EP0519030B1 - Gaserhitzter wasserkessel - Google Patents
Gaserhitzter wasserkessel Download PDFInfo
- Publication number
- EP0519030B1 EP0519030B1 EP92901161A EP92901161A EP0519030B1 EP 0519030 B1 EP0519030 B1 EP 0519030B1 EP 92901161 A EP92901161 A EP 92901161A EP 92901161 A EP92901161 A EP 92901161A EP 0519030 B1 EP0519030 B1 EP 0519030B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- heating appliance
- water
- walls
- fired
- 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
Links
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
- 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
- F24H1/523—Heat exchangers for sanitary water directly heated by the burner
-
- 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
-
- 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
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
- F24H9/0031—Guiding means in combustion gas channels with means for changing or adapting the path of the flue gas
-
- 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
- F24H9/148—Arrangements of boiler components on a frame or within a casing to build the fluid heater, e.g. boiler
Definitions
- the present invention relates to a gas-fired water heating appliance according to the preamble of claim 1.
- gas-fired water heating appliance is used to both denote a gas-fired boiler intended to supply heated water for sanitary and space heating purposes, and so-called “instant” or prompt delivery water heaters only intended for supplying sanitary heated water.
- a first unfavorable aspect of conventional water heaters when used in boiler applications is that liquid leakage paths may develop in the water-water heat exchanger arranged for transferring heat to the secondary fluid (sanitary heated water) from the primary one (heated water for room heating), which would result in some of the room heating water becoming admixed to the sanitary water and undesirably contaminating it.
- a second unfavorable aspect of prior water heating appliances for instant water heater use is that it is difficult to fulfill efficiently varying sanitary hot water tapping demands.
- hot water tapping may vary, for example, between a required minimum to fill a kitchen sink to a maximum for filling a bath tub.
- the appliance is sized for small demands, it will be uncapable of fulfilling high ones, and conversely, if sized for high demands, a substantial efficiency loss will have to be accepted along with an incapacity to maintain to a desired constant value the temperature of the heated water.
- means are provided in the appliance for excluding the flue gases from passing through the second heat exchanger (for sanitary water), located downstream the first one (for water for room heating).
- a water heating appliance in particular a wall mounted gas-fired boiler of the instant type, intended to produce hot water for both room heating and sanitary purposes.
- the boiler 1 has a front panel 2 and a pair of juxtaposed side walls 3a, 3b adapted to be anchored to a plate-like, load-carrying hanger frame 4 which extends parallel to the front panel 2.
- the front panel 2, side walls 3a, 3b, and hanger frame 4 jointly form a casing substantially parallelepipedic in shape, on whose inside a plate-like member 5 is supported which has a box-type body, also substantially parallelepipedic in shape, and a bottom wall 5a and juxtaposed long 5b-5c and short 5d-5e sidewalls.
- the plate-like member 5 is air-tight secured with its free ends onto the hanger frame 4 in a manner known per se, such as through the use of screw fasteners and sealing gaskets.
- the hanger frame 4 and plate-like member 5 border a box-type, sealed boiler chamber having a path 16 defined therethrough for the flue gases outflowing from a gas burner 7 of the fully pre-mixed, high flame density type.
- respective pipe coils 8, 9 which comprise respective primary 11 and secondary 12 heat exchangers operative to produce, the former heated water for room heating, and the latter heated water for sanitary use.
- the pegs 13, 14 are held apart by a partition 15 which extends parallel to the frame 4 and the wall 5a, wherebetween it is supported conventionally by the side walls 5b, 5c of the plate-like member 5.
- the partition 15 being formed preferably from a thermally insulative material and having reflective surfaces, splits the gas flow path 16 into two parallel paths 16a, 16b, respectively defined in co-operation with the hanger frame 4 and the bottom wall 5a of the plate-like member 5.
- Means 18, adapted to selectively direct the flue gases to either of said gas flow paths 16a, 16b, are provided at the top end of the partition 15.
- Said means 18 comprise a baffle plate 19, having an actuator 20 which is driven conventionally as explained hereinafter by a control device 10 to suit the demand for sanitary heated water.
- the boiler chamber 6 is in gas communication with a smoke exhaust duct 22 through a slit 21 formed across the frame 4 below the pipe coil 8.
- This duct is defined between the hanger frame 4 and a box-shaped metal sheet 23 conventionally sealed to the frame 4 as by welding.
