Vehicle heater and method for producing a vehicle heater

Patent metadata

Field	Value
Publication number	US-10555378-B2
Application number	US-201314379087-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Feb 16, 2012
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A vehicle heater comprises a main body carrying a non-intrinsically safe heat conductor layer, and a sensor device allocated to the heat conductor layer and provided to detect an exceedance of a temperature threshold value. The sensor device comprises a sensor layer arranged on the side of the heat conductor layer facing away from the main body which is monitored for current flows which may occur substantially in the direction of its surface normal. In a method for producing a vehicle heater a main body of the vehicle heater is equipped with a non-intrinsically safe heat conductor, and a sensor device for detecting exceedances of a temperature threshold value. A sensor layer provided to be monitored for current flows which may occur substantially in the direction of the surface normal of the sensor layer is allocated to the heat conductor layer on its side facing away from the main body to form the sensor device.

First claim

The invention claimed is:

1. A vehicle heater comprising:
a main body having a non-intrinsically safe heat conductor layer;
a sensor device proximal the heat conductor layer and detecting an exceedance of a temperature threshold value, the sensor device including a sensor layer arranged on a side of the heat conductor layer facing away from the main body; and
a measuring device monitoring only current flows through the sensor layer substantially in a direction of a surface normal of the sensor layer.

2. The vehicle heater according to claim 1 , in which the sensor layer is a thermal sprayed layer.

3. The vehicle heater according to claim 1 , in which the sensor layer has, at least in sections, a resistance or impedance characteristic involving a negative temperature coefficient.

4. The vehicle heater according to claim 1 , in which the sensor layer includes, at least in sections, an insulating layer through which a current flow having substantially the direction of its surface normal will only occur in case of disruptive discharges or electric arc formation.

5. The vehicle heater according to claim 1 , in which the sensor layer includes a lower contact layer and an upper contact layer.

6. A method for producing a vehicle heater, having a main body of the vehicle heater is provided with a non-intrinsically safe heat conductor layer, and a sensor device for detecting exceedances of a temperature threshold value, said method comprising:
applying a sensor layer forming part of the sensor device onto a side of the heat conductor layer facing away from the main body; and
providing a measuring device monitoring the sensor layer only for current flows substantially in a direction of a surface normal of the sensor layer.

7. The method according to claim 6 , in which the sensor layer is formed with the aid of a thermal spraying method.

8. The method according to claim 6 , in which the sensor layer is, at least in sections, provided with a resistance or impedance characteristic involving a negative temperature coefficient.

9. The method according to claim 6 , in which the sensor layer is, at least in sections, formed as an insulating layer through which a current flow having substantially the direction of its surface normal will only occur in case of disruptive discharges or electric arc formation.

10. The method according to claim 6 , in which the sensor layer is disposed between a lower contact layer and an upper contact layer.

Assignees

• Bytzek Dietmar
• Kabelitz Thorsten
• Goettl Karl
• Eckert Daniel
• Webasto SE

Inventors

• Bytzek Dietmar
• Kabelitz Thorsten
• Goettl Karl
• Eckert Daniel

Classifications

• H05B2203/023

  Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system · CPC title

• H05B3/262 Primary

  the insulating base being an insulated metal plate · CPC title

• H05B2203/003

  using serpentine layout · CPC title

• H05B2203/01

  Heaters comprising a particular structure with multiple layers · CPC title

• Y10T29/49083

  Heater type · CPC title