WO2014020606A1 - Procédé et système pour commander un écoulement de liquide - Google Patents

Procédé et système pour commander un écoulement de liquide Download PDF

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Publication number
WO2014020606A1
WO2014020606A1 PCT/IL2013/050652 IL2013050652W WO2014020606A1 WO 2014020606 A1 WO2014020606 A1 WO 2014020606A1 IL 2013050652 W IL2013050652 W IL 2013050652W WO 2014020606 A1 WO2014020606 A1 WO 2014020606A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
valve
control valve
pipe
control
Prior art date
Application number
PCT/IL2013/050652
Other languages
English (en)
Inventor
Eitan Furst
Original Assignee
Eitan Furst
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eitan Furst filed Critical Eitan Furst
Publication of WO2014020606A1 publication Critical patent/WO2014020606A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1393—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures characterised by the use of electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0015—Domestic hot-water supply systems using solar energy
    • F24D17/0021—Domestic hot-water supply systems using solar energy with accumulation of the heated water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/088—Draining arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal

Definitions

  • the present invention relates to controlling liquid flow, in general and, in particular, to a method and system for controlling flow of hot water or other hot liquid.
  • FIG. 1 A typical conventional water flow system is illustrated in Fig. 1.
  • Many conventional water flow systems today include a hot water source 2, such as a boiler, solar heater, that are used to provide a user with hot water.
  • These systems also include hot water pipes 3 which connect the hot water source 2 to a dispensing device 5, e.g. a shower or sink faucet, bidet, etc., not located close to the point of use.
  • a dispensing device 5 e.g. a shower or sink faucet, bidet, etc.
  • these systems also include a cold water pipe 4 connecting a main source of water 1 to the dispensing device.
  • dispensing device 5 When dispensing device 5 is open, water flows from hot water source 2 through pipe 3 and out of spout 7 under gravitational force or under pressure.
  • pipe 3 remains filled with hot or warm water that did not reach spout 7 while the dispensing device 5 was open.
  • the leftover water at lower temperature remaining in the water pipes must first be drained from the pipes and replaced by the hot water from the tank. Therefore, the next time the user opens the dispensing device 5, the remaining cooled water inside pipe 3 flows out, first, before it is replaced with fresh hot water from the hot water source 2. Since the pipe 3 from the hot water source to the dispensing device is typically quite long, it contains a large quantity of water which will go to waste before the user receives water of a desired temperature.
  • the present invention relates to a method and system for controlling the water or other liquid flow in pipes in locations where the source of liquid is disposed at a distance from the point of use.
  • a valve is closed to stop the hot water flow shortly before the user has finished using the water (showering, washing dishes, etc.).
  • the user then continues to use the heated water until it stops flowing from the pipe, at which time he or she turns off the faucet.
  • the pipes are drained in such a way that the drained liquid can be used, and no heated water is wasted, as all the heated water in the pipes is used.
  • the method includes opening a controllable control valve disposed in a liquid pipe permitting liquid to flow through the liquid pipe from a source of liquid to a liquid outlet valve, opening the liquid outlet valve, selectably closing the control valve, stopping inflow of liquid through the valve to the liquid pipe, and draining the liquid from the liquid pipe below the control valve through the liquid outlet valve.
  • the step of draining includes maintaining the liquid outlet valve open, and the method further includes closing the liquid outlet valve when the liquid pipe between the control valve and the liquid outlet is drained of liquid.
  • the step of draining further includes introducing air into the liquid pipe below the control valve.
  • a system for controlling liquid flow including a source of liquid, and a liquid outlet with a liquid outlet valve, the system further including a controllable control valve disposed in a liquid pipe, the pipe extending between the source of liquid and the liquid outlet, the control valve controlling flow of liquid from the liquid source into the liquid pipe, and a control switch for actuating switching of the control valve between two states: a first when the control valve is closed; and a second, when the control valve is open.
  • the liquid outlet is disposed lower than the source of liquid or, at least, lower than the control valve.
