VEHICLE SEAT AND A METHOD FOR OPERATING A VEHICLE SEAT

Description

[0001] The invention relates to a seat for a vehicle and a method for operating a seat for a vehicle.

[0002] Conventional vehicle seats often suffer from insufficient air circulation between the seat and the occupant. Moisture, particularly sweat, can no longer be adequately absorbed by the ambient air in the areas where the occupant comes into contact with the seat. This can be particularly prevalent during longer journeys, for example, with seats in commercial vehicles where the occupant is known to spend extended periods of time.

[0003] The body fluids are then absorbed by the seat or upholstery. A damp seat can be uncomfortable for the user. Furthermore, the moist environment promotes bacterial growth.

[0004] Conventional seats often have seat heating or a ventilation system that is activated by the user. However, the user is usually already cold, sweaty, damp, or wet when the system is activated, causing the moisture to be absorbed by the seat or seat cushions. Furthermore, ventilated seats often overcool the skin, which can cause tension or back pain in the user.

[0005] The aim of the invention is therefore to provide a seat for a vehicle or a method for operating a seat for a vehicle which solves the problems mentioned above.

[0006] According to the invention, the seat comprises at least one sensor device. The sensor device has at least one temperature sensor and at least one humidity sensor, which can detect the comfort parameters of temperature and / or humidity in the seat, particularly on or near the surface of the seat. Furthermore, it is advantageous if the comfort parameters can be detected beneath the surface or within the upholstery structure. When the seat is occupied, this surface is preferably in contact with the user. However, the sensor device can also comprise further sensors, by means of which various types of sensor data can be detected.

[0007] According to the invention, the seat further comprises a control device that controls or regulates the seat climate based on the comfort parameters. The sensor device is therefore connected to the control device via signaling. According to the invention, the seat climate can be actively controlled or regulated by means of the control device, whereby the control of the seat climate is understood to mean the control of the comfort parameters.

[0008] A control system is typically understood as an output variable resulting from an input signal. Such an input signal is usually a binary variable, for example, on / off. A closed-loop control system is based on the feedback of an output signal. In closed-loop control, the controlled variable is continuously compared with a setpoint. Based on the deviation of the values, the controller determines a manipulated variable that affects the controlled variable in such a way that the deviation is minimized and the controlled variable assumes a desired time behavior, despite the presence of disturbances.

[0009] According to the invention, the control device controls or regulates a heating device and a ventilation device of the seat, whereby the seat climate can be actively controlled accordingly.

[0010] The object of the invention is therefore solved by the subject matter of claim 1.

[0011] Advantageous embodiments are disclosed in the subclaims.

[0012] An essential point of the invention is a vehicle seat comprising at least one seat element in which at least one heating device and at least one ventilation device are provided, wherein the vehicle seat comprises a sensor device which has at least one temperature sensor and at least one humidity sensor, wherein a regulating / control device controls and / or regulates the heating device and / or the ventilation device based on the data from the sensor device with regard to the comfort parameters temperature and / or humidity content, whereby the seat climate can be actively controlled and / or regulated.

[0013] With such a vehicle seat, the seating climate is already adjusted to the comfort parameters before the user experiences the unpleasant consequences of a suboptimal seating climate. As already mentioned, such unpleasant consequences include hypothermia, sweating, humidity, or wetness, which can cause tension or back pain for the user.

[0014] Of course, the term comfort parameters can also include other data. This can include additional sensors that are connected to the control system via signals. Such sensors can also be located outside the vehicle seat.

[0015] For example, sensors that analyze driving behavior would be conceivable. If the driver detects unusual driving behavior, such as fatigue, the control system could activate certain functions, such as cooling the seat.

[0016] Furthermore, the control device can advantageously be connected to other devices in terms of signals in addition to the heating device and the ventilation device and can control or regulate these accordingly.

[0017] It would also be conceivable to control the heating and / or ventilation systems based on predefined times. This could, for example, involve heating the seat in the morning on a cold winter day.

