EP2148149B1 - Hydraulic valve assembly for wall-mounted boilers - Google Patents
Hydraulic valve assembly for wall-mounted boilers Download PDFInfo
- Publication number
- EP2148149B1 EP2148149B1 EP09166063.9A EP09166063A EP2148149B1 EP 2148149 B1 EP2148149 B1 EP 2148149B1 EP 09166063 A EP09166063 A EP 09166063A EP 2148149 B1 EP2148149 B1 EP 2148149B1
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- EP
- European Patent Office
- Prior art keywords
- assembly
- sub
- sanitary
- pipe
- hydraulic valve
- Prior art date
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- 239000003643 water by type Substances 0.000 claims description 9
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Images
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
Definitions
- the present invention relates to a multifunction hydraulic assembly for combined wall-mounted boilers.
- Figure 1 designated as a whole by 10 is a combined autonomous system for heating premises and producing hot water.
- the system 10 is of a known type and consequently belongs to the prior art.
- the system 10 comprises a wall-mounted boiler 11, a hydraulic network 12, which connects the wall-mounted boiler 11 hydraulically with the water-using devices, and a hydraulic valve assembly 13, which has the purpose of adjusting the flowrates of water from/to the wall-mounted boiler 11.
- the system 10 is completed by at least one tap (RB) for delivery of sanitary hot water and by at least one heating element (ER) for heating premises both connected up to the hydraulic network 12.
- RB tap
- ER heating element
- the gas-fired wall-mounted boiler 11 comprises a casing 14 (normally made of sheet metal), housed inside which are a atmospheric gas burner 15, a main heat exchanger 16, and a flue (CHM) for evacuation of the fumes produced by combustion of the gas.
- the flue (CHM) is provided with a fan (VT).
- the inlet pipe 17 envisages a flowmeter 18 for intake of the sanitary cold water (FS), which is set in a coupling 19 for connection with a secondary heat exchanger 20; in addition, the heat exchanger 20 is advantageously, though not necessarily, of the plate type.
- FS sanitary cold water
- Departing from the heat exchanger 20 is a pipe 21 for outlet for the sanitary hot water (CS) sent to the tap (RB).
- the coupling 19 is provided with a deviation pipe 22, which envisages, in turn, a tap 23 for filling a primary circuit (C1), which, as will be seen, has the purpose of supplying the aforesaid heating element (ER) with hot water.
- a deviation pipe 22 envisages, in turn, a tap 23 for filling a primary circuit (C1), which, as will be seen, has the purpose of supplying the aforesaid heating element (ER) with hot water.
- the hydraulic valve assembly 13 further comprises a three-way valve 24 driven by a motor 25 and a pump 26 for recirculation into the main circuit (C1).
- the three-way valve 24 is used for activating a secondary circuit (C2) (for the sanitary water), which comprises the secondary heat exchanger 20.
- Said secondary circuit (C2) is activated in the presence of a request for sanitary hot water by a user.
- a pressure switch 27A of the primary circuit (C1) Installed alongside the pump 26 is a pressure switch 27A of the primary circuit (C1); the pressure switch 27A guarantees the minimum operating pressure of the wall-mounted boiler 11.
- a safety valve 27B of the primary circuit (C1) Located in the vicinity of the pump 26 an also a safety valve 27B of the primary circuit (C1), a degassing air valve (DG) of the central body of the pump 26, and a pipe tap for a manometer (MN).
- DG degassing air valve
- MN manometer
- the hydraulic valve assembly 13 illustrated in Figure 1 is not compact, and the elements that make it up are arranged in a non-rational way and in such a way that installation by specialized operators is not intuitive and immediate.
- the hydraulic valve assembly 13 shown in Figure 1 envisages the use of a plurality of connection elements between the various components, all this at the expense of compactness, reliability and cost of the hydraulic valve assembly 13 itself.
- EP-A1-1 418 387 describes a hydraulic valve assembly for wall-mounted boilers containing all the features of the preamble portion of claim 1.
- the main aim of the present invention is to provide a hydraulic valve assembly for wall-mounted boilers that is extremely compact and the constitutive elements of which are arranged in a rational way.
- FIG. 2 Shown in Figure 2 is a system 10* provided with a newly devised hydraulic valve assembly 13*.
- the hydraulic valve assembly 13* further comprises a shut-off tap (IR) set in the by-pass pipe 34.
- IR shut-off tap
- the pump 26 has been set centrally with respect to the secondary heat exchanger 20.
- the three-way valve 24 and the corresponding motor 25 are located on a first side (PP) (in this case on the right of the pump 26) with respect to the secondary heat exchanger 20 and to the pump 26.
- PP first side
- a second side (opposite to the first side (PP) with respect to the secondary heat exchanger 20 and to the pump 26) are the inlet pipe 17 for the sanitary cold water (FS) and the pipe 21 for outlet for the sanitary hot water (CS) to the tap (RB).
- the inlets and the outlets of the heating water (FR), (CR) and of the sanitary water (FS), (CS), are divided, respectively, into two distinct groups that do not cross over one another, and are not intertwined.
