EP1133662B1 - Dispositif d'equilibrage hydraulique automatique - Google Patents

Dispositif d'equilibrage hydraulique automatique Download PDF

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Publication number
EP1133662B1
EP1133662B1 EP99956115A EP99956115A EP1133662B1 EP 1133662 B1 EP1133662 B1 EP 1133662B1 EP 99956115 A EP99956115 A EP 99956115A EP 99956115 A EP99956115 A EP 99956115A EP 1133662 B1 EP1133662 B1 EP 1133662B1
Authority
EP
European Patent Office
Prior art keywords
valve
orifice
module
membrane
radiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99956115A
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German (de)
English (en)
French (fr)
Other versions
EP1133662A1 (fr
Inventor
Pierre Fridmann
Jacky Leger
Jean-Philippe Robin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Comap SA
Original Assignee
Comap SA
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Filing date
Publication date
Application filed by Comap SA filed Critical Comap SA
Publication of EP1133662A1 publication Critical patent/EP1133662A1/fr
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Anticipated expiration legal-status Critical
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Classifications

    • 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
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1018—Radiator valves

Definitions

  • the present invention relates to a balancing device hydraulics for a heating installation.
  • a heating installation is equipped with a boiler or the like for heating a fluid which is sent via pumping means to transmitters heat, including radiators, through a network of pipes Hydraulic.
  • the device according to the invention also ensures regulation thermostatic of a heat emitter.
  • the present invention also relates to hydraulic circuits using fan coil units. It adapts equally well to heating circuits than cold water circuits used to cool Locals. The description below is essentially made with reference to heating circuits but it also applies to refrigeration techniques in which a cold water network, or another fluid, is put in artwork.
  • balancing is carried out of the heating circuit.
  • This balancing operation consists of adjusting the different adjusting members so as to obtain flow rates beforehand calculated under basic conditions chosen to size different plant equipment operating in steady state.
  • flow rates are caused to vary during operation, it this must be taken into account at the design stage and if necessary provide differential pressure regulators mounted in series or in parallel. This is then the domain of regulation and no longer of balancing hydraulic.
  • balancing devices also called organs balancing, which allow hydraulic balancing of a heating installation. These organs are intended to regulate the distribution flows in the different branches of the distribution circuits.
  • non-adjustable balancing members These are diaphragms, that is to say fixed calibrated orifices whose diameter is determined for each of them from knowledge of the flow / pressure drop couple to be created.
  • the use of this type of organ involves a complete and careful hydraulic calculation of all the circuits of the installation to precisely determine the characteristics of each diaphragm. In case of calculation error, there is only one solution which is to change the diaphragm. This solution, a priori relatively little expensive, is therefore very rarely used.
  • adjustable balancing devices known as the name, for example, of adjustment fittings or balancing valves. These organs make it possible to regulate the flow in a circuit and therefore to balance it based on prior knowledge of the flow / loss couple charge to be created. This implies a complete hydraulic calculation of all heating circuit.
  • adjustable balancing members allow easily correct the setting in the event of an error.
  • This type of balancing device presents the installer with a very appreciable advantage.
  • this type of material has no direct relation to hydraulic balancing of the installations as defined above.
  • the use of such a flow regulator can be considered a palliative solution to insufficient calculation by replacing an organ relatively simple static balancing by a regulating device with moving parts only for the purpose of avoiding operation initial adjustment according to one of the procedures mentioned above.
  • the use of these flow regulators is limited because, on the one hand its scope is limited due to incompatibility with thermostatic valves and, on the other hand, because of a cost higher investment than traditional solutions.
