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US 8,680,435 B2Granted
Electrical heating device
AssigneeCatem GmbH & Co. KG
InventorsFranz Bohlender, Michael Niederer, Michael Zeyen, Rainer Wuenstel, Detlef Stephan
Life of this patent
Estimating the term…
Abstract
An electrical heating device includes a flat heating block, which is held in a housing forming oppositely situated frame openings and which comprises parallel layers of heat dissipating and heat generating elements. The heat generating elements on the face side have fitting elements projecting beyond the heating block, and fitting element receptacles assigned to these fitting elements are formed on the housing. The fitting elements and the assigned fitting element receptacles of different heat generating elements are formed such that the heat generating elements cannot be inserted at just any random place in the housing.
Claims15
An electrical heating device comprising:
- a flat heating block, which is held in a housing forming oppositely situated frame openings and which comprises parallel layers of longitudinally extending heat dissipating and heat generating elements, wherein
- each of the heat generating elements has at least one PTC-heating element, sheet metal bands which contact opposite side surfaces of the at least one PTC-heating element, and a fitting element;
- wherein
- a plurality of fitting element receptacles is formed on the housing, wherein each of the fitting element receptacles is assigned to and receives a corresponding one of the fitting elements, wherein each fitting element is introduced into the assigned fitting element receptacle, and wherein
- at least one of the fitting element receptacles is formed with at least one of a different length in the longitudinal direction of the heat generating elements and a different width in a direction transverse to the heat generating elements than at least one other of the fitting element receptacles.
2 more elements
An electrical heating device comprising:
- a flat heating block comprising parallel layers of heat dissipating and heat generating elements, each of the heat generating elements having a fitting element,
- a housing on which is formed a plurality of fitting element receptacles, each of which is associated with and receives a corresponding one of the fitting elements, the housing forming oppositely situated frame openings, wherein the housing comprises a housing lower part, which forms a receptacle for the heating block and a frame surrounding the receptacle as well as the fitting element receptacles, and a housing upper part, which is joined to the housing lower part to enclose the heating block,
- wherein the heat generating elements comprise at least one PTC-heating element and sheet metal bands to which the PTC-heating elements make electrical contact, wherein the sheet metal bands on the face side of the heating block are brought out of the plane of the associated heat generating element by bending and are passed through slots which are cut in the face side of the housing, and wherein the bent sheet metal bands of different heat generating elements and the associated slots are formed such that the heat generating elements cannot be inserted at just any random place in the housing,
- wherein the housing upper part has guide pins which project from a cover of the housing upper part enclosing the heating block, which are formed with it in a single part, and which are in engagement with pin guides which are cut out correspondingly on the housing lower part, wherein the guide pins and the pin guides are foliated correspondingly on both housing parts such that the two housing parts can only be joined together with a particular alignment,
- further comprising at least one spring element accommodated in the housing, through which the heating block is held under pretension in the housing,
- and wherein the housing lower part forms locating faces for the at least one spring element, which run exclusively parallel or perpendicular to the plane comprising the frame opening.
3 more elements
An electrical heating device comprising:
- a fiat heating block which is held in a housing forming oppositely situated frame openings and which comprises parallel layers of heat dissipating and heat generating elements, wherein
- each of the heat generating elements has at least one PTC-heating element, sheet metal bands which contact opposite side surfaces of the at least one PTC-heating element, and a fitting element;
- wherein
- a plurality of fitting element receptacles is formed on the housing, wherein
- each of the fitting element receptacles is assigned to and receives a corresponding one of the fitting elements, wherein each fitting element is introduced into the assigned fitting element receptacle, wherein
- the fitting elements and the corresponding fitting element receptacles are formed such that the heat generating elements cannot be inserted at just any random place in the housing, and wherein
- sheet metal bands make electrical contact with the PTC heating elements of the heat generating elements and, on a face side of the heating block, are brought out of the plane of the associated heat generating element by bending, and wherein the sheet metal bands pass through slots which are cut in a face side of the housing, and wherein the bent sheet metal bands of different heat generating elements and the associated slots are formed such that the heat generating elements cannot be inserted at just any random place in the housing.
4 more elements
An electrical heating device comprising:
- a fiat heating block which is held in a housing forming oppositely situated frame openings and which comprises parallel layers of heat dissipating and heat generating elements, wherein
- each of the heat generating elements has at least one PTC-heating element, sheet metal bands which contact opposite side surfaces of the at least one PTC-heating element, and a fitting element;
- wherein
- a plurality of fitting element receptacles is formed on the housing, wherein
- each of the fitting element receptacles is assigned to and receives a corresponding one of the fitting elements, wherein each fitting element is introduced into the assigned receptacle,
- the fitting elements and the corresponding fining element receptacles are formed such that the heat generating elements cannot be inserted at just any random place in the housing, and wherein
- the fitting element of one of the heat generating elements and the corresponding fitting element receptacle are collectively of a different geometry than the fitting element of another of the heat generating elements and a corresponding fitting element receptacle.
4 more elements
An electrical heating device comprising:
- a housing which forms oppositely situated frame openings and which a plurality of fitting element receptacles formed thereon;
- a heating block which comprises parallel layers of heat dissipating and heat generating elements, each of which has a fitting element,
- wherein the housing defines a receptacle accommodating the heating block,
- wherein the fitting element receptacles are open to the receptacle accommodating the heating block,
- wherein each heat generating element comprises at least one PTC-heating element and sheet metal bands which contact opposite side surfaces of the PTC heating elements,
- wherein each of the fitting element receptacles is assigned to and receives a corresponding one of the fitting elements, and wherein the fitting element of one of the heat generating elements and the corresponding fitting element receptacle are collectively of a different geometry than the fitting element of another of the heat generating elements and a corresponding fitting element receptacle so that the heat generating elements cannot be inserted at just any random place in the housing.
3 more elements
An electrical heating device comprising:
- a housing which forms oppositely situated frame openings and which has a plurality of fitting element receptacles formed thereon;
- a heating block which comprises parallel layers of heat dissipating and heat generating elements, each of which has a fitting element,
- wherein the housing defines a receptacle accommodating the heating block,
- wherein the fitting element receptacles are open to the receptacle accommodating the heating block,
- wherein each heat generating element comprises at least one PTC-heating element, sheet metal bands which contact opposite side surfaces of the PTC-heating elements, and a positional frame providing a receptacle for the at least one PTC-heating element,
- wherein the heat generating element is formed as a preassembled component,
- wherein each of the fitting element receptacles is assigned to and receives a corresponding one of the fitting elements, and wherein the fitting element of one of the heat generating elements and the corresponding fitting element receptacle are collectively of a different geometry than the fitting element of another of the heat generating elements and a corresponding fitting element receptacle so that the heat generating elements cannot be inserted at just any random place in the housing.
4 more elements
Dependencies are inferred from the claim text.