[0018] According to a preferred embodiment, the control device has a memory device in which setpoints or setpoint ranges for the comfort parameters or setpoints or setpoint ranges for comfort parameter combinations are stored. These setpoints represent predetermined comfort limits of the comfort parameters or the comfort parameter combinations. The control device advantageously compares the data provided by the sensor device with the corresponding setpoints or comfort limits. Active control of the comfort parameters or the seat climate is then preferably carried out by automatically controlling the heating device and / or the ventilation device by the control device. The control device advantageously controls / regulates individual comfort parameters. Accordingly, for example, a specific temperature value or humidity level can be set.However, optimal seat climate control often requires specific comfort parameter combinations. For example, a specific temperature range or a specific preset temperature would be optimal for a given humidity level. Such comfort parameter combinations can be stored in the memory device as setpoints or setpoint ranges.

[0019] According to a further preferred embodiment, an input device is signal-connected to the control device. Advantageously, the user can directly adjust the comfort parameters, such as temperature or humidity, using the input device. It is also advantageous that the setpoint values ​​or setpoint ranges of the comfort parameters or combinations of comfort parameters can be manipulated and / or entered into the memory device using the input device.

[0020] According to a preferred embodiment, the seat comprises two seat elements. Advantageously, one seat element is a lower seat part, i.e. the part of the seat on which the user sits. Advantageously, the further seat element is a backrest element. It is advantageous if the sensor device comprises at least one temperature sensor and at least one humidity sensor for the lower seat part and at least one temperature sensor and at least one humidity sensor for the backrest element. Accordingly, the seat climate can be actively regulated both in the lower seat part and in the backrest element. Corresponding regulation can take place in both seat elements simultaneously. Alternatively, active regulation or control can take place in the individual seat elements independently of one another.Advantageously, the input device can be used to select which seat element, or both seat elements, is to be actively climate controlled.

[0021] The seat elements, lower seat part and backrest element, advantageously each comprise a height direction Z, Z'. The height direction Z, Z' is to be understood such that the uppermost layer of the seat element is the one in contact with the user and the lowest element is the one furthest from the user.

[0022] According to the invention, the at least one seat element comprises a first layer made of a material that can absorb and conduct moisture. According to the invention, the material of the first layer is porous and / or open-pored. The first layer preferably consists of a moisture-conducting foam or a moisture-conducting fabric. This material is advantageously open-pored and is suitable for immediately absorbing moisture and then conducting it accordingly. It would also be conceivable for the material of the first layer to be a nonwoven, a woven fabric, a knitted fabric, or a spacer fabric.

[0023] Advantageously, the surface of the first layer is in direct contact with the user or in close proximity to the user when the seat is occupied. It would also be conceivable to arrange additional layers above the first layer, whereby these layers should also be moisture-wicking. For example, it may be advantageous for this first layer to be covered by a moisture-wicking cover, such as a moisture-wicking fabric cover. Accordingly, contact with the user can be direct or indirect through the cover in between.

[0024] According to the invention, at least one temperature sensor and at least one humidity sensor are arranged in the at least one seat element such that the comfort parameters of temperature and humidity can be detected on or near the surface of the seat element. Furthermore, it is advantageous for the comfort parameters of temperature and / or humidity to be detectable beneath the surface or in the upholstery structure. It may also be advantageous to detect the comfort parameters in a specific layer, for example, the first layer. According to the invention, a heating device and a ventilation device are arranged in the at least one seat element, whereby the comfort parameters or the seat climate can be actively controlled.

[0025] According to a further preferred embodiment, at least one temperature sensor and / or at least one humidity sensor are arranged in both seat elements, i.e., both in the lower seat part and in the backrest element, whereby the comfort parameters of temperature and / or humidity can be detected on or near the surfaces of the seat elements. Furthermore, at least one heating device and at least one ventilation device are advantageously arranged in the two seat elements, whereby the comfort parameters or the seat climate can be controlled / regulated.

[0026] According to a further preferred embodiment, the at least one temperature sensor and / or the at least one humidity sensor is arranged in and / or above and / or below the first layer. The term "below the first layer" can mean, on the one hand, that the sensors are located directly below the first layer. However, it is also possible for additional layers to be located between the first layer and the sensors. The term "above the first layer" can be interpreted analogously. It would also be conceivable for the at least one temperature sensor and / or the at least one humidity sensor to be arranged in the cover arranged on the first layer.