  • FIGs 1 and 2 each show a circuit derived from a heating installation provided with balancing members. Of these two Figures, there are radiators 2 supplied with heat transfer fluid by pipes 4. Figure 1 shows radiators 2 fitted with valves traditional while in Figure 2, the radiators 2 are provided with a integrated taps. In Figures 1 and 2, there is each time a main supply line 6 and main return line 8. The branch circuit is connected at branch 10 to the pipe main supply 6 and at a branch 12 to the pipe main return 8. Upstream of bypass 10 allowing the supply of the derived hydraulic circuit, there is a tap balancing 14. Downstream of this branch 10, is generally arranged an isolation valve 16 which does not play a particular role in circuit balancing. At the foot of each branch circuit is another balancing valve 21. The latter is adjustable and allows the loss to be adjusted of the derivative circuit.
  • each radiator 2 is provided upstream of its supply of a thermostatic valve 18 and upstream of a connection setting 20.
  • Thermostatic valve 18 ensures the function of thermostatic regulation of the room temperature the radiator 2 while the adjustment fitting 20 ensures hydraulic balancing.
  • a hydraulic module 22 allows the supply of a radiator 2 and each radiator 2 is provided with a thermostatic tap 24.
  • the thermostatic valve housing 24 also houses a adjustment fitting. So there is a hydraulic module 22 which allows the supply of heat-transfer fluid to the radiator 2, a tap thermostatic providing thermostatic regulation and a connection of setting (not referenced) attached to the thermostatic valve to ensure hydraulic balancing.
  • the document EP-0 677 708 describes in principle a hot water heating system with several radiators hydraulically connected to each other in at least one line. These radiators each have a valve to control the flow of fluid crossing the radiator.
  • the valves associated with the radiators are constituted by differential pressure control valves fitted preferably with a setpoint adjustment device. No concrete embodiment of such a device is revealed by this document.
  • the present invention therefore aims to provide a device balancing to resolve balancing issues currently encountered with existing balancing bodies.
  • the device it offers is a device hydraulic balancing device according to claims 1 to 8.
  • the means allowing displacement of the valve as a function of the pressure difference at the level of the first orifice have a membrane separating a housing in two bedrooms, one bedroom being connected to the upstream of the first orifice and the other chamber being in connection with the downstream of this first orifice.
  • a compensating spring acting on the membrane is advantageously planned.
  • the balancing device comprises preferably also means making it possible to move the valve depending on the temperature of the room in which the device is located, these means acting on the opening and closing either of the first or of the second port.
  • the means enabling the valve to move in function the temperature of the room in which the device is located advantageously a thermostatic head, of the type of that existing in a thermostatic valve.
  • the means allowing a movement of the valve as a function of the temperature of the room in which the device is located act on a second valve disposed at the level of the first orifice.
  • a preferred embodiment provides that the first body has the first opening, a valve controlling the opening and the closing of this orifice as well as a thermostatic head acting on the valve, and that the second body has a tared membrane possibly by a spring and integral with a valve acting on the second orifice made inside this second body.
  • one side of the membrane is advantageously connected to the first body via of a cane or the like and the other side of the membrane is advantageously connected to the first body by a radiator.
  • one side of the membrane is for example connected to the first body through a pipe or the like and the other side of the membrane is for example connected to the first body by a radiator and a pipe.
  • the present invention also relates to a module hydraulic system intended to supply heat transfer fluid to a heat, including a radiator, and to collect the fluid leaving the heat emitter, characterized in that it comprises one of the bodies of a balancing device as described above.
  • a module is more specially designed for a radiator with integrated valves.
  • This module receives fluid supply and return lines coolant, and through flexible pipes forming a device generally called a harness, sends the heat transfer fluid to the radiator inlet and collects the heat transfer fluid leaving it.
  • the device balancing can be upstream or downstream of the transmitter heat.
  • the invention also relates to a radiator. according to claims 9 and 10.
  • the automatic balancing device with which it is fitted is hydraulically either upstream or downstream of the radiator.
  • Figures 1 and 2 show circuits derived from a heating installation equipped with balancing members of the prior art
  • Figure 3 shows two derivative circuits with organs balancing according to the invention
