PTC heating element and electric heating device comprising such PTC heating element and method for producing PTC heating element
A technology of PTC elements and electric heating devices, applied in the direction of heating elements, electric heating devices, heating element shapes, etc., can solve the problems of increased length of PTC heating elements, complex production, etc., and achieve the effect of improving leak tightness
Active Publication Date: 2020-10-30
EBERSPACHER CATEM
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Problems solved by technology
[0004] These two previously known solutions of PTC heating elements have the disadvantage that the tube needs to be closed on one side, whereby the length of the PTC heating element increases more than necessary
In addition to complex production, this solution has the disadvantage that the medium to be heated can reach the conductive parts between the frame and the surface of the insulating layer
Method used
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Embodiment Construction
[0046] figure 1 Shown is a top perspective view of a heating housing of an electric heating device formed as a water heater, which is designated with the reference number 2 . The heating housing 2 has a housing barrel element 4 made of plastic. The heating housing 2 forms an inlet port 6 and an outlet port 8 which are now integrally formed on the housing barrel element 4 . The ports 6 , 8 are designed as hose connection ports and form an inlet opening 10 and an outlet opening 12 , each leading to a circulation chamber designated with reference numeral 14 .
[0047] The circulation chamber 14 is separated from the connection chamber 18 and sealed off by a partition wall 16 made of plastic material. The partition wall 16 forms a female plug element holding fixture 20 for a PTC heating element 22 inserted into the female plug element holding fixture 20 and supported on a base 24 of the housing barrel element 4 .
[0048] Figure 3 to Figure 9 A detail of a PTC heating element...
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The invention relates to a PTC heating element (22) for an electric heating devce, and electric heating device comprising such PTC heating element (22) and method for producing PTC heating element (22). A PTC heating element (22) has a casing (72) that joins as a unit at least one PTC element (30), conductor paths (38) electrically connected to the PTC element (30), and insulating layers (34) bearing, in a heat-conductive manner against the PTC element (30). The PTC heating element (30) also has contact strips (42) which project over itself and which are electrically conductively connected tothe conductor paths (38) for energizing the PTC element (30) with different polarities. In order to improve heat decoupling from the PTC element, the receptacle (78), in a cross-sectional view, is defined by two oppositely disposed inner surfaces (88) covering the PTC element (30) and concave cavities, adjoining the inner surfaces (88) and forming the longitudinal edges (88) of the casing (72).
Description
technical field [0001] The invention relates to a PTC heating element for an electric heating device. The PTC heating element according to the invention has: a housing, to which at least one PTC element is connected; a conductor path electrically connected to the PTC element; and an insulating layer, which rests integrally against the PTC element in a thermally conductive manner , and the PTC heating element has contact strips projecting on itself that are conductively connected to the conductor paths to energize the PTC element with different polarities. Background technique [0002] Such a PTC heating element is known, for example, from EP2190256A1. The PTC heating element has a frame comprising frame openings extending through the frame, in each frame opening at least one PTC element is accommodated, the PTC element being provided on both sides with contact plates forming conductor paths. The insulating layer is against the side opposite to the PTC element. These eleme...
Claims
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IPC IPC(8): H05B3/04H05B3/06
CPCH05B3/04H05B3/06H05B3/50H05B2203/02H05B2203/021F24H2250/04F24H9/1827F24H9/02F24H1/009F24H3/0411F24H1/121
Inventor 库尔特·瓦尔茨迈克尔·尼德雷尔鲁迪格·弗赖塔格
Owner EBERSPACHER CATEM