- the smoke exhaust duct 22 ( Figure 3) extends parallel to the pipe coil 8 and in gas communication at the top with a smoke exhaust header 25 on the boiler exterior, through an opening 24 formed in the frame 4.
- the pipe coil 8 forming the primary heat exchanger 11 is in liquid communication ( Figure 4) with a deaerator 28, in turn communicating, through a line 27, with the suction port 26a of a pump 26 for circulating hot water for room heating.
- the latter is delivered by the pump 26 to an external circuit -- not shown -- over a line 31, also formed in the frame 4, having opposed openings 32 and 33.
- the pipe coil 8 is in fluid communication with the room heating circuit through a line 30 having an inlet opening 29 and communicating with an expansion tank 17 through a pipe 30a.
- the openings 29 and 33 therefore, respectively constitute an inlet and an outlet for the room heating hot water from the boiler.
- conduits formed in parallel through the hanger frame 4 and adapted to connect a sanitary hot water delivery system to the pipe coil 9 constituting the secondary heat exchanger.
- the conduits 34, 35 are connected to the pipe coil 9 through tubular fittings 36 and 37 and provided with openings 34a,b and 35a,b at their opposed ends.
- the openings 34a, 35a respectively constitute an inlet and an outlet for sanitary hot water from the boiler (see Figure 4).
- Designated 41 is a flow sensor which is mounted coaxially in the tubular fitting 36 activated by the flow of the sanitary heated water.
- a gas supply duct 47 provided with juxtaposed gas inlet 48 and gas outlet 49 openings, enables the admission of a predetermined gaseous fuel flow rate into the duct 44.
- valve means 50 for controlling and regulating the gas flow rate.
- the duct 44 is also connected, through a branch duct 51, to the smoke exhaust duct 22, whereby the smoke can be diluted.
- control device 10 known per se, which can be accessed to from outside through a slit 53 provided in the front panel 2.
- the hanger frame 4 and plate-like member 5 may be formed by first and second juxtaposed metal sheets, and the ducts and/or pipe coils defined preferably as by press forming on one of said metal sheets, or alternatively, on both metal sheets.
- the ducts thus formed are then sealed by such conventional joining processes as laser or roller welding, or cementing.
- All the ducts or lines formed in the hanger frame 4 are also provided with fittings, not shown, fixed to the frame itself for connection to the remaining parts of the boiler or external circuits, in turn provided with connectors, not shown, adapted to fit sealingly thereon.
- the foregoing fittings also provide mechanical support for the various elements being connected thereto.
- the space heating water will be flown successively through the line 30, pipe coil 8, deaerator 28, line 27, pump 26, line 31, and finally discharged from the latter line through the opening 33.
- the fan 40 When the temperature of the room heating water dropps below a set value, the fan 40 is operated in a conventional way, such as by means of a thermostat. Thus, a selected air/gas mixture will be supplied to the burner 7 and burned thereat. Accordingly, the burner will heat the hanger frame 4 at the pipe coil 8, both directly and through the pegs 13, so as to heat, the water flowing through the pipe coil 8.
- the partition 15, being lined with a reflecting material, will limit heat dissipation by reflecting it back onto the peg 13.
- the smoke after flowing through the slit 21, is then passed into the duct 22, connected atop, via the header 25, to a conventional smoke stack, not shown.
- the smoke in flowing up the duct 22, the smoke will sweep across the frame 4 at the location of the pipe coil 8, and be maintained thereby at a temperature generally above the dew point, thus limiting the risk of condensate forming within the smoke stack.
- the last-mentioned risk is further attenuated by the fact that some of the air drawn in by the fan 40 is forced into duct 22 through duct 51 to dilute the flue gases and lower the dew point value.
- Any condensate formed in the smoke exhaust duct 22 is in any case collected in a conventional drain duct or sump, not shown, arranged at the bottom end of the duct.
- the flow sensor 41 arranged in the tubular fitting 36 sends a signal to the control device 10 to stop operation of the pump 26 and tilt the baffle plate 19 toward the hanger frame 4 by means of the actuator 20.
- baffle plate 19 whose position is illustrated by dash lines in Figure 5, will then shut off the gas flow path 16a and divert the flue gases from the burner toward the secondary heat exchanger 12.
- the boiler heating capacity is thus fully exploited to heat the sanitary water in a rapid and highly efficient manner.
- the actuator On removal of the demand for hot sanitary water, the actuator is placed back under control by the thermostat controlling the temperature of the room heating water, and where required, returned to its original position whereat it opens the gas flow path 16a.