[0027] It is advantageous for the control device to evaluate the data transmitted by the sensor device depending on the distance of the respective sensor from the surface of the at least one seat element in contact with the user. By advantageously taking the distance to the user into account, the seat climate can be adjusted much more precisely. Furthermore, it would be conceivable to consider the material properties of the materials located between the user and the sensor. Such material properties can include, for example, moisture absorption and the capacities of the layers.

[0028] According to a preferred embodiment, the heating device and the ventilation device are arranged in the at least one seat element. Advantageously, at least one heating device is arranged below the first layer in the vertical direction Z, Z' of the seat element. The term below the first layer can mean, on the one hand, that the heating device is located directly below the first layer. However, it is also possible for further layers to be located between the first layer and the heating device. It would be conceivable for exactly one heating device to be arranged below the first layer in the vertical direction of the seat element. It would also be conceivable for two or more heating devices to be arranged below the first layer.

[0029] Analogously, at least one ventilation device is arranged in the height direction Z, Z' of the seat element under the first layer.

[0030] It would also be conceivable for at least one heating device to be arranged above the first layer. Furthermore, it would be possible to arrange at least one heating device above and at least one heating device below the first layer.

[0031] According to a further preferred embodiment, a gap is arranged beneath the first layer, which gap is filled with a preferably gaseous fluid, for example, air. A heating device is preferably provided below and / or above this gap. Advantageously, the air in the gap is heated by the heating device and can thus absorb more moisture.

[0032] According to a further preferred embodiment, the at least one seat element comprises at least one further first layer, which is arranged below the first layer. This at least one further first layer is also made of a material that can absorb and conduct moisture. Advantageously, an intermediate space is provided between and / or below the first layers, which space is filled with a preferably gaseous fluid, for example air. Preferably, a heating device is provided below and / or above these intermediate spaces. Advantageously, the air located in the intermediate spaces is heated by the respective heating device and can thus absorb more moisture.

[0033] Advantageously, the at least one heating device is arranged flatly, preferably over the entire surface, beneath the first layer. This allows for effective heating of the first layer.

[0034] According to a further embodiment, a spacer fabric is arranged beneath the first layer in the vertical direction Z, Z' of the at least one seat element. The term "beneath the first layer" can mean, on the one hand, that the spacer fabric is located directly beneath the first layer. However, it is also possible for additional layers to be located between the first layer and the spacer fabric. Such a spacer fabric has high air permeability and good cushioning properties.

[0035] Preferably, at least one heating device is arranged between the first layer and the spacer fabric. Accordingly, a spacer fabric is arranged below at least one heating device in the vertical direction Z, Z' of the seat element.

[0036] Advantageously, a shaped element is arranged at least in sections under the spacer fabric in the height direction Z, Z' of the at least one seat element. The shaped element consists of a material which provides appropriate resistance or padding with regard to the pressure load caused by contact with the user. Furthermore, the formal configuration of the shaped element essentially determines the shape of the seat element. The shaped element can preferably consist of a cold foam. However, it would also be conceivable for the shaped element to be made of another suitable shaping material. Preferably, the shaped element has a ventilation area in which a plurality of ventilation ducts are provided. Furthermore, it is advantageous for the shaped element to have an area bordering the ventilation area. This bordering area can have side cheeks.In a preferred embodiment, a corresponding control / regulation of the seat climate in this area is not provided, since the user usually has only minimal contact with such side bolsters.

[0037] Preferably, the ventilation ducts of the fan area are connected to the at least one ventilation device. If two seat elements are provided in the form of a lower seat part and a backrest element, active control / regulation of the seat climate of only the lower seat part or only the backrest element can be provided, as already described. However, active control / regulation of the seat climate of both the lower seat part and the backrest element can also be provided. For this purpose, a ventilation device can advantageously be assigned to each of the two seat elements, which can also be controlled individually according to the sensor data. However, it would also be conceivable for the ventilation ducts to be connected to only one ventilation device.Individual ventilation of the two seat elements could be achieved by a locking device arranged in the respective connecting channels between the ventilation device and the respective seat element. This locking device can be used to determine which seat element is ventilated. If necessary, both seat elements can also be ventilated simultaneously.

