DE102018204947A1 - Vehicle seat with a comfort-optimized seat heating control with heating scenarios - Google Patents

Abstract

The invention relates to a vehicle seat having an air conditioning system for carrying out a comfort-optimized seat heating control with heating scenarios comprising at least one seat heating system with a Sitztemperierungseinrichtung and additionally in at least one embodiment at least one seat ventilation system, wherein a) at a predetermined installation location in a seat part and / or a backrest part of Vehicle seat at least one temperature sensor as a temperature-actual value sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part and alternatively b) near a surface of the seat part and / or the backrest part at least one further temperature actual value sensor for detecting the contact temperature of a contact surface on person sitting on the seat part and / or the backrest part, and / or c) in the seat part and / or the backrest part of the vehicle seat, at least one moisture senso r are arranged as humidity actual value for the absolute humidity within the cushion part of the at least one seat part and / or backrest part, so that by means of a control and regulating device by controlling the Sitztemperierungseinrichtung of the seat heating system in dependence on at a time (t) in which the Vehicle occupant sits on the vehicle seat, determined at the installation of the temperature sensor start temperature (T) in a heat-up period (.DELTA.t) of a Aufheizszenarios and beyond a comfort state of the seated on the vehicle seat person is effected.

Description

The invention relates to a vehicle seat having an air conditioning system for carrying out a comfort-optimized seat heating control with heating scenarios, comprising at least one seat heating system with a seat temperature control device and additionally in at least one other embodiment at least one seat ventilation system.

Document 10 2014 206 613 A1 discloses a method for conditioning a vehicle seat occupied by a vehicle occupant, which is equipped with a seat ventilation device and with a seat temperature control device, wherein a moisture value sensor arrangement determines a humidity value representative of a humidity of a surface of the vehicle seat and the seat ventilation device and the Sitztemperierungseinrichtung be controlled in dependence on the determined humidity value. It is provided that the seat ventilation device and the seat temperature control device are controlled in additional dependency on a skin temperature value detected by means of a temperature sensor arrangement and representative of a skin temperature of the face and / or hand region of the vehicle occupant.

By means of a temperature measurement on the skin (skin temperature value) it can be recognized that a condition is "too cold". However, it can not be differentiated between other states, in the comfort state "neutral or comfortable" and the state "too warm".

In the transition from the comfort state "neutral or comfortable" to the comfort state "too warm", the body tries to achieve a heat release with the help of moisture release and evaporation of the moisture. The skin temperature, which is also known as contact temperature, remains approximately the same.

In order to detect the states "warm" or "too warm", the moisture release of a person must be measured accordingly. Only one temperature measurement is not enough. If the temperature and the humidity in the contact area (s) can be measured as contact humidity and contact temperature, it is possible that the ventilation and heating are regulated independently of one another for backrest and cushions as required.

The temperature measured at an installation location of the temperature sensor in the seat depends on the sensor position (mounting location), depending on how far away the sensor is from the skin surface. In other words, the temperature sensor does not measure the true temperature between the skin and the seat part and / or the backrest part.

The humidity measured at a mounting location of the humidity sensor in the seat depends on the sensor position (mounting location), depending on how far away the sensor is from the skin surface. In other words, the humidity sensor does not measure the actual contact moisture between the skin and the seat part and / or the backrest part.

In its own experiments and constructions of a climate control, the temperature sensor is located under the seat cover and under the first or possibly also second lamination on a seat foam, wherein the arrangement also differs from vehicle seat to vehicle seat.

Between the clothed seated person and the reference of the seat part or backrest part, there is also a clothing layer to be observed.

Thus, the actual skin temperature in the contact area per se can not be determined by the layer of clothing forming an intermediate layer, independently of the respective temperature sensor positions which differ from vehicle seat to vehicle seat.

However, it is possible to deduce the skin temperature value in the respective contact area, which is also referred to as skin contact temperature value.

In test subject measurements, a temperature value of about 31 ° C was measured as comfort temperature in most subjects with a specific sensor position of the temperature sensor under stationary conditions. This approximately 31 ° C comfort temperature represents that temperature value that is actually measured at the installation location of the sensor in the seat part and / or backrest part.

According to the subject measurements, a skin contact temperature value of approximately 34 ° C. present on the skin in the contact area is assigned to this temperature value of 31 ° C. representing the skin contact temperature value, which is measured at the installation location of the sensor in the seat part and / or in the backrest part.

The temperature value of 31 ° C representing the skin contact temperature value at the installation site will be hereinafter referred to as the comfort temperature or the comfort temperature value T _K designated.

Became the comfort temperature T _K of approximately 31 ° C after it has been reached at the installation site of the sensor in the seat part and / or in the backrest part, again fell below, so this was below the comfort temperature T _K felt uncomfortably cool at the place of installation in the subjects.

With a comfort control according to the disclosure of the document DE 10 2014 206 613 A1 Ensures that the comfort temperature T _K of 31 ° C, which is measured at the installation location of the temperature sensor, is not exceeded, thereby advantageously a cooling of the person or a feeling of coolness of the person is reliably prevented.

It is also known that an unpleasant warm sensation arises above a "sultry limit" of about 13.5 g / kg of the absolute humidity. According to the study, this value is in the contact area at the installation site of the humidity sensor measured in the summer at about 12 g / kg and in winter at about 14 g / kg. The installation location of the humidity sensor is for example analogous to the temperature sensor under the seat cover and under the first or possibly also second lamination on a seat foam.

With a humidity control that depends on the comfort temperature value T _K carried out, it must therefore be prevented that this threshold is exceeded.

