EP1845314A1 - Hydraulic return group for wall boiler - Google Patents
Hydraulic return group for wall boiler Download PDFInfo
- Publication number
- EP1845314A1 EP1845314A1 EP07106133A EP07106133A EP1845314A1 EP 1845314 A1 EP1845314 A1 EP 1845314A1 EP 07106133 A EP07106133 A EP 07106133A EP 07106133 A EP07106133 A EP 07106133A EP 1845314 A1 EP1845314 A1 EP 1845314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- subgroup
- water
- return
- unit
- heating
- 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.)
- Withdrawn
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Classifications
-
- 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
- F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/48—Water heaters for central heating incorporating heaters for domestic water
- F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
Definitions
- the present invention relates to residential mixed systems adapted to supply both heating and sanitary water, i.e. systems in which the hot water from one or different supplies is used both for heating dwellings through radiator elements (heaters) and for producing sanitary warm water for several uses.
- the primary hot water can be supplied either by a local gas burner, or by a centralized plant or by a station of a district heating system.
- a hydraulic group of this kind comprises a delivery subgroup and a return subgroup connected to a water/water heat exchanger of the type comprising a plurality of plates brazed together.
- Fig. 1 of the above mentioned patent illustrates a hydraulic diagram of a group to which the present invention could be applied.
- the delivery subgroup is formed as a metal block, typically of brass, housing a three-way valve, a connection to the main heat exchanger, a connection to the radiator system, an outlet connection for the sanitary water, two connections to the water/water heat exchanger, as well as seats or recesses for a pressure switch and a bypass valve with associated outlet connections.
- the return subgroup is formed as a metal block, typically of brass, housing a water flow detector that actuates the three-way valve (in the above mentioned patent a pressure drop device, and more recently a flow transducer or meter), a connection to the radiator system, an inlet connection to the sanitary water, an outlet connection to the pump, and the other two connections to the water/water heat exchanger.
- the pump can be embedded in the second subgroup made of plastic material or anyhow secured to the second metal subgroup.
- any constructional improvement affecting only a part of the group might result in being incompatible with the remainder of the group, to the point of requiring the replacement of the whole group.
- the invention further relates to a hydraulic group for a system providing for both heating and sanitary water and equipped with a return subgroup of the above mentioned type.
- unit IIA is made of brass and is preferably a "light weight" unit, i.e. formed with a small amount of metal material
- unit or portion IIB is made of a composite material based on polyammide, i.e. comprising a polymeric base material and at least one filler.
- a preferred material is for instance the one known as PA 6.6 GF30s comprising Polyammyde PA 6.6 filled with a 30% of glass fibers (Glass Fibers GF30).
- Unit or portion IIB is more massive and is formed inside the pump body, or in other words the pump body PC is formed in such way as to incorporate the other group functions such as the three-way valve, the drain tap, the connection to the safety valve, etc. that will be illustrated later on.
- the metal material from which unit IIA is formed is preferably brass (UNI EN 12165 CW617N).
- the brass subgroup IIA is formed as a cylindrical body 11 housing a flow detector 12 of the sanitary water and providing at the opposite end for a connection 13 to the circuit of the sanitary water.
- the flow detector 12 can be either a transducer supplying an output electric signal representative of the flow/no-flow condition, or a device metering the water flow.
- transverse portions 16 and 18 for connecting the water-water heat exchanger to the subgroup, and a tilted portion 19 housing the tap 20 for filling the primary circuit, and also a connection 21 for the connection of the subgroup to unit IIB.
- Portion IIB is substantially made up by the pump body PC and incorporates a three-way routing valve 22 (integrated in the pump body PC), and in accordance with an advantageous embodiment of the invention, this valve extends vertically.
- a drain tap 24 for emptying the plant, a connection 25 (if required) to an external bypass pipe, a connection 26 to a safety valve and a connection 27 for connecting the portion IIB to the above illustrated brass group IIA.
- the advantage of a vertical construction of the routing three-way valve 22 is that of enabling the construction of the inner functional parts of the routing three-way valve as a single component assembled so as to be completely removable (like a sort of "cartridge"). This way the worn parts can be replaced without disassembling the pump or other parts of the plant, and moreover the standard connections are maintained for the actual linear actuators.
- the group according to the invention accomplishes the return subgroup functions partly in the light-weight brass portion or unit IIA (transducer and filling), and partly in the pump body, thus providing for a consistent reduction of the metal material (brass) while nevertheless maintaining all the functional features of a traditional return group.
- the metal (brass) is present in all those parts mostly subjected to water hammers (particularly in the sanitary circuit) where traditionally the composite materials (plastics) would not assure an absolute reliability. Also in this case the distance between the axes of the sanitary and primary return connections 13 and 23 is maintained (65 mms).
