JPH04117204U - Hydraulic oil cooling system - Google Patents
Hydraulic oil cooling systemInfo
- Publication number
- JPH04117204U JPH04117204U JP2822291U JP2822291U JPH04117204U JP H04117204 U JPH04117204 U JP H04117204U JP 2822291 U JP2822291 U JP 2822291U JP 2822291 U JP2822291 U JP 2822291U JP H04117204 U JPH04117204 U JP H04117204U
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- flow rate
- hydraulic oil
- detector
- detected
- 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
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 239000000498 cooling water Substances 0.000 claims abstract description 54
- 239000012530 fluid Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 235000020679 tap water Nutrition 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 冷却水のイオン濃度が酸性を示したり、パイ
プ内流速が増加した場合に、熱交換器のパイプが腐食、
侵食されるのを防止する。
【構成】 油圧作動油と冷却水との熱交換器を有する油
圧作動油冷却装置において、油圧作動油の冷却水配管に
閉止弁１７と流量調節弁２０を設け、かつ冷却水のＰＨ
を検出するＰＨ検出器１５と冷却水の流量を検出する流
量検出器１８を設け、前記ＰＨをＰＨ検出器１５で検出
し、この検出値が予め与えられた値の範囲外となったと
き前記閉止弁１７で冷却水を停止し、また前記流量を流
量検出器１８で検出し、この検出値が予め与えられた値
以上にならないように前記流量調節弁２０で冷却水を調
節するようにしたものである。
(57) [Summary] [Purpose] If the ion concentration of the cooling water becomes acidic or the flow velocity in the pipe increases, the heat exchanger pipes may corrode or
prevent erosion. [Structure] In a hydraulic oil cooling system having a heat exchanger between hydraulic oil and cooling water, a shutoff valve 17 and a flow rate control valve 20 are provided in the hydraulic oil cooling water piping, and the PH of the cooling water is
A PH detector 15 for detecting the flow rate of the cooling water and a flow rate detector 18 for detecting the flow rate of the cooling water are provided. The cooling water is stopped by the shutoff valve 17, the flow rate is detected by the flow rate detector 18, and the cooling water is adjusted by the flow rate adjustment valve 20 so that the detected value does not exceed a predetermined value. It is something.
Description
【０００１】0001
本考案は、特に冷却水の水質及び水量制御を行なう油圧作動油冷却装置に関す るものである。 The present invention is particularly related to a hydraulic oil cooling system that controls the quality and quantity of cooling water. It is something that
【０００２】0002
従来射出成形機等に使用される油圧作動油冷却装置は作動油の温度が制御され ており、その１例（実開昭６０−１３４９０７号公報）を図４について説明する と、１は油圧作動油を蓄える油圧タンク、２はこの油圧タンクに蓄えられる油圧 作動油、３はこの油圧作動油２を通す油圧配管、４は油圧タンク１から熱交換器 ５を通って油圧タンク１まで油圧作動油を循環させる油圧ポンプ、５は前記油圧 作動油を冷却し、銅パイプで形成されている熱交換器、６はこの熱交換器５で前 記油圧作動油を冷却する際に媒体として用いられる水道水、７はこの水道水を通 す冷却配管、８は油圧タンク１の壁面に固着され前記油圧作動油２の温度を検知 するサーモスタット、１０は水道水６の温度を検知するサーモスタット、１１は このサーモスタット１０と前記サーモスタット８の各々の信号を受信して温度差 信号に変換し、この信号を流量調整弁１２に送る作動アンプである。流量調整弁 １２は作動アンプ１１からの信号を受けて前記水道水６の流量を可変させる流量 調整弁である。 Conventionally, hydraulic oil cooling systems used in injection molding machines etc. control the temperature of the hydraulic oil. An example of this (Japanese Utility Model Application Publication No. 134907/1983) will be explained with reference to FIG. 1 is a hydraulic tank that stores hydraulic fluid, and 2 is the hydraulic pressure stored in this hydraulic tank. Hydraulic oil, 3 is a hydraulic pipe that passes this hydraulic oil 2, 4 is a heat exchanger from the hydraulic tank 1 A hydraulic pump that circulates hydraulic oil through 5 to the hydraulic tank 1, 5 is the hydraulic A heat exchanger 6, which cools the hydraulic oil and is formed of copper pipes, is connected to the front of this heat exchanger 5. 7. Tap water used as a medium when cooling hydraulic fluid; A cooling pipe 8 is fixed to the wall of the hydraulic tank 1 and detects the temperature of the hydraulic fluid 2. 10 is a thermostat that detects the temperature of tap water 6; 11 is a thermostat that detects the temperature of tap water 6; The temperature difference is determined by receiving each signal of this thermostat 10 and the thermostat 8. This is an operating amplifier that converts the signal into a signal and sends this signal to the flow rate regulating valve 12. flow regulating valve 12 is a flow rate for varying the flow rate of the tap water 6 in response to a signal from the operating amplifier 11; It is a regulating valve.