In this case, the seat ventilation device is already anticipated to be activated in a gentle manner when it is detected that the current moisture measurement value is moving toward a value above a moisture limit value of the low-humidity limit.

Likewise, the seat heating can be activated if it is anticipated that a current temperature reading is a temperature limit of the comfort temperature value T _K soon below.

In addition, the following was also recognized: When measuring the temperature of the comfort temperature T _K in the contact area of the seat part and / or backrest part there is the difficulty that the seated person heats the seat part and / or the backrest part in the most common cases at the time of sitting or in other words at the beginning of a ride first with his back or buttocks.

The heating already takes place when the seat surface contact temperature, hence the temperature on the seat surface of a seat part and / or back part is colder, than the contact skin contact temperature value of the person of about 34 ° C.

Due to the thermal mass of the seat part and the backrest part, it takes (without seat heating) for approx. 10 - 30 min (time span) to measure the heat flow between the contact surface of the seat part and / or the backrest part and the comfort temperature value T _K at the installation of the temperature sensor is almost constant, so that only after this period - in approximately thermally stationary state - on the comfort temperature value T _K can be reliably deduced to the actual Hautkontakttemperaturwert the clothed seated person

In addition, even in the so-called thermodynamic "well-being state" of humans, the heat flow between man and seat part and / or backrest part of the vehicle seat is not zero, since man continues to give about 100 watts to the environment even in the dormant thermodynamic "feel-good state".

That is, in a timeframe Δt _{heating up} in which the thermal mass of the seat part and / or the backrest part of which at one time t ₀ aufsetzenden and then sitting person is heated, can not be concluded with the temperature sensor at the installation of the seat part and / or backrest part for the reasons mentioned on the actual Hautkontakttemperaturwert the clothed seated person.

An example: In relatively warm conditions of, for example, 20 ° C ambient temperature, the seat part and the backrest part of the vehicle seat on the seat surface and at the installation of the temperature sensor and thus the comfort temperature value T _K of the contact area preconditioned to 20 ° C.

If a person now sits down on the vehicle seat, in the case of a temperature-controlled seat heating control, the seat heating is activated as a function of the predetermined desired constant "feel-good contact temperature", which is, for example, 34 ° C., in order to achieve the comfort temperature value as quickly as possible T _K of for example 31 ° C.

Since this procedure, as explained above, the actual thermal comfort state of the person is not taken into account, can not be considered with this procedure, whether the seated person actually (as assumed by the known ambient temperature in this example, 20 ° C) is cooled , so it is not clear whether the person wishes to activate the seat heating at all.

In addition, as already explained, the comfort temperature value T _K optionally at the installation site by the heat flow at least in the described heating period Δt _{heating up} changed so that a conclusion on the actual desired skin contact temperature value in this heating period Δ _{heating up} is not clearly possible.

It can be generated, for example, by activating the seat heating, a heat flow at a temperature that the person possibly heated does not want, and thus even perceived by the person as unpleasant, since the person is not, as assumed within the previous control strategy, cooled ,

In other words, the seated person can sit at the time of the ride t ₀ either not yet in the thermally optimal comfort state with a Hautkontakttemperaturwert <34 ° C (seat heating necessary) or in the thermally optimal comfort state with a Hautkontakttemperaturwert of = 34 ° C (seat heating not necessary) or even from the outset in the thermally too warm state with a Hautkontakttemperaturwert (seat heating counterproductive) of greater> 34 ° C.

The invention has for its object to provide a comfort-optimized seat heating control for a seat heating of a vehicle seat in a vehicle that largely takes into account individual thermal conditions of persons.

The starting point of the invention is a method for air conditioning a seated on a vehicle seat occupant and occupied by the vehicle occupant vehicle seat, which is equipped at least with a Sitztemperierungseinrichtung, wherein by means of a temperature sensor arrangement representative of a Hautkontakttemperaturwert on a surface of the vehicle seat comfort temperature value at a location of a Temperature sensor of the temperature sensor arrangement is determined.

According to the invention, it is provided in a first embodiment that at least the seat temperature control device is controlled according to a predeterminable initial temperature-dependent characteristic curve as a function of an initial temperature determined at the installation location of the temperature sensor at a time at which the vehicle occupant sits on the vehicle seat in a heating-up period of a heating-up scenario specifiable comfort temperature value along the characteristic curve.

In an expanded variant of the method of the first embodiment, starting from another starting point, it is proposed that the vehicle seat is equipped with a seat ventilation device next to the seat temperature control device, wherein a humidity sensor arrangement now represents a humidity value representative of a humidity of a surface of the vehicle seat at the installation location of a humidity sensor the humidity sensor arrangement is determined, so that according to the invention, the seat ventilation device and the seat temperature control additionally in dependence on the determined humidity value and depending on the at the time in which the vehicle occupant sits on the vehicle seat at the installation of the temperature sensor determined initial temperature in the heating period of Aufheizszenarios is controlled according to the predetermined starting temperature-dependent characteristic to regulate the predetermined comfort temperature value along the characteristic curve.

In yet another embodiment of the first embodiment, it is provided that the heat flow is measured in the contact area between the vehicle occupant and the seat part and / or between the vehicle occupant and the backrest part, so that, depending on the heat flow curve, from the time the vehicle occupant sits on the vehicle seat, and a heating scenario for the heating period is initiated as a function of the starting temperature determined at the installation location of the temperature sensor, in which the heat flow value of the heat flow curve is switched from the time as an auxiliary variable to the starting temperature-dependent characteristic, so that the predetermined initial temperature-dependent characteristic is controlled as a function of the auxiliary variable; to regulate the specified comfort temperature value along the starting temperature-dependent characteristic curve.

