EP0668984B1 - Self-supporting water heater, adapted to be made of plastic material - Google Patents

Self-supporting water heater, adapted to be made of plastic material Download PDF

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Publication number
EP0668984B1
EP0668984B1 EP94926228A EP94926228A EP0668984B1 EP 0668984 B1 EP0668984 B1 EP 0668984B1 EP 94926228 A EP94926228 A EP 94926228A EP 94926228 A EP94926228 A EP 94926228A EP 0668984 B1 EP0668984 B1 EP 0668984B1
Authority
EP
European Patent Office
Prior art keywords
container
water heater
plastic material
self
faces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94926228A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0668984A1 (en
Inventor
Romano Nardi
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.)
Nardi Tecnologie Srl
Original Assignee
Nardi Tecnologie 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 Nardi Tecnologie Srl filed Critical Nardi Tecnologie Srl
Publication of EP0668984A1 publication Critical patent/EP0668984A1/en
Application granted granted Critical
Publication of EP0668984B1 publication Critical patent/EP0668984B1/en
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
    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/181—Construction of the tank

Definitions

  • the present invention deals with a self-bearing water heater, adapted to be made of plastic material.
  • FR-A-2 479 429 that is deemed as the most relevant prior art, discloses a heat accumulator comprising a first, or internal container made of synthetic material and a second, or external, insulating container whose internal contour corresponds to the external shape of the first, internal container and that is stiffly placed around it.
  • Object of the present invention is to solve the above inconveniences, providing a simple and practical water heater, of a particular shape, made of suitable plastic material, that among other things provides the following advantages:
  • a further major characteristic of the water heater of the invention is that on the shorter bottom face of the first container, there are assembled, in addition to the typical water heater elements like resistance and outlet pipe for hot water, a safety valve and a pressure reducer, the latter one being adapted to reduce pressure inside the container and to avoid possible water hammers, with clear, obvious benefits for water heater operation and life, under maximum safety conditions.
  • a further characteristic of the water heater of the invention is that said hollow "pulling ducts", running perpendicular to the wider container faces, are adapted to make mechanical members pass through them, like tie rods and/or bolts to secure the container itself to the wall or for other purposes, some of which are specified below.
  • the internal container is obtained in a single piece in suitable plastic material, such as polyethylene or polypropylene; the external container being made of ABS and the insulating material being foamed polyurethan.
  • the internal container made of suitable plastic material like polyethylene or polypropylene, is obtained in two pieces, or opposed shells, joined together making their respective edges and the "pulling ducts" of each shell mate; sealing of said two shells being obtained adequately shaping said edges to allow a suitable matching thereof, downstream of which a gasket is provided running for the whole container periphery, and joining together with suitable securing means or bolts said edges, and, with suitable gaskets, the "pulling ducts" of each shell; the external container being made of ABS and the insulating material being foamed polyurethan.
  • suitable plastic material like polyethylene or polypropylene
  • both the first and the second embodiment can be obtained through injection molding, vacuum molding, or by blowing suitable plastic material.
  • the water heater of the invention is substantially composed of: a first, or internal container 1 made of suitable plastic material and a second, or external container 3 also made of suitable plastic material in which the first, or internal container 1 is placed after having inserted suitable insulating material 5 between the two containers 1 and 3.
  • the first container 1 is shaped as a parallelepiped, with rectangular section, where the two greater faces 7 (front and rear ones) are crossed and connected by a plurality of hollow ducts 9 perpendicular to said faces 7, running as tie rods from one face to the other.
  • a plurality of notches 11 is provided in each face 7 next to each duct 9. Said faces 7 are furrowed by a plurality of external grooves 13 perpendicular to the sides and intersecting said notches 11, running as a ring on the whole periphery of the body 1 section and composing, with the above pulling ducts 9, the container 1 rib.
  • the second container 3 is shaped as a parallelepiped, with rectangular section, adequately thick, adapted to house the first container 1 inside it; the clearance provided between said first and said second container being, as already said, adequately filled with insulating material 5, like foamed plastic material.
  • a safety valve 23 and a pressure reducer 25 On the shorter bottom face 15 of the first container 1, there are assembled, in addition to the typical water heater elements like resistance 19 and outlet pipe 21 for hot water, a safety valve 23 and a pressure reducer 25, the latter one being adapted to reduce pressure inside the container and to avoid possible water hammers, with clear, obvious advantages for water heater operation and life.
  • a temperature gauge 27 is provided on a (front) face 29 of the second container 3.
  • hollow pulling ducts 9, running perpendicular to the wider faces 7 of the container 1, are adapted to make mechanical members pass through them, like tie rods and/or bolts to secure the container itself to the wall or for other purposes, some of which will be specified below.
  • the internal container is obtained in a single piece in suitable plastic material, such as polyethylene or polypropylene; the external container being preferably made of ABS and the insulating material being preferably foamed polyurethan.
  • the internal container made of suitable plastic material is obtained in two pieces 31, or opposed shells, joined together making their respective edges 33 and the "pulling ducts" 35 of each shell mate; sealing of said two shells 31 being obtained adequately shaping said edges 33 to allow a suitable matching thereof, downstream of which a gasket 37 is provided running for the whole container periphery, and joining with suitable securing means or bolts 39 said edges 33, and, with suitable gaskets, the "pulling ducts" 35 of each shell.
  • suitable plastic material like polyethylene or polypropylene
  • Both the first and the second embodiment can be obtained through injection molding with shell die, vacuum molding, or further by blowing suitable plastic material.
  • the plastic material preferably used for the second container 3 is ABS and the insulating material 5 provided in the hollow space between first container 1 and second container 3 is preferably foamed polyurethan.
  • the internal and external containers can be realized through other production techniques that are typical of the wide range of available plastic materials.
  • the internal container 1 is designed in a suitable plastic material with such thickness as to guarantee an easy and safe operation under the various recurring operating conditions; however, for greater safety, a further safety element is provided applied to said internal container 1; this element is composed of a fencing with tapes 41, strap-type, running along the external grooves of the container itself and creating a network element around it. Said tapes 41 are adequately joined together, for example through bolts 43 or the like.