- the sanitary hot water (CS) In order for the sanitary hot water (CS) to be on the left with respect to the sanitary cold water (FS), the sanitary water coming from a point (P1) (where the coupling 19 ends) flows into the heat exchanger 20 towards a point (P2), starting from which is the pipe 21 for supply of the tap (RB). In particular, the sanitary water flows towards a point (P3) that is located on the same side as the point (P1).
- a second vertical portion 21B of the pipe 21 comes to be located to the left of the inlet pipe 17 for the sanitary cold water (FS), thus respecting the conventions adopted in the sector of hydraulic systems, which require the pipe for the sanitary hot water (possibly equipped with a tap) to be to the left of the pipe for delivery of the sanitary cold water.
- FS sanitary cold water
- hydraulic valve assembly 13* envisages:
- the three sub-assemblies (STG1), (STG2), (STG3) comprise fast-coupling hydraulic means for connection to one another and to the rest of the hydraulic network.
- the sub-assemblies (STG2), (STG3) envisage fast-coupling mechanical means for connection to the secondary heat exchanger 20 (see hereinafter).
- the three sub-assemblies (STG1), (STG2), (STG3) are made of composite material, they can each be formed in a single enbloc assembly, i.e., with a single moulding operation.
- all three sub-assemblies (STG1), (STG2), (STG3) can be produced together in a single enbloc assembly, i.e., with a single moulding operation.
- the secondary heat exchanger 20 represents a plate for assemblage of the three sub-assemblies (STG1), (STG2), (STG3).
- the three sub-assemblies (STG1), (STG2), (STG3) are fixed to the secondary heat exchanger 20 by means of just two screws (SHR1) and (SHR2).
- Each screw (SHR1), (SHR2) is first inserted into a corresponding hole (HL1), (HL2) made, respectively, in the second, lateral, sub-assembly (STH2) and in the third, lateral, sub-assembly (STG3) ( Figure 6 ).
- each screw (SHR1), (SHR2) is screwed in a respective threaded seat (SD1), (SD2), which is located on the secondary heat exchanger 20 ( Figure 5 ).
- the two lateral hydraulic sub-assemblies (STG2) and (STG3) each envisage a respective pair of headers (CLT1), (CLT2), (CLT3), (CLT4), which are designed to be connected to similar headers (not shown in Figure 6 ) present on the secondary heat exchanger 20.
- the aforesaid device 40 for crossing of the sanitary waters at inlet to and outlet from the secondary heat exchanger 20.
- the crossing device 40 from the thermal standpoint, is "zero balance" in the sense that the amount of heat yielded by the sanitary hot water is substantially equal to the amount of heat received by the same sanitary cold water at inlet. In addition, in the device 40 there is no mixing between the sanitary cold water and the sanitary hot water.
- One of the advantages of the hydraulic valve assembly 13* forming the subject of the present invention consists in having defined a new arrangement of the system connections on the bottom closing plate of the casing 14 of the boiler 11 in order to compact further the overall dimensions of the hydraulic valve assembly 13* and consequently reduce the total number of components, with a consequent marked reduction in production costs.
- interventions have been made, delimiting a space surrounding the secondary plate heat exchanger and positioning all the components for operation and control in a compact way.
- the compacting has led to a superposition with crossing of the connections for the sanitary-water circuit of the plate heat exchanger between the inlet for the sanitary cold water and the outlet for the sanitary hot water.
- composite material is meant a thermoplastic material, also referred to as “technopolymer”, which guarantees a good resistance to high operating temperatures, allied to a low permeability of water absorption (hydrolysis).
- the volute (VLT) of the pump 26, with corresponding intake header (CLTA) and delivery header (CLTM), a supplementary attachment (ATT) of the three-way valve 24 (useful in the case where it is desired to displace the three-way valve), a tap (PRS) for the manometer (MN) (not shown in Figure 7 ) are integrated in the first, central, sub-assembly (STG1).
- STG1 the two lateral sub-assemblies
- STG3 grip between them the first sub-assembly (STG1) comprising the volute (VLT) of the pump 26 and the corresponding elements seen previously connected thereto.
- the hydraulic assembly 13* also envisages a device 40 for crossing of the sanitary waters at inlet to and outlet from the heat exchanger 20.
- first horizontal portion 21A of the pipe 21 for outlet of the sanitary hot water Housed in the first pipe (CND1) is a first horizontal portion 21A of the pipe 21 for outlet of the sanitary hot water.
- the first pipe (CND1) and the horizontal portion 21A are coaxial.
- the horizontal portion 21A has a diameter smaller than that of the first pipe (CND1).
- Obtained by plastic deformation on the first portion 21A are two flanges (FLG1) and (FLG2) shaped like an annulus, equipped with respective O-rings.
- the sanitary hot water (CS) flows in the horizontal portion 21A and heats the sanitary cold water (FS) that enters the inlet pipe 17 and flows around the horizontal portion 21A itself before entering the secondary heat exchanger 20.
- Crossing between the coupling 19 and the pipe (CND1) defines the crossing device 40.
- the second, top, pipe (CND2) traverses, in use, the volute (VLT) of the pump 26 and has the purpose of rendering the volute (VLT) itself fixed with respect to the body of the secondary heat exchanger 20.
- the second, top, pipe (CND2) can be broken down into a number of pieces that can be connected to one another, at least one of which is inserted in the volute (VLT) itself.
