CN101551676A - Flow control system - Google Patents
Flow control system Download PDFInfo
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- CN101551676A CN101551676A CNA2009101295767A CN200910129576A CN101551676A CN 101551676 A CN101551676 A CN 101551676A CN A2009101295767 A CNA2009101295767 A CN A2009101295767A CN 200910129576 A CN200910129576 A CN 200910129576A CN 101551676 A CN101551676 A CN 101551676A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Flow Control (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The present invention relates to a flow control system, capable of automatically switching to a jaw opening control to control without halt of the system when it is not able to control the flow. In an actual flow normality/abnormality judge part (25C), the normality/abnormality of an actual flow of a fluid measured by an actual flow measurement part (25B) is judged. When the judge of the actual flow normality/abnormality judge part (25C) is abnormal, a connection mode of a mode switching switch (SW1) of a control mode switching part (25D) is switched from a mode (flow control mode ) of selectively outputting the actual flow (QR) of the actual flow measurement part (25B) to a valve control part (25A) to a mode (jaw opening control mode) of selectively outputting an actual jaw opening (8Rhov) from a valve jaw opening detector (16) to THE valve control part (25A).
Description
Technical field
The present invention relates to control the flow control system of flow of the fluid in the stream of flowing through.
Background technology
In the past, as this flow control system, the air-conditioner control system (for example, with reference to patent documentation 1,2) of the flow of controlling the thermal medium (hot and cold water) that flows to air conditioner was arranged.In this air-conditioner control system, in the supply passageway of the hot and cold water that flows to air conditioner, be provided with flowrate control valve, drive the valve body in this flowrate control valve, regulate the switching amount of the stream that hot and cold water flows through.
Usually, flowrate control valve is set the aperture signal except receiving from air conditioning control device, goes back the actual aperture signal of the valve body of receiving valve jaw opening sensor measurement, and the driving of application valve body is so that it is consistent with actual aperture signal to set the aperture signal.Such flowrate control valve is called aperture control type flowrate control valve.
On the other hand, in recent years, the additional unit of actual flow of fluid of stream of flowing through that is used to detect has been proposed in flowrate control valve self, the setting flow signal that will be equivalent to setting aperture signal in the past from air conditioning control device is transported to flowrate control valve, the driving of application valve body is so that the setting flow signal that receives in the flowrate control valve is consistent with the actual flow that measures.Such flowrate control valve is called the flow control type flowrate control valve.
And then, also have in flowrate control valve, for example shown in the patent documentation 3, combination aperture control type and flow control type can be selected any the flowrate control valve in aperture control and the flow control.
Patent documentation 1: Japanese kokai publication hei 11-211191 communique
Patent documentation 2: Japanese kokai publication hei 06-272935 communique
Patent documentation 3: TOHKEMY 2003-232658 communique
But in the flowrate control valve of above-mentioned flow control type in the past, the unit of measuring actual flow produces unusual, energy measurement actual flow not just, when perhaps the actual flow of Ce Lianging is incorrect, owing to can not carry out correct flow control again, the halt system of just having to.
In addition, even can select any the flowrate control valve in control of above-mentioned aperture and the flow control, owing to can not automatically control selection, can only manually carry out, if just can not handle so the unit that exists the maintainer not know to detect actual flow produces unusual situation, before the maintainer reaches the spot, can not handle such problem.
Summary of the invention
The present invention makes in order to solve such problem, and its purpose is, provides a kind of in the time can not carrying out flow control, can automatically transfer to aperture control, halt system not, the flow control system of proceeding to control.