  • Figure 4 shows a radiator fitted with a hydraulic module independent and of a balancing device according to a first form of production
  • Figure 5 shows a radiator with integrated hydraulic module fitted of the balancing device of FIG. 4,
  • FIG 6 shows on an enlarged scale and in section a dispenser can be used for a radiator as shown in Figure 4,
  • FIG. 7 shows on an enlarged scale and in section a module can be used for a radiator as shown in Figure 5,
  • Figure 8 shows a heating circuit with a distribution centralized equipped with balancing devices according to the invention.
  • Figure 9 shows part of an individual heating circuit centralized equipped with a balancing device according to the invention.
  • Figures 1 and 2 have already been described in the preamble to the this patent application.
  • Figure 3 shows two circuits derived from a heating circuit.
  • the circuits derived from FIGS. 1 and 2 we has a main supply line 6 and a main supply line return 8.
  • Each branch circuit also includes two radiators 2 mounted in parallel. In each case, they are tap radiators integrated. However, the invention can also be applied to radiators with traditional taps. These radiators 2 are powered in heat transfer fluid through pipes 4.
  • a hydraulic module 26 allows the supply of a radiator 2 with heat transfer fluid. It incorporates a hydraulic balancing device according to the invention.
  • Each derivative circuit also includes at the top and bottom at each time an isolation valve 16.
  • an isolation valve 16 it is possible to isolate totally hydraulically a circuit derived from the rest of the circuit heater. This is sometimes necessary during an intervention on by example a radiator.
  • Figure 4 shows in section and schematically a first embodiment of a hydraulic balancing member according to the invention.
  • the latter has a fluid inlet 30 corresponding to a pipe supply 84 and a fluid outlet 32 corresponding to a pipe back 86.
  • the device Between input 30 and output 32, the device has a first adjustable orifice 34 and a second orifice 36 whose opening and closing are regulated by a valve 38.
  • the valve 38 has a head 40 and a rod 42.
  • the head 40 is intended to open and close the second orifice 36. Its shape is adapted in the form of a seat produced at the second orifice 36.
  • the rod of valve 42 extends through a chamber 44 produced in a first body 88 of the balancing device and closed by a membrane 46.
  • the body 88 contains the flow control seat 36, the valve 38 corresponding, the membrane 46 and a compensation spring 56. A face of the membrane, that opposite to the chamber 44, is subjected to the supply line pressure 84.
  • the flow control seat 36 is in turn formed between the return of fluid from the radiator 2 and return line 86.
  • the membrane 46 is therefore subjected on one side to the pressure P1 and on the other hand at the pressure P2.
  • the spring compensation 56 is provided on the side where this lower pressure prevails.
  • This spring 56 surrounds the valve stem 42. It rests on the one hand on the membrane 46 and on the other hand on the body 88 at the level of the passage 54.
  • the membrane 46 is in a middle position for a pressure difference P1-P2 given and its position varies when the pressure difference P1-P2 varies.
  • the pressure losses created by the radiator 2 and the rod 92 are small, even negligible, compared to the existing pressure drop between upstream and downstream of the first orifice 34.
  • a second valve 62 associated with the first orifice 34, controls the opening of it.
  • This valve 62 is controlled by a head thermostatic 48.
  • the thermostatic head 48, the valve 62 and the first orifice 34 are mounted in a second body 90 connected to the body 88 by a rod 92, which extends the supply line 84.
  • the valve 62 controls the passage of fluid leaving this rod to enter the radiator 2.
  • the operation of the device is as follows. We suppose that heat transfer fluid is brought to the inlet 30 by, for example, a pump not shown.
  • the device according to the invention functions as a flow regulator. Indeed, if the pressure P1 increases, the flow through the device will tend to increase. However, this pressure P1 is transmitted to the right part of the membrane 46. This membrane then tends, under the effect of a higher pressure P1, to move to the left (with reference to Figures 4 and 5). This movement of the membrane tends to close the second orifice 36 via the valve 38. As a result, the flow through the device according to the invention is decreased. The increase in throughput created by the increase in pressure P1 is therefore countered by the decrease in flow caused by the closing of the valve 38.
  • the thermostatic head 48 will act on the valve 62. This will then modify the opening at the level of the first orifice 34.
  • valve 62 tends to close the first port 34 thus causing a drop in the heat transfer fluid flow.
