows from the opening on the cooling tower side of the cooling water return pipe, through the cooling water return pipe, the bypass pipe, and the cooling water outgoing pipe. A path will be formed to vent air to the cooling tower. For this reason,
The discharge pressure of the cooling water pump increases, and the air remaining in the bypass pipe is sucked into the cooling water pump, causing air trapping. When the discharge pressure of the cooling water pump becomes low,
Air flows through the cooling water piping to the cooling tower and refrigerator,
At the same time, air is drawn from the opening on the cooling tower side of the cooling water return pipe. The air drawn through the opening remains in the bypass pipe, and when the air trap is resolved by discharging the air from the cooling water pump, the air in the bypass pipe is drawn by the cooling water pump and air trap occurs again. Thereafter, the cooling water pump repeatedly absorbs air and discharges air, and the operation of the refrigerator becomes unstable, and there is a risk that the cooling water pump may malfunction.
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。In addition, if the cooling water pump is installed vertically at the bottom of the cooling tower, for example, in order to prevent the frequent air trapping described above, the installation space for the cooling water pump at the bottom of the cooling tower becomes large, and the cooling A problem arises in 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 intake in a cooling water pump and to make a cooling tower more 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（２
１）で接続した冷凍機において、冷却水バイパス管（２
１）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り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 cooling water supply piping (8) that connects a cooling tower (1) and a water-cooled refrigerator (2) with a cooling water pump (15). ) and the cooling water return pipe (10), and the cooling water outgoing pipe (8) on the suction side of the cooling water pump (15).
) and the cooling water return pipe (10) are connected to the cooling water bypass pipe (2
In the refrigerator connected in 1), the cooling water bypass pipe (2)
A check valve that allows flow from the cooling tower (1) to the cooling water pump (15) is provided in the cooling water piping 8) upstream of the connection point (8A) between the cooling water piping 1) and the cooling water piping <8). 16).
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) at the bottom of the cooling tower (1) and the water-cooled refrigerator (2)
and the water-cooled refrigerator (2).
and the cooling tower (1) are connected by a cooling water return pipe (10),
In a refrigerator in which a cooling water pump (15) is installed in the cooling water supply pipe (8), the cooling water pump (15) is installed horizontally below the water tank (5) to cool the suction side of the cooling water pump (15). The water supply pipe (8) and the cooling water return pipe (10) above the water surface of the water tank (5) are connected by a cooling water bypass pipe (21), and the cooling water bypass pipe (21) and the cooling water return pipe (10) are connected to each other. A refrigerator is equipped with a check valve (16) that stops the flow from the connection point (8A) to the cooling tower (1) in the cooling water supply pipe (8) upstream of the connection point (8A) with the pipe (8). This is what we provide.
（ネ）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（２
１）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）を逆性して冷却塔（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。(f) Function When the chiller starts up, the cooling water pump (15) starts operating, and the cooling water pump (15) starts operating the cooling water bypass pipe (2).
The air remaining in 1) is sucked in, causing air trapping.
When the discharge pressure of the cooling water pump (15) suddenly decreases,
The check valve (16) prevents the air that has flowed through the cooling water bypass pipe (21) from reversing the cooling water outgoing pipe (8) and flowing into the cooling tower (1). 21
) to prevent air from being sucked into the cooling water pump (
15), it is possible to avoid the repetition of air trapping and air discharge, and to stabilize the circulation of 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
安定き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）の高きを抑え、冷却塔
（１）のコンパクト化を図ることが可能になる。In addition, if an air pocket occurs in the cooling water pump (15) installed on its side when starting the refrigerator, etc., and air is trapped, the cooling water supply pipe (8) is removed from the cooling water bypass pipe (21). ) is prevented from flowing to the water tank (5) by the check valve (16), and the cooling water bypass pipe <
21), prevent air from being sucked in again into the cooling water pump (15), avoid the repetition of air accumulation and air discharge in the cooling water pump (15), and stabilize the operation of the cooling water pump (15). It becomes possible. Also, cooling water pump (15
) is installed horizontally, the height of the cooling tower (1) can be suppressed, and the cooling tower (1) can be made more compact.
