EP1296538A2 - Dispositif de chauffage, en particulier de chauffage d'espaces fermés de placards destinés à la protection d'instruments - Google Patents

Dispositif de chauffage, en particulier de chauffage d'espaces fermés de placards destinés à la protection d'instruments Download PDF

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Publication number
EP1296538A2
EP1296538A2 EP02017292A EP02017292A EP1296538A2 EP 1296538 A2 EP1296538 A2 EP 1296538A2 EP 02017292 A EP02017292 A EP 02017292A EP 02017292 A EP02017292 A EP 02017292A EP 1296538 A2 EP1296538 A2 EP 1296538A2
Authority
EP
European Patent Office
Prior art keywords
thermostat
electric heater
radiator
cable
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.)
Granted
Application number
EP02017292A
Other languages
German (de)
English (en)
Other versions
EP1296538B1 (fr
EP1296538A3 (fr
Inventor
Martin Hess
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 EP1296538A2 publication Critical patent/EP1296538A2/fr
Publication of EP1296538A3 publication Critical patent/EP1296538A3/fr
Application granted granted Critical
Publication of EP1296538B1 publication Critical patent/EP1296538B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0213—Switches using bimetallic elements
    • 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
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Definitions

  • the invention relates to an electrical heater, in particular for interior heating an instrument protection cabinet, according to the preamble of the claim 1.
  • a well-known, generic, electrical heater for heating the interior of an instrument protection cabinet consists of a radiator in the manner of a metallic Lamella blocks with a central receiving opening into which a heating element used and shed there.
  • the heating element becomes electrical Energy supplied via electrical connection lines, at least of which one via a thermostat in the manner of a bi-metal button thermostat is led.
  • the phase line wire is single-pole via the bi-metal button thermostat out and the zero wire is directly with the heating element connected. This requires a terminal box, from which each separate lines to the thermostat and to the heating element.
  • the bi-metal button thermostat is arranged in an encapsulated housing, which is attached to a mounting bracket, which in turn Silicone spacer is connected to the radiator. With this arrangement the thermostat detects the ambient temperature and above the thermally conductive Mounting bracket also a defined proportion of the radiator surface temperature. This measure is a control engineering D component generated, which causes the switching hysteresis and thus an undesirable or inadmissible overshoot of the temperature control above the setpoint be reduced. The characteristic values of the thermostat are only for one Arrangement with thermal coupling to the radiator observed.
  • the object of the invention is a generic electrical To create heating that works well and requires less installation is less expensive to manufacture with fewer components.
  • the electrical connection lines are in a single Connection cable included.
  • the thermostat is in this one connection cable as a bi-metal button thermostat, integrated and electrically connected.
  • the Thermostat is at a certain cable length distance from the radiator integrated in the connection cable. This cable length gap is called thermal Measure the coupling distance so that the connection cables pass through Heat conduction a defined proportion of the radiator heat to the thermostat to be led.
  • the thermostat thus records the ambient temperature and additionally the defined proportion of the radiator temperature as control technology D component.
  • the measures according to the invention are advantageous for this effect much easier and cheaper than the corresponding measures from the state of the art.
  • a terminal box and a mounting bracket, the associated terminals and connection means and the assembly effort required for this are eliminated. moreover the space requirement is reduced, the protection of the components against environmental influences and touch protection can be improved.
  • the thermal coupling distance that is, the distance of the installation location of the thermostat from the radiator essentially depends on the type of components used, in particular their thermal conductivity and the installation and operating conditions, and can be determined for specific implementation simply by appropriate tests.
  • a suitable cable length distance for the thermostat from the radiator of approx. 10 cm. It has been shown that this cable length spacing is not an exact critical variable and that the desired effect for reducing the switching hysteresis and for reducing overshoot around the setpoint value is achieved with good function with a relatively large tolerance range in the spacing.
  • a Multi-core connection cable is used, its external insulation at the installation site the thermostat is removed. There is the live phase line wire severed and the thermostat connected in between. The others Cores as neutral conductors and protective conductors are not separated and close to Thermostat housing around this, preferably in a system connection. On the one hand, this makes space-saving integration of the thermostat achieved in the course of the connection cable and, on the other hand, a good target Heat transfer through heat conduction from the line wires to the thermostats causes.
  • the electric heater according to the invention can be simplified in accordance with claim 6 Be carried out in an explosion-proof manner.
  • a fuse as an excess temperature fuse used with the heating element in the receiving opening of the radiator and shed.
  • the fuse is for intensive heat coupling directly in the heating element of the type a heating cartridge that can be inserted into the opening in the radiator integrated.
  • the thermostat should be under / or in the fully installed state lie next to the radiator. Just as in the version according to the state the technology, it is not appropriate to place the thermostat over the radiator to arrange, since then the specified thermal coupling for the desired Purpose of reducing hysteresis from too strong, direct Heat transfer between the radiator and thermostat can be superimposed and the thermostat detects excessive ambient temperature values from the outset.
  • Fig. 1 is an electrical heater 1 with a multi-core schematically Connection channel 2 shown.
  • a heating element 4 In a receiving opening 3 of a radiator 17 are a heating element 4 and a fuse 5 with the associated Potted connection lines 6.
  • the connecting cables 6 are guided outside the radiator 17 in a connecting cable 2.
  • a bi-metal button thermostat 7 In a thickening of the connection cable 2 is a bi-metal button thermostat 7 integrated. With the dimension arrow, the cable length distance 8 is defined, which is dimensioned as a thermal coupling distance.
  • FIG. 2 A longitudinal section through the connection cable 2 in the area of the bi-metal button thermostat 7 is shown in FIG. 2.
  • the location of the thermostat is External insulation of the three-wire connection cable 2 removed and the live Phase wire 9 is cut. In between is the bi-metal button thermostat 7 connected.
  • the zero wire 10 and the protective wire 11 are guided around the thermostat housing.
  • a protective tube is located over the installation location of the bi-metal button thermostat 7 12 inserted and poured with a potting compound 13.
  • strain reliefs 14 On both sides of the bi-metal button thermostat 7 are strain reliefs 14 for the subsequent ones Connection cable parts cast in. Additional protection is via bi-metal button thermostat 7 and the associated connection cable parts an outer Shrink tube 15 attached positively.
  • FIG. 4 shows a longitudinal section to FIG. 2 rotated by 90 °.
  • the view shows the routing of the zero line wire 10 and the protective line wire 11 around the bi-metal button thermostat 7 can be seen.
  • the phase line core 9 two flat contacts 16 are formed, via which the switching process of the bi-metal button thermostat 7 to the phase line wire is transmitted.
  • protective tube 12, casting compound 13, strain relief 14 and Shrink tube 15 also shown.
  • FIG. 5 is a perspective view of the connecting cable 2 with the integrated bi-metal button thermostat 7 shown.
  • the heating power of the electric heater 1 shown depends on the ambient temperature.
  • the heating power is regulated that via the bi-metal button thermostat 7, which is integrated in the connection cable 2 is.
  • the cable length spacing 8 i.e. the distance of the position of the bi-metal button thermostat 7 defined in the connecting cable 2 is the thermal coupling distance to see.
  • the installation location of the bi-metal button thermostat 7 opposite the radiator 17 essentially depends on the type of components used, in particular of their thermal conductivity as well as the installation and operating conditions from. By simple experiments, the one for a concrete Execution corresponding cable length distance 8 can be determined.