- the hydraulic assembly 13* is also provided with a delivery pipe 50 for delivery to a micro-accumulation tank (MCR) ( Figure 3 ) and a return pipe 60 for return of the hot water contained in the micro-accumulation tank (MCR) to the primary circuit (C1).
- MCR micro-accumulation tank
- C1 primary circuit
- Said two interruptions (INT1), (INT2) are provided at the moment of production of the second sub-assembly (STG2).
- the micro-accumulation tank is a 4-litre or 5-litre tank, kept pre-heated by an electrical resistor (RE) ( Figure 3 ), which enables the instantaneous boiler 11 to reduce drastically the time for waiting for the production of hot water at 50°C when said boiler 11 starts cold. It basically functions as thermal flywheel in the initial step of intake of the sanitary hot water.
- the pump 26 goes into operation and recalls hot water at 70-80°C (from the pipe 60) present in the micro-accumulation tank (MCR), said hot water being sent to the primary heat exchanger 16 through the pipe 29 so as to bring the hot water of the primary circuit (C1) rapidly into steady-state conditions and, evidently indirectly, heat also up the sanitary water fast by means of the secondary heat exchanger 20.
- the delivery pipe 50 and the return pipe 60 of the micro-accumulation tank (MCR) are provided, respectively, with an attachment (IAF) for the cold water and an attachment (UAC) for hot water for immediate needs.
- a peculiarity of the present invention lies in that the two attachments (IAF) and (UAC) are integrated in the second sub-assembly (STG2), hence enabling elimination of inconvenient coupling pipes used in known existing embodiments.
- Each device 40 and 40* for crossing of the water entering/leaving the secondary heat exchanger 20 enables the connections of the heat exchanger to be rendered reversible, using at will, on the right or on the left, the coupling headers.
- FIGS 9 , 10 , and 11 show a particular arrangement, which envisages the use of a header (CLT), integrated in which are two water-crossing devices 40, 40*.
- CLT header
- the two water-crossing devices 40, 40* are both on the same side, even though it is possible to provide headers (not shown), in which the two crossing devices 40, 40* are set at the vertices of a diagonal of the heat exchanger 20.
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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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
- The present invention relates to a multifunction hydraulic assembly for combined wall-mounted boilers.
- As is known, hydraulic assemblies for combined wall-mounted boilers developed in the last few years have integrated, within increasingly compact overall dimensions, all the hydraulic functions of the boiler.
- In this perspective, the secondary heat exchanger with braze-welded plates for the production of sanitary hot water has asserted itself on the market, totally replacing the barrel heat exchanger thanks to its characteristics of smaller overall dimensions and lower production cost.
- The continuous research aimed at knocking down production costs of wall-mounted boilers (configuring them increasingly as electrical household appliances for use in apartments) has introduced the use of composite materials (technopolymers) as a replacement for the parts made of brass that were widely used previously.
- However, the arrangements of the various components in hydraulic assemblies currently on the market present certain drawbacks.
- In particular, the current configurations adopted in hydraulic assemblies present arrangements of the functional elements that are non-rational, and hence do not enable a significant reduction of the overall dimensions with a consequent reduction of costs.
- To provide a framework of the problem, it has appeared useful to show in
Figure 1 a system of a traditional type that uses a hydraulic valve assembly of a known type. - In
Figure 1 , designated as a whole by 10 is a combined autonomous system for heating premises and producing hot water. - The
system 10 is of a known type and consequently belongs to the prior art. - The
system 10 comprises a wall-mountedboiler 11, ahydraulic network 12, which connects the wall-mountedboiler 11 hydraulically with the water-using devices, and ahydraulic valve assembly 13, which has the purpose of adjusting the flowrates of water from/to the wall-mountedboiler 11. - The
system 10 is completed by at least one tap (RB) for delivery of sanitary hot water and by at least one heating element (ER) for heating premises both connected up to thehydraulic network 12. - As shown once again in
Figure 1 , the gas-fired wall-mountedboiler 11 comprises a casing 14 (normally made of sheet metal), housed inside which are aatmospheric gas burner 15, amain heat exchanger 16, and a flue (CHM) for evacuation of the fumes produced by combustion of the gas. The flue (CHM) is provided with a fan (VT). - The
hydraulic valve assembly 13 comprises, in turn, aninlet pipe 17 for the sanitary cold water (FS) coming from a water mains supply (not shown). - The
inlet pipe 17 envisages aflowmeter 18 for intake of the sanitary cold water (FS), which is set in acoupling 19 for connection with asecondary heat exchanger 20; in addition, theheat exchanger 20 is advantageously, though not necessarily, of the plate type. - Departing from the
heat exchanger 20 is apipe 21 for outlet for the sanitary hot water (CS) sent to the tap (RB). - The
coupling 19 is provided with adeviation pipe 22, which envisages, in turn, atap 23 for filling a primary circuit (C1), which, as will be seen, has the purpose of supplying the aforesaid heating element (ER) with hot water. - As emerges from