【０００３】0003
前記従来の油圧作動油冷却装置では、冷却水として水道水を使用し、作動アン プ１１からの出力で流量調整されるようになっている。しかしながら、直接井戸 水を使用する場合があり、このような場合には熱交換器のパイプには伝熱特性の よい銅パイプが使用されるため、冷却水のイオン濃度（ＰＨ値）が酸性を示すと 腐食を生じてパイプ破損が生じる。また冷却水量を所定値より多く流すと、パイ プ内流速が増加して侵食され、パイプの破壊が生じる。パイプが破損した場合に は、冷却水は作動油に混合し作動油全部を取り替えることが必要になり、作業効 率が悪化する問題があった。 本考案は前記従来の課題を解決しようとするものである。 The conventional hydraulic oil cooling system uses tap water as cooling water and The flow rate is adjusted by the output from the pump 11. However, direct well Water may be used, and in such cases the heat exchanger pipes have heat transfer properties. Because good copper pipes are used, if the ion concentration (PH value) of the cooling water is acidic, Corrosion occurs and pipe breakage occurs. Also, if the amount of cooling water is greater than the specified value, The flow velocity in the pipe increases, leading to erosion and pipe failure. If the pipe is damaged In this case, it is necessary to mix the cooling water with the hydraulic oil and replace all the hydraulic oil, which reduces work efficiency. There was a problem that the rate was getting worse. The present invention attempts to solve the above-mentioned conventional problems.
【０００４】0004
このため本考案は、油圧作動油と冷却水との熱交換器を有する油圧作動油冷却 装置において、油圧作動油の冷却水配管に閉止弁を設けると共に、同冷却水のＰ Ｈを検出するＰＨ検出器を設け、同ＰＨをＰＨ検出器で検出し、この検出値が予 め与えられた値の範囲外となったとき前記閉止弁で冷却水を停止するようにして なるもので、これを課題解決のための手段とするものである。 For this reason, the present invention is a hydraulic fluid cooling system having a heat exchanger between hydraulic fluid and cooling water. In the equipment, a shutoff valve is installed in the hydraulic oil cooling water piping, and the cooling water P A PH detector is installed to detect H, the PH is detected by the PH detector, and this detected value is predicted. The cooling water is stopped by the shutoff valve when the value falls outside the given value range. This is a means to solve problems.
【０００５】 また本考案は、油圧作動油と冷却水との熱交換器を有する油圧作動油冷却装置 において、油圧作動油の冷却水配管に流量調節弁を設けると共に、同冷却水の流 量を検出する流量検出器を設け、同流量を流量検出器で検出し、この検出値が予 め与えられた値以上にならないように前記流量調節弁で冷却水を調節するように してなるもので、これを課題解決のための手段とするものである。[0005] In addition, the present invention provides a hydraulic fluid cooling device having a heat exchanger between hydraulic fluid and cooling water. In addition to installing a flow rate control valve in the hydraulic oil cooling water piping, A flow rate detector is installed to detect the flow rate, the same flow rate is detected by the flow rate detector, and this detected value is predicted. The flow rate control valve adjusts the cooling water so that it does not exceed a given value. It is a means to solve problems.
