EP0052230A2 - Elektrische Heizvorrichtung für industrielle Verarbeitungsmaschinen im allgemeinen - Google Patents

Elektrische Heizvorrichtung für industrielle Verarbeitungsmaschinen im allgemeinen Download PDF

Info

Publication number
EP0052230A2
EP0052230A2 EP81108229A EP81108229A EP0052230A2 EP 0052230 A2 EP0052230 A2 EP 0052230A2 EP 81108229 A EP81108229 A EP 81108229A EP 81108229 A EP81108229 A EP 81108229A EP 0052230 A2 EP0052230 A2 EP 0052230A2
Authority
EP
European Patent Office
Prior art keywords
electric heater
electric
heated
region
heater according
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.)
Withdrawn
Application number
EP81108229A
Other languages
English (en)
French (fr)
Other versions
EP0052230A3 (de
Inventor
Antonio Petrelli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0052230A2 publication Critical patent/EP0052230A2/de
Publication of EP0052230A3 publication Critical patent/EP0052230A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H05B3/40—Heating elements having the shape of rods or tubes

Definitions

  • This invention relates to an electric heater for industrial processing machinery in general.
  • Conventional electric heaters generally comprise a band element which is applied to contact the region to be heated and supplies heat to a part of .interest mainly by conduction.
  • This type of heaters although widely employed, have the disadvantage that it cannot ensure any. accurate and perfect distribution of temperature over the area to be heated because the points of contact between the resistor in band form and the area to be heated are unavoidably limited so that there occur areas where heat is better transmitted than at areas where a very thin layer of intervening air greatly deteriorates such delivery of heat.
  • a further problem is that, since heat cannot be supplied in large amounts, in many cases the operating capacity of the machine equipped with said resistor is also affected, thus cutting down the working time and rate.
  • Another object of this invention is to provide an electric heater which, in addition to involving extremely quick and simplified assembling procedures, can be quite safe and reliable in use.
  • a not unimportant object of the invention is to provide an electric heater which can be easily manufactured from readily available elements and materials, and which can be highly competitive even from a purely economical standpoint.
  • an electric heater for industrial processing machinery in general, characterized in that it comprises a supporting housing adapted for association with a region to be heated of an industrial processing machine, said supporting housing being provided, on the side thereof facing said region to be heated, with a plurality of electric resistors operative to transfer heat to said region to be heated mainly by radiation.
  • the electric heater for industrial processing machinery in general, as generally designated with the reference numeral 1, comprises a supporting housing which is generally configured to match the shape of the egion to be heated whereto the heater 1 is to be applied.
  • the supporting housing comprises first and second half-bodies 2 and 3 substantially similar to-each other and shaped to conform to a semicylindrical surface, for matching the electric heater to a region to be heated of cylindrical configuration.
  • Each half-body, 2 and 3 has a semicylindrical internal surface 4 and semicylindrical external surface 5 which is conveniently spaced apart from the internal surface to create an interspace effective, as will be explained hereinafter, to limit the waste of heat to the environment.
  • the inner surface 4 and outer surface 5 are interconnected by spacers 6 conveniently, but not necessarily, comprising small perforated disks of steatite or any other material which be a good electric insulator as well as thermal insulator.
  • thermal insulator adapted to further improve the prevention of heat waste to the environment.
  • the surface 5 is completed, at the ends thereof, with a flange 8 facing radially inwardly toward the center, which serves the function of a bearing and centering element for the heater 1 relatively to the region to be heated.
  • the inner surface 4 will have a mirror-like finish on its side facing the region to be heated.
  • a plurality of electric resistors which may be connected, depending on contingent requirements, either in series or parallel with one another, and a peculiar feature of the invention is that the electric resistors provided on one half-body are fed independently from the electric resistors provided on the other half-body, in order to avoid the presence of electric leads led past the hinge area 9 which unites the two half-bodies 2 and 3 together.
  • each half-body is advantageously implemented through conductive plates 10 which are associated with the surface 4 by means -of spacers 11, also in the form of small perforated disks acting as electric insulators for the plates 10 relatively to the surface 4.
  • Each electric resistor comprises a coil element contained in quartz tubes 20 which have fairleads 21 of an electrically insulating material at their ends, and are carried on angle brackets 22 having on one flange or leg a throughgoing hole 23 for coupling to . the fairleads,and on the other flange a fork-like element 24 for electric connection to the plate 10.
  • This type of connection is highly advantageous, in that it affords adequate support to each resistor while allowing a quick and easy replacement where the electric resistor is damaged or burned out.
  • the number and type of the electric resistors being utilized may be varied in accordance with the heating levels to be achieved, bearing in mind that the resulting heat application is a direct function of the applied electric power.
  • Each half-body 2 and 3 is provided, on its outer surface, with a connector 30, of a type known per se, for connection to the power supply electric cables.
  • a peculiar characteristic of the invention is that the transfer of heat to the region to be heated is mainly effected by-radiation from the individual resistors to the part to be heated, without any direct contact between the resistors and region or surface to be heated.
  • the surface 4 being treated to a mirror finish, will act as an additional reflector element for the direct transfer of heat to the surface to be heated.
  • the transfer of heat will occur in the infrared band, as it has been found that the best heat transfer coefficients are obtained by adopting for the resistors suitable temperature levels to produce the emission of infrared rays.
  • closure ties 50 which permit an accurate clamping of the resulting enclosure onto the part to be heated.
  • the shape of the housing or enclosure will be modified each time to fit the configuration of the region to be heated, it having as its sole characteristic that of presenting a configuration substantially matching that of the region to be heated.
  • the electric power supplied to the resistors produces an immediate transfer of heat, thus cutting down the thermal flywheels normally associated with heaters of known design.
  • the transfer of heat by radiation affords a uniform distribution of the temperature levels over the region being heated, which levels may even reach very high values, thus bringing about the advantage of an accurate control of the temperature of the region being heated as well as of a perfect distribution, which considerably facilitates the effectuation of the operations to be carried'out on the machine incorporating this heater.
  • the materials used if compatible with specific requirements, and the dimensions and contingent shapes may be any selected ones to fit individual applicational requirements.