  • the system further includes a venting valve, disposed in the liquid pipe below the control valve, for introducing air into the liquid pipe when the control valve is closed.
  • each of the controllable control valve and the venting valve includes switching circuitry, actuated by the control switch, for causing the control valve to open when the venting valve is closed, and to cause the control valve to close when the venting valve is open.
  • the system further includes a valve controller coupled to the control switch and actuated thereby, and including switching circuitry coupled to the controllable control valve and to the venting valve for causing them to switch states when actuated by the control switch.
  • the valve controller further includes a device for determining when a pre-set quantity of liquid has passed through the control valve and automatically actuating the switching circuitry to close the control valve and open the venting valve when the pre-set quantity of liquid has passed through the control valve.
  • venting valve is a controllable valve controlled by the control switch. In other embodiments, the venting valve can be a check valve or other one-way valve.
  • FIG. 1 is a schematic illustration of a conventional prior art water flow system
  • Fig. 2 is a schematic illustration of a water flow system constructed and operative in accordance with one embodiment of the present invention
  • Fig. 3 shows an enlarged detailed view of a control box, suitable for use in the system of Fig. 2;
  • Fig. 4 is a schematic illustration of a water flow system constructed and operative in accordance with another embodiment of the present invention.
  • Fig. 5 is a schematic illustration of an electric valve controller, according to an alternative embodiment of the invention.
  • the present invention provides a method and system for controlling the water or other liquid flow in pipes, reducing wasted water and wasted energy.
  • the invention is particularly useful in locations where the source of liquid is located a relatively long distance from the point of use, which typically results in a large amount of standing liquid in the pipes. This water tends to cool by exchanging heat with the environment, to temperatures below what users desire, particularly in cold countries.
  • substantially the heated water is drained from the pipe and used by the user, before the water outlet is closed. This is accomplished by closing a control valve disposed in the pipe between the liquid source and the liquid outlet valve, shortly before the user has finished using the hot water. Closing the valve prevents the flow of liquid from the liquid source into the pipe.
  • the user holds open the faucet or dispensing valve at the liquid outlet so as to use the heated water flowing out and emptying the pipe of all the heated water.
  • the liquid outlet is disposed lower than the source of liquid, to take advantage of the gravitational force.
  • the system is also operative when the control valves are disposed relatively close to the liquid source and the control valves (not necessarily the liquid source) are higher than the liquid outlet.
  • the source can be lower than the outlet and the liquid can be lifted to the valves by means of the water system pressure or a pump.
  • heated water flow by way of non-limiting example only, for which they are particularly suited, in order to quickly and efficiently provide a user with hot water from a source of hot water and, at the same time, prevent waste of water while the user waits for heated water to arrive at the outlet.
  • a controllable valve into the pipe carrying hot water from the source of hot water, e.g. a hot water tank or boiler, to a hot water dispensing valve, for example, a faucet in a shower.
  • the valve is electrically operated.
  • This valve hereinafter: a control valve, controls the flow of liquid from the source into the pipe.
  • the control valve can be reversibly switched between a normally closed state, wherein the control valve prevents the flow of hot water from the source of hot water to the dispensing valve, stopping the flow of hot water through the pipe, and an open state, wherein the control valve allows the flow of hot water from the source of hot water to the dispensing valve.
  • the water pipe essentially, can be divided into three pipe sections: a first pipe section which connects the water source to the control valve; a second section of pipe, which connects the control valve to the venting valve; and a third section of pipe, which connects the second section from the venting valve to a dispensing device.
  • a first pipe section which connects the water source to the control valve
  • a second section of pipe which connects the control valve to the venting valve
  • a third section of pipe which connects the second section from the venting valve to a dispensing device.
  • the system further includes a control switch operated by the user, first to reversibly switch the control valve from the normally closed state to the open state, and then to switch the control valve from the open state back to the closed state.