[0038] The seat element can preferably also have additional layers located below, above, or between the previously mentioned components. These layers can be of different construction and possess different properties. It is also possible that the described seat structure can be composed differently in terms of its position and layout depending on the components described.

[0039] The structure of the seat element described above can apply to the lower seat part as well as to the backrest element.

[0040] According to the invention, the at least one seat element can be heated by at least one heating device. According to the invention, moisture is absorbed in the first layer of the seat element. Furthermore, air is preferably enclosed in the first layer. As a result of heating, at least a portion of this moisture transforms into the gaseous state, depending on the temperature. Furthermore, the air in the seat element is heated, which can thus absorb more moisture. Accordingly, the vapor pressure in the seat element advantageously increases. A vapor is thus generated in the seat element. Ideally, such a vapor can be a purely gaseous phase or else a mixture of liquid and gaseous components.

[0041] The change in state of aggregation can result in a further advantage in the form of increased cooling of the surface of the seat element due to the heat of evaporation that is generated.

[0042] According to the invention, the steam generated by the heating is transported out of the seat element by means of the ventilation device. According to the invention, the ventilation device operates in suction mode. The steam is therefore sucked out of the seat element by the ventilation device. Since the heating of the seat element causes the steam to have a higher temperature than the corresponding surrounding air volume, a differential pressure is created, which can cause an increased flow velocity of the steam. This increased air velocity, due to the thermal effect and the suction mode of the ventilation device, allows for rapid removal of the steam or moisture from the seat element.

[0043] However, it would also be conceivable for the ventilation system to be set to blow mode. This would allow air to be introduced into the first layer, thereby forcing the steam out of the first layer or removing it from the first layer.

[0044] According to a preferred embodiment, the sensor device comprises a seat occupancy sensor that detects the comfort parameter "seat occupancy." Due to the advantageous detection of seat occupancy, certain preferred modes that require no seat occupancy can be implemented automatically. The seat occupancy sensor can be arranged at any suitable position in the at least one seat element.

[0045] According to a further preferred embodiment, the seat climate is regulated by alternately heating and ventilating the first layer. Advantageously, the at least one heating device and / or the at least one ventilation device can be switched on or off at predetermined intervals. Advantageously, the at least one heating device can be switched on or off at intervals such that essentially no temperature change occurs on the surface of the seat element. The term "essentially no temperature change" is to be interpreted to mean that a temperature change lies within a range that is imperceptible to the user. Such a temperature change can therefore preferably lie in a range from 0°C to 10°C, more preferably from 0°C to 5°C, more preferably from 0°C to 2.5°C, more preferably from 0°C to 1°C.The heating intervals are designed so short that a corresponding conversion of the moisture in the seat element, or rather the first layer, can occur, but the heating does not last so long that the surface of the seat element that is in contact with the user becomes noticeably warm. Thus, the moisture converted into vapor can be effectively removed by the ventilation system without the seat becoming noticeably warm to the user.

[0046] Preferably, the at least one heating device and / or the at least one ventilation device are switched on or off at predetermined intervals. Advantageously, the at least one heating device is switched on at intervals such that heating of the seat or the seat element does not reach the surface of the seat element.

[0047] Typically, heat propagation is inversely proportional to the propagation length, which in this case is the height of the first layer. An interval length can therefore be dimensioned such that no significant temperature change occurs on the surface of the seat element that is perceived by the user. Humans detect heat very late, meaning that the surface temperature can be exceeded briefly without the user noticing. This design allows the seat to be air-conditioned, preferably while the seat is occupied.

[0048] A heat conduction is advantageously determined from the thermal coefficient of the first layer (λ), the temperature difference (T) between the heating device and the surface of the first layer and the height (h) as follows: λ * T * 1 / h .

[0049] It may be advantageous if the ventilation device is operated continuously at the same time. Alternatively, the ventilation device can be operated alternately with the at least one heating device.

[0050] The at least one seating element can therefore be maintained within a comfort range. Such a comfort temperature range is preferably between 28°C and 38°C, ideally 32±5°C. A comfort humidity range is preferably between 10% and 85%, ideally 50% relative humidity.