In a second embodiment of the method it is provided that the Sitztemperierungseinrichtung depending on a measured at a time in which the vehicle occupant sits on the vehicle seat, in the contact area between the vehicle occupant and seat part and / or between the vehicle occupant and backrest portion measured heat flow and depending on the location the temperature determined at the start temperature, a heating scenario for the heating period is controlled to regulate the predetermined comfort temperature value.

In an expanded variant of the method of the second embodiment, starting from another starting point, it is proposed that the vehicle seat is equipped with a seat ventilation device next to the seat temperature control device, wherein a humidity sensor arrangement now represents a humidity value representative of a humidity of a surface of the vehicle seat at the installation location of a humidity sensor the humidity sensor arrangement is determined so that According to the invention, the seat ventilation device and the Sitztemperierungseinrichtung depending on the determined moisture value and depending on the time at which the vehicle occupant sits on the vehicle seat, in the contact area between the vehicle occupant and seat part and / or between the vehicle occupant and backrest portion measured heat flow and in dependence on the Installation location of the temperature sensor determined initial temperature a heating scenario for the heating period is controlled to regulate the predetermined comfort temperature value.

In a preferred embodiment of the invention, the embodiments and related variants are provided that the control of Sitztemperierungseinrichtung or the control of Sitztemperierungseinrichtung and the seat ventilation device is controlled without upstream heating period /, if at the latest at the time of placement of a person inaktivschaltung the Aufheizszenarios is effected.

For example, it is preferably provided that an inactive switching of the heating scenario is effected as a function of a limit temperature of the starting temperature measured at the time of a person's touchdown.

In a further preferred embodiment of the invention it is provided that the Sitztemperierungseinrichtung is controlled depending on the detected by the temperature sensor of the temperature sensor assembly representative comfort temperature value only after the upstream heating period of Aufheizszenarios when the comfort temperature value remains at a time within a predeterminable control deviation and adjusted.

In addition, it is preferably provided that the combined control of the seat temperature control device and the seat ventilation device is controlled depending on the representative comfort temperature value detected by the temperature sensor of the temperature sensor arrangement and depending on the representative humidity value detected by the humidity sensor of the humidity sensor arrangement only after the preceding heat up period of the heating scenario if the comfort temperature value remains within a predefinable control deviation at a given time and has been adjusted.

In addition, it is preferably provided that the control is acted upon as an auxiliary variable, at least in the heating-up period, as a function of a solar radiation acting on the vehicle occupant and determined by means of a solar sensor determined by the solar radiation intensity.

Finally, the method can preferably be expanded such that the control automatically or manually different day and seasons and / or outside temperatures in the environment of the vehicle and / or different clothing conditions of the vehicle occupant and / or individual Wohlfühltemperaturverläufe at least one or more vehicle occupants in one or several climate profiles.

• • a) an einem vorgebbaren Einbauort in einem Sitzteil und/oder einem Rückenlehnenteil des Fahrzeugsitzes mindestens ein Temperatursensor als Temperatur-Istwertgeber zur Erfassung der Temperatur des Polsterteils des mindestens einen Sitzteils und/oder Rückenlehnenteils und alternativ
• • nahe einer Oberfläche des Sitzteiles und/oder des Rückenlehnenteiles mindestens ein weiterer Temperatur-Istwertgeber zur Erfassung der Kontakttemperatur einer Kontaktoberfläche einer auf dem Sitzteil und/oder dem Rückenlehnenteil aufsitzenden Person, und/oder
• • c) in dem Sitzteil und/oder dem Rückenlehnenteil des Fahrzeugsitzes mindestens ein Feuchte-Sensor als Feuchte-Istwertgeber für die absolute Luftfeuchte innerhalb des Polsterteils des mindestens einen Sitzteils und/oder Rückenlehnenteils angeordnet sind, sodass mittels einer Steuer- und Regeleinrichtung durch Steuerung der Sitztemperierungseinrichtung des Sitzheizungssystems in Abhängigkeit einer zu einem Zeitpunkt, in dem sich der Fahrzeuginsasse auf dem Fahrzeugsitz aufsetzt, am Einbauort des Temperatursensors ermittelten Anfangstemperatur in einem Aufheizzeitraum eines Aufheizszenarios und darüber hinaus ein Komfortzustand der auf dem Fahrzeugsitz aufsitzenden Person bewirkbar ist.

Structurally, a vehicle seat is formed which, depending on the implementation of the method, comprises an air-conditioning system for carrying out the method of a comfort-optimized seat heating control with heating scenarios, at least one seat heating system with a seat temperature control device and additionally in a second embodiment at least one seat ventilation system

• A) at a predefinable installation location in a seat part and / or a backrest part of the vehicle seat at least one temperature sensor as a temperature-actual value sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part and alternatively
• • near a surface of the seat part and / or the backrest part, at least one further temperature actual value sensor for detecting the contact temperature of a contact surface of a seated on the seat part and / or the backrest part person, and / or
• C) in the seat part and / or the backrest part of the vehicle seat at least one humidity sensor are arranged as humidity actual value for the absolute humidity within the cushion part of the at least one seat part and / or backrest part, so by means of a control and regulating device by controlling the Sitztemperierungseinrichtung the seat heating system as a function of at a time in which the vehicle occupant sits on the vehicle seat, determined at the installation of the temperature sensor initial temperature in a heating up a heating up and beyond a comfort state of sitting on the vehicle seat person is effected.

The vehicle seat preferably comprises a sun sensor which detects the solar radiation intensity acting in an interior of the vehicle and / or an outside temperature sensor which detects the ambient temperature of the vehicle.

