RU2000120321A

RU2000120321A - WATER HEATER EXECUTED FROM PLASTIC PRESSURE RESISTANT

Info

Publication number: RU2000120321A
Application number: RU2000120321/06A
Authority: RU
Inventors: Руджеро МАРКЕТТИ
Original assignee: Мерлони Термосанитари С.П.А.
Priority date: 1997-12-29
Filing date: 1998-12-08
Publication date: 2002-09-10

Claims

1. A water heater made of plastic, comprising a main body (2), comprising two half-shells (2a, 2b) and having an opening (5) for introducing a heating element (3), each half-shell (2a, 2b) having a peripheral edge (9 ) with connecting means (10a, 10b) that can connect with connecting means of the other half-shell to form a strip with higher resistance, and radial reinforcing elements (8) that extend from each peripheral edge (9) and converge in the central region of each half-shell (2 a, 2b).

2. A water heater according to claim 1, characterized in that the radial reinforcing elements (8) are ribs protruding into each half-shell (2a, 2b).

3. A water heater according to claim 1, characterized in that inside the main body there are water supply tubes (6) made of plastic.

4. A water heater according to claim 3, characterized in that the tubes (6) are made of thermosetting material.

5. A water heater according to claim 1, characterized in that it comprises an outer casing (7) separated from the main body (2) by an air gap.

6. A water heater according to claim 5, characterized in that the outer casing (7) is made of thermoplastic material.

7. The water heater according to claim 1, characterized in that it contains a thin layer of plastic to cover the main body, applied by winding or by co-extrusion.

8. A water heater according to claim 1, characterized in that the connecting means (10a, 10b) contain connecting belts that complement each other, and at least one of the two connecting belts (10b) has an annular groove (11) for accommodating the welding material ( 12) during welding of two half-shells (2a, 2b).

9. A water heater made of plastic, containing a main body (2), comprising two half-shells (2a, 2b), welded to form a body that is resistant to temperature and pressure, and the water heater also contains an outer casing (7), characterized in that two the half-shells (2a, 2b) and the outer casing are made of compatible and reusable thermoplastic materials, sorted from one set into the following groups:
group A - half-shells are made of a mixture of polyphenyl ether (PPE) and polystyrene (PS) reinforced with fiberglass, the outer casing is made of polystyrene (PS) (with mineral fillers);
group B - half-shells are made of a mixture of simple polyphenyl ether (PPE) and used polyamide (PA 6/6) reinforced with fiberglass, the outer casing is made of 6/6 polyamide (used PA) (with mineral fillers);
group C - half-shells are made of a mixture of polyphenyl ether (PPE) and polybutylene terephthalate (PBT) reinforced with fiberglass, the outer casing is made of polybutylene terephthalate (PBT) (with mineral fillers);
group D - half-shells are made of polyamide 6/6 (PA 6/6), reinforced with fiberglass, the outer casing is made of polyamide 6/6 (PA 6/6) (with mineral fillers);
group E - half-shells are made of polyethylene terephthalate (PET) reinforced with fiberglass, the outer casing is made of polyethylene terephthalate (PET) (with mineral fillers);
group F - half-shells are made of polypropylene (PP) reinforced with fiberglass, the outer casing is made of polypropylene (PP) (with mineral fillers).

10. A water heater made of plastic according to claim 9, characterized in that it comprises a heat-insulating layer located between two half-shells (2a, 2b) and the outer casing and made of a material compatible with the materials of the half-shells and the outer casing and sorted from one aggregates in the following groups corresponding to the material groups for half-shells and the outer casing:
group A - an insulating layer made of foamed polystyrene (foamed PS);
group B - the insulating layer is made of foamed polyamide 6/6 (foamed PA 6/6);
group C - an insulating layer made of foamed polybutylene terephthalate (foamed PBT);
group D - the insulating layer is made of foamed polyamide 6/6 (foamed PA 6/6);
group E - an insulating layer made of foamed polyethylene terephthalate (foamed PET);
group F - an insulating layer made of foamed polypropylene (foamed PP).

11. A water heater made of plastic according to claim 9, characterized in that the material of the half-shells (2a, 2b) contains fiberglass in an amount of 30% or more.

12. A water heater made of plastic according to claim 9, characterized in that the half-shells (2a, 2b) are subjected to operating pressures of approximately 8 bar and temperatures of up to 100 ^° C during operation, and the half-shells withstand pressures of up to 16 bar at a working pressure and are made from a material selected from the group consisting of: a mixture of polyphenyl ether (PPE) and polystyrene (PS) reinforced with fiberglass, a mixture of polyphenyl ether (PPE) and polyamide 6/6 (PA 6/6), reinforced with fiberglass, a mixture of simple polyphenyl ether (PPE) and polybutylene ereftalata (PBT), reinforced with fiberglass, polyamide 6/6 (RA 6/6), reinforced with fiberglass.

13. A water heater made of plastic according to claim 12, characterized in that the amount of fiberglass is equal to or greater than 30%.