EP0797057B1 - Ensemble de soupape avec pompe intégrée pour chaudière mixte chauffage / eau sanitaire - Google Patents

Ensemble de soupape avec pompe intégrée pour chaudière mixte chauffage / eau sanitaire Download PDF

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Publication number
EP0797057B1
EP0797057B1 EP96110213A EP96110213A EP0797057B1 EP 0797057 B1 EP0797057 B1 EP 0797057B1 EP 96110213 A EP96110213 A EP 96110213A EP 96110213 A EP96110213 A EP 96110213A EP 0797057 B1 EP0797057 B1 EP 0797057B1
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EP
European Patent Office
Prior art keywords
assembly
water
sub
valve
fitting
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
EP96110213A
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German (de)
English (en)
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EP0797057A3 (fr
EP0797057A2 (fr
Inventor
Giuseppe Fugazza
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FUGAS Srl
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FUGAS Srl
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Publication of EP0797057A3 publication Critical patent/EP0797057A3/fr
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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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components

Definitions

  • the present invention concerns a valve assembly adapted for being used in combined plants for providing both heating and sanitary hot water, i.e. residential plants wherein the same heat source, particularly a wall-mounted gas-fired boiler, is used for heating both the water for the heat spreading elements (radiators) for heating the rooms, and the sanitary or domestic hot water for various purposes.
  • the same heat source particularly a wall-mounted gas-fired boiler
  • EP-A-0 568 122 in the name of the same applicant discloses a valve assembly formed by two sub-assemblies or valve units for a combined plants for heating and sanitary hot water comprising a gas burner, a (main) gas/water heat exchanger, a water/water heat exchanger connectable through a three-way valve into the heating water circuit, at least a radiator and a pump for circulating the heating water.
  • a pipe fitting for the connection with the main heat exchanger In the body of a first unit of such assembly there are formed the three-way valve, a pipe fitting for the connection with the main heat exchanger, a fitting for the connection with the radiators, an outlet fitting for the domestic water, two pipe fittings for the connection with the water/water heat exchanger, a manostat and a bypass valve with an associated outlet fitting.
  • a depression device In the body forming the second unit of such assembly there are formed a depression device, a pipe fitting for the connection with the radiator, an inlet fitting for the domestic water, an outlet fitting towards the pump, and two fittings for the connection with said water/water heat exchanger.
  • valve assembly for a combined plant as claimed in claim 1.
  • valve assembly according to the invention is partially similar - from the working viewpoint - to that of the above mentioned European patent n. 568 122.
  • Fig.s 11, 11A and 11B it is shortly discussed the general operation of a plant capable of supplying both heating and hot sanitary water and incorporating a valve assembly according to the invention.
  • the valve assembly according to the invention is connected to a plant for supplying both heating and sanitary hot water, i.e. a plant adapted to produce hot water in a closed circuit comprising heat radiators and, upon request, to erogate tap sanitary hot water for general purposes, the plant using a same primary heat source, such as a gas burner.
  • a plant for supplying both heating and sanitary hot water i.e. a plant adapted to produce hot water in a closed circuit comprising heat radiators and, upon request, to erogate tap sanitary hot water for general purposes, the plant using a same primary heat source, such as a gas burner.
  • the gas burner 1 heats through a (main) finned heat exchanger 2 the water in a room heating circuit with such water being circulated by a pump P.
  • the burner is fired by a microswitch 155 controlled by a manostat or pressure switch 15 to be described hereinbelow.
  • This heated water reaches a valve 4 of the three-way type that under normal conditions directs the water to the radiators or radiating elements, indicated as a whole by the single element R, through the fitting 5 and is returned to the pump P through a heating return fitting 6.
  • the three-way valve 4 closes the passage 5 towards the radiators and delivers the hot water to a second water/water heat exchanger 17 (for example of the metal sheet type) where such hot water heats the domestic water incoming from the fitting 8 (that is from the waterworks).
  • the domestic water is then delivered through the outlet fitting (and conduit) 9 to the taps for erogating the hot water, schematically indicated by the single tap RE in the Figure.