• 1 Flussdiagramm zu einer Regelstrategie einer temperatur- und feuchteabhängigen Sitzheizung eines Fahrzeugsitzes;
• 2 ein T_K /t-Diagramm einer Kontakttemperatur über der Zeit mit mehreren Soll-Kennlinien zur Verdeutlichung von komfortoptimierenden Aufheizszenarien der temperatur- und feuchteabhängigen Sitzheizung des Fahrzeugsitzes;
• 3 ein T_K /t-Diagramm der Kontakttemperatur über der Zeit mit einer beispielhaften Soll-Kennlinie und einer beispielhaften Ist-Kennlinie zur Verdeutlichung der komfortoptimierenden Aufheizszenarien der temperatur- und feuchteabhängigen Sitzheizung des Fahrzeugsitzes.

The invention will be explained below with reference to the accompanying drawings. Show it:

• 1 Flowchart for a control strategy of a temperature and humidity-dependent seat heating of a vehicle seat;
• 2 one T _K / t diagram of a contact temperature over time with multiple setpoint characteristics to illustrate comfort-optimizing Aufheizszenarien the temperature and humidity-dependent seat heating of the vehicle seat;
• 3 one T _K / t diagram of the contact temperature over time with an exemplary desired characteristic and an exemplary actual characteristic curve to illustrate the comfort-optimizing heating scenarios of the temperature and humidity-dependent seat heating of the vehicle seat.

1 shows a fully automatic temperature control as a control strategy in an actively switched air conditioning system in a flowchart in the event that measured at the installation site of the temperature sensor comfort temperature value T _K of 31 ° in the contact area has already been adjusted.

According to the status rectangle 22 For example, the control of an air conditioning system comprising a seat ventilation system and a seat heater is active and the functions may be according to the decision rectangles 23 . 25 . 27 . 29 be switched to a switched on or switched off state. Seat part and / or backrest of a vehicle seat, not shown, are equipped with the seat ventilation system and a seat heater accordingly.

Is according to a first decision rectangle 23 a stable temperature reading of the comfort temperature value by means of the pad-side temperature sensor in the respective contact area T _K of greater than or equal to 31 ° C and by means of the pad-side humidity sensor a stable absolute moisture reading below the absolute moisture limit of 15 g / kg found in the / contact area / s optimal conditions before, so according to Status rectangle 24 no activation of a heating surface of the seat heating and no activation of the seat ventilation system takes place. This desirable state may have already been adjusted as a target comfort state with the following control strategies in advance.

Is doing according to a decision rectangle 23 subsequent decision rectangle 25 an absolute humidity reading relatively far below 12g / kg, for example, at 9g / kg, ascertained to increase rapidly, becomes according to a status rectangle 26 the seat ventilation system is switched on by means of a control signal to control this rising tendency, in order to prevent overshoot of the moisture measurement above the humidity limit value of 15 g / kg, with a temperature reading of the comfort temperature value on the control side T _K is maintained at about 31 ° C as a temperature limit.

Lies with a decision rectangle 23 also subsequent decision rectangle 27 a temperature measurement value of the comfort temperature value T _K> 31 ° C greater and falling or equal to the temperature limit of the comfort temperature value T _K = 31 ° C and falling or a temperature measurement value of the comfort temperature value T _K <31 ° C below 31 ° C before, in accordance with a status rectangle 28 the heating surface of the seat heating is switched on with a control signal to regulate the temperature to the temperature limit of 31 ° C.

Continue with a decision rectangle 23 also subsequent decision rectangle 29 an absolute humidity reading above 15 g / kg as the moisture limit is determined according to a status rectangle 30 the seat ventilation system for a reduction of the absolute humidity value below the humidity limit of 15 g / kg is switched on with a control signal.

According to the status rectangles 26 and 30 Thus, it comes to the connection of the seat ventilation system, including the seat heating system according to the status rectangle 28 is switched on when the explained conditions are met.

The ventilation and heating of the upholstery parts of the seat part and / or the backrest of the vehicle seat is thus carried out by means of the seat ventilation system and the seat heating.

In the upholstery parts of the vehicle seat controllable heating elements are arranged. In other words, the seat part and / or the backrest has a seat heating or a seat heating system.

The ventilation system comprises at least one fan which, via ventilation openings in the respective upholstered part, conveys or discharges air from the interior of the vehicle via the respective upholstered part of the vehicle seat into the interior of the vehicle.

The respective upholstery part has at least one temperature sensor as temperature actual value transmitter for the temperature inside the upholstery part and at least one humidity sensor as humidity actual value transmitter for the absolute air humidity inside the upholstery part.

Thereby, the thermal state conditions for the at least one contact region of a cushion part with a Control device with the heating system and / or with the ventilation system with a control algorithm evaluating the detected temperature and actual values by varying the air flow and / or the heating power as a target for a thermal comfort state to a predetermined target temperature measured value of the target comfort temperature value T _K -Soll , optionally an adjustable desired temperature limit range between 29 ° C and 33 ° C, preferably of 31 ° C, and to an absolute nominal moisture value between 12 g / kg and 15 g / kg, preferably below and less than an absolute target moisture limit value, if necessary of a predetermined absolute nominal moisture limit value of 15 g / kg.

According to the status rectangles 26 . 30 Thus, it comes to the connection of the seat ventilation system and according to the status rectangle 28 possibly also for switching on the seat heating system, wherein in the automatic mode of the control in each case an "extended comfort-optimized mode of operation" is proposed, which is explained in more detail in a further earlier application of the Applicant.

