EP0692682A1 - Chaudière, en particulier chaudière mixte avec délivrance instantanée d'eau chaude sanitaire - Google Patents

Chaudière, en particulier chaudière mixte avec délivrance instantanée d'eau chaude sanitaire Download PDF

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Publication number
EP0692682A1
EP0692682A1 EP95201798A EP95201798A EP0692682A1 EP 0692682 A1 EP0692682 A1 EP 0692682A1 EP 95201798 A EP95201798 A EP 95201798A EP 95201798 A EP95201798 A EP 95201798A EP 0692682 A1 EP0692682 A1 EP 0692682A1
Authority
EP
European Patent Office
Prior art keywords
water
heat exchanger
boiler
primary
hot
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.)
Granted
Application number
EP95201798A
Other languages
German (de)
English (en)
Other versions
EP0692682B1 (fr
Inventor
Giorgio Scanferla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GIANNONI S.P.A.
Original Assignee
INTEGRA Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INTEGRA Srl filed Critical INTEGRA Srl
Publication of EP0692682A1 publication Critical patent/EP0692682A1/fr
Application granted granted Critical
Publication of EP0692682B1 publication Critical patent/EP0692682B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
    • 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
    • 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
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
    • 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
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
    • F24D3/1016—Tanks having a bladder

Definitions

  • the present invention relates to a boiler, preferably but not exclusively of the so-called combined type, comprising a first gas-water heat exchanger for producing primary hot water for space heating in heat exchange relationship with a second water-water heat exchanger for producing hot sanitary water through a primary piping system.
  • boiler of the so-called combined type indicates a boiler capable of delivering both hot water for space heating or primary water and hot water for sanitary use.
  • the technical problem underlying the present invention is accordingly that of conceiving and making available a boiler, in particular but not exclusively of the so-called combined type, which allows to fulfill in all its aspects the above mentioned need to ensure a prompt delivery of hot sanitary water and to have at the same time a minimum size and the minimum weight compatible with the services required to the boiler.
  • a boiler of the above mentioned type which is characterized in that it comprises in said primary piping system a storage and expansion unit for said hot water for space heating, means being provided for putting said unit in fluid communication with the second water-water heat exchanger.
  • the desired reduction in size and weight of the boiler is achieved by providing in the primary piping system of the boiler a combined unit wherein the reservoirs necessary to accumulate hot water and to compensate the thermal expansion of the water circulating in the primary piping system (expansion chamber) are combined in a single and common body.
  • the storage and expansion unit comprises a single tank having appropriate means allowing both accumulation of primary hot water and compensation of the thermal expansion which said water undergoes during the operation of the boiler.
  • the above mentioned means comprises a bag membrane in which is defined a hot water storage zone supported within the tank wherein it is free to expand or shrink depending on the temperature of the accumulated hot water.
  • the storage and expansion unit is installed between the above mentioned primary and secondary heat exchangers and inside the boiler body.
  • reference number 1 indicates a boiler, in particular a wall boiler of the so-called combined type, in accordance with a preferred embodiment of the present invention.
  • the boiler 1 comprises a vessel 2 essentially parallelepipedic in shape and having at the front a control panel 3 comprising an electronic control unit, control panel 3 comprising an electronic control unit, known per se, for controlling and regulating the boiler.
  • the boiler 1 comprises a gas-water heat exchanger 4 for producing primary hot water for space heating (indicated hereinafter by the term: primary exchanger), in fluid communication - through a primary piping system globally indicated by reference 5 - with a plurality of radiant elements 6 and with a second water-water heat exchanger 7 for producing hot sanitary water (indicated hereinafter by the term: secondary exchanger).
  • primary exchanger gas-water heat exchanger 4 for producing primary hot water for space heating
  • secondary exchanger for producing hot sanitary water
  • the primary piping system 5 three fluid paths, closed in a loop and in mutual parallel relationship, are defined to connect the primary heat exchanger 4 respectively with the radiant elements 6, with a primary water storage and expansion unit 8 and with the secondary heat exchanger 7.
  • a first path comprises a first branch 9a defined within the boiler 1 and including ducts 10, 11 respectively for water delivery to and return from the primary heat exchanger 4 and a second branch 9b located outside the boiler 1 and including deliver and return ducts 12, 13 connected to the radiant elements 6.
  • a second fluid path is indicated by 14 and comprises exchanger 4, a pair of ducts 15, 16 respectively for feeding to and withdrawing primary water from the storage and expansion unit 8, a hydraulically controlled 3-way valve 17 and a pair of ducts 18, 19 for returning the primary water to the heat exchanger 4.
  • a third fluid path 20 comprises the duct 10 for water delivery to the primary heat exchanger 4, the ducts 15, 16 for feeding to and withdrawing primary water from the storage and expansion unit 8, the 3-way valve 17 and a pair of delivery and return ducts 21, 22 connected to the secondary heat exchanger 7.
  • the above mentioned duct 22 is connected in a known manner to the duct 19 for returning the primary water to the heat exchanger 4.
  • the fluid paths 14 and 20 are entirely supported within the vessel 2.
  • the primary water flow in each of the fluid paths 9, 14 and 20 is promoted by a variable-speed pump 23 of known type and incorporating a 3-way valve.
