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
  • F24H1/185—Water-storage heaters using electric energy supply
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor

Definitions

• the present invention relates to a rigid container, such as a tank, cistern or other open or closed vessel, which is made of synthetic material and is intended for storing, heating, and sustaining the temperature of a fluid, and which incorporates electrical resistance wires or filaments which can be connected to a source of electric current via elec ⁇ trodes.
• a rigid container such as a tank, cistern or other open or closed vessel, which is made of synthetic material and is intended for storing, heating, and sustaining the temperature of a fluid, and which incorporates electrical resistance wires or filaments which can be connected to a source of electric current via elec ⁇ trodes.
• a container of the aforedescribed kind would be universally useful and able to replace many kinds of metal or synthetic-material containers at present used for varying purposes.
• Containers made of synthetic materials have not been used widely for fluids which require a constant, temporary or variable supply of heat, inter alia, because of the risk that the material will become electrically conductive; because of the possible risk of fire or explosion caused, inter alia, by static electricity, when the vessel contains inflammable liquids; and because it has not been possible hitherto to solve satisfactorily the problem of electrically insulating the container.
• a container made of synthetic material could fully replace vehicle fuel tanks, not only tanks for diesel oil but also tanks for petrol or other liquid fuels.
• Containers intended for use in other fields, or even metal tanks and cisterns, could be replaced with containers made of synthetic materials, provided that the technical problems can be solved.
• the basic concept of the invention is to provide a container of the kind described in the preamble which can be used universally, even for inflammable liquids.
• a container constructed in this way can be used as a container for the windscreen washing liquid of an automotive vehicle, thereby eliminating the need to use special-duty washing liquid agents.
• the necessary sypply of heat to the container can be effected through the agency, e.g., of the vehicle battery, which serves as the current source.
• the inventive container can also replace the fuel tank of a diesel-engine vehicle or the storage tanks for diesel or other oils. Because the base material from which the container is made is electrically conductive but will not generate static electricity, the heat required can be supplied by transfo ⁇ ing down the mains voltage, or from a vehicle battery.
• the insulating layer comprises a material known as ISOFIBER STRUCTURE, which originated in Norway and is retailed by Svelvik Fiber A/S, Norway, and which constitutes an essential part of the invention, since this layer practically excludes the possibility of heat leaking to the surroundings, thereby ensuring that the smallest amount of current possible is taken from the power source.
• the outer surface of the insulating layer is conveniently coated with a further material, e.g. PVC, capable of forming a first protection means against, for instance, the impact gravel or the like from the road surface.
• Washing machine drums, tumbler-dryer drums and tanks for water heaters are all examples of containers in which metallic material has hitherto been used but in which a container constructed in accordance with the invention would provide a good substitute.
• a three-phase alternating current is generally used, and to eliminate the risk of such machines becoming electrically conductive, the inner surfaces of the base material, i.e. Semicon CT 6011:70, should be coated with an electrically insulating but heat-permeable
• the layer of insulating material .applied externally on the container material, mainly the material sold under the designation Isofiber Struktur and sold, inter alia, Svelvik
• L5 Fiber- A/S Svelvik, Norway, is fireproof and can also be exposed externally to flames without risk to the contents of container, even should these contents be inflammable.
• the insulating material is, furthermore, a very effectibe insula ⁇ ting material, thereby enabling heat lossed from the container
• the material is also resistant, e.g., to attack by mold.
• a container which is manufactured in accordance with the invention will need practically no maintenance, with the exception of those faults which possibly occur in the current source.
• the single figure of the accompanying drawing is a longitudi ⁇ nal sectioned view of an exemplifying embodiment of a tank constructed in accordance with the invention, namely a fuel tank for a diesel-driven motor vehicle.
• the container When seen from outside, the container, or tank, comprises, for instance, a PVC-layer 10, inwardly of which there is applied an insulating layer 11, designated "Isofiber Struktur", the thickness of which will vary in dependence on the use for which the container is intended. Finally, there is applied on the inner surfaces of the layer 11 a further layer of material 12, designated Semicon CT 6011:70, which is an electrically conductive material and which encapsulates fully protected resistance wires or filaments, thus having properties which are known per se.
• a PVC-layer 10 inwardly of which there is applied an insulating layer 11, designated "Isofiber Struktur", the thickness of which will vary in dependence on the use for which the container is intended.
• a further layer of material 12 designated Semicon CT 6011:70, which is an electrically conductive material and which encapsulates fully protected resistance wires or filaments, thus having properties which are known per se.
• the container material 12 is connected via electrodes to a current source (not shown) in a manner well known to the skilled person, said current source either being a conventio- nal mains supply, optionally transformed to a lower voltage level, or having the form of at least one conventional 12 volt battery.
• the inventive container is of simple construction, it affords a surprising technical effect within, inter alia, the aforesaid fields. Compared with container types known hitherto, the manufacturing costs are significantly lower. Although the materials utilized in producing the composite container structure are each known per se, it is not believed, or known, that, the concept of combining these 'two materials for the purpose of achieving the aforedescribed unique results have been previously realized.

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)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20368618

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (1)

Citations (2)

• 1987
  • 1987-05-22 SE SE8702144A patent/SE460631B/sv not_active IP Right Cessation
• 1988
  • 1988-05-20 AU AU19426/88A patent/AU1942688A/en not_active Abandoned
  • 1988-05-20 WO PCT/SE1988/000262 patent/WO1988009595A1/en active IP Right Grant
  • 1988-05-20 EP EP19880905018 patent/EP0362263B1/en not_active Expired - Lifetime
  • 1988-05-20 DE DE3886402T patent/DE3886402T2/de not_active Expired - Fee Related

Patent Citations (2)

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