（へ）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) Example Hereinafter, an example of the present invention will be described in detail based on the drawings.
図面において、（１）は冷却塔、（２）は例えは吸収冷
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、り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（５
Ａ）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、この逆止弁け６）
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（１１）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 suction port, (5> is a water tank, and this water tank (5) is equipped with an automatic water supply device (6) equipped with a float valve (6A). , aquarium (5
) A machine room (5A) is provided below the machine room (5A).
5A) is provided with a cooling water pump, etc., which will be described later. (
7) is a heat exchanger installed in, for example, a condenser and an absorber of a water-cooled refrigerator, and this heat exchanger (7) and cooling tower (1) are composed of a cooling water outgoing pipe (8) and a cooling water return pipe. (10). Here, (11) is the cooling tower cold water outlet, (
12) is the refrigerator inlet, 13) is the refrigerator outlet, (14)
is the cooling tower hot water inlet. (15) is the cooling water pipe (
8) is a cooling water pump (for example, a line pump) installed in the middle of the machine room (5).
A) is installed horizontally, and when the cooling water pump (15) sucks air, an air pocket is generated inside. or,
(16) is a check valve installed in the cooling water supply pipe (8) upstream of the cooling water pump (15), and this check valve 6)
is the cooling tower cold water outlet (11) as shown by the solid arrow in the drawing.
) to the cooling water pump (15), and do not allow cold water or air to flow from the cooling water pump (15) toward the cooling tower cold water outlet (11). (17) is a flow rate control valve, (
Reference numeral 18) denotes cooling water temperature detectors, each of which is provided in the cooling water supply 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
接続きれ、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（２
１）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) can be connected to the middle of the cooling water return pipe (10), and the other end is connected to the check valve (16) and the cooling water pump (15).
) is connected to the middle of the cooling water supply 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 a cooling water bypass pipe (2
It is located in the middle of 1).
（２３）は冷凍機の制御装置であり、この制御装置（２
３）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ａｍ（
２）の運転を制御する。(23) is a control device for the refrigerator, and this control device (23) is a control device for the refrigerator.
3) inputs temperature data from the cooling water temperature detector (18), outputs an opening/closing signal to the opening/closing valve (22), and sends an operation signal or stop signal to the cooling tower blower (3) and cooling water pump (15). Also, the control device (23) is a water-cooled refrigeration am (
2) Control the operation.
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（
２３）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り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°Ｃ）
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１ｌ（２）
は運転を開始する。The operation of the refrigerator will be explained below. For example, a water-cooled refrigerator (2) during winter or an intermediate period between winter and summer.
When the cooling tower (
Water tank in 1) < cooling water in 5), and each piping (8), (
10), cooling water such as a 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 (
23) outputs an operating signal to the cooling water pump (15) and outputs an open signal to the on-off valve (22). Then, the cooling water accumulated in the cooling water outgoing pipe 8) and the water tank (5) upstream of the cooling water pump (15) flows into the cooling water pump (15).
) is sucked in and expelled. In addition, the cooling water bypass pipe (
21) is sucked into the cooling water pump (15). Here, the temperature of the cooling water discharged from the cooling water pump (15) is low and at a predetermined temperature (for example, 25°C).
In the following cases, the control device (23) inputting temperature data from the cooling water temperature detector (18) continuously outputs an open signal to the on-off valve (22). In addition, the control device (23) outputs an operation signal to the water-cooled refrigerator (2), and the water-cooled refrigerator 1L (2)
starts driving.