Figure 1 , whereas the water circulating in themain heat exchanger 16 is heated directly by the heat produced by theatmospheric gas burner 15, in the secondary heat exchanger 20 a heat exchange occurs between the hot water coming from thefirst heat exchanger 16 and the sanitary cold water (FS) coming from the water mains and in particular from thecoupling 19. - In a traditional way, the
hydraulic valve assembly 13 further comprises a three-way valve 24 driven by amotor 25 and apump 26 for recirculation into the main circuit (C1). - As is known, the three-
way valve 24 is used for activating a secondary circuit (C2) (for the sanitary water), which comprises thesecondary heat exchanger 20. Said secondary circuit (C2) is activated in the presence of a request for sanitary hot water by a user. - Installed alongside the
pump 26 is apressure switch 27A of the primary circuit (C1); thepressure switch 27A guarantees the minimum operating pressure of the wall-mountedboiler 11. Located in the vicinity of thepump 26 an also asafety valve 27B of the primary circuit (C1), a degassing air valve (DG) of the central body of thepump 26, and a pipe tap for a manometer (MN). - It is possible to break down the primary circuit (C1) into the following pipes:
- return
pipe 28 for return of the cold water for heating (FR) from the heating element (ER); -
delivery pipe 29 for delivery of the cold water for heating (FR) to themain heat exchanger 15; - return
pipe 30 for return of the hot water for heating (CR) from themain heat exchanger 16; -
delivery pipe 31 of the heating system for delivery of the hot water for heating (CR) to the heating element (ER); -
delivery pipe 32 for delivery of the hot water for heating (CR) to thesecondary heat exchanger 20; -
return pipe 33 for return of the hot water for heating (CR) from thesecondary heat exchanger 20 to thedelivery pipe 29 for delivery to themain heat exchanger 16; it is evident that in thereturn pipe 33 the hot water for heating (CR) has a temperature lower than that of the hot water for heating (CR) in thedelivery pipe 32; in addition, thereturn pipe 33 is provided with a tap (RS) for discharge of the primary circuit for supply of theboiler 11; - by-
pass pipe 34 of thereturn pipe 28, of thedelivery pipe 31, and of the heating element (ER); said by-pass pipe 34 is used in the case where the slam-shut valves (not illustrated) present in thepipes pass pipe 34 is provided with a corresponding pre-calibrated by-pass valve 35 and apipe 36 for connection with anexpansion vessel 37; the presence of said by-pass pipe 34 prevents onset of undesirable overheating of themain heat exchanger 16 during any possible block in circulation of the water. - However, the
hydraulic valve assembly 13 illustrated inFigure 1 is not compact, and the elements that make it up are arranged in a non-rational way and in such a way that installation by specialized operators is not intuitive and immediate. In addition, thehydraulic valve assembly 13 shown inFigure 1 envisages the use of a plurality of connection elements between the various components, all this at the expense of compactness, reliability and cost of thehydraulic valve assembly 13 itself. -
EP-A1-1 418 387 describes a hydraulic valve assembly for wall-mounted boilers containing all the features of the preamble portion of claim 1. - Consequently, the main aim of the present invention is to provide a hydraulic valve assembly for wall-mounted boilers that is extremely compact and the constitutive elements of which are arranged in a rational way.
- Non-limiting embodiments of the present invention will now be described with reference to the annexed drawings, it being pointed out that, given the particular complexity of the drawings and the large number of items, not all the elements have been numbered. In the drawings:
-
Figure 2 represents an overall scheme of a first embodiment of a combined system for heating and production of hot water according to the present invention; -
Figure 3 represents an overall scheme of a second embodiment of a combined system for heating and production of hot water according to the present invention; -
Figure 4 represents a three-dimensional perspective view of a hydraulic valve assembly used in the first embodiment of the combined system shown inFigure 2 ; -
Figure 5 shows an exploded view of the hydraulic valve assembly ofFigure 4 ; -
Figure 6 represents a first three-dimensional perspective view of the hydraulic valve ofFigure 4 without the heat exchanger; -
Figure 7 shows a second three-dimensional perspective view of the hydraulic valve assembly ofFigure 4 without the heat exchanger; -
Figure 8 represents a longitudinal cross section of the hydraulic valve assembly ofFigure 7 ; -
Figure 9 is a schematic illustration of a hydraulic scheme corresponding to crossed connections used both for the primary circuit for heating premises and for the secondary circuit for the production of hot water; -
Figure 10 is an exploded view comprising a plate heat exchanger associated to which is a header that implements the hydraulic scheme ofFigure 9 ; and -
Figure 11 shows an assembly resulting from the assemblage of the plate heat exchanger and of the header illustrated inFigure 10 . - Shown in
Figure 2 is asystem 10* provided with a newly devisedhydraulic valve assembly 13*. - In the
system 10* and in particular in thehydraulic valve assembly 13* ofFigure 2 the same reference numbers have been used to designate the same elements illustrated in thesystem 10 shown inFigure 1 and belonging to the prior art. - The
hydraulic valve assembly 13* further comprises a shut-off tap (IR) set in the by-pass pipe 34. - As shown in
Figure 2 , in thehydraulic valve assembly 13* forming the subject of the present invention, thepump 26 has been set centrally with respect to thesecondary heat exchanger 20. - The three-