  • the control switch preferably is disposed adjacent the dispensing device, for easy access by the user.
  • the switch preferably will be disposed in an adjacent wall with a waterproof covering and/or suitably insulated to prevent entry of water into the contacts and creating an electric shock to the user, as known.
  • a control wire electrically may connect the control switch to the control valve.
  • a wireless control system can be utilized, or a pneumatic actuating button coupled to an electric switch.
  • the valve can be moved between the two states manually.
  • the control valve is a solenoid operated valve.
  • the control valve is disposed in a control box for protection against unintentional actuation or damage, but providing ease of access, when necessary. In this way, little to no water remains in the second and third pipe sections once the dispensing valve has been closed.
  • emptying of the pipe can be facilitated by introducing a second valve, a venting valve, in sequence into the pipe, which introduces ambient or pressurized air to the pipe section, thereby lowering the vacuum formed in the pipe to a point where it has a minimal effect on dispensing of the water.
  • the venting valve can be a one-way valve or a check valve preventing the outflow of water through the valve.
  • the one-way valve When a certain level of vacuum is reached inside the pipe, the one-way valve will open, introducing air into the pipe and facilitating the outflow of water from the pipe.
  • the venting valve can also be a controllable valve, that can be reversibly switched between a normally open state, wherein the venting valve permits ambient air to enter the pipe, and a closed state, wherein the venting valve blocks the flow of ambient air into the pipe.
  • the same control switch that actuates the control valve to open can, at the same time, actuate the venting valve close, and vice versa.
  • the same arrangement of a control valve, with or without a venting valve can be introduced into the pipe leading cold water from a source of cold water, e.g., the main water conduit system, to the water dispensing device, for example, the dispensing valve or faucet in a shower.
  • a source of cold water e.g., the main water conduit system
  • the water dispensing device for example, the dispensing valve or faucet in a shower.
  • the liquid and venting valves arrangement can be limited to a hot water pipe only. However, providing the same arrangement for the cold water pipe helps to avoid an unbalanced change in water pressure when the hot water is drained during use, when the control valve is switched to the closed state.
  • System 10 for controlling liquid flow according to some embodiments of the present invention.
  • System 10 includes a source 22 of hot liquid, here shown as a hot water tank or solar boiler, disposed higher than a liquid outlet, here illustrated as a dispensing device 25 (a shower faucet) with spout 27.
  • a hot water pipe 30 couples the hot water source 22 to the dispensing device 25, and a cold water pipe 40 couples a cold water inlet 15 to the dispensing device 25.
  • a controllable control valve (not shown) is disposed in liquid pipe 30, the control valve controlling flow of liquid through the pipe.
  • a venting valve (not shown) is also disposed in the liquid pipe 30, below the control valve, introducing air to the liquid pipe when the control valve is closed.
  • control valve and the venting valve are housed in a control box 6.
  • a control switch 14 is provided for controlling the valves in the control box by actuating switching of the control valve between closed and open states and, of the venting valve, in embodiments wherein it is a controllable electronic valve, between open and closed states.
  • control box 6 holds at least one, and possibly two control valves 8.
  • a first control valve 8 is disposed in hot water pipe 30.
  • a second control valve 8' is disposed in cold water pipe 40.
  • Control switch 14 is electrically coupled to the valves in the control box, as via a control wire 16.
  • Water pipes 30 and 40 have three sections: pipe sections 23, 24 coupled to the hot and cold water sources, respectively, pipe sections 31 and 41 extending between the control valves and the venting valves, and pipe sections 33, 44 leading to the dispensing device.
  • control valves 8, 8' are in a normally closed state, wherein they block the flow of water from pipe sections 23 and 24 to pipe sections 31 and 41, respectively.
  • Venting valves 9, 9' are in a normally open state, wherein ambient air is introduced into the lower pipe sections 33, 34. Venting valves 9, 9' facilitate the draining of pipe sections 31, 41, and 33, 44 when control valves 8, 8' are closed and dispensing valve 25 is open, by allowing ambient air to enter pipe sections 31 and 41.
  • dispensing valve 25 is closed by the user when no more water flows out through the dispensing valve, pipe sections 31, 41, and 33, 44 have been drained of water by gravitation and have been filled with air that entered through the venting valves.