その後、冷却水バイパス管（２１）に溜っていた冷却水
が総て冷却水ポンプ（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＜１
５）へ引かれる。冷却水ポンプ（１５）に引かれた空気
は僅かづつ、吐出きれ、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
へ排出きれる。その後、冷却水ポンプ（１５）に吸い込
まれた空気が総て吐出き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）から吐出き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 that had accumulated in the cooling water bypass pipe (21) is sucked into the cooling water pump (15), the cooling water pump (15) sucks the air that remained in the cooling water bypass pipe (21). , air will accumulate inside, causing air trapping. When air is trapped in the cooling water pump (15), the discharge pressure of the cooling water pump (15) decreases significantly to almost zero. At this time, since the check valve (16) is provided, the air remaining in the cooling water bypass pipe (21) does not flow to the water tank (5), and little by little the air remaining in the cooling water pump < 1
5). The air drawn by the cooling water pump (15) is discharged little by little, and the cooling water outgoing pipe (8) downstream of the cooling water pump (15), the heat exchanger <7>, and the cooling water return pipe (10) are exhausted. The water is then discharged to the outside from the cooling tower hot water inlet (14). After that, when all the air sucked into the cooling water pump (15) is discharged and the air trap is resolved, the discharge pressure of the cooling water pump (15) increases significantly, and the air is completely discharged from the cooling water pump (15). The cooling water circulates through the cooling water outgoing pipe (8), the heat exchanger (7), the cooling water return pipe (10), and the cooling water bypass pipe (21) as shown by the broken line.
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）から吐出きれた冷却水は
冷却水往き配管（８）、熱交換器（７）、及び冷却水戻
り配管（１０）を経て冷却塔温水人口（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 operation of the water-cooled refrigerator (2) and the temperature data from the cooling water temperature detector (18) becomes higher than a predetermined temperature, the control device (23) controls the on-off valve (22).
Outputs a close signal to. Opening/closing valve to which the close signal was input (22)
is closed, and the cooling water completely discharged from the cooling water pump (15) passes through the cooling water outgoing pipe (8), the heat exchanger (7), and the cooling water return pipe (10), and is then cooled from the cooling tower hot water pump (14). Sprayed on the device (4). In addition, the control device (23) outputs an operation signal to the cooling tower blower (3), and outputs an operation signal to the cooling tower blower (3).
), outside air is sucked in from the air suction port (4A), and the temperature of the cooling water decreases. Cooling water whose temperature has decreased is collected in a water tank (5) and is sent to a water-cooled refrigerator (2) by operation of a 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（１
５）は運転を停止し、開閉弁（２２）は開く。After that, when time passes and the water-cooled refrigerator (2) stops operating, the control device (23) controls the cooling tower blower (3).
And a stop signal is output to the cooling water pump (15), and at the same time, the cooling water temperature decreases and an open signal is output to the on-off valve (22). Then, cooling tower blower (3) and cooling water pump (1)
5) stops operation, and the on-off 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℃例えば２°Ｃ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（１５）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、冷却塔温水人口（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き
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 temperature drops and the cooling water temperature in the cooling water supply pipe (8) decreases to, for example, 2°C, the control device (23
) outputs an operation signal to the cooling water pump <15). Then, similarly to the above startup, after all of the cooling water in the cooling water bypass pipe (21) is drawn to the cooling water pump (15), air is trapped in the cooling water pump (15). At this time, the check valve (16) prevents air from flowing into the water tank (5), and no air is sucked in from the cooling tower hot water pump (14), and all air is discharged from the cooling water pump (15). After the freezing occurs, the cooling water is circulated as shown by the broken line arrow in the drawing, and anti-freezing operation is performed.
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との冷却水の水槽（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（１
４）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（１
５）から空気が総て吐出きれた以後は冷却水ポンプ（１
５）がエアを吸い込むことなく運転し、冷却水を安定し
て循環きせることができる。According to the above embodiment, the check valve ( 16), the cooling water bypass pipe (21) is leaking.
) The cooling water pump (15) sucks in the air that was present in the
When air stagnation occurs, air flows into the cooling water supply pipe (8
) can be prevented from flowing into the water tank (5) by the check valve (16). For this reason, air flows into the cooling tower hot water inlet (1
4) through the cooling water return pipe (10) and into the cooling water bypass pipe (21).