  • valve assembly according to the invention is substantially formed by two sub-assemblies or valve units I and II, enclosed by dashed squares in Fig. 11, and made almost exclusively of a composite plastic material. More particularly according to the invention, each of the sub-assemblies I and II is formed as a one-piece body of molded composite plastic material in which there are formed or mounted the various components and metal fittings.
  • the first sub-assembly, or delivery distributor comprises the three-way valve 4, a fitting 3 to be connected to the main heat exchanger 2, a fitting 5 for the connection to the radiator R, an outlet fitting 9 for the domestic water and two spigots or pipe fittings 22, 23 connecting the unit with said water/water heat exchanger 17 (of known type) formed by metal sheets stacked on each other to define alternating thin passagges through which flow the hot water and the water to be heated, respectively.
  • connections to the exchanger 17 are shown as conduits whereas in practice both sub-assemblies are built in such a manner that the illustrated connections are mere outlets or openings having a negligible length.
  • the three-way valve 4 can be actuated either by an electric motor 12 or by a diferential pressure flow valve of the diaphragm type (not shown) connected to a depression device by two tubes.
  • the motor 12 is mounted on a seat in the sub-assembly I, and secured by means 38, for example two screws or a slit ring, so as to be easily dismounted for servicing and replacing the components, if necessary.
  • the electric motor 12 connected to the stem of the three-way valve 4, accomplishes a rectilinear movement upon receiving a command or enabling signal S from a manostat device 14 in the domestic water circuit, as will be described later on.
  • actuating members 42 and 43 formed as flat bodies fixed to each other and axially urged by a return spring 44.
  • An opening 30, provided near the fitting 3, allows the insertion of a temperature probe, usually a thermistor (not shown).
  • a pressure difference manostat 15 that opens the microswitch 155 for disenabling the burner in case of lack of water in the heating plant and/or lack of pressure (pump blocking).
  • Such pressure difference manostat 15 comprises a chamber 150 connected to the fitting 7, that is divided into two parts by a diaphragm 151. One of the two parts communicates through the passage of the fitting 7 with the three-way valve, whereas the other part is connected to a point upwards the pump P through a passage 158, i.e. to a zone at a lower pressure.
  • a flat member or pan 152 abuts against the diaphragm 151, urged by a a spring 154 and provided with a spindle 153 protruding from the chamber 150 for acting over the microswitch 155.
  • water in the plant such water is pressurized by the pump P on the side of the valve 4, with the other side being in a depression condition, and the so generated pressure difference acts over the diaphragm 151 controlling the safety microswitch 155.
  • bypass valve 16 formed by a seat in which there are housed: a movable member 161 biased by a spring 162 that abuts against a spring stop 163 (see Fig. 12A).
  • the bypass valve 16 When the pressure difference between the delivery and return sides reaches a predetermined high value, for example due to large load losses in the radiators, the bypass valve 16 is opened and a part of the water recirculates through the bypass connection tube 10A provided for ensuring always the passage of a certain amount of water towards the main exchanger 2.
  • the unit further provides the two openings 22 and 23 fitted with sealing rings or O-rings 70, 71 for the connection to the water/water heat exchanger 17, for the inlet of the heating water and for the outlet of the domestic water, respectively.
  • the connection is accomplished through a stay or tie rod 73 drawing the parts near to each other and compressing the O-rings so as to realize a sealing thereof.
  • Fig. 11B illustrates with more details the second sub-assembly II, enclosed in a dashed rectangle in Fig. 11.
  • This sub-assembly comprises command and control means for the three-way valve 4.
  • such means comprises a pressure difference manostat 25 fitted in the sanitary tube and controlling the motor 12 on the sub-assembly I, however such means can have other different constructions, such as for example a pressure-actuated diaphragm valve.
  • the second sub-assembly II further comprises a depression device 14 and the pump P. As better illustrated hereinbelow with reference to Fig.
  • the construction of the sub-assembly II according to the invention comprises a one-piece or monolithic body 18 and a pump case or housing 19 adapted to contain the motor of the pump, both the body and the case being of a composite plastic materials, together with metal fittings 50, 60.
  • the components of the sub-assembly II perform the following tasks.