【０００６】 更に本考案は、油圧作動油と冷却水との熱交換器を有する油圧作動油冷却装置 において、油圧作動油の冷却水配管に閉止弁と流量調節弁を設け、かつ冷却水の ＰＨを検出するＰＨ検出器と冷却水の流量を検出する流量検出器を設け、前記Ｐ ＨをＰＨ検出器で検出し、この検出値が予め与えられた値の範囲外となったとき 前記閉止弁で冷却水を停止し、また前記流量を流量検出器で検出し、この検出値 が予め与えられた値以上にならないように前記流量調節弁で冷却水を調節するよ うにしてなるもので、これを課題解決のための手段とするものである。[0006] Furthermore, the present invention provides a hydraulic fluid cooling device having a heat exchanger between hydraulic fluid and cooling water. A shutoff valve and a flow rate control valve are installed in the hydraulic oil cooling water piping, and the cooling water A PH detector for detecting PH and a flow rate detector for detecting the flow rate of cooling water are provided, and the P When H is detected by a PH detector and this detected value is outside the pre-given value range. The cooling water is stopped by the shutoff valve, the flow rate is detected by the flow rate detector, and this detected value is The cooling water is adjusted by the flow control valve so that the flow rate does not exceed a predetermined value. This is how it works, and it is used as a means to solve problems.
【０００７】[0007]
本考案の油圧作動油冷却装置は、冷却水のＰＨ値を検出して、この値が所定値 範囲外となったとき閉止弁でもって冷却水を停止する。その為銅で形成されてい る熱交換部の腐食が阻止され、油圧作動油に冷却水が混入するのを防止する。ま た冷却水の水量を検出して、所定以上の流速で流れないように制御する。このた め熱交換部の侵食を防止し冷却水の油圧作動油への混入を防止する。 The hydraulic fluid cooling device of the present invention detects the pH value of the cooling water and sets this value to a predetermined value. When the water is out of range, shut off the cooling water using the shutoff valve. Therefore, it is made of copper. This prevents corrosion of the heat exchanger and prevents cooling water from entering the hydraulic fluid. Ma The amount of cooling water is detected and controlled so that the flow does not exceed a predetermined flow rate. others This prevents erosion of the heat exchanger and prevents cooling water from entering the hydraulic fluid.
【０００８】[0008]
以下本考案を図面の実施例について説明すると、図１〜図３は本考案の実施例 を示す。なお、本考案の説明において前記従来の図４と同一の部分は同一の符号 で示すことにし、ここではこれらの詳細な説明は省略する。 The present invention will be explained below with reference to the embodiments shown in the drawings. Figures 1 to 3 are examples of the present invention. shows. In addition, in the explanation of the present invention, the same parts as those in the conventional figure 4 are designated by the same reference numerals. , and detailed explanation thereof will be omitted here.
【０００９】 先ず図１の第１実施例について説明すると、冷却配管７の冷却水入口側にＰＨ 検出器１５を配設し、同検出器１５の検出値は制御装置１６に入力される。また 検出器１５の下流側には閉止弁１７が設置されている。制御装置１６では予めＰ Ｈの範囲、例えば、熱交換器５の許容腐食濃度である冷却水のＰＨ濃度が６．５ 〜８．０の範囲に設定されている。そしてＰＨ検出濃度が前記範囲外になったと き、制御装置１６では閉止弁１７を閉状態とする出力を出し、閉止弁１７を閉と する。その結果冷却水は停止されて腐食の増進を防止する。なお、この場合、同 時に警報を出すようにすれば運転者にとって管理がし易い。[0009] First, the first embodiment shown in FIG. 1 will be explained. A detector 15 is provided, and the detected value of the detector 15 is input to a control device 16. Also A shutoff valve 17 is installed downstream of the detector 15. In the control device 16, P H range, for example, the PH concentration of the cooling water, which is the allowable corrosion concentration of the heat exchanger 5, is 6.5. It is set in the range of ~8.0. If the detected pH concentration falls outside the above range, Then, the control device 16 outputs an output to close the shut-off valve 17, and closes the shut-off valve 17. do. As a result, the cooling water is stopped to prevent further corrosion. In this case, the same It will be easier for the driver to manage the vehicle if a warning is issued at certain times.