  • the primary water flow is also directed towards one or the other of the parallel fluid paths 14 and 20 provided inside the boiler by means of the 3-way valve 17 as will be clarified in more detail hereinbelow.
  • the 3-way valve 17 is driven in a known manner by an actuator 31, incorporating a flow sensor, mounted on a duct 24 provided for feeding cold sanitary water taken from the water mains to the secondary heat exchanger 7.
  • Reference numeral 25 indicates a duct extending from the secondary heat exchanger 7 and designed for delivering hot sanitary water to the users.
  • the above mentioned ducts 24 and 25 are also equipped with fittings of conventional type - not shown - for connection with an external system for distribution of the hot sanitary water to the users which system is in turn equipped with corresponding fittings, also not shown, designed to be inserted in a water-tight manner thereon.
  • the storage and expansion unit 8 for hot primary water comprises a tank 26 in which is conventionally supported a membrane 27 of the so-called bag type.
  • a zone 28 is defined for storing a predetermined quantity of hot primary water temperature of which is constantly measured and controlled by a thermostat 30 of conventional type.
  • variable-volume airspace 29 including air, optionally under pressure, or another appropriate gas.
  • the pump 23 promotes circulation of the fluid from the duct 13 to the duct 10 for water delivery to the primary heat exchanger 4 and cuts off the duct 19 while the 3-way valve 17 closes the duct 16.
  • the hot primary water circulates exclusively in the fluid path 9 so as to give away to the radiant elements 6 part of the heat supplied thereto by the primary heat exchanger 4.
  • the temperature of the hot primary water accumulated in the unit 8 is kept at a constant value thanks to the intervention of the thermostat 30.
  • this thermostat drives the burner of the boiler so as to deliver the maximum thermal power to the primary heat exchanger 4, stops any fluid flow in the path 9 by means of the pump 23 and switches the 3-way valve 17 on so as to allow a primary water flow from the duct 16 to the duct 18.
  • the actuator 31 incorporating the flow sensor drives the pump 23 and the 3-way valve 17 so as to allow a primary water flow from the duct 16 to the duct 21, i.e. from the storage and expansion unit 8 to the secondary heat exchanger 7 and therefrom to the primary heat exchanger 4.
  • the hot primary water stored in the unit 8 is immediately sent to the secondary heat exchanger 7 where it releases its heat to the cold water drawn from the water mains and thus allows quick delivery of hot water from the boiler 1.
  • the primary water heated by the primary heat exchanger 4 is fed by the pump 23 to the unit 8 in order to replace the stored hot water delivered to the secondary heat exchanger 7.
  • this adjustment may be performed by means of a thermostat, not shown, provided on the duct 25 and which regulates the flow rate delivered by the pump 23 and, optionally, also the thermal power delivered by the burner to the primary heat exchanger 4.
  • the boiler When the sanitary water witdrawal is terminated and depending upon the temperature detected by the thermostat 30, the boiler returns to the pre-existing operating conditions or accumulates new hot primary water in the unit 8 as disclosed hereinabove.
  • the unit 8 in addition to fulfilling the important function of heat accumulator able to supply ready-to-use hot water to the secondary heat exchanger 7, compensates all the thermal expansions/contractions of the primary water thus ensuring a correct operation of the boiler 1.
  • the burner of the primary heat exchanger 4 and/or the pump 23 are started - by known procedures - if and when they are in stand-by status.
  • the boiler 1 allows a prompt delivery of hot sanitary water with spaces reduced to a minimum even when the storage and expansion unit 8 is installed outside of the vessel 2.
  • both the storage and expansion unit 8 and the secondary heat exchanger 7 with associated inlet and outlet ducts may be installed outside of the vessel 2.
  • the boiler of the present invention allows to achieve, in addition to a prompt delivery of hot sanitary water with waiting times reduced to a minimum, a gradual and in any case reduced use of the primary water stored in the storage and expansion unit 8.
  • the boiler of the present invention thus allows an optimal use of the accumulated heat which can be metered to face in an extremely flexible and durable manner the most varied requirements of hot sanitary water withdrawals.
  • Integrating the storage and expansion functions in the same unit also allows to obtain the desired prompt delivery of hot sanitary water while using a boiler of extremely small size and weight.
  • the size of the boiler is reduced to a minimum by incorporating the storage and expansion unit 8 inside the boiler vessel.
  • the airspace 29 between the bag membrane 27 and the tank 26 contributes to the thermal insulation of the membrane 27, thus allowing to reduce and in some cases to eliminate the insulation layers normally provided on the outer surface of the accumulation tanks of the prior art.
  • the unit 8 By integrating the storage and expansion functions in a single structure, the unit 8, the further considerable advantage of a "self-regulation" of the primary water storing capacity in the membrane 27 is achieved.
  • the storage capacity in the zone 28 is at its highest level and thus allows ample compensation for the heat loss in the various ducts.
  • the storage capacity in the zone 28 is at its lowest level and in perfect alignment with the lesser thermal inertia of the secondary heat exchanger 7 and the lesser heat loss due to the various ducts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (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)
EP95201798A 1994-07-15 1995-07-01 Dispositif de chaudière, en particulier chaudière mixte avec délivrance instantanée d'eau chaude sanitaire Expired - Lifetime EP0692682B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI941487 1994-07-15
ITMI941487A IT1271673B (it) 1994-07-15 1994-07-15 Caldaia in particolare del tipo cosiddetto combinato a rapida erogazione di acqua calda sanitaria

