DE102013202608A1 - Seat heating device for a vehicle seat - Google Patents

Abstract

The seat heating device according to the invention for a vehicle seat has separately controllable partial heating modules, in particular in the seat surface and in the back surface. Furthermore, a preselection switch for selecting different seat heating modes and an electronic control device for controlling the partial heating modules are provided as a function of the setting of the preselection switch. A seat heating mode is assigned both a predetermined heating power and at least one defined partial heating module.

Description

The invention relates to a seat heating device for a vehicle seat.

Seat heating devices for motor vehicles, especially coupled with electronically controlled heating and air conditioning systems are for example from DE 199 07 968 A1 or the DE 100 21 134 A1 known.

In known seat heating systems usually two to three power levels are provided via a button or via a switch. The heating power is controlled or regulated, for example, to 100%, 50% and / or 30% or to 2 or 3 fixedly defined temperature values.

It is an object of the invention to increase the comfort of a seat heating device.

This object is solved by the features of patent claim 1. Advantageous embodiments of the invention are contained in the dependent claims.

The invention is based on the following finding:
Experiments have determined that a seat does not need to be further heated some time after turning on a heater for a feeling of comfort. Another heating is even partially perceived as unpleasant. However, it has been found that even after some time further heating of the backrest is perceived as pleasant.

Therefore, the seat heating device according to the invention for a vehicle seat has separately controllable Teilheizmodule particular in the seat and in the back surface. Furthermore, a preselection switch for selecting different seat heating modes and an electronic control unit for controlling the Teilheizmodule depending on the setting of the preselection switch are provided. According to the invention, a seat heating mode is assigned at least one defined partial heating module, but a specific heating power is also specified for this. The invention therefore consists in a special combination of heating power and Teilheizmodul-controls according to the test findings depending on a selected each seat heating mode.

The electronic control unit of the seat heating device according to the invention may preferably be an already provided for a vehicle control unit for heating and / or air conditioning systems for controlling the temperature of the passenger compartment. The heating power of the seat heating can be adjusted independently or dependent on the manipulated variable of the heating or air conditioning. The manipulated variable corresponds to the deviation of the actual interior temperature from the set interior temperature set by the driver.

The seat heating mode is analogous to the previous selection of heating power depending on a manual preselection, eg. B. in the form of the previously known selectable "heat output levels" set.

In the drawing, an embodiment of the invention is shown. It shows an operating unit with electronic control unit of a heating and / or air conditioning, which is also used as a component of the seat heating device according to the invention.

In the single figure is a seat heating device according to the invention for a vehicle seat 1 with separately controllable partial heating modules 2a for the seat and 2 B represented for the back surface. Furthermore, a pre-selection switch 7 for selecting different seat heating modes I, II and III for manual operation by the driver. The partial heating modules 2a and 2 B as well as the preselection switch 7 are with an electronic control unit 4 connected. The heating power of the Teilheizmodule 2a and 2 B is for example by a pulse width-modulated signal PWM from the controller 4 regulated.

A first seat heating mode I is a comparatively low heating power PWM1 at least for the partial heating module which heats the seat surface 2a assigned.

A second seat heating mode II is a comparatively high heating power PWM3 both for the partial heating module which heats the seat surface 2a as well as for the back surface heating Teilheizmodul 2 B assigned.

A third seat heating mode III is an average heating power PWM2 only for the partial heating module which heats the back surface 2 B assigned.

In the seat 1 can be a temperature sensor 3 to measure the actual seat temperature T _{Sitz_ist be} attached. A control unit connected to the control unit 4 is connected, has a rotary switch 5 for setting a desired target interior _temperature T _{i_soll} on. Furthermore, the controller receives 4 the signal of an indoor temperature sensor 6 for detecting the actual interior _temperature T _{i_ist} . The difference between the measured actual interior _temperature T _{i_act} and that by the driver via the rotary switch 5 set target interior _temperature T _{i_soll} is the control variable for the heating / air conditioning. The Heating powers PMW for the seat heating can be made dependent on this control variable.

The preselection switch 7 can only be an on / off switch. In the example shown according to 1 it is a button for serial selectability of stages I, II and III as Sitzheizungsmodi. Of course, more than two pre-selection levels could be provided up to a continuous area code. The steps can be adjusted by a single button with appropriate lighting according to the selection of the currently selected step.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19907968 A1 [0002]
• DE 10021134 A1 [0002]

Claims (6)

Seat heating device for a vehicle seat ( 1 ) with separately controllable Teilheizmodulen ( 2a . 2 B ), with a pre-selection switch ( 7 ) for selecting different seat heating modes (I, II, III) and with an electronic control unit ( 4 ) for controlling the Teilheizmodule ( 2a . 2 B ) depending on the setting of the preselection switch ( 7 ), wherein a seat heating mode (I, II, III) both a predetermined heating power (PWM1, PWM2, PWM3) and at least one defined Teilheizmodul ( 2a ; 2 B ; 2a . 2 B ) assigned. Seat heating device according to claim 1, characterized in that a certain first seat heating mode (I) has a comparatively low heating power (PWM1) at least for a partial heating module (FIG. 2a ) assigned. Seat heating device according to one of the preceding claims, characterized in that a certain first seat heating mode (I) has a comparatively low heat output (PWM1) for a seat heating surface heating Teilheizmodul ( 2a ) and a back surface heating Teilheizmodul ( 2 B ) assigned. Seat heating device according to claim 1, characterized in that a certain second seat heating mode (II) has a comparatively high heating power (PWM3) at least for a partial heating module (FIG. 2a ) assigned. Seat heating device according to one of the preceding claims, characterized in that a certain second seat heating mode (II) has a comparatively high heating power (PWM3) for a partial heating module (FIG. 2a ) and a back surface heating Teilheizmodul ( 2 B ) assigned. Seat heating device according to one of the preceding claims, characterized in that a certain third seat heating mode (III) has an average heating power (PWM2) only for a partial heating module (FIG. 2 B ) assigned.

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