【００１０】 図２は本考案の第２実施例を示し、冷却配管７の冷却水入口側に流量検出器１ ８を配設し、同検出器１８の検出値は制御装置１９に入力される。また検出器１ ８の下流側には流量調節弁２０が設置されている。制御装置１９では予め制限流 量値が設定されていて、熱交換器５の侵食を防止する。即ち、許容流速以上で流 れないように、制御装置１９では流量を監視し、許容流速以上となったとき、流 量調節弁２０を介して流量を制限する。0010 FIG. 2 shows a second embodiment of the present invention, in which a flow rate detector 1 is installed on the cooling water inlet side of the cooling pipe 7. The detection value of the detector 18 is input to the control device 19. Also, detector 1 A flow control valve 20 is installed downstream of the flow control valve 8 . The control device 19 controls the restricted flow in advance. The quantity value is set to prevent erosion of the heat exchanger 5. In other words, the flow rate is higher than the allowable flow rate. The control device 19 monitors the flow rate so that the flow rate does not exceed the allowable flow rate. The flow rate is limited via the volume control valve 20.
【００１１】 次に図３は本考案の第３実施例を示し、前記冷却水のＰＨ及び流量を管理する ために各々の設備を配設したものである。即ち、図１及び図２を組合せてなるも のである。この様に構成することによって、冷却水の管理がより十分にできるた め、熱交換器の腐食及び侵食を防止することが出来る。なお、図３の実施例にお いて、閉止弁１７及び流量調節弁２０を省略して流量調節弁１２で兼用させるこ ともできる。なお、このときは制御装置１６、制御装置１９及び温度制御装置１ １（作動アンプによる装置）を統合して構成する。即ち、制御装置は冷却水の温 度制御機能、流量制限機能及びＰＨ管理機能を持たせ、流量調節弁１２で調節し て、機器構成の簡便化を図ると更に有益である。[0011] Next, FIG. 3 shows a third embodiment of the present invention, in which the pH and flow rate of the cooling water are managed. Each facility has been installed for this purpose. That is, a combination of FIGS. 1 and 2 It is. With this configuration, cooling water can be managed more fully. Therefore, corrosion and erosion of the heat exchanger can be prevented. In addition, in the example of FIG. Therefore, the shutoff valve 17 and the flow rate adjustment valve 20 can be omitted and the flow rate adjustment valve 12 can be used. Can also be done. In addition, at this time, the control device 16, the control device 19, and the temperature control device 1 1 (a device using an operating amplifier). In other words, the controller controls the temperature of the cooling water. It has a temperature control function, a flow rate restriction function, and a pH management function, and can be adjusted with the flow rate control valve 12. It would be even more beneficial to simplify the equipment configuration.
【００１２】0012
以上詳細に説明した如く本考案は、冷却水のＰＨ及び流量を制御するものであ るから、熱交換器パイプが腐食したり、侵食したりしないようにすることが出来 る。従って冷却水が油圧作動油に混合するのを防止できる。 As explained in detail above, the present invention controls the pH and flow rate of cooling water. This prevents heat exchanger pipes from corroding or eroding. Ru. Therefore, it is possible to prevent the cooling water from mixing with the hydraulic fluid.
【図１】本考案の第１実施例を示す油圧作動油冷却装置
の系統図である。FIG. 1 is a system diagram of a hydraulic fluid cooling device showing a first embodiment of the present invention.
【図２】本考案の第２実施例を示す油圧作動油冷却装置
の系統図である。FIG. 2 is a system diagram of a hydraulic fluid cooling device showing a second embodiment of the present invention.