The inventive method is based on the 1 described fully automatic seat heating control according to the "comfort-optimized operation" according to 1 and description or the "extended comfort-optimized mode of operation", which is based on the "comfort-optimized mode of operation" in detail in the earlier patent application.

As already explained, there is the problem that, due to the thermal mass of the seat part and / or the backrest part (without seat heating), it takes about 5 minutes to 30 minutes (time span) to measure the heat flow between the occupant contact surface of the seat part and / or after appropriate measurements. or the backrest portion and the representative contact area in which the comfort temperature value T _K is measured, is almost constant, so that only after this period - in approximately thermally stationary state - can be reliably concluded on the actual skin contact temperature value of the clothed seated person

This period of time will continue to be referred to as heating-up period Δt _{heating up} designated.

According to the invention, provision is made for timed heating processes for the comfort-optimized or the enhanced comfort-optimized comfort control, which are used by a starting temperature or starting temperature T _A Hang in the seat part and / or in the backrest part of the vehicle seat.

2 shows a T _K / t diagram of a contact temperature over time with several desired characteristics to illustrate the vehicle seat comfort-optimizing heating scenarios of the temperature and humidity-dependent seat heating.

By means of a Aufsitzerkennungsvorrichtung the vehicle seat is at the time t ₀ sitting a person in the contact area of the seat part and / or the backrest part an initial temperature T _A measured. Each determined starting temperature T _A is associated with a previously determined and stored characteristic curve as temporal "well-being" -Temperaturverlauf, the invention according to the control technology, as explained below, approached.

2 shows exemplary curves for an initial temperature T _A = -20 ° C, -10 ° C, 0 ° C, 10 ° C, 20 ° and 30 ° C, in different heating periods Δt _{heating up} , (t ₀ -t ₁ , t ₀ -t ₂ , t ₀ -t ₃ , t ₀ -t ₄ , t ₀ -t ₅ , t ₀ -t ₆ ) a desired desired comfort temperature value T _K -Soll of 31 ° C, for example.

Some of the characteristics C setpoint ... ° are marked with K-Soll0 ° (initial temperature = T _A = 0 ° C), K-Soll 10 ° (initial temperature = T _A = 10 ° C), and K-Soll 20 ° (initial temperature = T _A = 20 ° C) ,

In contrast to the prior art, in the seat heating control according to the invention, a seat heating power becomes one at the time t ₀ measured start temperature T _A over time t to the desired comfort temperature value T _K -Soll adjusted.

The following specifications apply to a combined comfort control of a seat heater and seat ventilation.

The comfort control of the seat heating and seat ventilation is based on the seat heating control starting from the time t ₀ measured initial value T _A over time t to the desired comfort temperature value T _K -Soll for example 31 ° C.

Is that at the time t ₀ according to the initial value T _A measured comfort temperature value T _K -Is (compare 3 ) according to the underlying characteristic K-Soll ... ° warmer in this and a later time than the optimum desired desired comfort temperature value T _K -Soll, so it is not heated, where a heat flow supplied via the seat heating with a certain heat flux density would be perceived by the person as unpleasant.

Is that at the time t ₀ according to the initial value T _A measured actual comfort temperature value T _K -ist (see 3 ) according to the underlying characteristic curve K-setpoint ... ° colder than the optimum setpoint comfort temperature value at this time and later T _K -Soll This is heated, because it is a supplied heat flow necessary to maintain the thermal state of comfort of the person or reach.

It is envisaged that the further the measured comfort temperature value T _K -It is removed from the respective characteristic curve K-Soll ... °, in other words the larger the difference between T _K -Set the respective characteristic K-setpoint ... ° and the actual comfort temperature value T _K -It is, the more heating power is supplied to return to the predetermined temperature curve, that is the respective characteristic according to a predetermined gradient C setpoint ... ° to approach.

It is also in the different heating periods Δt _{heating up} , (t ₀ -t ₁ , t ₀ -t ₂ , t ₀ -t ₃ , t ₀ -t ₄ , t ₀ -t ₅ , t ₀ -t ₆ ) in addition to the control engineering approach of the respective characteristic curve K-setpoint. . ° also ensures that the humidity value always remains below 15 g / kg, which means that in addition to the seat heating, which may be switched on, the seat ventilation according to the status rectangles is also anticipatory 26 or 30 according to 1 and the associated description is activated to prevent the person from cooling down or perspiring.

It is understood that the characteristics C setpoint ... ° are different for different seat variants, sensor positions, materials used and are determined and adapted accordingly.

It is further understood that the characteristics C setpoint ... ° for the seat part and the backrest part also separately determined and stored.

The characteristics C setpoint ... ° for the seat part and / or the backrest part of the vehicle seat, a database on a control unit, which is assigned to the vehicle seat or the vehicle, for a comfort-optimized seat heating control deposited.

It is provided that the characteristic curve of the characteristics C setpoint ... ° can be subsequently adjusted.

In addition, it is disclosed that the characteristics C setpoint ... ° , unlike in the 2 and 3 imaged, follow a linear function or a staircase function. There is even the possibility of the respective function depending on the initial temperature T _A different shape.

According to one aspect of the invention, it is provided that the characteristic curves C setpoint ... ° or the measured heat flux density depending on a determined solar irradiation are automatically adjusted to the occupant.

It is provided that the information about the solar radiation intensity is provided by a sun sensor. For this purpose, the vehicle has a sun sensor which measures the radiation intensity of the sun acting on the vehicle seat and the person.

