EP0052230A2 - Dispositif de chauffage électrique pour machines de traitement industriel en général - Google Patents
Dispositif de chauffage électrique pour machines de traitement industriel en général Download PDFInfo
- 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- Withdrawn
Links
- 238000012994 industrial processing Methods 0.000 title claims abstract description 11
- 239000010453 quartz Substances 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000012546 transfer Methods 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims 2
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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)
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 (fr) | 1982-05-26 |
EP0052230A3 EP0052230A3 (fr) | 1982-06-16 |
Family
ID=11218286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81108229A Withdrawn EP0052230A3 (fr) | 1980-11-13 | 1981-10-12 | Dispositif de chauffage électrique pour machines de traitement industriel en général |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0052230A3 (fr) |
IT (1) | IT1134264B (fr) |
Cited By (2)
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)
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 |
-
1980
- 1980-11-13 IT IT25963/80A patent/IT1134264B/it active
-
1981
- 1981-10-12 EP EP81108229A patent/EP0052230A3/fr not_active Withdrawn
Patent Citations (6)
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)
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 |
---|---|
IT8025963A0 (it) | 1980-11-13 |
EP0052230A3 (fr) | 1982-06-16 |
IT1134264B (it) | 1986-08-13 |
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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 |