【図３】本考案の第３実施例を示す油圧作動油冷却装置
の系統図である。FIG. 3 is a system diagram of a hydraulic fluid cooling device showing a third embodiment of the present invention.
【図４】従来の油圧作動油冷却装置の系統図である。FIG. 4 is a system diagram of a conventional hydraulic oil cooling device.
１ 油圧タンク ２ 油圧作動油 ３ 油圧配管 ４ 油圧ポンプ ５ 熱交換器 ６ 水道水 ７ 冷却配管 ８、１０ サーモスタット １１ 作動アンプ １２ 流量調整弁 １５ ＰＨ検出器 １６ 制御装置 １７ 閉止弁 １８ 流量検出器 １９ 制御装置 ２０ 流量調節弁 1 Hydraulic tank 2 Hydraulic oil 3 Hydraulic piping 4 Hydraulic pump 5 Heat exchanger 6 Tap water 7 Cooling piping 8, 10 Thermostat 11 Operating amplifier 12 Flow rate adjustment valve 15 PH detector 16 Control device 17 Shutoff valve 18 Flow rate detector 19 Control device 20 Flow control valve
Claims (3)
る油圧作動油冷却装置において、油圧作動油の冷却水配
管に閉止弁を設けると共に、同冷却水のＰＨを検出する
ＰＨ検出器を設け、同ＰＨをＰＨ検出器で検出し、この
検出値が予め与えられた値の範囲外となったとき前記閉
止弁で冷却水を停止することを特徴とする油圧作動油冷
却装置。Claim 1: In a hydraulic oil cooling system having a heat exchanger between hydraulic oil and cooling water, a shutoff valve is provided in the hydraulic oil cooling water piping, and a PH detector detects the pH of the cooling water. 1. A hydraulic fluid cooling device, characterized in that the pH is detected by a PH detector, and when the detected value falls outside a predetermined value range, the cooling water is stopped by the shutoff valve.
る油圧作動油冷却装置において、油圧作動油の冷却水配
管に流量調節弁を設けると共に、同冷却水の流量を検出
する流量検出器を設け、同流量を流量検出器で検出し、
この検出値が予め与えられた値以上にならないように前
記流量調節弁で冷却水を調節することを特徴とする油圧
作動油冷却装置。2. In a hydraulic oil cooling system having a heat exchanger between hydraulic oil and cooling water, a flow rate control valve is provided in the hydraulic oil cooling water piping, and a flow rate detection device that detects the flow rate of the cooling water is provided. Detect the same flow rate with a flow rate detector,
A hydraulic fluid cooling device characterized in that the cooling water is adjusted by the flow rate regulating valve so that the detected value does not exceed a predetermined value.
る油圧作動油冷却装置において、油圧作動油の冷却水配
管に閉止弁と流量調節弁を設け、かつ冷却水のＰＨを検
出するＰＨ検出器と冷却水の流量を検出する流量検出器
を設け、前記ＰＨをＰＨ検出器で検出し、この検出値が
予め与えられた値の範囲外となったとき前記閉止弁で冷
却水を停止し、また前記流量を流量検出器で検出し、こ
の検出値が予め与えられた値以上にならないように前記
流量調節弁で冷却水を調節することを特徴とする油圧作
動油冷却装置。3. In a hydraulic oil cooling system having a heat exchanger between hydraulic oil and cooling water, a shutoff valve and a flow rate control valve are provided in the hydraulic oil cooling water piping, and the pH of the cooling water is detected. A PH detector and a flow rate detector for detecting the flow rate of cooling water are provided, the PH is detected by the PH detector, and when the detected value is outside a predetermined value range, the shutoff valve shuts off the cooling water. A hydraulic fluid cooling system characterized in that the cooling water is stopped, the flow rate is detected by a flow rate detector, and the cooling water is adjusted by the flow rate control valve so that the detected value does not exceed a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991028222U JP2535593Y2 (en) | 1991-04-01 | 1991-04-01 | Hydraulic oil cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991028222U JP2535593Y2 (en) | 1991-04-01 | 1991-04-01 | Hydraulic oil cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04117204U true JPH04117204U (en) | 1992-10-20 |
| JP2535593Y2 JP2535593Y2 (en) | 1997-05-14 |
Family