In order to realize such purpose, flow control system of the present invention is provided with: valve body, the switching amount of the stream that its regulated fluid is flowed through; The valve opening detecting unit, it detects the actual aperture of this valve body; The flow through actual flow of fluid of above-mentioned stream of actual flow measuring unit, its measurement; The normal/abnormal judging unit of actual flow, it is judged the normal/abnormal of being measured by this actual flow measuring unit of fluid actual flow; Mode switch element, when it is unusual in the normal/abnormal judgment unit judges of this actual flow, be to select the pattern of the actual aperture of the valve body that output detects by above-mentioned valve opening detecting unit as the mode switch of controlled variable as controlled variable from the actual flow of selecting the fluid that output measured by above-mentioned actual flow measuring unit; Valve control unit, VCU, its controlled variable that this mode switch element is selected output is controlled the driving of above-mentioned valve body, so that this controlled variable is consistent with the setting value of the controlled quentity controlled variable that above-mentioned valve body is provided as input.
By the present invention, if the actual flow that is judged as the fluid of being measured by the actual flow measuring unit is for unusual, just export the actual aperture of the valve body that by valve opening detecting unit detect pattern as controlled variable (feedback quantity) as the mode switch of controlled variable (feedback quantity) for selection by the actual flow of the fluid of actual flow measuring unit measurement from selection output, the driving of application valve body is so that the controlled variable (the actual aperture of valve body) of this selection output is consistent with the setting value of the controlled quentity controlled variable that valve body is provided.Thus, when judging that actual flow is unusual, can automatically preceding thus flow control switch to aperture control.
In the present invention, the normal/abnormal judgement of the actual flow of the fluid of measuring by the actual flow measuring unit, can judge according to the value of the actual flow of the measured fluid of actual flow measuring unit, or measure in the measuring process of actual flow of fluid employed parameter value according to the actual flow measuring unit and judge, perhaps collection/non-the collecting of measuring employed parameter in the measuring process of actual flow of fluid according to the actual flow measuring unit judged.
For example, when the value of the fluid actual flow of being measured by the actual flow measuring unit surpasses predefined unusual threshold value, judge that actual flow is unusual.In addition, measure employed parameter in the measuring process of actual flow of fluid as the actual flow measuring unit, when the upstream side force value of the valve body in using stream or downstream force value, its force value surpasses predefined unusual threshold value, or because communication abnormality can not collect the time, judges that actual flow is unusual.
In addition; in the present invention; judged result in the normal/abnormal judging unit of actual flow from abnormal restoring just often; is to select the pattern of the actual flow of the fluid that output measured by the actual flow measuring unit as controlled variable from the actual aperture of selecting the valve body that output detects by the valve opening detecting unit as the mode switch of controlled variable; can normally obtain actual flow constantly, can preceding thus aperture control automatically revert to flow control.Usually, because flow control can be controlled the flow of fluid more accurately than aperture control, in the time can normally obtaining actual flow, preferably revert to flow control from aperture control.
By the present invention, if the actual flow of the fluid that the actual flow measuring unit is measured is judged as unusually, be to select the pattern of the actual aperture of the valve body that output detects by the valve opening detecting unit as the mode switch of controlled variable just as controlled variable from the actual flow of selecting the fluid that output measured by the actual flow measuring unit, the driving of application valve body, so that the controlled variable (the actual aperture of valve body) of this selection output is consistent with the setting value of the controlled quentity controlled variable that valve body is provided, in the time can not carrying out flow control, automatically transfer to aperture control, can halt system, proceed control.
Description of drawings
Fig. 1 is the instrumentation diagram of an example that the air-conditioner control system of flow control system of the present invention has been used in expression.
Fig. 2 is the figure of the major part of the flowrate control valve that uses in this air-conditioner control system of expression.
Symbol description among the figure:
1: heat source machine; 2: pump; 3: the water outlet collector pipe; 4: outlet pipeline; 5: air conditioner; 6: water return pipeline; 7: the backwater collector pipe; 8: flowrate control valve; 9: the feed air temperature sensor; 10: air conditioning control device; 11: coil pipe; 12: pressure fan; 13: pipeline; 14: valve body; 15: motor; 16: the valve opening detecting device; 17: display part; 18,19: communication interface; 20: the design discharge storage part; 21: the unusual threshold value storage part of actual flow; 22: abnormal pressure threshold value storage part; 23:1 side pressure sensor; 24:2 side pressure sensor; 25: handling part; 25A: valve control part; 25B: actual flow measurement section; 25C: the normal/abnormal judging part of actual flow; 25C1: actual flow value monitoring unit; 25C2: force value monitoring unit; 25C3: communication abnormality monitoring unit; 25D: control model switching part; 25E: control model notice portion; SW1: mode selector switch.