[0051] The at least one heating device and the at least one ventilation device are preferably operated depending on the continuously detected comfort parameters. By advantageously activating the heating device and / or the ventilation device, the comfort parameters can be transferred into the comfort range. For example, if the detected relative humidity values ​​are above a comfort range, this moisture can be effectively removed from the first layer and also from the driver's clothing.

[0052] According to a further embodiment, the comfort range of the comfort parameters can be adjusted by alternately heating and ventilating the first layer. This allows the comfort range to be quickly reached, particularly when the seat is unoccupied. This advantageous heating, in turn, creates vapor, or rather, vapor pressure, in the at least one seat element. By advantageously alternating activation of the ventilation device, this vapor can be distributed in the at least one seat element and quickly extracted.

[0053] Due to the lack of seat occupancy, the first layer can be heated to a higher temperature, allowing more liquid to enter the gas phase, or the air in the vehicle seat to absorb even more liquid. This allows at least one seat element to be quickly returned to the comfort zone during a break in occupancy.

[0054] For this purpose, the vehicle seat advantageously features a seat occupancy detection system. Alternatively, a manual adjustment device can be provided, by means of which the various modes can be selected.

[0055] By advantageously alternating heating and ventilating the first layer, self-cleaning or disinfection of this first layer can occur. The advantageous removal of moisture from the first layer deprives bacteria of their breeding ground. Dehumidification is advantageously achieved by targeted heating and ventilating of the first layer.

[0056] According to a further aspect of the invention, antibacterial cleaning or disinfection of the seat element is achieved by raising the seat temperature to a temperature at which bacteria and germs cannot survive. Preferably, the temperature is increased to above 80°C. This effectively kills bacteria and germs present in at least one seat element. This advantageously occurs without the seat being occupied. This does not require detection of the comfort parameters temperature and humidity by means of the comfort parameter sensors.

[0057] Preferably, preconditioning of the seat element can take place. This means setting the comfort parameters before the seat is occupied. Preconditioning preferably starts after a predeterminable start event. Such a start event can, for example, be the reaching of a specified time. Accordingly, the control device would comprise a time element, a clock, or similar, or be signal-linked to such an element. The control device then regulates or controls the comfort parameters of the seat element within the comfort range. Such a start event can, for example, be the unlocking of the vehicle or the user approaching the vehicle, which is detected by a corresponding sensor.

[0058] In the embodiments described above, one or more seat elements, for example a lower seat part and a backrest element, can be operated accordingly.

[0059] The object is further achieved by a method for operating a vehicle seat. Such a method for operating a vehicle seat, which has at least one seat element in which a heating device and a ventilation device are provided, comprises the following method steps: a) Acquisition of sensor data by the sensor device, which has at least one temperature sensor and at least one humidity sensor; b) Optionally, comparison of the acquired sensor data with specified target values ​​by the control device;c) activating at least one heating device and / or at least one ventilation device by the regulating / control device, wherein the at least one seat element comprises a first layer which consists of a material which can absorb and conduct moisture and the material of the first layer is porous and / or open-pored, wherein the at least one seat element can be heated by at least one heating device, as a result of which moisture absorbed in the first layer changes at least into a gaseous state and the air in the seat element is heated, wherein the steam generated by the heating can be conveyed out of the seat element by means of the ventilation device, wherein the steam is sucked out of the seat element by means of the ventilation device;

[0060] The method can be equipped with all the features already described above in the context of the device, individually or in combination with one another, and vice versa. Preferably, the device is suitable and intended for carrying out the described embodiments of the method (in particular, individual and / or multiple embodiments).

[0061] The method advantageously allows for various operating modes to be set. This can advantageously be done using a suitable input device. The methods advantageously differ depending on whether the seat is occupied or not. Advantageously, step a) therefore also includes the acquisition of sensor data from a seat occupancy sensor.

[0062] According to a preferred embodiment, when the seat is not occupied, the regulating / control device (9) carries out an antibacterial cleaning of the seat element by controlling the at least one heating device (10) so that the at least one seat element is brought to a temperature at which bacteria and germs are killed, this temperature being 80°C.