ID=31912358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991028222U Expired - Fee Related JP2535593Y2 (en) | 1991-04-01 | 1991-04-01 | Hydraulic oil cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2535593Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008200936A (en) * | 2007-02-19 | 2008-09-04 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Water supply system for injection molding die |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101809915B1 (en) * | 2016-06-02 | 2017-12-20 | 주식회사 삼정산업기계 | Hydraulic oil cooling apparatus for vibrator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51148619A (en) * | 1975-06-16 | 1976-12-21 | Kobe Steel Ltd | Method of suppling cooling water in continuous casting installation |
| JPS60192108A (en) * | 1984-03-12 | 1985-09-30 | Toshiba Corp | Oil cooler for hydraulic elevator |
| JPS629401A (en) * | 1985-07-08 | 1987-01-17 | Mitsubishi Electric Corp | Process controller |
| JPH0261329A (en) * | 1988-08-26 | 1990-03-01 | Toshiba Corp | Nitrogen oxide controller for gas turbine |
-
1991
- 1991-04-01 JP JP1991028222U patent/JP2535593Y2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51148619A (en) * | 1975-06-16 | 1976-12-21 | Kobe Steel Ltd | Method of suppling cooling water in continuous casting installation |
| JPS60192108A (en) * | 1984-03-12 | 1985-09-30 | Toshiba Corp | Oil cooler for hydraulic elevator |
| JPS629401A (en) * | 1985-07-08 | 1987-01-17 | Mitsubishi Electric Corp | Process controller |
| JPH0261329A (en) * | 1988-08-26 | 1990-03-01 | Toshiba Corp | Nitrogen oxide controller for gas turbine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008200936A (en) * | 2007-02-19 | 2008-09-04 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Water supply system for injection molding die |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2535593Y2 (en) | 1997-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0943070B1 (en) | Modulating fluid control device | |
| KR100869734B1 (en) | Constant temperature liquid circulating device having piping protecting function | |
| JPH04117204U (en) | Hydraulic oil cooling system | |
| US4393854A (en) | Mixing unit | |
| JPH0131004B2 (en) | ||
| RU2282792C2 (en) | Method and device for control of water flow temperature | |
| JPS6179911A (en) | System heating fluid in fluid supply circuit | |
| JP3053895B2 (en) | Operation control method and apparatus for feed water pump | |
| JPH05259676A (en) | Cooling apparatus | |
| JP2553000Y2 (en) | Multi-can installation of vacuum hot water boiler | |
| CN215831672U (en) | Desalted water pressure stabilizing system | |
| JPS63238379A (en) | Cooling device | |
| KR102497474B1 (en) | Water management system using water quality measuring device for water pipe | |
| CN110836697B (en) | Method for detecting water flow in closed pipeline | |
| JP3768292B2 (en) | Oxygen gas supply pressure control method, oxygen gas supply pressure control device, oxygen gas introduction control method, and oxygen gas introduction control device | |
| CN110088559B (en) | Cooling tower adjusting method and system | |
| SU1333952A1 (en) | Method of preventing break-down of feed of power-generating unit | |
| KR101912761B1 (en) | Pump operation detecting system and method of boiler cascade system | |
| JPS5898191A (en) | Controller for purification of water in activated sludge process | |
| JPH038035Y2 (en) | ||
| JPH0238024Y2 (en) | ||
| JP3894646B2 (en) | Pressure regulating mechanism | |
| JPH074645Y2 (en) | Disconnection protection device for fluid control system | |
| JPS61220009A (en) | Pressure controller for metal hydride tank | |
| SU1634175A1 (en) | Device for air temperature control in modular greenhouses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961217 |
|
| LAPS | Cancellation because of no payment of annual fees |