  • the tap RE for delivering hot water is opened and as long as the requested water flow rate is below a given value, such as for example 2 liters/minute, the water from the inlet fitting 8 and flowing through a short conduit 20 towards the plate heat exchanger 17, at first passes through a small hole 145 in the bored movable member 141 within the depression device 14.
  • the force of the spring 146 is overcome and the water flows also through the bored movable member 141.
  • manostat 25 connected to the device 14 by two conduits 142 and 144 are similar to those of the above illustrated device 15, and also this latter is completely opend at a predetermined value of the flow rate, for example 2 liters/minuute.
  • conduit 142 During the water flow, the water pressure of the waterworks is applied to conduit 142, while the pressure drop is applied to conduit 144 for obtaining a signal adapted to the working of the sanitary manostat 25.
  • the manostat 25 is omitted and the conduits 142, 144 are connected to said diaphragm valve.
  • the construction of the sub-assembly II comprises the one-piece or monolithic body 18 and a portion of case 19, both of composite plastic material, and metal members or fittings 50, 60 to be later illustrated with more details.
  • the fittings are realized as brass components and are pressing or forced into the corresponding seats or receptacles, so that in the plant installation the workman must not work on plastic materials.
  • the monolithic body 18 (see Fig. 8), is moulded of a composite plastic materials, and comprises the portions IIA and IIB that are connected to each other by a connecting portion IIC.
  • a housing recess 40 for the motor of the pump there is formed a housing recess 40 for the motor of the pump, an automatic venting duct 41 for the plant, a seat or receptacle 42 for a connection fitting (not shown) to the main heat exchanger 2, and a seat or receptacle 6A for the metal fitting 6 for the return of the heating water.
  • portion IIB there is formed a seat for the depression device 14 and the manostat 25 with two openings 44 and 45 for the depression device and the sanitary cold water fitting, respectively.
  • the connecting portion IIC there are formed two openings 32 and 33 (shown by dashed lines) for the connection to the water/water heat exchanger 17, that are substantially equivalent to the already described openings 22 and 23, and a hole 46 for the connecting tay (not shown) to the heat exchanger 17.
  • the case 19 of the pump P can be shaped in different ways, in accordance with the type of pump being mounted in the assembly, and a further intermediate portion of composite plastic material (not shown in the drawings) could be provided for adjusting pumps with a shorter length.
  • the openings and the seats or receptacles for receiving a threaded metal fitting are equipped with clutches or couplings (clearly shown in Fig. 9) comprising a slit in which an elastic fork is inserted that engages a groove realized in the metal component that is housed therein.
  • clutches or couplings (clearly shown in Fig. 9) comprising a slit in which an elastic fork is inserted that engages a groove realized in the metal component that is housed therein.
  • other known fastening means can be used, for example screws.
  • Fig. 9 illustrates the brass metal body 50 provided with conduits 56, 57 and 58 communicating with each other.
  • the body 50 comprises the proper threaded fitting 8 for the return of the heating water, and the portion of a clutch 51 with a groove 52 for engaging the metal fork.
  • the metal body 50 further comprises a fitting 58 (shown as not threaded in Fig. 9) for water drain, a mouthpiece 53 for a safety valve (64 in Fig. 11), and an opening 54 for the connection to a filling tap RI (see Fig. 11B).
  • a further opening, axially aligned with the opening 54 (and not visible in Fig. 9) is provided for the connection to an expansion tank 13 shown in Fig. 11.
  • an additional outlet 55 is provided for the connection with a thermostat.
  • the metal body 60 is substantially formed by a threaded fitting for the inlet of the domestic water, a portion of clutch 61 with a groove 62 for engaging the fork, and a opening 63 for the connection to a (possible) tap for water filling.
  • the valve or depression device 14 comprises the following axially aligned components: a plug 81, an O-ring 82, a metal network filter 83 and a bush 84. Between the filter 83 and the bush 84 there is interposed a flow regulator 85, for example set at 12 liters/minute. A spring, housed between the seat of the movable member and the movable member 85 supplies the return force.
  • the composite material forming the pieces 1, 2 and 6 is a thermoplastic polymeric material, for example of polyammide fibers, such as nylon filled with glass fibers or other materials, or a so called “technological" polymers such as the Ryton R .
  • the composite plastic material used in the assembly of the invention has a very good dimensional stability and a high resistance against chemical attacks, as well as a low mold shrinkage in order to obtain the required dimensional precision of the components.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Safety Valves (AREA)