  • the thermostatic head acts on the valve 62 in the direction of opening the orifice 34.
  • the action of the second valve 62 modifies the fall of pressure at the orifice 34, thereby causing an action on the first valve 38.
  • the thermostatic head 48 acts on the second valve 62. If the temperature increases, the valve 62 opens, the pressure P1 remains constant while P2 increases. The first valve 38 therefore opens also, allowing a higher flow. On the contrary, if the temperature decreases, the valve 62 closes, the pressure P1 remains constant, the pressure P2 decreases and the valve 38 also closes. The flow through the device is decreased.
  • the balancing device is identical, but in one case there is a body 88 placed in a hydraulic module 26 independent of the radiator 2 (FIG. 4) and in the other case, a body 88 placed in a module 26 integrated into the radiator 2 (Figure 5).
  • Figure 6 shows another embodiment of a body 88 intended to equip a radiator, while being independent of this radiator.
  • the body 88 here has a substantially triangular shape. At heart of this triangle, is placed the membrane 46 and the valve 38 which is associated. This valve is shown here in the closed position.
  • the body 88 has a first entry 102 which corresponds to the fluid inlet 30 of FIG. 4, a first fluid outlet 104 which corresponds to the outlet to the rod 92, a second inlet 106 which corresponds to the return of the radiator 2 to the body 88 and a second outlet 108 which corresponds to the outlet 32.
  • a passage 110 is provided for directly join entrance 102 and exit 104.
  • One side of the membrane 46 is oriented towards this passage 110.
  • the peripheral edge of the membrane 46 rests at a shoulder 112. This edge is held by a ring 114 which itself is held in the body by a plug 116.
  • An opening has been made in the body 88 facing the membrane 46 to allow the establishment of the valve 38, the membrane 46 and the plug 116 closes this opening.
  • At this plug 116 is associated with a support disc 118 in which are provided orifices 120 so that the face of the membrane 46 oriented towards the passage 110 is subjected to the pressure of the fluid passing through it passage 110.
  • the valve 38 is placed in a housing 122 in which is also a guide piece 124 for the valve 38.
  • the latter is for example glued to the membrane 46. It has a tubular shape and a longitudinal section of this valve has a T shape. The base of the T is oriented towards the second entry 106. Thus, it reigns inside the valve 38 the pressure P2 which also prevails in the radiator 2. From so that this pressure P2 is also exerted on the other face of the membrane 46, that is to say the face opposite to the passage 110, the part the valve located on the side of the membrane 46 has openings putting inside the valve 38 with the outside.
  • the passage from the second entrance 106 to the second exit 108 is controlled by valve 38.
  • Figure 7 shows an embodiment of a module hydraulics corresponding to the module shown in Figure 5.
  • the body 88 has a general shape in H.
  • the central bar of the H houses the membrane 46 and valve 38.
  • the valve 38 is also a tubular valve provided on the side of the membrane 46 openings 126. It is also guided in a guide piece 124.
  • the originality here lies in the fact that the body is made in two parts that can pivot relative to each other.
  • a first part is referenced 88 while the other part is referenced 89.
  • the part 89 carries the first input 102 and the second output 108 and is connected to the central heating network while the first part 88 is connected at the first exit 104 and the second entry 106 at radiator 2.
  • the part 89 has a substantially tubular part horizontal from which two tubular legs in which are made the first entry 102 and the second exit 108.
  • the part substantially horizontal tubular form the pivot axis of the body 88 on the second part 89.
  • the body 88 is made in two parts. The junction between these two parts is done at the level of the membrane 46.
  • this membrane is sandwiched between the two parts of the body 88.
  • a fixing flange and screws are provided to allow the fixing of these two parts of the body 88. These flanges and these screws are not shown in the drawing.
  • the membrane 46 seals between the two component parts of the body 88.
  • O-rings 128 are provided for sealing between the second body 89 and body 88.
  • module 26 presents the advantage of being able to adapt to almost all situations mounting. Whatever the relative orientations of the inlet pipes water and radiator connection pipes, module 26 can adapt to the situation.