Publications (2)

Publication Number Publication Date
EP0692682A1 true EP0692682A1 (fr) 1996-01-17
EP0692682B1 EP0692682B1 (fr) 2000-03-01

Family

ID=11369291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95201798A Expired - Lifetime EP0692682B1 (fr) 1994-07-15 1995-07-01 Dispositif de chaudière, en particulier chaudière mixte avec délivrance instantanée d'eau chaude sanitaire

Country Status (4)

Country Link
EP (1) EP0692682B1 (fr)
DE (1) DE69515220T2 (fr)
ES (1) ES2146286T3 (fr)
IT (1) IT1271673B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301423A (en) * 1995-03-18 1996-12-04 Clive Michael Perry Heat exchanger management system
GB2335029A (en) * 1998-03-07 1999-09-08 Baxi Heating Ltd A combined expansion and thermal storage vessel
EP0843133A3 (fr) * 1996-11-15 1999-10-27 Richard Vetter Chaudière à eau chaude
EP0992743A2 (fr) * 1998-10-09 2000-04-12 Baxi S.p.a. Chaudière à gaz avec moyens pour accumuler et maintenir chaude de l'eau sanitaire
EP1028293A1 (fr) 1999-02-12 2000-08-16 Giorgio Scanferla Unité pour échange et accumulation de chaleur pour chauffe-eau, procédé de fabrication et chauffe-eau avec une telle unité
GB2361295A (en) * 2000-03-13 2001-10-17 Hong Kong And China Gas Co Ltd Water heating apparatus
EP1691138A2 (fr) * 2005-02-15 2006-08-16 Robert Bosch Gmbh Chaudière mixte et procédé pour son opération
CN109564006A (zh) * 2016-07-26 2019-04-02 株式会社能率 供暖热水供给装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9115237U1 (de) * 1990-12-10 1992-02-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Heizeinrichtung
DE4236967A1 (en) * 1991-11-04 1993-05-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid, De Heating system with circulating pump - has hot-water storage tank in series with primary branch of heat-exchanger
GB2262593A (en) * 1991-12-17 1993-06-23 Inter Albion Ltd An apparatus for and method of providing hot sanitary water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9115237U1 (de) * 1990-12-10 1992-02-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Heizeinrichtung
DE4236967A1 (en) * 1991-11-04 1993-05-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid, De Heating system with circulating pump - has hot-water storage tank in series with primary branch of heat-exchanger
GB2262593A (en) * 1991-12-17 1993-06-23 Inter Albion Ltd An apparatus for and method of providing hot sanitary water

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301423A (en) * 1995-03-18 1996-12-04 Clive Michael Perry Heat exchanger management system
EP0843133A3 (fr) * 1996-11-15 1999-10-27 Richard Vetter Chaudière à eau chaude
GB2335029A (en) * 1998-03-07 1999-09-08 Baxi Heating Ltd A combined expansion and thermal storage vessel
GB2335029B (en) * 1998-03-07 2001-11-28 Baxi Heating Ltd Hot water expansion vessel
EP0992743A2 (fr) * 1998-10-09 2000-04-12 Baxi S.p.a. Chaudière à gaz avec moyens pour accumuler et maintenir chaude de l'eau sanitaire
EP0992743A3 (fr) * 1998-10-09 2002-08-14 Baxi S.p.a. Chaudière à gaz avec moyens pour accumuler et maintenir chaude de l'eau sanitaire
EP1028293A1 (fr) 1999-02-12 2000-08-16 Giorgio Scanferla Unité pour échange et accumulation de chaleur pour chauffe-eau, procédé de fabrication et chauffe-eau avec une telle unité
GB2361295A (en) * 2000-03-13 2001-10-17 Hong Kong And China Gas Co Ltd Water heating apparatus
EP1691138A2 (fr) * 2005-02-15 2006-08-16 Robert Bosch Gmbh Chaudière mixte et procédé pour son opération
EP1691138A3 (fr) * 2005-02-15 2010-10-27 Robert Bosch Gmbh Chaudière mixte et procédé pour son opération
CN109564006A (zh) * 2016-07-26 2019-04-02 株式会社能率 供暖热水供给装置

Also Published As

Publication number Publication date
ITMI941487A1 (it) 1996-01-15
IT1271673B (it) 1997-06-04
DE69515220T2 (de) 2000-11-09
ITMI941487A0 (it) 1994-07-15
EP0692682B1 (fr) 2000-03-01
ES2146286T3 (es) 2000-08-01
DE69515220D1 (de) 2000-04-06

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