[0063] Preferably, the ventilation device is operated simultaneously during antibacterial cleaning. Alternatively, the heating device and the ventilation device can be operated alternately. By advantageously removing moisture from the at least one seat element, or from the first layer of the at least one seat element, bacteria are deprived of their breeding ground. Dehumidification is advantageously carried out by targeted heating and ventilating of the first layer. By advantageously alternating heating and ventilating the first layer, self-cleaning or disinfection of this first layer can occur.

[0064] According to a preferred embodiment, when a seat is occupied, the at least one heating device and the at least one ventilation device are activated at alternating intervals by the control device. Advantageously, the interval length for activating the at least one heating device is designed such that there is essentially no temperature change on the surface of the seat element. The term "essentially no temperature change" is to be interpreted to mean that a temperature change lies within a range that is imperceptible to the user. Such a temperature change can therefore preferably lie in a range from 0°C to 10°C, more preferably from 0°C to 5°C, more preferably from 0°C to 2.5°C, more preferably from 0°C to 1°C. However, the amount of heat introduced into the first layer is sufficient to convert a sufficient amount of moisture into steam.The vapor produced may preferably consist of a gas phase and optionally of a liquid phase.

[0065] The advantageous method of alternating activation of the heating and ventilation systems at intervals is advantageous when the humidity level is above the comfort limit. However, at the same time, the temperature is within or above the comfort limit. This mode allows moisture to be removed from both the seating element and the user's clothing, thus drying them.

[0066] If the temperature is below the comfort range, the interval length can be adjusted accordingly so that a sufficient amount of heat is introduced into the seat element, or the first layer of the seat element, so that its temperature is brought back into the comfort range.

[0067] Such a comfort temperature range is preferably between 28°C and 38°C, ideally 32±5°C. A comfort humidity range is preferably between 10% and 85%, ideally 50% relative humidity.

[0068] According to a preferred embodiment, when the seat is unoccupied, the at least one heating device and the at least one ventilation device are activated at alternating intervals by the regulating / control device. The interval length for activation of the at least one heating device is advantageously designed such that the at least one seat element is heated to a temperature which lies above a predetermined comfort range. The comfort temperature range is preferably between 28°C and 38°C. More preferably, the comfort temperature range is 32±5°C. Accordingly, in this mode, a temperature change occurs on the surface of the seat element, which is, however, irrelevant due to the unoccupied seat. By using a higher temperature, more liquid transforms into the gas phase, or the air in the vehicle seat can absorb even more liquid.At least one seating element can thus be returned to the comfort zone more quickly during a break in occupancy.

[0069] According to a further preferred embodiment, upon the occurrence of a predetermined start event, preconditioning of the at least one seat element takes place, in which the comfort parameters are brought into the predetermined comfort range by activation of the at least one heating device and / or the at least one ventilation device by the regulating / control device. This means setting the comfort parameters before the seat is occupied. Preferably, preconditioning starts after a predetermined start event. Such a start event can, for example, be the reaching of a predetermined time. Accordingly, the regulating / control device would comprise a time element, a clock, or the like, or be connected to such an element via signaling. The regulating / control device then regulates or controls the comfort parameters of the seat element within the comfort range.Such a start event can be, for example, unlocking the vehicle or the user approaching the vehicle, which is detected by a corresponding sensor.

[0070] Further advantages, objects, and features of the present invention will be explained in the following description of the accompanying figures. Similar components may have the same reference numerals in the various embodiments.

[0071] The figures show: Fig. 1a shows a seat element according to an embodiment of the invention; Fig. 1b shows a seat element according to an embodiment of the invention; Fig. 1c shows a seat element according to an embodiment of the invention; Fig. 2 shows a seat element according to an embodiment of the invention; Fig. 3 shows a diagram of the user's comfort zone; Fig. 4 shows a flowchart when the seat is occupied; Fig. 5 shows a flowchart when the seat is occupied; Fig. 6 shows a flowchart of a method for operating a seat in an overall overview; Fig. 7 shows a flowchart of a method for operating a seat in a bottom view; Fig. 8 shows a flowchart of a method for operating a seat in a bottom view; Fig. 9 shows a flowchart of a method for operating a seat in a bottom view; Fig.Fig. 10Flow diagram of a method for operating a seat in a bottom view; Fig. 11Schematic representation of the various cases in a method for operating a seat; Fig. 12Schematic representation of the various cases in a method for operating a seat.