The person is automatically supplied with less heat through the seat heating, in particular when exceeding a definable limit of the detected solar radiation intensity. In other words, the predetermined characteristic curve (the characteristic C setpoint ... ° ) or the determined characteristic curve (the heat flow density) is adjusted accordingly as a function of the detected radiation intensity.

In this case, either the predetermined initial temperature-dependent characteristic curve K-Soll ... ° is adjusted as the characteristic curve or an adaptation of the measured heat flow profile takes place as a function of the radiation intensity.

A high radiation intensity also leads, according to another embodiment variant, to a characteristic curve in which, for example, the characteristic curves C setpoint ... ° are given less steeply compared to the originally based characteristic curve, so that the respective characteristic curve K Is the C setpoint ... ° achieved faster, resulting in a presumably undesirable switching on the seat heating and an overshoot above the desired contact temperature value T _K -Soll is avoided by for example 31 ° C.

In addition, it is proposed in another approach that when exceeding the specified limit of the detected radiation intensity of the sun at the time t ₀ selected characteristic, in particular the characteristic C setpoint ... ° be shifted in a range to higher temperatures, that is, it will not, for example, the characteristic K-Soll10 ° but, for example, the characteristic curves K-20 ° selected, or the heat flow curve is adjusted via a correction value down, whereby the seat heating is switched on later.

It is also proposed that the stored characteristic curves C setpoint ... ° Automatically adapt to different diurnal and seasonal times and / or outdoor temperatures and / or clothing conditions of a person or adjusted.

In particular, it is provided that the person himself to the initial temperature-dependent Wohlfühltemperatur-courses thus the characteristics C setpoint ... ° can exert influence over these characteristic curves via appropriate operating and visualization devices belonging to the vehicle seat C setpoint ... ° individually adapted to comfort.

The characteristics C setpoint ... ° are preferably stored in at least one personalized climate profile that is / are assigned to one or more persons / persons. The personalized climate profiles can be called up when needed.

Overall, there is the possibility of the characteristics C setpoint ... ° according to a desired level of comfort to adjust the control "warmer" or "colder". The desired comfort temperature value T _K -Soll For example, 31 ° C can be increased ("warmer" vote) or reduced ("colder" vote), causing the characteristics C setpoint ... ° easily assume a corresponding other characteristic curve with a different slope, so that the the characteristic C setpoint ... ° in a "warmer" vote, for example, on the desired comfort temperature value T _K -Soll from, for example, 31 ° C or, in the case of a "colder" vote, below the temperature value of the desired comfort temperature value T _K -Soll for example, 31 ° C runs.

3 shows for further explanation T _K / t diagram of the contact temperature over time with an exemplary desired characteristic K-Soll10 ° and an exemplary actual characteristic K Is to illustrate the comfort-optimizing Aufheizszenarien the temperature and humidity-dependent seat heating of the vehicle seat.

This in 3 illustrated T _K / t-diagram can apply to a seat part or for a backrest part. In this example, it is assumed that by the temperature sensor at the time t ₀ of the person sitting an initial temperature of T _A = 10 ° C as the initial temperature T _A is measured. In this case, the heating-up scenario takes place on the basis of the characteristic curve K-target 10 ° stored in a control unit.

After sitting on the person is thus cyclically, for example, in the second cycle of measured in the contact area actual temperature value according to the characteristic K Is with the desired comfort temperature value T _K -Soll which takes into account the person's heat input.

From the 3 For example, it shows that the characteristic K Is in two areas below the characteristic curve K-Soll10 ° runs, so in the respective areas for a certain time _A .delta.t the seat heating is activated to the characteristic curve K Is in the direction of the characteristic curve K-Soll10 ° to settle.

Similarly, there are areas in which the characteristic K Is above the characteristic K-Soll10 ° runs, with a range in 3 is shown. In this case and once the characteristic K Is the characteristic K-Soll10 ° has been achieved, it is ensured that the seat heating is turned off, as in by the reference numeral _A .delta.t is clarified.

By means of this procedure, the amount of heat per se and the inertia of the system in transferring the heat of the person in the heating-up period are thus advantageously taken into account, taking into account the heat flow introduced by the person into the vehicle seat Δt _{heating up} , According to the embodiment in the period t ₀ -t ₃ taken into account accordingly.

After the heating up period Δt _{heating up} . t ₀ - t ₃ the corresponding regulation described above according to 1 and associated description active, as in the selected embodiment, the corresponding desired comfort temperature value T _K -Soll = 31 ° at the time t ₃ is reached.

To overshoot the characteristic curve K Is over the respective characteristic C setpoint ... ° to avoid, it is also proposed that the heating scenario is only activated when the initial temperature T _A comparisons 1 - exceeds a certain limit. This limit can be individually changed or stored permanently in the corresponding computer program within the control unit. So it is possible, for example, over or equal to one at the time t ₀ measured start temperature T _A as a limit temperature of, for example,> / = 10 ° C or> / = 20 ° C to effect an inactive circuit of the heating scenario.

In another alternative approach, which may also be combined with that provided for above, the control is not based on the characteristic curves of the characteristic curves C setpoint ... ° , that is, it will not be the temperature gradients depending on the time t ₀ corresponding initial value T _A basis, but it will be measured in the contact area heat flow paths between human and seat part and / or between human and backrest part for a seat heating control of the seat heater.