Embodiment
Below, the present invention will be described in detail with reference to the accompanying drawings.Fig. 1 is the instrumentation diagram of an example that the air-conditioner control system of flow control system of the present invention has been used in expression.
In Fig. 1,1 for generating the heat source machine of hot and cold water, 2 is the pump of carrying the hot and cold water of heat source machine 1 generation, 3 for mixing the water outlet collector pipe from the hot and cold water of a plurality of heat source machines 1,4 is outlet pipeline, 5 air conditioners for the supply of the hot and cold water accepting to transport via outlet pipeline 4 from water outlet collector pipe 3,6 is water return pipeline, 7 is to make heat interchange in the air conditioner 5 after the backwater collector pipe that the hot and cold water of being returned by water return pipeline 6 conveyings returns, 8 the flowrate control valve to providing the flow of hot and cold water to control from water outlet collector pipe 3 to air conditioner 5 is provided, 9 for measuring from the feed air temperature sensor of the feed air temperature of air conditioner 5 outputs, 10 is air conditioning control device, 11 is the coil pipe of air conditioner 5, and 12 is pressure fan.
In this air-conditioner control system,, in water outlet collector pipe 3, mix by pump 2 force feeds and by the hot and cold water of heat source machine 1 heating, offer air conditioner 5 by outlet pipeline 4, by air conditioner 5 by water return pipeline 6 as backwater, turn back to backwater collector pipe 7, by pump 2 force feeds, in above path, circulate again.For example, when refrigerating operaton, generate cold water in heat source machine 1, this cold water circulates.When the heating operation, in heat source machine 1, generate hot water, this hot water circulates.
Fig. 2 is the figure of the major part of the flowrate control valve 8 in this air-conditioner control system of expression.Flowrate control valve 8 possesses: pipeline 13, its formation make the stream by the hot and cold water inflow of air conditioner 5; The flow through flow (the switching amount of stream) of fluid of this pipeline 13 of valve body 14, its adjusting; Motor 15, it drives this valve body 14; Valve opening detecting device 16, its actual aperture that detects valve body 14 is as valve opening θ pv; Display part 17; Communication interface 18,19, the communication between its relaying air conditioning control device 10 and the monitoring arrangement (not shown); Design discharge storage part 20; The unusual threshold value storage part 21 of actual flow; Abnormal pressure threshold value storage part 22; 1 side pressure sensor 23, the pressure of the fluid of the upstream side of the valve body 14 in its signal piping 13 is as 1 pressure P 1; 2 side pressure sensor 24, the pressure of the fluid in the downstream of the valve body 14 in its signal piping 13 is as 2 pressure P 2; And handling part 25.
Handling part 25 possesses: valve control part 25A, actual flow measurement section 25B, the normal/abnormal judging part 25C of actual flow, control model switching part 25D and the control model notice 25E of portion.The normal/abnormal judging part 25C of actual flow possesses actual flow value monitoring unit 25C1, force value monitoring unit 25C2 and communication abnormality monitoring unit 25C3.
Actual flow measurement section 25B, being input, flow through the actual flow QR of fluid of pipeline 13 as the measured value of actual flow according to these calculation of parameter from 1 pressure P l of the fluid of 1 side pressure sensor 23, from 2 pressure P 2 of the fluid of 2 side pressure sensor 24 with from the valve opening θ pv of valve opening detecting device 16.