Claims (12)

  1. Un ensemble de valve pour une installation combinée devant produire à la fois du chauffage et de l'eau chaude sanitaire, comprenant :
       un brûleur à gaz (1), un échangeur de chaleur principal gaz/eau (2), un échangeur eau/eau (17) susceptible d'être relié par une valve à trois voies (4) au circuit de l'eau de chauffage, au moins un radiateur (R) et une pompe (P) pour faire circuler l'eau de chauffage, ledit ensemble comprenant un premier et un deuxième sous-ensembles ou unités de valve (I, II), caractérisé en ce que lesdits deux sous-ensembles sont constitués d'une matière plastique composite, ledit deuxième sous-ensemble (2) incorporant ladite pompe (P).
  2. Un ensemble de valve selon la revendication 1, caractérisé en ce que le premier sous-ensemble (I) comprend une valve à trois voies (4), un raccord (3) et un raccord (5) pour la connexion de ladite valve à trois voies (4), respectivement, avec ledit échangeur de chaleur principal (2) et avec le radiateur (R), un raccord de sortie (9) pour l'eau domestique et deux raccords (22, 23) vers ledit échangeur eau/eau (17), et une valve de dérivation (16) montée sur ledit raccord (5) pour assurer la connexion au radiateur (R), ledit premier sous-ensemble (I) étant réalisé sous la forme d'un corps monobloc, monolithique en une matière plastique composite.
  3. Un ensemble de valve selon la revendication 1 ou la revendication 2, caractérisé en ce que ledit deuxième sous-ensemble (II) comprend : des moyens (25) pour actionner ladite valve à trois voies (4) du premier sous-ensemble (I), un dispositif à dépression (14) à différence de pression et relié auxdits moyens d'actionnement (25), ladite pompe (P), un raccord (6) pour la connexion au radiateur (R), un raccord (8) formé sur ledit dispositif à dépression (14) pour l'entrée de l'eau domestique, une conduite de purge automatique (41) de la pompe, et deux connexions (32, 33) vers ledit échangeur eau/eau (17), ledit deuxième sous-ensemble (II) étant constitué d'un corps monobloc (18) et d'un boítier (19) logeant le moteur entraínant la pompe, les deux étant réalisés en une matière plastique composite.
  4. Un ensemble de valve selon la revendication 3, caractérisé en ce que ledit premier sous-ensemble (1) comprend un moteur électrique (12) destiné à actionner ladite valve à trois voies (4), et en ce que lesdits moyens d'actionnement prévus dans ledit deuxième sous-ensemble (2) comprennent un manostat (25) contrôlant ledit moteur (12) par l'intermédiaire d'un signal électrique.
  5. Un ensemble de valve selon la revendication 3, caractérisé en ce que ledit premier sous-ensemble (I) comprend une valve à diaphragme pour actionner ladite valve à trois voies (4), et en ce que lesdits moyens d'actionnement prévus dans ledit deuxième sous-ensemble (II) comprennent deux conduits (142,144) sortant dudit dispositif à dépression (14) et connectés à ladite valve à diaphragme.