- the hydraulic circuit according to the invention is completely interchangeable with the existing ones and allows their advantageous replacement without modifying the parts made of metal plates of the existing boilers.
Abstract
The invention concerns a return subgroup for a system adapted to supply both heating and sanitary water, as well as a hydraulic group incorporating such subgroup. The return subgroup includes a metal unit (IIA) and a unit of a composite material (IIB) formed by the body (PC) of the system circulating pump, which incorporates the routing three-way valve (22). The metal unit (IIA) houses a flow detector (12) of the sanitary water for controlling the three-way valve (22), a connection (13) to the sanitary water circuit and two connections (16, 18) to the water-water heat exchanger (17).
Description
- The present invention relates to residential mixed systems adapted to supply both heating and sanitary water, i.e. systems in which the hot water from one or different supplies is used both for heating dwellings through radiator elements (heaters) and for producing sanitary warm water for several uses. The primary hot water can be supplied either by a local gas burner, or by a centralized plant or by a station of a district heating system.
- As disclosed in
Italian patent No. 1 254 266 EP 568122B1 - Fig. 1 of the above mentioned patent illustrates a hydraulic diagram of a group to which the present invention could be applied. As disclosed in patent
No. 1 254 266 - The return subgroup is formed as a metal block, typically of brass, housing a water flow detector that actuates the three-way valve (in the above mentioned patent a pressure drop device, and more recently a flow transducer or meter), a connection to the radiator system, an inlet connection to the sanitary water, an outlet connection to the pump, and the other two connections to the water/water heat exchanger. In some embodiments, the pump can be embedded in the second subgroup made of plastic material or anyhow secured to the second metal subgroup.
- In respect of the functions of the components and the operation of the group, reference is made to the description of the above mentioned patent.
- The construction with two subgroups disclosed in the above mentioned patent proved to be satisfactory and is still used, nevertheless it would be desirable to reduce the weight, and therefore the cost, of the metal material (brass) of which the subgroups are formed, without at the same time jeopardizing or limiting the functions that are typical of the traditional hydraulic circuits.
- It is further to be pointed out that any constructional improvement affecting only a part of the group, such as for example the return subgroup, might result in being incompatible with the remainder of the group, to the point of requiring the replacement of the whole group. This prevents from making improvements to groups that are not installed, but are in kept in stock for replacement and servicing purposes, although these groups would otherwise take advantage of constructional improvements. This situation further hinders a partial replacement with up-to-date improved components in already installed groups.
- It is an object of the present invention to realize a return subgroup of the above type providing for a consistent weight reduction of the metal material, and therefore a cost reduction, without impairment or limitations of the functions that are typical of the traditional hydraulic circuits.
It is a further object of the invention to realize a return subgroup with improved characteristics of compactness and low cost, while maintaining high levels of reliability. Another object of the invention is to retain the interchangeability of the hydraulic subgroup of the present invention with those already present in the market, whereby the replacement of these latter becomes economically advantageous and does not require modifications to other parts of the hydraulic system. - The invention further relates to a hydraulic group for a system providing for both heating and sanitary water and equipped with a return subgroup of the above mentioned type.
- According to the invention, these objects are achieved through a return subgroup for hydraulic groups as claimed in claim 1 and a hydraulic group as claimed in
claim 11. Further advantageous characteristics are recited in the dependent claims. - The invention will now be disclosed with reference to the attached drawings illustrating preferred but not limiting embodiments of the invention, in which:
- Fig. 1 is a front view of a return subgroup according to the invention connected to a heat exchanger which is only partially shown;
- Fig. 2 is a top view of the return subgroup according to the invention;
- Fig. 3 is a perspective side back view of the return subgroup according to the invention; and
- Fig. 4 is a back view of the return subgroup according to the invention.
- Throughout all the Figures the same numerical references have been used for indicating equal or functionally equivalent parts.
- With reference to the Figures, in which the return (sub)group according to the invention is shown as being connected to a water/
water heat exchanger 17 only partially represented, such return subgroup comprises two parts, respectively a portion or unit IIA and a portion or unit IIB. Unit IIA is made of brass and is preferably a "light weight" unit, i.e. formed with a small amount of metal material, whereas unit or portion IIB is made of a composite material based on polyammide, i.e. comprising a polymeric base material and at least one filler. A preferred material is for instance the one known as PA 6.6 GF30s comprising Polyammyde PA 6.6 filled with a 30% of glass fibers (Glass Fibers GF30). Unit or portion IIB is more massive and is formed inside the pump body, or in other words the pump body PC is formed in such way as to incorporate the other group functions such as the three-way valve, the drain tap, the connection to the safety valve, etc. that will be illustrated later on. The metal material from which unit IIA is formed is preferably brass (UNI EN 12165 CW617N). - More precisely, the brass subgroup IIA is formed as a
cylindrical body 11 housing aflow detector 12 of the sanitary water and providing at the opposite end for aconnection 13 to the circuit of the sanitary water. Theflow detector 12 can be either a transducer supplying an output electric signal representative of the flow/no-flow condition, or a device metering the water flow. - On the
cylindrical body 11 there are further formed twotransverse portions tilted portion 19 housing thetap 20 for filling the primary circuit, and also aconnection 21 for the connection of the subgroup to unit IIB. - Portion IIB is substantially made up by the pump body PC and incorporates a three-way routing valve 22 (integrated in the pump body PC), and in accordance with an advantageous embodiment of the invention, this valve extends vertically.