  • Figure 8 shows an alternative embodiment for a device according to the invention. While the embodiment of Figures 4 and 5 is suitable for a heating circuit in which the distribution is carried out by two tubes (twin-tube distribution), the radiators being mounted in parallel between these two tubes, or in which the distribution is carried out by a tube (single tube distribution), the radiators then being mounted in series on the tube, the embodiment of Figure 8 is suitable for a distribution centralized or octopus.
  • FIG 8 is a schematic view showing a circuit with four radiators 2.
  • the distribution of heat transfer fluid is ensured from two collectors.
  • a first collector 94 receives the heat transfer fluid from a boiler or other source and distributes it to the radiators 2.
  • the second collector 96 collects the heat transfer fluid after the latter has passed through the radiators 2.
  • Four pipes 98 leave from the first collector 94 and each connect the latter to a radiator 2, while four other pipes 100 each connect a radiator 2 to the second collector 96.
  • modules 88 ' As seen in Figure 8, near the collectors 94 and 96, there are modules 88 '. These are identical to the bodies 88 Figures 4 and 5. Therefore, the valve, the diaphragm and the spring contained in modules 88 'have not been shown. We find indeed in the modules 88 'exactly the same configuration as in the bodies 88. At each radiator 2, there is a box 90 'identical to body 90 of Figures 4 and 5. For the same reasons, it was not shown inside the boxes 90 '.
  • a module 26 as shown in Figures 6 and 7 can also adapt to an individual centralized heating circuit.
  • a primary loop including two sections of tubes 150 are shown in Figure 9.
  • a secondary loop 152 which includes in the present example two radiators 2 supplied in parallel.
  • Module 26 is mounted between the secondary loop and the primary loop.
  • Secondary loop 152 has, downstream of the hydraulic module 26, a control valve 16 ' which allows the supply or the cut of the supply of the loop secondary 152.
  • a thermostatic head 48 is provided at this level. 16 'valve. The hydraulic module 26 associated with the valve 16 'and the head thermostatic 48 thus produces a balancing device according to the invention.
  • each emitter of heat of the installation is provided with a hydraulic balancing device according to the invention, hydraulic balancing and thermostatic regulation are automatically insured.
  • the devices according to the invention will maintain the chosen flow rate at the given setpoints. More precisely, each device according to the invention will maintain the flow between high and low limit values defined by its proportional band.
  • this device is intended to replace the tap traditional thermostatic by adding an additional function to it, hydraulic balancing.
  • the dimensioning of a radiator is done differently. Indeed, we impose the flow circulating in the heat emitter and there is a drop of -variable temperature between the inlet and the outlet of the radiator. Of course, temperature drops are expected to occur in a acceptable range, such as an interval from 5 to 20 degrees.
  • the device according to the invention makes the actions of flow and temperature regulation, which is not the case with existing materials. Indeed, in the preamble to this request for patent, it is explained why, in the prior art, flow regulators are incompatible with a heating installation fitted with taps Thermostatic. By combining these two elements, flow regulator and thermostatic valve, in an original way, the invention allows perform both automatic hydraulic balancing and thermostatic regulation.
  • the movement of the valve or valves is controlled by a membrane and / or a thermostatic head. It is all possible to act on the valve (s) using a motor electric electronically controlled. It is thus conceivable to measure the pressure difference on either side of the first orifice of the device according to the invention and to have a temperature probe to measure the room temperature. These measures are then transformed in electrical signals and, after processing by an electronic unit, a control signal is sent to an electric motor controlling the position of the corresponding valve to determine the opening thereof.
  • a balancing device can be integrated into a hydraulic module which is itself integrated in a radiator. he can also find its place on a radiator in which the taps is not integrated. This device could for example be mounted instead a thermostatic tap on a traditional radiator.
  • thermostatic faucet artwork It is enough to have an orifice creating a loss dump. It can be a predetermined hole, an adjustable hole, a tap for example, or an electrically controlled orifice functions of various parameters.
  • thermostatic head or other means allowing to make a displacement as a function of the temperature
  • these means can be mounted in series with the means acting according to the pressure difference.
  • the means allowing to carry out a displacement depending on the temperature could then for example act on the membrane described in the exemplary embodiments described above.