  6. Un ensemble de valve selon la revendication 3, caractérisé en ce que ledit premier sous-ensemble (1) comporte des sièges ou des réceptacles (3A, 5A, 9A) pour monter des raccords métalliques (3, 5, 9), et en ce que ledit deuxième sous-ensemble (II) comporte deux corps métalliques (50, 60) dans lesquels sont formés des raccords métalliques (6, 7, 8).
  7. Un ensemble de valve selon les revendications précédentes, caractérisé en ce que ledit corps monobloc (18) du deuxième sous-ensemble (II) comprend :
    une première partie (IIA) monobloc avec ladite pompe (P) et comporte une cavité (40) pour recevoir le moteur de la pompe, un conduit de purge automatique (41) pour l'installation, un siège ou réceptacle (42) pour le raccord vers l'échangeur de chaleur principal (2), et un siège ou réceptacle (6A) pour le raccord métallique (6), pour le retour de l'eau de chauffage;
    une deuxième partie (IIB) dans laquelle un siège est formé pour ledit dispositif à dépression et pressostatique (14), avec respectivement deux ouvertures (44) pour le dispositif à dépression et une ouverture (45) pour l'entrée de l'eau domestique froide ; et
    une partie de connexion (IIC) dans laquelle sont formées lesdites deux ouvertures de connexion (32, 33) vers l'échangeur de chaleur eau/eau (17), et un trou (46) pour une pièce d'appui de connexion avec l'échangeur de chaleur.
  8. Un ensemble de valve selon les revendications précédentes, caractérisé en ce que ledit matériau composite comporte un polymère thermoplastique, tel que du nylon dans lequel des fibres de verre sont noyées.
  9. Un ensemble de valve selon les revendications précédentes, caractérisé en ce que ledit matériau composite comprend un polymère technologique tel que le Ryton.
  10. Un ensemble de valve selon les revendications précédentes, caractérisé en ce que l'un (50) desdits corps métalliques est un élément en laiton à travers lequel s'étendent des conduites de communication (56, 57, 58) et comprenant un raccord métallique fileté (8) destiné au retour de l'eau de chauffage, le raccord (58) destiné à la purge de l'eau, une embouchure (53) destinée à une soupape de sécurité (64) et une ouverture de connexion (54) pour un éventuel robinet (RI) destiné au remplissage en eau.
  11. Un ensemble de valve selon la revendication 10, caractérisé en ce que ledit corps métallique (50) comprend en outre une ouverture de connexion vers un réservoir d'expansion (13) et à une sortie (55) destinée à la connexion à un thermostat.
  12. Un ensemble de valve selon les revendications précédentes, caractérisé en ce que l'autre (60) desdits corps métalliques et formé essentiellement par un raccord fileté pour l'entrée de l'eau domestique, et comprend une partie de griffe et une ouverture (63) pour recevoir le raccord vers un éventuel robinet (RI) pour le remplissage en eau.
EP96110213A 1996-03-22 1996-06-25 Ensemble de soupape avec pompe intégrée pour chaudière mixte chauffage / eau sanitaire Expired - Lifetime EP0797057B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960567 1996-03-22
IT96MI000567A IT1284431B1 (it) 1996-03-22 1996-03-22 Gruppo idraulico con pompa integrata per impianti misti di riscaldamento e acqua sanitaria