- In the lower part of the pump body PC there is formed a
return connection 23 for the primary circuit. - In the portion IIB there are further formed a
drain tap 24 for emptying the plant, a connection 25 (if required) to an external bypass pipe, aconnection 26 to a safety valve and aconnection 27 for connecting the portion IIB to the above illustrated brass group IIA. - The advantage of a vertical construction of the routing three-
way valve 22 is that of enabling the construction of the inner functional parts of the routing three-way valve as a single component assembled so as to be completely removable (like a sort of "cartridge"). This way the worn parts can be replaced without disassembling the pump or other parts of the plant, and moreover the standard connections are maintained for the actual linear actuators. - The group according to the invention accomplishes the return subgroup functions partly in the light-weight brass portion or unit IIA (transducer and filling), and partly in the pump body, thus providing for a consistent reduction of the metal material (brass) while nevertheless maintaining all the functional features of a traditional return group. Anyhow the metal (brass) is present in all those parts mostly subjected to water hammers (particularly in the sanitary circuit) where traditionally the composite materials (plastics) would not assure an absolute reliability. Also in this case the distance between the axes of the sanitary and
primary return connections - By maintaining the same spacing between the delivery and the return connections the hydraulic circuit according to the invention is completely interchangeable with the existing ones and allows their advantageous replacement without modifying the parts made of metal plates of the existing boilers.
- Although the invention has been illustrated with reference to preferred embodiments, it is susceptible in general of other applications and modifications that fall within its scope as will be evident to the skilled of the art.
Claims (13)
- A return subgroup for a system adapted to supply both heating and sanitary water, said system including:- a delivery subgroup and a return subgroup both connected to a water/water plate heat exchanger (17), said heat exchanger being connectable under control of a three-way valve (22) to the heating water circuit for receiving hot water from a supply, and- a pump for circulating said heating water,said return subgroup being characterized in that it comprises:a metal unit (IIA) that houses:- a flow detector (12) of the sanitary water for controlling said three-way valve (22),- a connection (13) to the sanitary water circuit,- two connections (16, 18) to said water-water heat exchanger (17), anda unit (IIB) of a composite material made up by the body (PC) of said pump and incorporating said three-way routing valve (22).
- A return subgroup as claimed in claim 1, characterized in that said composite material unit (IIB) further incorporates a connection (25) for an external bypass pipe.
- A return subgroup as claimed in claim 1 or 2, characterized in that said three-way valve (22) has a vertical extending construction.
- A return subgroup as claimed in the preceding claims, characterized in that said metal is brass.
- A return subgroup as claimed in the preceding claims, characterized in that said composite material is a polyammide filled with glass fibers.
- A return subgroup as claimed in the preceding claims, characterized in that said metal unit (IIA) additionally houses a tap for filling the primary circuit (20).
- A return subgroup as claimed in the preceding claims, characterized in that said composite material unit (IIB) further incorporates a tap (24) for emptying out the plant water.
- A return subgroup as claimed in the preceding claims, characterized in that said flow detector (12) in said metal unit (IIA) is a transducer adapted to supply an output electric signal.
- A return subgroup as claimed in the preceding claims, characterized in that said flow detector (12) in said metal unit (IIA) is a flow meter.
- A return subgroup as claimed in the preceding claims, characterized in that said unit (IIB) of a composite material incorporates a connection (26) for a safety valve.
- A hydraulic group for a system adapted to supply both heating and sanitary water and comprising a supply of hot water and a pump for circulating said heating water, said group comprising a delivery subgroup and a return subgroup both connected to a water/water plate heat exchanger (17) being connectable under control of a three-way valve (22) to the heating water circuit, said hydraulic group being characterized by comprising a return subgroup according to any of the preceding claims.
- A hydraulic group as claimed in claim 11, characterized in that said hot water supply comprises a main gas/water heat exchanger provided in the gas boiler.