Control model switching part 25D possesses mode selector switch SW1.Mode selector switch SW1 according to the normal/abnormal judged result from the normal/abnormal judging part 25C of actual flow, controls the connection mode of this switch.The back that is controlled at about this mode selector switch SW1 is described, if the judged result from the normal/abnormal judging part 25C of actual flow is normal, adopt the connection mode that is connected with contact A side, if judge unusually, adopt the connection mode be connected with contact B side from the judged result of the normal/abnormal judging part 25C of actual flow.In original state, mode selector switch SW1 adopts the connection mode that is connected with contact A side.
Valve control part 25A in this handling part 25, actual flow measurement section 25B, the normal/abnormal judging part 25C of actual flow, control model switching part 25D and the control model notice 25E of portion can realize with the CPU processing capacity according to program.
And, in the present embodiment, in the design discharge storage part 20, storing operational design discharge QD to this flowrate control valve B regulation.In addition, store the value of actual flow QR of the fluid of the pipeline 13 of flowing through that actual flow measurement section 25B is measured in the unusual threshold value storage part 21 of actual flow, stipulating the upper limit threshold Qth1 and the lower threshold Qth2 of the bound of its normal range.In addition, storing upper limit threshold P1th1 and lower threshold P1th2 in the abnormal pressure threshold value storage part 22 at 1 pressure P 1 value that detects by 1 side pressure sensor 23, and the upper limit threshold P2thl and the lower threshold P2th2 that are worth at 2 pressure P 2 that detect by 2 side pressure sensor 24.
In addition, communication abnormality monitoring unit 25C3, monitor 2 pressure P 2 whether can collecting 1 pressure P 1 detecting by 1 side pressure sensor 23 and to detect by 2 side pressure sensor 24, because situations such as pressure transducer generation fault or order wire are cut off, in the time can not collecting the pressure of any one party at least (during non-collection) be judged as communication abnormality, the mode selector switch SW1 of control model switching part 25D switches to the connection mode that is connected with contact B side.
Below, in conjunction with the function of each several part in the handling part 25, illustrate the characteristic processing in this flowrate control valve 8 is moved.And, in the present example,, suppose the setting value of controlled quentity controlled variable to be chosen for the control setting command of 0～100% value by air conditioning control device 10 for the temperature with the controlling object zone remains on design temperature, offer flowrate control valve 8.
(just often)
In flowrate control valve 8, by communication interface 18, be provided for valve control part 25A from the control setting command (0～100%) of air conditioning control device 10.At this moment, the mode selector switch SW1 among the control model switching part 25D adopts the connection mode that is connected with contact A side.
Therefore, the actual flow QR from actual flow measurement section 25B is input among the valve control part 25A as controlled variable (feedback quantity).In addition, at this moment, the control model notice 25E of portion, according to the selection output state of the actual flow QR among the control model switching part 25D to valve control part 25A, being judged as present control model is flow control mode, gives valve control part 25A with this context notification.
And the control model notice 25E of portion is that the content of flow control mode is presented on the display part 17 with present control model, and by communication interface 19 to air conditioning control device 10 and monitoring arrangement output.
Valve control part 25A, acceptance is the notice of flow control mode from the present control model of the control model notice 25E of portion, 20D reads design discharge QD from the design discharge storage part, design discharge QD as 100% value, will be scaled flow from the control setting command (0～100%) of air conditioning control device 10.And, sending instruction to motor 15, the driving of application valve body 14 is so that the control setting command that is scaled this flow is with consistent from the actual flow QR of actual flow measurement section 25B.
(unusual time)
In the drive controlling of this valve body 14, in the normal/abnormal judging part 25C of actual flow, the normal/abnormal of measuring among the actual flow measurement section 25B of actual flow QR judged.
At this moment, in actual flow value monitoring unit 25C1, will be from the value of the actual flow QR of actual flow measurement section 25B as input, the value of this actual flow QR compares with the upper limit threshold Qth1 and the lower threshold Qth2 that are stored in the unusual threshold value storage part 21 of actual flow, the value of actual flow QR did not enter by the state continuance in the normal range of its bound threshold value defined during the stipulated time, judged that actual flow QR is unusual.