way valve 24 and thecorresponding motor 25 are located on a first side (PP) (in this case on the right of the pump 26) with respect to thesecondary heat exchanger 20 and to thepump 26. - In addition, once again located on the first side (PP) is the
delivery pipe 31 of the heating system of the hot water for heating (CR), whilst positioned aligned to thepump 26 itself is thereturn pipe 28 of the primary circuit (C1). - Located on a second side (SP) (opposite to the first side (PP) with respect to the
secondary heat exchanger 20 and to the pump 26) are theinlet pipe 17 for the sanitary cold water (FS) and thepipe 21 for outlet for the sanitary hot water (CS) to the tap (RB). - As may be noted from
Figure 2 , the inlets and the outlets of the heating water (FR), (CR) and of the sanitary water (FS), (CS), are divided, respectively, into two distinct groups that do not cross over one another, and are not intertwined. - In order for the sanitary hot water (CS) to be on the left with respect to the sanitary cold water (FS), the sanitary water coming from a point (P1) (where the
coupling 19 ends) flows into theheat exchanger 20 towards a point (P2), starting from which is thepipe 21 for supply of the tap (RB). In particular, the sanitary water flows towards a point (P3) that is located on the same side as the point (P1). - In this way, a second
vertical portion 21B of thepipe 21 comes to be located to the left of theinlet pipe 17 for the sanitary cold water (FS), thus respecting the conventions adopted in the sector of hydraulic systems, which require the pipe for the sanitary hot water (possibly equipped with a tap) to be to the left of the pipe for delivery of the sanitary cold water. - Using a different terminology, we can say that the
hydraulic valve assembly 13* envisages: - a first, central, sub-assembly (STG1) comprising, in turn, the pump (26), at least one portion of the pipe (28), and at least one portion of the pipe (29);
- a second, lateral, sub-assembly (STG2), set on a first side with respect to the first sub-assembly (STG1), comprising, in turn, an
inlet 19 for sanitary cold water, anoutlet 21 for sanitary hot water, areturn pipe 33 for return of the hot water for heating (CR) from thesecondary heat exchanger 20, and a device (40) for crossing of the sanitary waters (see hereinafter); and - a third sub-assembly (STG3), set on a second side with respect to the first sub-assembly (STG1), comprising the three-way valve (24) with the corresponding motor (25), at least one portion of the outlet pipe (21A) for the sanitary hot water (CS), the delivery pipe (32) for delivery of the hot water for heating (CR) to the secondary heat exchanger (20), at least one portion of the pipe (30), and at least one portion of the pipe (31).
- The three sub-assemblies (STG1), (STG2), (STG3) comprise fast-coupling hydraulic means for connection to one another and to the rest of the hydraulic network. In addition, the sub-assemblies (STG2), (STG3) envisage fast-coupling mechanical means for connection to the secondary heat exchanger 20 (see hereinafter).
- Since the three sub-assemblies (STG1), (STG2), (STG3) are made of composite material, they can each be formed in a single enbloc assembly, i.e., with a single moulding operation.
- According to a further arrangement, all three sub-assemblies (STG1), (STG2), (STG3) can be produced together in a single enbloc assembly, i.e., with a single moulding operation.
- In addition to what has been mentioned previously, it may be stated that the
secondary heat exchanger 20 represents a plate for assemblage of the three sub-assemblies (STG1), (STG2), (STG3). - In effect, as is shown in greater detail in
Figures 4 ,5 , and6 , the three sub-assemblies (STG1), (STG2), (STG3) are fixed to thesecondary heat exchanger 20 by means of just two screws (SHR1) and (SHR2). Each screw (SHR1), (SHR2) is first inserted into a corresponding hole (HL1), (HL2) made, respectively, in the second, lateral, sub-assembly (STH2) and in the third, lateral, sub-assembly (STG3) (Figure 6 ). Finally, each screw (SHR1), (SHR2) is screwed in a respective threaded seat (SD1), (SD2), which is located on the secondary heat exchanger 20 (Figure 5 ). - As shown in greater detail in
Figure 6 , the two lateral hydraulic sub-assemblies (STG2) and (STG3) each envisage a respective pair of headers (CLT1), (CLT2), (CLT3), (CLT4), which are designed to be connected to similar headers (not shown inFigure 6 ) present on thesecondary heat exchanger 20. - Moreover provided in the
hydraulic valve assembly 13* is theaforesaid device 40 for crossing of the sanitary waters at inlet to and outlet from thesecondary heat exchanger 20. - In this connection, it should be noted that the crossing
device 40, from the thermal standpoint, is "zero balance" in the sense that the amount of heat yielded by the sanitary hot water is substantially equal to the amount of heat received by the same sanitary cold water at inlet. In addition, in thedevice 40 there is no mixing between the sanitary cold water and the sanitary hot water. - One of the advantages of the
hydraulic valve assembly 13* forming the subject of the present invention consists in having defined a new arrangement of the system connections on the bottom closing plate of thecasing 14 of theboiler 11 in order to compact further the overall dimensions of thehydraulic valve assembly 13* and consequently reduce the total number of components, with a consequent marked reduction in production costs. - To do this, in the present invention interventions have been made, delimiting a space surrounding the secondary plate heat exchanger and positioning all the components for operation and control in a compact way.
- The compacting has led to a superposition with crossing of the connections for the sanitary-water circuit of the plate heat exchanger between the inlet for the sanitary cold water and the outlet for the sanitary hot water.