- A hydraulic group as claimed in claim 11, characterized in that said hot water is supplied from a centralized plant or from a station of a district heating system.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20060751 ITMI20060751A1 (en) | 2006-04-14 | 2006-04-14 | HYDRAULIC RETURN GROUP FOR MURAL BOILERS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1845314A1 true EP1845314A1 (en) | 2007-10-17 |
Family
ID=38268803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07106133A Withdrawn EP1845314A1 (en) | 2006-04-14 | 2007-04-13 | Hydraulic return group for wall boiler |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1845314A1 (en) |
IT (1) | ITMI20060751A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106979612A (en) * | 2017-04-28 | 2017-07-25 | 广东万和热能科技有限公司 | Wall-hung boiler |
WO2022250636A1 (en) * | 2021-05-24 | 2022-12-01 | Serdar Plastik Sanayi Ve Ticaret A.Ş. | Hydroblock |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0568122A2 (en) * | 1992-03-12 | 1993-11-03 | FUGAS s.r.l. | A valve assembly for plants providing both heating and domestic hot water |
EP0652408A1 (en) * | 1993-11-10 | 1995-05-10 | ING. A. BERETTA S.p.A. | Very compact hydraulic assembly for wall gas-fired boilers |
EP0735332A2 (en) * | 1995-03-31 | 1996-10-02 | Daewoo Electronics Co., Ltd | Gas boiler |
EP0797057A2 (en) * | 1996-03-22 | 1997-09-24 | FUGAS s.r.l. | A valve assembly with integral pump for a plant providing both heating and sanitary hot water |
FR2755752A1 (en) * | 1996-11-08 | 1998-05-15 | Aries | HYDRAULIC MODULE FOR CENTRAL HEATING AND HOT WATER PRODUCTION INSTALLATIONS, AND BOILERS EQUIPPED WITH SUCH A MODULE |
EP0911590A2 (en) * | 1997-10-20 | 1999-04-28 | Valter Falavegna | Valve unit with built-in hydraulic distribution system, particularly for wall-mounted boilers for heating and producing sanitary hot water |
EP1130342A2 (en) * | 2000-02-21 | 2001-09-05 | Grundfos A/S | Assembly for a compact heating installation |
EP1408292A1 (en) * | 2002-10-07 | 2004-04-14 | Nefit Buderus B.V. | Heating device |
EP1418387A1 (en) * | 2002-11-08 | 2004-05-12 | Grundfos a/s | Compact heating system with two heating circuits |
EP1528330A1 (en) * | 2003-11-03 | 2005-05-04 | Grundfos A/S | Assembly for a compact heating installation |
-
2006
- 2006-04-14 IT ITMI20060751 patent/ITMI20060751A1/en unknown
-
2007
- 2007-04-13 EP EP07106133A patent/EP1845314A1/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0568122A2 (en) * | 1992-03-12 | 1993-11-03 | FUGAS s.r.l. | A valve assembly for plants providing both heating and domestic hot water |
EP0652408A1 (en) * | 1993-11-10 | 1995-05-10 | ING. A. BERETTA S.p.A. | Very compact hydraulic assembly for wall gas-fired boilers |
EP0735332A2 (en) * | 1995-03-31 | 1996-10-02 | Daewoo Electronics Co., Ltd | Gas boiler |
EP0797057A2 (en) * | 1996-03-22 | 1997-09-24 | FUGAS s.r.l. | A valve assembly with integral pump for a plant providing both heating and sanitary hot water |
FR2755752A1 (en) * | 1996-11-08 | 1998-05-15 | Aries | HYDRAULIC MODULE FOR CENTRAL HEATING AND HOT WATER PRODUCTION INSTALLATIONS, AND BOILERS EQUIPPED WITH SUCH A MODULE |
EP0911590A2 (en) * | 1997-10-20 | 1999-04-28 | Valter Falavegna | Valve unit with built-in hydraulic distribution system, particularly for wall-mounted boilers for heating and producing sanitary hot water |
EP1130342A2 (en) * | 2000-02-21 | 2001-09-05 | Grundfos A/S | Assembly for a compact heating installation |
EP1408292A1 (en) * | 2002-10-07 | 2004-04-14 | Nefit Buderus B.V. | Heating device |
EP1418387A1 (en) * | 2002-11-08 | 2004-05-12 | Grundfos a/s | Compact heating system with two heating circuits |
EP1528330A1 (en) * | 2003-11-03 | 2005-05-04 | Grundfos A/S | Assembly for a compact heating installation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106979612A (en) * | 2017-04-28 | 2017-07-25 | 广东万和热能科技有限公司 | Wall-hung boiler |
CN106979612B (en) * | 2017-04-28 | 2022-12-20 | 广东万和热能科技有限公司 | Wall-mounted stove |
WO2022250636A1 (en) * | 2021-05-24 | 2022-12-01 | Serdar Plastik Sanayi Ve Ticaret A.Ş. | Hydroblock |
Also Published As
Publication number | Publication date |
---|---|
ITMI20060751A1 (en) | 2007-10-15 |
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