In force value monitoring unit 25C2, will from the value of 1 pressure P l of 1 side pressure sensor 23 and from the value of 2 pressure P 2 of 2 side pressure sensor 24 as input, with upper limit threshold P1th1 and the lower threshold Plth2 that are stored in the abnormal pressure threshold value storage part 22 at 1 pressure P l, upper limit threshold P2thl and lower threshold P2th2 at 2 pressure P 2 compare, at least one side did not enter by the state continuance in the normal range of its bound threshold value defined during the stipulated time in 1 pressure P 1 value and 2 pressure P 2 values, judged that actual flow QR is unusual.
In communication abnormality monitoring unit 25C3, will from 1 pressure P l of 1 side pressure sensor 23 and from 2 pressure P 2 of 2 side pressure sensor 24 as input, because the fault of 1 side pressure sensor 23 or 2 side pressure sensor 24, the perhaps communication abnormality that is cut off etc. of order wire, in the time of can not collecting 1 pressure P l and 2 pressure P 2 when collection (non-), be judged as unusual.
Actual flow value monitoring unit 25C1, force value monitoring unit 25C2, communication abnormality monitoring unit 25C3, if judge that actual flow QR is unusual, this judged result is sent to control model switching part 25D, and the mode selector switch SW1 among the control model switching part 25D switches to the connection mode that is connected with contact B side.
Thus, in valve control part 25A, input as controlled variable (feedback quantity), substitutes before this actual flow QR from actual flow measurement section 25B from the actual aperture θ pv of valve opening detecting device 16.In addition, at this moment, the control model notice 25E of portion according to the selection output state of the actual aperture θ pv among the control model switching part 25D to valve control part 25A, judges that present control model is the aperture control model, and gives valve control part 25A with this context notification.
And the control model notice 25E of portion shows that on display part 17 present control model is the content of aperture control model, and exports to air conditioning control device 10 and monitoring arrangement by communication interface 19.
Valve control part 25A, acceptance is the notice of aperture control model from the present control model of the control model notice 25E of portion, send instruction to motor 15, the driving of application valve body 14 is so that consistent with the actual aperture θ pv from valve opening detecting device 16 from the control setting command (0～100%) of air conditioning control device 10.
Thus, judge when actual flow QR is unusual that preceding thus automatically flow control switches to aperture control, halt system is not proceeded control.
(normal) from abnormal restoring
If the judged result among the normal/abnormal judging part 25C of actual flow is for normal from abnormal restoring; if i.e. actual flow value monitoring unit 25C1; force value monitoring unit 25C2; judged result all is normal among the communication abnormality monitoring unit 25C3, and then the mode selector switch SW1 among the control model switching part 25D switches to the connection mode that is connected with contact A side.
Thus, in valve control part 25A, will import as controlled variable (feedback quantity), substitute actual aperture θ pv before this from valve opening detecting device 16 from the actual flow QR of actual flow measurement section 25B.In addition, at this moment, the control model notice 25E of portion, according to the selection output state of the actual flow QR among the control model switching part 25D to valve control part 25A, being judged as present control model is flow control mode, gives valve control part 25A with this context notification.
Valve control part 25A, acceptance is the notice of flow control mode from the present control model of the control model notice 25E of portion, 20D reads design discharge QD from the design discharge storage part, the value of design discharge QD is made as 100%, will be scaled flow from the control setting command (0～100%) of air conditioning control device 10.And, sending instruction to motor 15, the driving of application valve body 14 is so that the control setting command that is scaled this flow is with consistent from the actual flow QR of actual flow measurement section 25B.
Thus, in the moment that normally obtains actual flow QR, automatically preceding thus aperture control reverts to flow control.Usually, flow control can be controlled fluid flow more accurately than aperture control.Therefore, in the present embodiment,, revert to flow control from aperture control in the moment that normally obtains actual flow QR.