- Interestingly, this compacting is moreover suited to an enbloc construction of the main assemblies obtained in a single body of composite material, where by "composite material" is meant a thermoplastic material, also referred to as "technopolymer", which guarantees a good resistance to high operating temperatures, allied to a low permeability of water absorption (hydrolysis).
- Sticking, instead, to the design choice that envisages three sub-assemblies (STG1), (STG2), (STG3), it is possible to envisage the construction of the
hydraulic valve assembly 13* in two "specular" configurations with the same dimensions and both having as central assembly the first sub-assembly (STG1). - Hence it is possible to envisage two "specular" configurations:
- (1) a first configuration with the second sub-assembly (STG2) to the left of the first, central, sub-assembly (STG1), whilst the third sub-assembly (STG3) is positioned to the right of the first, central, sub-assembly (STG1);
- (2) a second configuration with the second sub-assembly (STG2) to the right of the first, central, sub-assembly (STG1), whilst the third sub-assembly (STG3) is positioned to the left of the first, central, sub-assembly (STG1).
- In addition, as shown in particular in
Figure 7 , the volute (VLT) of thepump 26, with corresponding intake header (CLTA) and delivery header (CLTM), a supplementary attachment (ATT) of the three-way valve 24 (useful in the case where it is desired to displace the three-way valve), a tap (PRS) for the manometer (MN) (not shown inFigure 7 ) are integrated in the first, central, sub-assembly (STG1). InFigure 6 , it has been shown how the two lateral sub-assemblies (STG2), (STG3) grip between them the first sub-assembly (STG1) comprising the volute (VLT) of thepump 26 and the corresponding elements seen previously connected thereto. - As mentioned previously and as is shown in greater detail in
Figure 8 , thehydraulic assembly 13* also envisages adevice 40 for crossing of the sanitary waters at inlet to and outlet from theheat exchanger 20. - Once again in
Figure 8 it may be seen that the two sub-assemblies (STG2) and (STG3) are hydraulically connected to one another by a first, bottom, pipe (CND1) and, via the first sub-assembly (STG1), by a second, top, pipe (CND2). - Housed in the first pipe (CND1) is a first
horizontal portion 21A of thepipe 21 for outlet of the sanitary hot water. The first pipe (CND1) and thehorizontal portion 21A are coaxial. In addition, thehorizontal portion 21A has a diameter smaller than that of the first pipe (CND1). Obtained by plastic deformation on thefirst portion 21A are two flanges (FLG1) and (FLG2) shaped like an annulus, equipped with respective O-rings. The sanitary hot water (CS) flows in thehorizontal portion 21A and heats the sanitary cold water (FS) that enters theinlet pipe 17 and flows around thehorizontal portion 21A itself before entering thesecondary heat exchanger 20. - Crossing between the
coupling 19 and the pipe (CND1) defines the crossingdevice 40. - As shown once again in
Figure 8 the second, top, pipe (CND2) traverses, in use, the volute (VLT) of thepump 26 and has the purpose of rendering the volute (VLT) itself fixed with respect to the body of thesecondary heat exchanger 20. For this purpose, the second, top, pipe (CND2) can be broken down into a number of pieces that can be connected to one another, at least one of which is inserted in the volute (VLT) itself. - The
hydraulic assembly 13* is also provided with adelivery pipe 50 for delivery to a micro-accumulation tank (MCR) (Figure 3 ) and areturn pipe 60 for return of the hot water contained in the micro-accumulation tank (MCR) to the primary circuit (C1). - In the embodiment illustrated in
Figure 2 , given that they do not envisage any micro-accumulation tank, thepipes - Said two interruptions (INT1), (INT2) are provided at the moment of production of the second sub-assembly (STG2).
- Instead, in the model with micro-accumulation tank (MCR) illustrated in
Figure 3 , a plug (TPT) is provided in thepipe 36, which disconnects the cold water entering the micro-accumulation tank (MCR) from the hot water that flows out. - As is known, the micro-accumulation tank (MCR) is a 4-litre or 5-litre tank, kept pre-heated by an electrical resistor (RE) (
Figure 3 ), which enables theinstantaneous boiler 11 to reduce drastically the time for waiting for the production of hot water at 50°C when saidboiler 11 starts cold. It basically functions as thermal flywheel in the initial step of intake of the sanitary hot water. - In fact, when a user opens the tap (RB), the
pump 26 goes into operation and recalls hot water at 70-80°C (from the pipe 60) present in the micro-accumulation tank (MCR), said hot water being sent to theprimary heat exchanger 16 through thepipe 29 so as to bring the hot water of the primary circuit (C1) rapidly into steady-state conditions and, evidently indirectly, heat also up the sanitary water fast by means of thesecondary heat exchanger 20. - In addition, the
delivery pipe 50 and thereturn pipe 60 of the micro-accumulation tank (MCR) are provided, respectively, with an attachment (IAF) for the cold water and an attachment (UAC) for hot water for immediate needs. - A peculiarity of the present invention lies in that the two attachments (IAF) and (UAC) are integrated in the second sub-assembly (STG2), hence enabling elimination of inconvenient coupling pipes used in known existing embodiments.