- FIG. 6 Partially and schematically shown in Figures 6 and 7 is a second embodiment of a water heating appliance according to the invention, comprising in particular a wall mounted, gas-fired water heater of the instant type, designated 101.
- the primary 11 and secondary 12 heat exchangers are both intended for supplying heated water for sanitary use. Consequently, the water heater 101 is equipped with an additional flow sensor 42 located in the line 30 upstream of the pipe coil 8. In this case, the fluid flow through the heat exchangers 11 and 12 and their respective water circuits is advantageously promoted by the own pressure of the water supply, thereby the pump 26 is no longer required.
- the fan 40 is arranged to draw air directly from the environment, so that the air intake 39 and duct 38 are no longer necessary.
- the burner 7 is of the dual flame type, and the baffle plate 19 can be set into three positions, respectively tilted against the frame 4, against the plate-like member 5, and an intermediate one (see Figure 7).
- the heated water is tapped off through the opening 32 being fluid connected to the primary heat exchanger 11 (pipe coil 8) via the line 27.
- the flow sensor 42 will then control the positioning of the baffle plate 19 close against the plate-like member 5.
- the secondary heat exchanger 12 is operated when a larger amount of water is to be delivered through the opening 35a.
- the baffle plate 19 will move into the position illustrated in Figure 7 by full lines, to control heating of both pipe coils by the burner 7 and the flue gases issuing therefrom.
- heated water for sanitarty use is supplied from both heat exchangers 11 and 12.
- the baffle plate On removal of the demand from one or both outlets, the baffle plate will locate so as to shut off either of gas flow paths, 16a or 16b, as required.
- the water heater 101 is enabled to supply hot sanitary water in constant amounts at a constant temperature simultaneously to a number of outlets.
- the temperature of the water being heated through the heat exchangers can be controlled in an independent way within a broad range of values.
- the water heating appliance of this invention is of simplified, extremely compact construction; in fact, its depth dimension can be at least halved with respect to that of conventional water heating appliances.
- a further advantage afforded by the appliance of the invention, especially in boiler-type applications, is that it lends itself to the use within modular installations for room heating or producing hot sanitary water, which have a number of mutually spaced, parallel walls, whereby a high heating capacity and substantial operational flexibility can be built in, within limited volumes.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Incineration Of Waste (AREA)
Claims (10)
- Gasbeheiztes Wassererwärmungsgerät bzw. Warnwassergerät mit einem Brenner (7), einem dem Brenner (7) zugeordneten Kesselraum (6), einem ersten und einem zweiten Wärmetauscher (11, 12), die konstruktiv und hydraulisch voneinander unabhängig und längs einer Strömungsbahn (16) von vom Brenner (7) entlassenen Gasen, die von letzterem innerhalb des Geräts ausgeht, plaziert sind, dadurch gekennzeichnet, daß die Wärmetauscher (11, 12) einstückig innerhalb jeweiliger gegenüberstehender Wände (4, 5a) des Kesselraums (6) geformt sind, (und) das Gerät ferner eine Trennwand (15), die zwischen den Wärmetauschern (11, 12) liegt und längs diesen verläuft und dabei zwei jeweils durch die Trennwand (15) und jede der Wände (4, 5a) begrenzte parallele Abschnitte (16a, 16b) der Strömungsbahn (16) festlegt, und Mittel (18) zum selektiven Richten oder Leiten der Abgase zu einem oder beiden der Abschnitte (16a, 16b) der (Strömungs-)Bahn (16) umfaßt.
- Gasbeheiztes Warmwassergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel (18) zum selektiven Richten oder Leiten der Abgase eine an der Trennwand (15) montierte und sich von dieser in Richtung auf den Brenner (7) erstreckende Leitplatte (19) umfassen.
- Gasbeheiztes Warmwassergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel (18) einen Doppelflammentyp-Brenner (7) umfassen.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Wärmetauscher (11, 12) jeweilige, in den Wänden (4, 5a) geformte Rohrschlangen (8, 9) aufweisen.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß mindestens eine der Wände (4, 5a) einen lastaufnehmenden Aufhängerahmen für das Gerät bildet.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß es mindestens eine Gas/Luftgemisch-Zuführleitung (44), die in mindestens einer der Wände (4, 5a) geformt ist und mit dem Brenner (7) in Fluidverbindung steht, aufweist.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine Anzahl von an gegenüberliegenden Seiten der Wärmetauscher (11, 12) befestigten Zapfen (13, 14) von mindestens einer der Wände (4, 5a) in Richtung auf die Abgas-Strömungsbahn (16) abstehen.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Kesselraum (6) in Gasverbindung mit einer parallel zum ersten Wärmetauscher (11) liegenden Rauchabsaugleitung (22) steht.
