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Heating device, in particular for a motor vehicle air conditioning device

A technology for heating devices and automobile interiors, applied in electric heating devices, air handling equipment, ohmic resistance heating, etc., can solve the problems of expensive, labor-intensive, and easy to fail, and achieve the effect of simple price

Inactive Publication Date: 2011-07-06
MAHLE BEHR FRANCE ROUFFACH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such microcontrollers are labor-intensive to manufacture and therefore expensive, and thus prone to failure during operation

Method used

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  • Heating device, in particular for a motor vehicle air conditioning device
  • Heating device, in particular for a motor vehicle air conditioning device
  • Heating device, in particular for a motor vehicle air conditioning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] figure 1 shows a circuit diagram with three resistance heaters 1, here PTC heaters 2, these resistance heaters are used in particular for automotive air-conditioning equipment, not shown, to convect the flow The air in the car air conditioning unit is heated.

[0042]Here, the PTC heaters 2 are arranged in parallel, and these heaters are powered by a power supply 4 , that is, a vehicle power supply 5 other than the vehicle air conditioner. Here, the power supply 4 is used for supplying pulse width modulated current. In this case, a pulse-width modulated current is passed from the power supply 4 to the parallel current line 7 via the total current line 8 as current line 6 . A pulse-width-modulated current is conducted through the PTC heater 2 via a parallel current line 7 . A delay circuit 3 is respectively installed in two of the three parallel current conductors 7 . The delay circuit 3 has no information processor, that is to say, therefore also cannot execute prog...

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PUM

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Abstract

The present invention relates to a heating device, in particular for a motor vehicle air conditioning device. The heating device includes a housing, preferably a fan, preferably a coolant evaporator for cooling air to be supplied to the vehicle interior; at least two electric resistance heaters (1) for heating the air to be supplied to the vehicle interior and at least one delay circuit, preferably two delay circuits, wherein the at least two electric resistance heaters are suppliable with electric current; and a device (3) provided for supplying current to at least one of the at least two electric resistance heaters with a time delay relative to another electric resistance heater, and during the turning on or supplying current to the electric resistance heaters (1) a small maximum current peak requirement is to occur at low technical expenditures.

Description

technical field [0001] The invention relates to a heating device according to the preamble of claim 1 , in particular for a vehicle air-conditioning system, and a method for operating such a heating device according to the preamble of claim 12 . Background technique [0002] Automotive air conditioners are used to heat and cool the air introduced into the interior of the vehicle. To heat the air, electric heaters or resistance heaters are used here, which are used in particular in hybrid or electric locomotives. The resistance heater is energized, and the air introduced into the interior space of the vehicle is heated by passing the air through the resistance heater because the resistance of the resistance heater is heated. [0003] To control the different heating efficiencies of the resistive heaters, the resistive heaters are energized with a pulse width modulated (PWM) current. When the pulse width modulation current is passed to the resistance heater, the pulse width ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/02B60H1/00
CPCH05B1/0236H05B2203/02
Inventor 托马斯·勃鲁姆米夏埃尔·布龙
Owner MAHLE BEHR FRANCE ROUFFACH