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Resistance Heating (AREA)
EP81108229A 1980-11-13 1981-10-12 Elektrische Heizvorrichtung für industrielle Verarbeitungsmaschinen im allgemeinen Withdrawn EP0052230A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT25963/80A IT1134264B (it) 1980-11-13 1980-11-13 Riscaldatore elettrico per macchine per lavorazioni industriali in genere
IT2596380 1980-11-13

Publications (2)

Publication Number Publication Date
EP0052230A2 true EP0052230A2 (de) 1982-05-26
EP0052230A3 EP0052230A3 (de) 1982-06-16

Family

ID=11218286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108229A Withdrawn EP0052230A3 (de) 1980-11-13 1981-10-12 Elektrische Heizvorrichtung für industrielle Verarbeitungsmaschinen im allgemeinen

Country Status (2)

Country Link
EP (1) EP0052230A3 (de)
IT (1) IT1134264B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7133606B1 (en) * 2005-02-11 2006-11-07 Elliott Daniel F Pipe heating assembly with hingedly attached light emitters
CN100451456C (zh) * 2006-05-30 2009-01-14 杨存斌 一种安在多功能电炉上的炉体结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426976A (en) * 1945-07-27 1947-09-02 Francis L Taulman Pipe thawing device
GB1002679A (en) * 1961-11-21 1965-08-25 British Iron Steel Research Improvements in or relating to furnaces
US3482080A (en) * 1967-11-13 1969-12-02 William J Kassen Heater assembly
DE1565390B1 (de) * 1965-07-06 1970-09-24 Aerojet General Co Ofen zum Hartloeten oder Schweissen
US3735008A (en) * 1970-03-20 1973-05-22 Kokusai Electric Co Ltd Electric furnace
US3804967A (en) * 1972-10-13 1974-04-16 Sola Basic Ind Inc Rectangular tube diffusion furnace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426976A (en) * 1945-07-27 1947-09-02 Francis L Taulman Pipe thawing device
GB1002679A (en) * 1961-11-21 1965-08-25 British Iron Steel Research Improvements in or relating to furnaces
DE1565390B1 (de) * 1965-07-06 1970-09-24 Aerojet General Co Ofen zum Hartloeten oder Schweissen
US3482080A (en) * 1967-11-13 1969-12-02 William J Kassen Heater assembly
US3735008A (en) * 1970-03-20 1973-05-22 Kokusai Electric Co Ltd Electric furnace
US3804967A (en) * 1972-10-13 1974-04-16 Sola Basic Ind Inc Rectangular tube diffusion furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7133606B1 (en) * 2005-02-11 2006-11-07 Elliott Daniel F Pipe heating assembly with hingedly attached light emitters
CN100451456C (zh) * 2006-05-30 2009-01-14 杨存斌 一种安在多功能电炉上的炉体结构

Also Published As

Publication number Publication date
IT1134264B (it) 1986-08-13
EP0052230A3 (de) 1982-06-16
IT8025963A0 (it) 1980-11-13

Similar Documents

Publication Publication Date Title
US3675449A (en) Steaming apparatus with removable brush
US5077460A (en) Heatable turntable
US4334141A (en) Combined electric water heating and vessel support plate for a beverage preparation device
US4327280A (en) Smooth top cookers
US4393299A (en) Electric radiant heater unit for a glass ceramic top cooker
US4665301A (en) Heated insert for boots
US4876436A (en) PTC air heater employing triangular PTC heating elements
BE901415A (fr) Appareil de chauffage pour postes de chauffage par rayonnement chauffes par energie electrique.
ES2016337B3 (es) Electrodomestico automatico para hacer queso y derivados del mismo.
US4430558A (en) Electric radiant heater unit for a glass ceramic top cooker
US2963565A (en) Heater for animal pens
EP0692189A1 (de) Verbesserter elektronischer Tauchsieder
EP0052230A2 (de) Elektrische Heizvorrichtung für industrielle Verarbeitungsmaschinen im allgemeinen
US4508961A (en) Electric radiant heater units for glass ceramic top cookers
US2527864A (en) Heating device for curved-wall containers
GB2087698A (en) Electric radiant heater unit
WO1997002054A1 (en) Heater with ptc heating elements for evaporators of solid or liquid insecticides or deodorants
US2244580A (en) Electrical heating vessel
US4806738A (en) Electric plate
DE3065318D1 (en) Electric storage heater
GB1574167A (en) Cooking apparatus
US3632963A (en) Footwear-heating mold
US2666127A (en) Bottle warmer
FR2400302A1 (fr) Multicuiseur
EP1545194B1 (de) Tauchsiedervorrichtung für aquarien und dergleichen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT CH DE FR GB

AK Designated contracting states

Designated state(s): AT CH DE FR GB

RHK1 Main classification (correction)

Ipc: H05B 3/44

17P Request for examination filed

Effective date: 19821222

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850501