5) After all the air has been discharged from the cooling water pump (1)
5) can operate without sucking air and can circulate cooling water 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
〉の高芒を低く抑え、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ｔ１面に破線
（２１Ａ）で示したように冷却塔り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。In addition, the cooling water pump (15) can be placed sideways and installed in the machine room (5A) below the water tank (5).
) can be kept low and the cooling tower (1) can be made more compact. Furthermore, in order to prevent air from being trapped in the cooling water pump (15), there is no need to connect it to the cooling tower (1) as shown by the broken line (21A) on the cooling water bypass pipe (t1). There is no need to provide a bypass pipe connection port, and standard products can be used for the cooling tower, reducing the cost of the cooling tower.
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。It should be noted that the present invention is not limited to the above-mentioned embodiments, and can also be applied to a refrigerator in which a cooling tower and, for example, a turbo refrigerator are connected through a cooling water outflow pipe and a cooling water return pipe, in the same manner as in the above embodiment. By providing a check valve in the cooling water supply pipe upstream of the connection between the water bypass pipe and the cooling water supply pipe, the same effects as in the above embodiment can be obtained.
（ト）発明の効果
本発明は以上のように構成き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の流れを許容する
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
て循環きせることができ、冷凍機の運転を安定させるこ
とができる。(G) Effects 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 connected to the cooling water supply pipe upstream from the connection point between the bypass pipe and the cooling water supply pipe. Since we have installed a check valve that allows this, when the chiller starts up or anti-freeze operation begins, air will not flow through the bypass pipe to the cooling tower, and the air remaining in the bypass pipe will stop the cooling water pump. It is possible to prevent the repeated occurrence of air trapping and air discharge, and the cooling water can be stably circulated by the cooling water pump, making it possible 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に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き
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、冷却塔の高きを抑えることがで
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 on its side, even if air is trapped in the cooling water pump when starting up the refrigerator, the air can be prevented from flowing to the water tank via the bypass pipe and the cooling water supply pipe. This can be prevented with 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 can be installed horizontally at the bottom of the cooling tower, and the cooling tower The height of the cooling tower can be suppressed, and the cooling tower can be made more 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＞ ００．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 piping, (
8A)...Connection point, (10)...Cooling water return pipe,
(15>... Cooling water pump, (16> 00. Check valve, (21)... Cooling water bypass pipe.
Claims (1)
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。 ２、冷却塔下部の水槽と水冷冷凍機とを冷却水往き配管
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。[Claims] 1. The cooling tower and the water-cooled refrigerator are connected by a cooling water sending pipe and a cooling water return pipe equipped with a cooling water pump, and the cooling water sending pipe and the cooling water on the suction side of the cooling water pump are connected. In a refrigerator that is connected to a return pipe by a bypass pipe, a check valve is installed in the cooling water pipe upstream from the connection point between the bypass pipe and the cooling water pipe to allow flow from the cooling tower to the cooling water pump. A refrigerator characterized by: 2. A refrigerator in which the water tank at the bottom of the cooling tower and the water-cooled refrigerator are connected by a cooling water supply pipe, the water-cooled refrigerator and the cooling tower are connected by a cooling water return pipe, and a cooling water pump is installed in the cooling water supply pipe. , the cooling water pump is installed horizontally, the cooling water outgoing 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 cooling water A refrigerator characterized in that a check valve for stopping the flow of cooling water from a connection point to a cooling tower is provided in a cooling water outgoing pipe upstream of a connection point with an outgoing 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 true JPH0448177A (en) | 1992-02-18 |
| JPH0794944B2 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6183250B1 (en) | 1995-12-27 | 2001-02-06 | Shofu, Inc. | Lock 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 |
| CN114623636A (en) * | 2022-05-17 | 2022-06-14 | 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
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6183250B1 (en) | 1995-12-27 | 2001-02-06 | Shofu, Inc. | Lock 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 |
| CN114623636A (en) * | 2022-05-17 | 2022-06-14 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0794944B2 (en) | 1995-10-11 |
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