Claims (5)
1. flow control system is characterized in that possessing:
Valve body, the switching amount of the stream that its regulated fluid is flowed through;
The valve opening detecting unit, it detects the actual aperture of this valve body;
The flow through actual flow of fluid of above-mentioned stream of actual flow measuring unit, its measurement;
The normal/abnormal judging unit of actual flow, it is judged the normal/abnormal of being measured by this actual flow measuring unit of fluid actual flow;
Mode switch element, when it is unusual in the normal/abnormal judgment unit judges of this actual flow, be to select the pattern of the actual aperture of the valve body that output detects by above-mentioned valve opening detecting unit as the mode switch of controlled variable as controlled variable from the actual flow of selecting the fluid that output measured by above-mentioned actual flow measuring unit;
Valve control unit, VCU, its controlled variable that this mode switch element is selected output is controlled the driving of above-mentioned valve body, so that this controlled variable is consistent with the setting value of the controlled quentity controlled variable that above-mentioned valve body is provided as input.
2. flow control system according to claim 1 is characterized in that,
The normal/abnormal judging unit of above-mentioned actual flow comes the normal/abnormal of actual flow of above-mentioned fluid judged according to the value of the actual flow of the measured fluid of above-mentioned actual flow measuring unit.
3. flow control system according to claim 1 is characterized in that,
The normal/abnormal judging unit of above-mentioned actual flow is measured employed parameter value in the measuring process of actual flow of fluid according to above-mentioned actual flow measuring unit, the normal/abnormal of above-mentioned fluid actual flow judged.
4. flow control system according to claim 1 is characterized in that,
The normal/abnormal judging unit of above-mentioned actual flow is measured collection/non-the collecting of employed parameter in the measuring process of actual flow of fluid the normal/abnormal of actual flow of above-mentioned fluid is judged according to above-mentioned actual flow measuring unit.
5. according to each described flow control system in the claim 1～4, it is characterized in that,
Above-mentioned mode switch element; judged result in the normal/abnormal judging unit of above-mentioned actual flow is for just often from abnormal restoring; from the actual aperture of selecting the valve body that output detects by above-mentioned valve opening detecting unit pattern, switch to fluid actual flow that output measured by above-mentioned actual flow measuring unit the pattern of selecting as controlled variable as controlled variable.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008089912A JP5066474B2 (en) | 2008-03-31 | 2008-03-31 | Flow control system |
| JP2008089912 | 2008-03-31 | ||
| JP2008-089912 | 2008-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101551676A true CN101551676A (en) | 2009-10-07 |
| CN101551676B CN101551676B (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101295767A Active CN101551676B (en) | 2008-03-31 | 2009-03-31 | Flow control system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5066474B2 (en) |
| KR (1) | KR101114625B1 (en) |
| CN (1) | CN101551676B (en) |
| TW (1) | TWI381259B (en) |
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| JP4268926B2 (en) * | 2004-11-12 | 2009-05-27 | メタウォーター株式会社 | Membrane filtration operation control system |
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2009
- 2009-01-14 TW TW098101199A patent/TWI381259B/en active
- 2009-02-17 KR KR1020090012867A patent/KR101114625B1/en active IP Right Grant
- 2009-03-31 CN CN2009101295767A patent/CN101551676B/en active Active
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| CN111033103A (en) * | 2017-09-07 | 2020-04-17 | 东京流量仪器仪表株式会社 | Flow rate control device |
| CN111033103B (en) * | 2017-09-07 | 2020-11-13 | 东京流量仪器仪表株式会社 | Flow rate control device |
| CN107588223A (en) * | 2017-09-27 | 2018-01-16 | 安徽华斯源新能源科技有限公司 | A kind of HVAC end wireless digital amount intelligent regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200941170A (en) | 2009-10-01 |
| JP2009245096A (en) | 2009-10-22 |
| CN101551676B (en) | 2012-06-13 |
| KR101114625B1 (en) | 2012-03-05 |
| JP5066474B2 (en) | 2012-11-07 |
| KR20090104650A (en) | 2009-10-06 |
| TWI381259B (en) | 2013-01-01 |
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