- The same solution adopted for the sanitary water can be used for the heating water as shown in
Figures 9 ,10 , and11 . - In this case, it is possible to conceive a
device 40* for crossing of the delivery and return waters of the primary circuit (C1), which enter and exit from thesecondary heat exchanger 20. - Each
device secondary heat exchanger 20 enables the connections of the heat exchanger to be rendered reversible, using at will, on the right or on the left, the coupling headers. -
Figures 9 ,10 , and11 show a particular arrangement, which envisages the use of a header (CLT), integrated in which are two water-crossingdevices - In particular, in the embodiment illustrated in
Figures 9 ,10 , and11 , the two water-crossingdevices crossing devices heat exchanger 20. - The main advantage of the hydraulic valve assembly forming the subject of the present invention consists in providing rational arrangements of the functional elements, with a significant reduction of the overall dimensions and a consequent significant cut in production costs.
Claims (12)
- A hydraulic valve assembly (13*) for wall-mounted boilers (11) ;
the hydraulic valve assembly (13*) comprising:- a primary circuit (C1) for distribution of heating water in premises; said primary circuit (C1) being provided with pumping means (26);- a secondary circuit (C2) for distribution of sanitary water; said secondary circuit (C2) comprising a secondary heat exchanger (20) for heating the sanitary water; and- a three-way valve (24) controlled by actuation means (25); hydraulic valve assembly (13*) wherein said secondary heat exchanger (20) represents an plate heat exchanger, mounted on which, by means of fast-coupling mechanical means ((SHR1), (SHR2)) are:- a first, central, sub-assembly (STG1) comprising at least one portion of said means (26) for pumping the water into the primary circuit (C1) for distribution of heating water in premises;- a second, lateral, sub-assembly (STG2) comprising at least some elements belonging to said secondary circuit (C2) for distribution of sanitary water; and- a third, lateral, sub-assembly (STG3) comprising at least some elements belonging to said primary circuit (C1) for distribution of heating water in premises;the hydraulic valve assembly (13*) being characterized in that said second, lateral, sub-assembly (STG2) further comprises at least one device (40) for crossing of the sanitary waters; said at least one device (40) for crossing of the sanitary waters being connected to an inlet and outlet of said secondary heat exchanger (20), that is to an inlet (19) for sanitary cold water, and to an outlet (21) for sanitary hot water; said at least one device (40) for crossing of the sanitary waters being arranged such that heat can be transferred from the sanitary hot water to the sanitary cold water; and such that in said at least one device (40) for crossing of the sanitary waters there is no mixing between the sanitary cold water and the sanitary hot water. - The hydraulic valve assembly (13*) as claimed in Claim 1, characterized in that said device (40) for crossing of the sanitary waters comprises a first pipe (CND1), housed in which is a first horizontal portion (21A) of a pipe (21) for outlet of the sanitary hot water; said first pipe (CND1) and said horizontal portion (21A) being coaxial, and the horizontal portion (21A) moreover having a diameter smaller than that of the first pipe (CND1).
- The hydraulic valve assembly (13*) as claimed in Claim 2, characterized in that obtained by plastic deformation on the horizontal portion (21A) are two flanges (FLG1) and (FLG2) shaped like an annulus, equipped with respective O-rings, in such a way that the sanitary hot water (CS) that flows in the horizontal portion (21A) heats the sanitary cold water (FS) that enters the inlet pipe (17) and flows around the portion (21A) itself.
- The hydraulic valve assembly (13*), as claimed in any one of the preceding claims, characterized in that the three sub-assemblies (STG1, STG2, STG3) comprise fast-coupling hydraulic means for connection to one another and to the rest of the hydraulic network.
- The hydraulic valve assembly (13*) as claimed in any one of the preceding claims, characterized in that it comprises:- the first, central, sub-assembly (STG1) comprising pumping means (26), at least one portion of a pipe (28) for return of the cold water for heating (FR), and at least one portion of a pipe (29) for delivery to said main heat exchanger (16);- the second, lateral, sub-assembly (STG2), set on a first side with respect to said first sub-assembly (STG1), comprising an inlet (19) for the sanitary cold water, an outlet (21) for the sanitary hot water, and a return pipe (33) for return of the hot water for heating (CR) from the secondary heat exchanger (20); and- the third, lateral, sub-assembly (STG3), set on a second side with respect to said first sub-assembly (STG1), comprising a three-way valve (24) with a corresponding drive motor (25), at least one portion (21A) of an outlet pipe (21) for the sanitary hot water (CS), a delivery pipe (32) for delivery of the hot water for heating (CR) to the secondary heat exchanger (20), at least one portion of a return pipe (30) for return from the main heat exchanger (16) for the hot water for heating, and at least one portion of a delivery pipe (31) of the heating system for delivery of the hot water for heating (CR) to the heating element (ER).
- The hydraulic valve assembly (13*) as claimed in any one of the preceding claims, characterized in that it comprises two configurations:(1) a first configuration with the second sub-assembly (STG2) to the left of the first, central, sub-assembly (STG1), whilst the third sub-assembly (STG3) is positioned to the right of the first, central, sub-assembly (STG1); and(2) a second configuration with the second sub-assembly (STG2) to the right of the first, central, sub-assembly (STG1), whilst the third sub-assembly (STG3) is positioned to the left of the first, central, sub-assembly (STG1).