In other words, it is based on a heat flow starting value 0 a heat flux density W / m ² measured in the seat part and / or the backrest part, which is introduced immediately after the person sitting in the seat part and / or the backrest part. For example, in different heating periods Δt _{heating up} a negative heat flux of, for example, 0 to 100 W / m ² detectable, which is initiated by the seated person in the seat part and / or the backrest part. It can thus be determined by permanently checking the heating process and thus the heat flow density W / m ² , if appropriate already the heat flow between the person and the vehicle seat is sufficiently large, so must be heated according to the present at the respective time deviation by means of the seat heating or not ,

The vehicle seat is otherwise set up to carry out the method according to the invention for comfort-optimized seat heating control. For this purpose, the vehicle seat comprises, in particular, a control device in which a computer-readable program algorithm for executing the method and optionally required characteristic curves and characteristic maps are stored.

LIST OF REFERENCE NUMBERS

22

status rectangle

23

decision rectangle

24

status rectangle

25

decision rectangle

26

status rectangle

27

decision rectangle

28

status rectangle

29

decision rectangle

Δt _{heating up}

warm-up

t ₀ , t ₁ , t ₂ , t ₃ , t ₄ , t ₅ , t ₆

time

T _K

Comfort temperature value at the installation location of a temperature sensor

T _K -ist

Actual contact temperature

T _K -Soll

Target contact temperature

t

Time

T _A

initial temperature

C setpoint ... °

Target curve

K-Soll0 °

Nominal characteristic at an initial temperature T _A from 0 ° C

K-Soll10 °

Nominal characteristic at an initial temperature T _A of 10 ° C

K-Soll20 °

Nominal characteristic at an initial temperature T _A from 20 ° C

K Is

Is characteristic

_A .delta.t

Period seat heating On

Δt _off

Period seat heating off

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 102014206613 A1 [0016]

Claims (16)