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  • Control Of Resistance Heating (AREA)
EP20020017292 2001-09-20 2002-08-01 Dispositif de chauffage, en particulier de chauffage d'espaces fermés de placards destinés à la protection d'instruments Expired - Lifetime EP1296538B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10146239 2001-09-20
DE2001146239 DE10146239A1 (de) 2001-09-20 2001-09-20 Elektrische Heizung, insbesondere zur Innenraumbeheizung eines Instrumenten-Schutzschranks

Publications (3)

Publication Number Publication Date
EP1296538A2 true EP1296538A2 (fr) 2003-03-26
EP1296538A3 EP1296538A3 (fr) 2006-11-02
EP1296538B1 EP1296538B1 (fr) 2012-12-26

Family

ID=7699591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020017292 Expired - Lifetime EP1296538B1 (fr) 2001-09-20 2002-08-01 Dispositif de chauffage, en particulier de chauffage d'espaces fermés de placards destinés à la protection d'instruments

Country Status (2)

Country Link
EP (1) EP1296538B1 (fr)
DE (1) DE10146239A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2339261A3 (fr) * 2009-12-23 2014-08-27 Gruppo Ragaini S.p.A. Radiateur électrique ayant une résistance tubulaire
US20160370813A1 (en) * 2015-06-19 2016-12-22 Phillips & Temro Industries Inc. Thermostat Assembly and Method of Manufacturing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009020457B4 (de) 2009-05-08 2011-05-19 Martin Hess Verfahren und Anordnung zur Regulierung der Temperatur in einem Innenraum eines Gehäuses, insbesondere einem Instrumentenschutzkasten, für elektrische Komponenten sowie Gehäuse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497677A (en) * 1968-03-04 1970-02-24 Elevator Equip Electric heater unit for liquid reservoirs
US4641121A (en) * 1985-11-04 1987-02-03 Texas Instruments Incorporated Sealed electrical switch and mounting therefor
DE3633682A1 (de) * 1986-10-03 1988-04-14 Hess Joachim Heizblock zur beheizung von ventilbloecken und messgeraeten
US5081339A (en) * 1990-06-01 1992-01-14 Sunbeam Corporation Water bed heater
DE29501186U1 (de) * 1995-01-26 1996-05-30 Paechter, Barbara, 70565 Stuttgart Unterlage für Tiere
DE19754158A1 (de) * 1997-10-28 1999-05-12 Marcel Hofsaes Verfahren zum Isolieren eines elektrischen Bauteiles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2339261A3 (fr) * 2009-12-23 2014-08-27 Gruppo Ragaini S.p.A. Radiateur électrique ayant une résistance tubulaire
US20160370813A1 (en) * 2015-06-19 2016-12-22 Phillips & Temro Industries Inc. Thermostat Assembly and Method of Manufacturing

Also Published As

Publication number Publication date
EP1296538B1 (fr) 2012-12-26
DE10146239A1 (de) 2003-04-24
EP1296538A3 (fr) 2006-11-02

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