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Electric heating device

A heater, liquid heater technology, applied in water heaters, air heaters, fluid heaters, etc., can solve the problems of large short-circuit danger, unfavorable power density, etc., and achieve large heat transfer device surface, simple contact, high The effect of power density

Inactive Publication Date: 2020-01-10
WEBASTO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A disadvantage in the case of conventional heaters with ceramic PTC elements is the complex manufacture of the ceramic PTC elements due to the more complex manufacture of the heat transfer device and the complex installation of the ceramic elements, which often require sorting of the ceramic elements due to manufacturing tolerances, in A relatively unfavorable power density occurs in the heating element-heat transfer device composite due to localized heat generation, a strong limitation of the maximum heating power due to the thickness of the PTC material (due to the limited heat release from the ceramic), and especially High risk of short circuits due to the close geometric spacing of components with high potential

Method used

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Embodiment Construction

[0070] figure 1 A schematic oblique view of an air heater according to the invention is shown. The electric air heater has a plurality (here specifically four, however this is not mandatory) of heating elements 9a to 9d. Corresponding intermediate spaces 16a to 16c are formed between the heating elements. Air can flow through the intermediate space to be heated. Furthermore, the individual heating elements 9 a to 9 d are spaced apart from one another by spacers 10 a , 10 b , 10 c arranged in the intermediate spaces 16 a to 16 c. exist figure 1 Exactly one spacer 10a, 10b, 10c is shown for each intermediate space 16a, 16b, 16c. However, it is also conceivable, for example, to provide two or more spacers. For example, it is also possible at the opposite edges of the intermediate spaces 16a to 16c (in figure 1 On the left edge of the middle) corresponding distance keeping devices are provided. Preferably, the spacer consists of an electrically conductive material, in parti...

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Abstract

The invention relates to an electric air heating device, in particular a liquid or air heating device, in particular for a motor vehicle, comprising a first heating element (9a) and at least one second heating element (9b), the heating elements (9a, 9b) respectively comprising one, in particular insulating substrate (18a-18d) and a polymer layer (14a, 14b) which contains a polymer component and aconductive component, in particular a carbon component. An intermediate space (16a), through which the fluid can flow for heating, is formed between the heating elements (9a, 9b). The heating elements(9a, 9b) are interconnected by one or more in particular conductive spacers (10c) which are arranged therebetween and / or one or more respective recesses and / or openings of the heating element penetrating, in particular conductive positioning elements (11a, 11b).

Description

technical field [0001] The invention relates to an electric heater, in particular for a motor vehicle, a method for producing the electric heater, a component for producing the heater, a method for operating the heater and the use of the heater. Background technique [0002] Electric heaters, especially those used in mobile applications, are usually based on ceramic heating elements with a large temperature-dependent electrical resistance, by means of which self-regulation of the heat release is possible. The resistor is usually a PTC element (PTC stands for Positive Temperature Coefficient: positive temperature coefficient). The PTC element is usually surface-connected to a heat transfer device made of an aluminum plate and is thus also electrically contacted. The PTC element comprises a PTC resistor, ie a temperature-dependent resistor with a positive temperature coefficient, which conducts electricity better at low temperatures than at high temperatures. [0003] A disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/22F24H3/04H05B3/14H05B3/22B60H1/00
CPCF24H1/103F24H1/121F24H1/202F24H3/04F24H3/0429H05B3/146F24H2250/04H05B2203/02H05B2203/021H05B2203/023H05B2214/04B60H1/2221B60H1/2225B60H2001/00128H05B3/22H05B3/26H05B3/50H05B3/20B60H2001/2271H05B3/565B60H1/2218H05B2203/017B29C45/0001B29C45/14639B29K2307/04B29K2995/0005B29L2031/779H05B3/18H05B3/286H05B2203/024F24H1/009H05B3/06H05B3/145H05B1/0236H05B3/82H05B2203/003
Inventor M·措斯克V·伊利琴科U·施特雷克尔B·迈尔N·格哈特M·施瓦内克
Owner WEBASTO AG