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)
  • Packages (AREA)
  • Cookers (AREA)
  • Air Humidification (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Laminated Bodies (AREA)
  • Details Of Fluid Heaters (AREA)
  • Resistance Heating (AREA)
EP94926228A 1993-09-17 1994-09-01 Self-supporting water heater, adapted to be made of plastic material Expired - Lifetime EP0668984B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTO930684 1993-09-17
ITTO930684A IT1261870B (it) 1993-09-17 1993-09-17 Scaldaacqua autoportante, atto ad essere costituito in materiale plastico.
PCT/EP1994/002900 WO1995008085A1 (en) 1993-09-17 1994-09-01 Self-bearing water heater, adapted to be made of plastic material

Publications (2)

Publication Number Publication Date
EP0668984A1 EP0668984A1 (en) 1995-08-30
EP0668984B1 true EP0668984B1 (en) 1997-12-29

Family

ID=11411740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926228A Expired - Lifetime EP0668984B1 (en) 1993-09-17 1994-09-01 Self-supporting water heater, adapted to be made of plastic material

Country Status (7)

Country Link
EP (1) EP0668984B1 (it)
AT (1) ATE161619T1 (it)
AU (1) AU7614994A (it)
BR (1) BR9405595A (it)
DE (1) DE69407562D1 (it)
IT (1) IT1261870B (it)
WO (1) WO1995008085A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049257A1 (de) * 2005-10-14 2007-04-26 Webasto Product Italy Spa, Colturano Warmwasserspeicher

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59705030D1 (de) * 1996-05-03 2001-11-29 Kaldewei Franz Gmbh & Co Warmwasserspeicher mit einem Innenbehälter
WO2000043716A1 (en) 1999-01-21 2000-07-27 Goitre, Tiziana A self-supporting plastic material water heater
SE518211C2 (sv) * 1999-12-15 2002-09-10 Swep Int Ab Varmvattenberedare omfattande en plattvärmeväxlare och en lagringsbehållare

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH425147A (de) * 1965-10-28 1966-11-30 Therma Ag Dünnwandiger Druckbehälter und Verfahren zur Herstellung desselben
DE3011426A1 (de) * 1980-03-25 1981-10-01 Schneider, Helmhold, 5230 Altenkirchen Kunststoff-waermespeicher, insbesondere fuer die warmwasserspeicherung im haustechnischen bereich u.dgl., sowie verfahren zu seiner hertellung
US4609106A (en) * 1983-11-22 1986-09-02 Vittorio Gentili Portable jerrican-like container having a suitable-to-be-palletized casing
DE3710264A1 (de) * 1987-03-28 1988-10-13 Gerhard Rambacher Behaelter aus kunststoff
DE9108101U1 (de) * 1991-07-02 1991-08-29 Gebr. Jacobs GmbH & Co KG, 5600 Wuppertal Heißwasserbehälter
DE4216633C2 (de) * 1992-05-20 1996-03-21 Mn Heizungsmontage Gmbh Warmwasserspeicher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049257A1 (de) * 2005-10-14 2007-04-26 Webasto Product Italy Spa, Colturano Warmwasserspeicher

Also Published As

Publication number Publication date
ITTO930684A0 (it) 1993-09-17
AU7614994A (en) 1995-04-03
ITTO930684A1 (it) 1995-03-17
ATE161619T1 (de) 1998-01-15
WO1995008085A1 (en) 1995-03-23
BR9405595A (pt) 1999-09-08
IT1261870B (it) 1996-06-03
DE69407562D1 (de) 1998-02-05
EP0668984A1 (en) 1995-08-30

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