- The hydraulic valve assembly (13*) as claimed in Claim 1, characterized in that integrated in the first, central, sub-assembly (STG1) are:- a volute (VLT) of the pumping means (26) with corresponding intake header (CLTA) and delivery header (CLTM);- a supplementary attachment (ATT) of the three-way valve (24); and- a tap for a manometer (MN).
- The hydraulic valve assembly (13*), as claimed in any one of the preceding claims; the hydraulic valve assembly (13*) being characterized in that the pumping means (26) are set in a position corresponding to said secondary heat exchanger (20) and in that the main circuit (C1) is located in a position corresponding on a first side (PP) with respect to said secondary heat exchanger (20), whilst both an inlet pipe (17) for the sanitary cold water (FS) and an outlet pipe (21B) for the sanitary hot water (CS) are located on a second side (SP) opposite to said first side (PP) with respect to said secondary heat exchanger (20).
- The hydraulic valve assembly (13*), as claimed in any one of the preceding claims, characterized in that it is also provided with a delivery pipe (50) for delivery to a micro-accumulation tank (MCR) and a return pipe (60) for return of the hot water contained in the micro-accumulation tank (MCR) to the primary circuit (C1).
- The hydraulic valve assembly (13*), as claimed in Claim 9, characterized in that the pipes (50, 60) comprise two attachments (IAF) and (UAF) integrated in the second sub-assembly (STG2).
- The hydraulic valve assembly (13*), as claimed in Claim 1, characterized in that it provides that the two water-crossing devices (40, 40*) are set both on the same side; or else, alternatively, the two crossing devices (40, 40*) are set on a diagonal of the heat exchanger 20.
- The hydraulic valve assembly (13*), as claimed in any one of the preceding claims, characterized in that the three sub-assemblies (STG1), (STG2), (STG3) are each made of an enbloc assembly, i.e., with a single moulding operation, or else in that all three sub-assemblies (STG1), (STG2), (STG3) are formed together in a single enbloc assembly, i.e., with a single moulding operation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000456A ITBO20080456A1 (en) | 2008-07-21 | 2008-07-21 | HYDRAULIC VALVE GROUP FOR MURAL BOILERS |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2148149A2 EP2148149A2 (en) | 2010-01-27 |
EP2148149A8 EP2148149A8 (en) | 2010-05-19 |
EP2148149A3 EP2148149A3 (en) | 2016-08-17 |
EP2148149B1 true EP2148149B1 (en) | 2018-10-24 |
Family
ID=40589622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09166063.9A Active EP2148149B1 (en) | 2008-07-21 | 2009-07-21 | Hydraulic valve assembly for wall-mounted boilers |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2148149B1 (en) |
DK (1) | DK2148149T3 (en) |
ES (1) | ES2703009T3 (en) |
IT (1) | ITBO20080456A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2397777B1 (en) * | 2010-06-19 | 2016-08-03 | Grundfos Management A/S | Housing unit for a heating system |
EP2629019B1 (en) * | 2012-02-17 | 2016-04-13 | Grundfos Holding A/S | Housing unit for a heater |
GB2522404B (en) * | 2013-12-20 | 2018-08-22 | Ec Power As | Heat exchanger apparatus |
KR101639188B1 (en) * | 2014-11-19 | 2016-07-13 | 주식회사 경동나비엔 | Boiler having check valve integrated water pipe conduit |
ITUB20160469A1 (en) * | 2016-01-22 | 2017-07-22 | Ivar Spa | ADJUSTMENT DEVICE FOR THERMAL SYSTEMS |
EP3361182B1 (en) | 2017-02-08 | 2020-03-25 | Grundfos Holding A/S | Hydraulic component for a heating or air-conditioning system |
IT201800000748A1 (en) * | 2018-01-11 | 2019-07-11 | Elbi Int Spa | Hydraulic group for heating equipment. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2365953B (en) * | 2000-07-07 | 2004-08-25 | George Curtis | Heating systems |
FR2813950B1 (en) * | 2000-09-14 | 2002-11-15 | Chaffoteaux Et Maury | HYDRAULIC DISTRIBUTOR VALVE FOR A SYSTEM FOR PRODUCING HOT HEATING WATER AND DOMESTIC HOT WATER |
EP1418387B1 (en) * | 2002-11-08 | 2016-01-13 | Grundfos A/S | Compact heating system with two heating circuits |
DE50313603D1 (en) * | 2003-11-03 | 2011-05-19 | Grundfos As | Assembly unit for a compact heating system |
DE502005009452D1 (en) * | 2005-03-15 | 2010-06-02 | Grundfos Management As | Assembly unit for a compact heating system |
-
2008
- 2008-07-21 IT IT000456A patent/ITBO20080456A1/en unknown
-
2009
- 2009-07-21 EP EP09166063.9A patent/EP2148149B1/en active Active
- 2009-07-21 DK DK09166063.9T patent/DK2148149T3/en active
- 2009-07-21 ES ES09166063T patent/ES2703009T3/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP2148149A2 (en) | 2010-01-27 |
DK2148149T3 (en) | 2019-02-11 |
ES2703009T3 (en) | 2019-03-06 |
EP2148149A8 (en) | 2010-05-19 |
EP2148149A3 (en) | 2016-08-17 |
ITBO20080456A1 (en) | 2010-01-22 |
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