  • pressurized air can be introduced through venting valves 9, 9' to urge the liquid in the pipes to drain out the outlet valve.
  • an electric valve controller 18 is provided, coupled to control switch 14, for controlling the valves.
  • Valve controller 18 includes switching circuitry and is electrically coupled to the valves, as via wires 20, and to control switch 14, as via control wire 16.
  • control switch 14 When control switch 14 is activated, valve controller 18 causes control valves 8, 8' to switch to the open state and venting valves 9, 9' to switch to the closed state. And when control switch 14 is turned off, valve controller 18 causes control valves 8, 8' to switch to the closed state and venting valves 9, 9' to switch to the open state.
  • a separate control switch 14 can be provided for direct actuation of each valve, in which case, valve controller 18 is not required.
  • the switching circuitry can be an integral part of the liquid and venting valves, themselves, or of the outlet valve or faucet.
  • System 50 includes a liquid source 52, a control box 54 holding at least one control valve (not shown) and, possibly, at least one venting valve (not shown).
  • the valves in control box 54 are connected to the liquid outlet valve 56, here illustrated as a shower faucet.
  • the operation of the systems of Figs. 2-4 is as follows.
  • the operation of the system will be as follows.
  • a user wants to receive hot water from the hot water source 22 to a dispensing or liquid outlet valve
  • the user turns on the control switch 14, which causes control valve 8 to open and also causes venting valve 9 to close.
  • the user opens dispensing valve 25
  • water flows from the hot water source 22 through pipe section 23 of pipe 30 to pipe sections 31 and 33.
  • the user turns off the control switch 14 which, in turn, causes the control valves 8 to close and causes venting valve 9 to open.
  • Closing the control valve 8 blocks the flow of water from pipe section 23 to pipe section 31.
  • Opening venting valve 9 introduces ambient or pressurized air to pipe sections 31 and 33. This, in turn, aids draining of pipe sections 31 and 33 though spout 27 by gravitation, as long as dispensing valve 25 remains open.
  • the user can leave dispensing valve 25 open and continue to use the water remaining in the pipes until no water exits spout 27, to ensure that no more water is left in these pipe sections.
  • venting valve is a check valve that operates on vacuum, there is no need for the control switch to operate the venting valve. Rather, the venting valve operates as a function of the pressure in the pipe.
  • This embodiment provides a simplified system, as no controller is required to open and close the venting valves.
  • control valves 8, 8' and venting valves 9, 9' are described herein above as electrically activated solenoid valves, alternatively, they may be any other suitable controllable valves, e.g., manual, mechanical, electrical, hydraulically operated, or any other controllable valves.
  • the dispensing valve itself, is an electrical faucet which is configured so that turning on the faucet automatically actuates the control valve, to permit the flow of liquid from the source. If there is an electrically controllable venting valve, the faucet will activate the controller to actuate both the valves. Otherwise, operation is the same as described above with a separate actuator.
  • valve controller 18 may include a device for automatically closing the control valve 8 at a pre- set time shortly before the user typically finishes use, so as to provide enough time to drain the water from the pipes through use.
  • This device can be a timer or a flow sensor or any other device for determining a quantity of liquid passing through the control valve.
  • Fig. 5 is a schematic illustration of an electric valve controller 18' including a device for determining liquid quantity 60 having a switch for activating and deactivating valve 8. When the control switch 14 is activated, the device for determining liquid quantity 60 is turned on, as via wire 16', and, in turn, switches the control valve 8 to the open state, as via wire 64 or using wireless communication.
  • the liquid quantity determining device 60 automatically switches the control valve back to the closed state, without requiring the user to actuate the control switch 14. The user may then continue to use the water flow until the pipes are drained of water.
  • the device for determining liquid quantity 60 is coupled to switching circuitry 62 that activates valves 8 and 9, as via wire 20' or using wireless communication, ensuring that, when control valve 8 is in one state, then venting valve 9 is switched to the opposite state.
  • the present invention saves energy, since substantially all the heated water is used, and energy is not wasted heating water that remains in the pipes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