- Gasbeheiztes Warmwassergerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß mehrere Leitungen (27, 30, 34, 35) zum Umwälzen von Fluid durch das Gerät einstückig oder materialeinheitlich mit mindestens einer der Wärme (4, 5a) geformt sind.
- Gasbeheiztes warnwassergerät nach Anspruch 9, dadurch gekennzeichnet, daß die Leitungen (27, 30, 34, 35) eine Anzahl von an mindestens einer der Wände (4, 5a) befestigten Anschlüssen für Verbindung mit jeweiligen Wasserrohrleitungsbauteilen aufweisen, welche Anschlüsse eine mechanische Unterstützung für die Wasserrohrleitungsbauteile bieten.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI910037 | 1991-01-09 | ||
ITMI910037A IT1245084B (it) | 1991-01-09 | 1991-01-09 | Apparecchio scalda-acqua a gas |
PCT/EP1991/002482 WO1992012390A1 (en) | 1991-01-09 | 1991-12-20 | A gas-fired water heating appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0519030A1 EP0519030A1 (de) | 1992-12-23 |
EP0519030B1 true EP0519030B1 (de) | 1995-08-30 |
Family
ID=11358047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92901161A Expired - Lifetime EP0519030B1 (de) | 1991-01-09 | 1991-12-20 | Gaserhitzter wasserkessel |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0519030B1 (de) |
AT (1) | ATE127210T1 (de) |
DE (1) | DE69112612T2 (de) |
ES (1) | ES2076738T3 (de) |
IT (1) | IT1245084B (de) |
WO (1) | WO1992012390A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19726630C2 (de) * | 1996-06-20 | 2002-10-31 | Heim Johann Ludwig | Wasserheizer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT400625B (de) * | 1994-05-27 | 1996-02-26 | Vaillant Gmbh | Anlage zur heiz- und brauchwasserbereitung mit einem gasbeheizten brenner und einem wärmetauscher |
IT243846Y1 (it) * | 1998-03-13 | 2002-03-06 | Iaber Spa | Intelaiatura di supporto perfezionata per caldaie a gas murali |
ITMI20041181A1 (it) * | 2004-06-11 | 2004-09-11 | Baxi Spa | Caldaia ad alto rendimento di tipo tradizionale operante con recupero del calore dei fumi in corrispondenza sullo scambiatore primario |
GB2422892B (en) * | 2005-02-04 | 2009-10-14 | Heating World Group Ltd | Boilers |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH365198A (de) * | 1958-10-09 | 1962-10-31 | Mueller Walter | Zentralheizungskessel mit Warmwasserbereiter |
DE2141785A1 (de) * | 1971-08-20 | 1973-02-22 | Rheinstahl Ag | Gusseiserner gliedergasheizkessel |
FR2606127B1 (fr) * | 1986-11-03 | 1989-02-10 | Muller Cie | Chassis pour chaudiere notamment murale pour le chauffage et l'eau sanitaire |
-
1991
- 1991-01-09 IT ITMI910037A patent/IT1245084B/it active IP Right Grant
- 1991-12-20 AT AT92901161T patent/ATE127210T1/de not_active IP Right Cessation
- 1991-12-20 EP EP92901161A patent/EP0519030B1/de not_active Expired - Lifetime
- 1991-12-20 DE DE69112612T patent/DE69112612T2/de not_active Expired - Fee Related
- 1991-12-20 WO PCT/EP1991/002482 patent/WO1992012390A1/en active IP Right Grant
- 1991-12-20 ES ES92901161T patent/ES2076738T3/es not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19726630C2 (de) * | 1996-06-20 | 2002-10-31 | Heim Johann Ludwig | Wasserheizer |
Also Published As
Publication number | Publication date |
---|---|
EP0519030A1 (de) | 1992-12-23 |
ATE127210T1 (de) | 1995-09-15 |
IT1245084B (it) | 1994-09-13 |
ES2076738T3 (es) | 1995-11-01 |
DE69112612T2 (de) | 1996-02-22 |
ITMI910037A0 (it) | 1991-01-09 |
DE69112612D1 (de) | 1995-10-05 |
WO1992012390A1 (en) | 1992-07-23 |
ITMI910037A1 (it) | 1992-07-09 |
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