Publications (3)

Publication Number Publication Date
EP0797057A2 EP0797057A2 (fr) 1997-09-24
EP0797057A3 EP0797057A3 (fr) 1998-10-14
EP0797057B1 true EP0797057B1 (fr) 1999-12-15

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Family Applications (1)

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EP96110213A Expired - Lifetime EP0797057B1 (fr) 1996-03-22 1996-06-25 Ensemble de soupape avec pompe intégrée pour chaudière mixte chauffage / eau sanitaire

Country Status (4)

Country Link
EP (1) EP0797057B1 (fr)
DE (1) DE69605644T2 (fr)
ES (1) ES2142522T3 (fr)
IT (1) IT1284431B1 (fr)

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CN102042637A (zh) * 2010-09-07 2011-05-04 浙江恒翔实业发展有限公司 采暖系统用生活水和采暖水切换装置

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EP0981031A3 (fr) * 1998-08-18 2002-07-31 ALCO Corporation of Namdong Industrial Area 156BL/10LT Appareil pour circuler l'eau de chauffage et pour le chauffage instantané de l'eau sanitaire dans une chaudière mixte
IT1302663B1 (it) 1998-10-14 2000-09-29 Bugas S R L Gruppo idraulico per impianti misti di riscaldamento e acquasanitaria provvisti di serbatoio
EP1384960A1 (fr) * 1999-02-03 2004-01-28 IABER S.p.A. Chaudière
EP1026457A1 (fr) * 1999-02-03 2000-08-09 IABER S.p.A. Carter de pompe multifonctionnel
DE10007873C1 (de) * 2000-02-21 2001-06-28 Grundfos As Baueinheit für eine Kompaktheizungsanlage
FR2813950B1 (fr) * 2000-09-14 2002-11-15 Chaffoteaux Et Maury Vanne distributrice hydraulique pour systeme de production d'eau chaude de chauffage et d'eau chaude sanitaire
EP1418387B1 (fr) * 2002-11-08 2016-01-13 Grundfos A/S Installation de chauffage compacte avec deux circuits de chauffage
DE102004049512B4 (de) * 2004-10-11 2013-11-28 Bürkert Werke GmbH Modulares Gehäusesystem für fluidische Steuer- und Regelgeräte
ITMI20041982A1 (it) * 2004-10-19 2005-01-19 G V Stamperie S P A "gruppo caldaia per caldaie a gas a doppia funzione e caldaia con tale gruppo"
ITMI20060751A1 (it) * 2006-04-14 2007-10-15 Fugas S P A Gruppo idraulico di ritorno per caldaie murali
ITMI20060773A1 (it) * 2006-04-19 2007-10-20 Fugas S P A Circuito idraulico per il riscaldamento e la produzione di acqua calda sanitaria ottenuti da una sorgente si acqua calda centralizzata
ITMI20070370A1 (it) * 2007-02-27 2008-08-28 Fugas S P A Gruppo idraulico con doppio scambiatore secondario per inmpianti con caldaie a gas
ITPD20090018A1 (it) * 2009-01-29 2010-07-30 Italtecnica S R L Dispositivo di raccordo particolarmente per gruppi autoclave ad elettropompa
EP3012552B1 (fr) * 2014-10-21 2018-01-31 Grundfos Holding A/S Composant pour une installation de chauffage compacte
KR101639188B1 (ko) * 2014-11-19 2016-07-13 주식회사 경동나비엔 수배관 관로 일체형 체크밸브를 구비한 보일러
ITUA20164036A1 (it) * 2016-06-01 2017-12-01 O T M A S N C Di Spaggiari & C Gruppo idraulico per un impianto di produzione di acqua calda
WO2022250636A1 (fr) * 2021-05-24 2022-12-01 Serdar Plastik Sanayi Ve Ticaret A.Ş. Dispositif « hydroblock »

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IT230482Y1 (it) * 1993-11-10 1999-06-07 Beretta A Ing Spa Gruppo idraulico estremamente compatto per caldaie murali a gas
IT1273666B (it) * 1994-07-20 1997-07-09 Giuseppe Fugazza Gruppo idraulico perfezionato per impianti misti di riscaldamento e acqua sanitaria

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042637A (zh) * 2010-09-07 2011-05-04 浙江恒翔实业发展有限公司 采暖系统用生活水和采暖水切换装置
CN102042637B (zh) * 2010-09-07 2013-04-03 浙江恒翔实业发展有限公司 采暖系统用生活水和采暖水切换装置

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IT1284431B1 (it) 1998-05-21
EP0797057A3 (fr) 1998-10-14
ES2142522T3 (es) 2000-04-16
EP0797057A2 (fr) 1997-09-24
DE69605644T2 (de) 2000-05-31
ITMI960567A0 (fr) 1996-03-22
ITMI960567A1 (it) 1997-09-22
DE69605644D1 (de) 2000-01-20

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