L'invention porte sur un procédé et sur un système pour commander un écoulement de liquide, lequel procédé met en œuvre l'ouverture d'une vanne de commande pouvant être commandée disposée dans un tuyau de liquide, permettant à un liquide de s'écouler à travers le tuyau de liquide à partir d'une source de liquide jusqu'à une vanne de sortie de liquide, l'ouverture de la vanne de sortie de liquide, la fermeture d'une façon pouvant être sélectionnée de la vanne de commande, l'arrêt de l'écoulement d'entrée de liquide à travers la vanne vers le tuyau de liquide, et le drainage du liquide à partir du tuyau de liquide en dessous de la vanne de commande à travers la vanne de sortie de liquide.
PCT/IL2013/050652 2012-07-31 2013-07-31 Procédé et système pour commander un écoulement de liquide WO2014020606A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261677498P 2012-07-31 2012-07-31
US61/677,498 2012-07-31

Publications (1)

Publication Number Publication Date
WO2014020606A1 true WO2014020606A1 (fr) 2014-02-06

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Application Number Title Priority Date Filing Date
PCT/IL2013/050652 WO2014020606A1 (fr) 2012-07-31 2013-07-31 Procédé et système pour commander un écoulement de liquide

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105783295A (zh) * 2014-12-16 2016-07-20 张仕霖 一种太阳能热水器管道排空连接系统
CN110422929A (zh) * 2019-09-05 2019-11-08 朱兆明 一种生活污水处理系统及其污水处理方法
IT202200001139A1 (it) * 2022-01-24 2023-07-24 Energard S R L – Soc Di Ingegneria Metodo di svuotamento di un condotto, e sistema per l’implementazione di detto metodo

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086806A (en) * 1991-04-05 1992-02-11 Boyd Coffee Company Automatic flow control system and flood protector
WO1994000309A1 (fr) * 1992-06-29 1994-01-06 Huron Plastics Group, Inc. Clapet d'aeration unidirectionnel
CA2599443A1 (fr) * 2005-03-15 2006-09-28 Illinois Tool Works Inc. Clapet anti-retour de ventilation pour cloueuse
CN2896138Y (zh) * 2006-04-29 2007-05-02 康继昌 太阳能热水器排水装置
CN201412982Y (zh) * 2009-02-03 2010-02-24 耿显福 即开即用热水太阳能热水器
US20110162726A1 (en) * 2008-09-01 2011-07-07 Takayuki Ito Protective cover for canister vent solenoid valve
CN202177243U (zh) * 2011-05-18 2012-03-28 刘达 太阳能热水器节能节水防冻即热洗浴装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086806A (en) * 1991-04-05 1992-02-11 Boyd Coffee Company Automatic flow control system and flood protector
WO1994000309A1 (fr) * 1992-06-29 1994-01-06 Huron Plastics Group, Inc. Clapet d'aeration unidirectionnel
CA2599443A1 (fr) * 2005-03-15 2006-09-28 Illinois Tool Works Inc. Clapet anti-retour de ventilation pour cloueuse
CN2896138Y (zh) * 2006-04-29 2007-05-02 康继昌 太阳能热水器排水装置
US20110162726A1 (en) * 2008-09-01 2011-07-07 Takayuki Ito Protective cover for canister vent solenoid valve
CN201412982Y (zh) * 2009-02-03 2010-02-24 耿显福 即开即用热水太阳能热水器
CN202177243U (zh) * 2011-05-18 2012-03-28 刘达 太阳能热水器节能节水防冻即热洗浴装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105783295A (zh) * 2014-12-16 2016-07-20 张仕霖 一种太阳能热水器管道排空连接系统
CN110422929A (zh) * 2019-09-05 2019-11-08 朱兆明 一种生活污水处理系统及其污水处理方法
IT202200001139A1 (it) * 2022-01-24 2023-07-24 Energard S R L – Soc Di Ingegneria Metodo di svuotamento di un condotto, e sistema per l’implementazione di detto metodo

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