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  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Temperature-Responsive Valves (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Cyclones (AREA)
  • Transplanting Machines (AREA)
  • Vehicle Body Suspensions (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Centrifugal Separators (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Heat Treatment Of Articles (AREA)
  • Testing Of Balance (AREA)
  • Earth Drilling (AREA)
  • Soil Working Implements (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Control Of Fluid Pressure (AREA)
EP99956115A 1998-11-25 1999-11-22 Dispositif d'equilibrage hydraulique automatique Expired - Lifetime EP1133662B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9815007 1998-11-25
FR9815007A FR2786257B1 (fr) 1998-11-25 1998-11-25 Dispositif d'equilibrage hydraulique destine a une installation de chauffage
PCT/FR1999/002873 WO2000031475A1 (fr) 1998-11-25 1999-11-22 Dispositif d'equilibrage hydraulique automatique

Publications (2)

Publication Number Publication Date
EP1133662A1 EP1133662A1 (fr) 2001-09-19
EP1133662B1 true EP1133662B1 (fr) 2003-05-02

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EP99956115A Expired - Lifetime EP1133662B1 (fr) 1998-11-25 1999-11-22 Dispositif d'equilibrage hydraulique automatique

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US (1) US6394361B1 (nl)
EP (1) EP1133662B1 (nl)
JP (1) JP2002530624A (nl)
KR (1) KR100729349B1 (nl)
CN (1) CN1161565C (nl)
AT (1) ATE229160T1 (nl)
AU (1) AU1279100A (nl)
BE (1) BE1012415A3 (nl)
CA (1) CA2352112C (nl)
DE (2) DE69904360T3 (nl)
FR (1) FR2786257B1 (nl)
GB (1) GB2344163B (nl)
NL (1) NL1013665C2 (nl)
PL (2) PL348726A1 (nl)
WO (1) WO2000031475A1 (nl)

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DE10256021B4 (de) * 2002-11-30 2010-02-04 Danfoss A/S Wärmetauscher-Ventilanordnung, insbesondere Heizkörper-Ventilanordnung
DE10256035B3 (de) * 2002-11-30 2004-09-09 Danfoss A/S Wärmetauscher-Ventilanordnung, insbesondere Heizkörper-Ventilanordnung
US7458520B2 (en) * 2005-04-19 2008-12-02 Masco Corporation Of Indiana Electronic proportioning valve
GB0603233D0 (en) * 2006-02-17 2006-03-29 Heat Energy And Associated Tec A method and apparatus for commissioning a central heating system
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FR2931226B1 (fr) * 2008-05-19 2013-08-16 Acome Soc Coop Production Procede et systeme de controle d'un circuit hydraulique a plusieurs boucles d'echange de chaleur
US8109289B2 (en) * 2008-12-16 2012-02-07 Honeywell International Inc. System and method for decentralized balancing of hydronic networks
US20130256423A1 (en) * 2011-11-18 2013-10-03 Richard G. Lord Heating System Including A Refrigerant Boiler
US9534795B2 (en) * 2012-10-05 2017-01-03 Schneider Electric Buildings, Llc Advanced valve actuator with remote location flow reset
BR112018008605B1 (pt) * 2015-11-04 2022-11-29 E.On Sverige Ab Conjunto de consumidores de energia térmica locais e método para controlar um permutador de calor de consumidor de energia térmica
EP3165831A1 (en) * 2015-11-04 2017-05-10 E.ON Sverige AB A district thermal energy distribution system
US10578318B2 (en) * 2016-09-01 2020-03-03 Computime Ltd. Single thermostat with multiple thermostatic radiator valve controllers
CN111561574A (zh) * 2020-05-19 2020-08-21 福建省海洋阀门科技有限公司 双调节温控阀门

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Also Published As

Publication number Publication date
EP1133662A1 (fr) 2001-09-19
DE69904360D1 (de) 2003-01-16
WO2000031475A1 (fr) 2000-06-02
CA2352112C (fr) 2007-10-09
CN1161565C (zh) 2004-08-11
DE19956819A1 (de) 2000-05-31
KR100729349B1 (ko) 2007-06-15
PL336735A1 (en) 2000-06-05
PL348726A1 (en) 2002-06-03
US6394361B1 (en) 2002-05-28
KR20010080552A (ko) 2001-08-22
FR2786257A1 (fr) 2000-05-26
DE69904360T3 (de) 2009-10-01
GB9927611D0 (en) 2000-01-19
PL192078B1 (pl) 2006-08-31
JP2002530624A (ja) 2002-09-17
NL1013665C2 (nl) 2000-05-30
CN1328630A (zh) 2001-12-26
GB2344163B (en) 2003-05-21
CA2352112A1 (fr) 2000-06-02
GB2344163A (en) 2000-05-31
FR2786257B1 (fr) 2001-01-12
ATE229160T1 (de) 2002-12-15
BE1012415A3 (fr) 2000-10-03
AU1279100A (en) 2000-06-13

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