A method of air conditioning a vehicle occupant seated on a vehicle seat and a vehicle seat occupied by the vehicle occupant, wherein a comfort temperature value (T _K ) representative of a skin contact temperature value on a surface of the vehicle seat is detected at a location of a temperature sensor by a temperature sensor arrangement the temperature sensor arrangement is determined, characterized in that at least the Sitztemperierungseinrichtung in response to a at a time (t ₀ ), in which the vehicle occupant sits on the vehicle seat, determined at the installation of the temperature sensor initial temperature (T _A ) in a heat-up period (.DELTA.t _Heating ) of a heating-up scenario is controlled according to a predefinable starting temperature-dependent characteristic curve (K-setpoint... °) in order to regulate the predefinable comfort temperature value (T _K ) along the characteristic curve (K-setpoint... A method of air conditioning a vehicle occupant seated on a vehicle seat and a vehicle seat occupied by the vehicle occupant, wherein a comfort temperature value (T _K ) representative of a skin contact temperature value on a surface of the vehicle seat is detected at a location of a temperature sensor by a temperature sensor arrangement the temperature sensor arrangement is determined, characterized in that at least the Sitztemperierungseinrichtung depending on a at a time (t ₀ ), in which the vehicle occupant sits on the vehicle seat, measured in the contact area between the vehicle occupant and seat part and / or between the vehicle occupant and backrest part heat flow and in dependence of the initial temperature obtained at the installation location of the temperature sensor (T _a) a Aufheizszenario for the warm-up period (at _{heating up)} is controlled to the predetermined K omfort temperature value (T _K ). Method according to Claim 1 , characterized in that the vehicle seat is provided in addition to the Sitztemperierungseinrichtung with a seat ventilation device, wherein by means of a humidity sensor arrangement representative of a moisture content of a surface of the vehicle seat humidity value at the installation of a humidity sensor of the humidity sensor assembly is determined so that the seat ventilation device and the Sitztemperierungseinrichtung in function of the determined humidity value, and in dependence of at the time (t ₀₎ in which the vehicle occupant is seated on the vehicle seat determined at the installation location of the temperature sensor initial temperature (T _A) in the warm-up period (at _{heating up)} of the Aufheizszenarios initial temperature dependent according to the predetermined Characteristic (K setpoint ... °) is controlled in order to regulate the specified comfort temperature value (T _K ) along the characteristic curve (K setpoint ... °). Method according to Claim 2 , characterized in that the vehicle seat is provided in addition to the Sitztemperierungseinrichtung with a seat ventilation device, wherein by means of a humidity sensor arrangement representative of a moisture content of a surface of the vehicle seat humidity value at the installation of a humidity sensor of the humidity sensor assembly is determined so that the seat ventilation device and the Sitztemperierungseinrichtung in Depending on the determined moisture value and as a function of the measured at the time (t ₀ ) in which the vehicle occupant sits on the vehicle seat, in the contact area between the vehicle occupant and seat part and / or between the vehicle occupant and backrest portion measured heat flow and depending on the location of the temperature sensor determined initial temperature (T _a) a Aufheizszenario for the warm-up period (at _{heating up)} is controlled to regulate the predetermined comfort temperature value (T _K). Method according to Claim 1 or 3 , characterized in that in the contact area between the vehicle occupant and the seat part and / or between the vehicle occupant and backrest part of the heat flow is measured, so depending on the heat flow curve from the time (t ₀ ), in which the vehicle occupant sits on the vehicle seat, and in dependence determined at the installation location of the temperature sensor initial temperature (T _a) a Aufheizszenario for the warm-up period (at _{heating up)} is initiated in which the heat flow value of the heat flux curve from the time (t ₀₎ as the auxiliary variable to the initial temperature-dependent characteristic curve (K-setpoint ... °) is switched so that, depending on the auxiliary variable according to the predetermined initial temperature-dependent characteristic (K-target ... °) is controlled to adjust the predetermined comfort temperature value (T _K ) along the initial temperature-dependent characteristic (K-Soll ... °). Method according to one of Claims 1 to 5 Characterized in that the control of Sitztemperierungseinrichtung or control of the ventilation device Sitztemperierungseinrichtung and the seat without an upstream warm-up period (At _{heating up)} is controlled / are, if later than the time (t ₀₎ of a Inaktivschaltung Aufheizszenarios is effected. Method according to Claim 6 , characterized in that depending on a limit temperature, the measured at the time (t ₀ ) Start temperature (T _A ) an inactive circuit of Aufheizszenarios is effected. Method according to Claim 1 or 2 Characterized in that the Sitztemperierungseinrichtung in dependence of the sensed by the temperature sensor of the temperature sensor array representative comfort temperature value (T _K) only after the upstream warm-up period (At _{heating up)} of the Aufheizszenarios is controlled when the comfort temperature value (T _K) at a time (t ₃ ) remains within a predefinable control deviation and is regulated. Method according to one of Claims 3 or 4 Characterized in that the combined control of the Sitztemperierungseinrichtung and the seat ventilation means in response to the detected from the temperature sensor of the temperature sensor array representative comfort temperature value (T _K) and (depending on the detected by the humidity sensor, the humidity sensor assembly representative humidity value only after the upstream warm-up period Δt _heating ) of the heating scenario is controlled when the comfort temperature value (T _K ) at a time (t ₃ ) remains within a predetermined control deviation and is adjusted. Method according to at least one of Claims 1 to 9 , Characterized in that the control at least in the warm-up period (At _{heating up)} is applied determined in dependence on a force acting on the vehicle occupant and by means of a solar radiation intensity detected solar sensor sunlight as an auxiliary variable. Method according to at least one of Claims 1 to 10 , characterized in that the control automatically or manually adapted to different diurnal and seasonal times and / or outdoor temperatures in the environment of the vehicle and / or different clothing conditions of the vehicle occupant and / or individual Wohlfühltemperaturverläufe at least one or more vehicle occupants in one or more climatic profiles becomes. Vehicle seat having an air conditioning system for performing the method according to Claim 1 and 2 comprising at least one seat heating system with a Sitztemperierungseinrichtung, wherein • at a predetermined location in a seat part and / or a backrest part of the vehicle seat at least one temperature sensor is arranged as a temperature sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part, so by means of a control and regulating device by controlling the Sitztemperierungseinrichtung the seat heating system as a function of at a time (t ₀ ) in which the vehicle occupant sits on the vehicle seat, determined at the installation of the temperature sensor initial temperature (T _A ) in a _heat- up period (.D _{Heat up} ) a Aufheizszenarios and beyond a comfort state of the seated on the vehicle seat person is effected. Vehicle seat having an air conditioning system for performing the method according to Claim 2 comprising at least one seat heating system with a Sitztemperierungseinrichtung, wherein • at a predetermined installation location in a seat part and / or a backrest part of the vehicle seat at least one temperature sensor as a temperature sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part for detecting a predetermined Comfort temperature value (T _K ) and • near a surface of the seat part and / or the backrest part at least one further temperature-value sensor for detecting the contact temperature of a contact surface of a seated on the seat part and / or the backrest part person are arranged, so by means of a control and regulating device by controlling the Sitztemperierungseinrichtung of the seat heating system as a function of at a time (t ₀ ), in which the vehicle occupant sits on the vehicle seat, determined at the installation location of the temperature sensor initial tempera tur (T _A) in a warm-up period (At _{heating up)} of a Aufheizszenarios and beyond a comfort state of the seated on the vehicle seat person is effected. Vehicle seat having an air conditioning system for performing the method according to Claim 3 comprising at least one seat heating system with a Sitztemperierungseinrichtung and at least one seat ventilation system, wherein • at a predetermined location in a seat part and / or a backrest part of the vehicle seat at least one temperature sensor as a temperature sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part and • in the seat part and / or the backrest part of the vehicle seat at least one humidity sensor as humidity actual value for the absolute humidity within the cushion part of the at least one seat part and / or backrest part are arranged, so by means of a control and regulating device by controlling the Sitztemperierungseinrichtung of the seat heating system as a function of an initial temperature (T _A ) determined at the installation site of the temperature sensor at a time (t ₀ ) in which the vehicle occupant sits on the vehicle seat in a heating-up period (.DELTA.t _heating ) a heating scenario and beyond a comfort state of the seated on the vehicle seat person is effected. Vehicle seat having an air conditioning system for performing the method according to Claim 4 comprising at least one seat heating system with a Sitztemperierungseinrichtung and at least one seat ventilation system, wherein • at a predetermined location in a seat part and / or a backrest part of the vehicle seat at least one temperature sensor as a temperature sensor for detecting the temperature of the cushion part of the at least one seat part and / or backrest part and • at least one further temperature actual value sensor for detecting the contact temperature of a contact surface of a person seated on the seat part and / or the backrest part near a surface of the seat part and / or the backrest part, and at least one in the seat part and / or the backrest part of the vehicle seat Moisture sensor are arranged as humidity actual value for the absolute humidity within the cushion part of the at least one seat part and / or backrest part, so that by means of a control and regulating device by controlling the Sitztemperierungseinrichtung of the seat heating system as a function of at a time (t ₀ ), in which the vehicle occupant sits on the vehicle seat, determined at the installation of the temperature sensor start temperature (T _A ) in a _heat- up (.DELTA.t heating) a heating scenario and beyond a comfort state of the person sitting on the vehicle seat is effected. Vehicle seat after one of Claims 12 to 15 , characterized in that the air conditioning system comprises a sun sensor, which detects the applied in an interior of the vehicle solar radiation intensity and / or comprises an outside temperature sensor, which detects the ambient temperature of the vehicle.

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