Electric heating device
AssigneeEberspächer catem GmbH & Co. KG
InventorsKurt Walz, Michael Niederer, Ahmad Asafi, Patrick Kachelhoffer
Life of this patent
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Abstract
An electric heating device, in particular for a motor vehicle, includes a housing which has an inlet and outlet opening for a medium to be heated and which encloses a layered structure. The layered stricture comprises at least one PTC element which is electrically conductively connected to conducting elements leading to connections of different polarity, and heat-emitting elements that are conductively connected on both sides to the PTC element. In order to provide improved heat dissipation, the heat-emitting elements include a panel element that is provided with perforations and that is made of a heat-conducting material.
Claims18
An electric heating device for a motor vehicle, comprising:
- a housing having an inlet opening and an outlet opening for a medium to be heated, wherein
- the housing encloses a layered structure comprising at least one PTC element which is electrically conductively connected to connections of different polarity, and which comprises heat-emitting elements that are heat conductively connected on opposed sides to the PTC element;
- wherein the heat-emitting elements include a panel element that is provided with perforations in the form of a mesh wire or an expanded metal or a perforated sheet and that is made of heat-conducting material, wherein the perforations are distributed throughout the entire panel element at a regular interval with no space among them;
- and
- wherein each of the heat-emitting elements is formed of at least one track of the perforated panel element, which track is meanderingly bent;
- and
- wherein the panel element forms each heat-emitting element and a conducting element which electrically conductively abuts the PTC element.
An electric heating device for a motor vehicle, comprising:
- a housing having an inlet opening and an outlet opening for a medium to be heated, wherein
- the housing encloses a layered structure comprising at least one PTC element which is electrically conductively connected to connections of different polarity, and which comprises heat-emitting elements that are heat conductively connected on opposed sides to the PTC element, wherein
- the heat-emitting elements include a panel element that is provided with perforations in the form of a mesh wire or an expanded metal or a perforated sheet and that is made of heat-conducting material, wherein
- the perforations are distributed throughout the entire panel element at a regular interval with no space among them, wherein
- the panel element is bent so that it has main side surfaces and a web that extends perpendicular thereto and that connects between two of the main side surfaces, and wherein
- the panel element forms each heat-emitting element and a conducting element which electrically conductively abuts the PTC element.
An electric heating device for a motor vehicle, comprising:
- a housing having an inlet opening and an outlet opening for a medium to be heated, wherein
- the housing encloses a layered structure comprising at least one PTC element which is electrically conductively connected to connections of different polarity, and which comprises heat-emitting elements that are heat conductively connected on opposed sides to the PTC element;
- wherein the heat-emitting elements include a panel element that is provided with perforations in the form of a mesh wire or an expanded metal or a perforated sheet and that is made of heat-conducting material, wherein the perforations are distributed throughout the entire panel element at a regular interval with no space among them;
- and
- wherein each of the heat-emitting elements is formed of at least one track of the perforated panel element, which track is meanderingly bent;
- wherein main side surfaces of the meanderingly bent track are connected to one another via webs which are arranged in two planes lying parallel to a heat-emitting main side surface of the PTC element;
- and
- wherein the webs are arranged side by side in a direction transverse to a direction of penetration of the medium to be heated.
Dependencies are inferred from the claim text.