[0072] In the Figures 1a , 1b , 1c and 2the structure of a seat (1) or a seat element (2) is shown. Such a vehicle seat (1) comprises at least one seat element in which at least one heating device (10) and at least one ventilation device (11) are provided, wherein the vehicle seat (1) comprises a sensor device (6) which has at least one temperature sensor (7) and at least one humidity sensor (8), wherein a regulating / control device (9) controls or regulates the heating device (10) and / or the ventilation device (11) based on the data from the sensor device (6) regarding the comfort parameters, temperature and / or humidity content, whereby the seat climate can be actively controlled or regulated.

[0073] The control device (9) has a memory device (9a) in which setpoints or setpoint ranges for the comfort parameters or setpoints or setpoint ranges for combinations of comfort parameters are stored. The control device (9) compares the data provided by the sensor device (6) with the corresponding setpoints or setpoint ranges.

[0074] The vehicle seat (1) comprises two seat elements (2, 2a, 2b), wherein one seat element (2a) is a lower seat part (16) and the other seat element (2, 2b) is a backrest element (17). This is shown in Figure 1b and 1c shown. In Figure 1a only one seat element (2, 2a, 2b) is shown in the form of a lower seat part (16).

[0075] The sensor device (6) comprises at least one temperature sensor (7) and at least one humidity sensor (8) for the lower seat part (16) and at least one temperature sensor (7a) and at least one humidity sensor (8a) for the backrest element (17).

[0076] The seat elements (2, 2a, 2b) each comprise a height direction Z, Z'. The height direction Z, Z' is to be understood such that the uppermost layer of the seat element (2, 2a, 2b) is the one in contact with the user, and the lowermost element is the one furthest from the user. Furthermore, the seat elements (2, 2a, 2b) each comprise a longitudinal direction X, X' and a width direction Y, Y'.

[0077] The at least one seat element (2, 2a, 2b) comprises a first layer (3, 3a) made of a material that can absorb and conduct moisture, wherein the material of the first layer (3, 3a) is porous and / or open-pored. A surface (4, 4a) of the first layer (3, 3a) is in direct contact with the user or in close proximity to the user when the seat is occupied. It may also be advantageous for this first layer (3) to be covered by a cover, for example a fabric cover.

[0078] The sensor device (6) comprises at least one temperature sensor (7) and / or at least one humidity sensor (8), which is arranged in the at least one seat element (2, 2a, 2b) such that the comfort parameters temperature and / or humidity can be detected at or near the surface (4, 4a) of the at least one seat element (2, 2a, 2b). The at least one temperature sensor (7, 7a) and / or the at least one humidity sensor (8, 8a) is arranged in and / or above and / or below the first layer (3, 3a), wherein the regulating / control device (9) evaluates the data transmitted by the sensor device (6) as a function of the distance of the respective sensor (7, 7a, 8, 8a) from the surface (4, 4a) of the at least one seat element (2, 2a, 2b) in contact with the user.

[0079] The sensor device (6) is signal-connected to a control device (9). The control device (9) controls the at least one heating device (10, 10a) and / or the at least one ventilation device (11, 11a).

[0080] In the Figures 1a , 1b and 2It can be seen that at least one heating device (10, 10a) is arranged below the first layer (3, 3a) in the vertical direction (Z, Z') of the seat element (2, 2a, 2b). The term "below" the first layer (3, 3a) is to be understood to mean that at least one heating device (10, 10a) can be arranged directly below the first layer (3, 3a) or that further layers with different functionalities and properties can be present between the first layer (3, 3a) and the at least one heating device (10, 10a). Advantageously, the at least one heating device (10, 10a) is arranged flatly, preferably over the entire surface, below the first layer (3, 3a).

[0081] According to a further embodiment, a spacer fabric (12, 12a) is arranged below the first layer (3, 3a) in the vertical direction (Z, Z') of the seat element (2, 2a, 2b). The term "below" the first layer (3, 3a) is again to be understood to mean that the spacer fabric (12, 12a) can be arranged directly below the first layer (3, 3a) or that further layers with different functionalities and properties, or the heating device (10, 10a), can be present between the first layer (3, 3a) and the spacer fabric (12, 12a).

[0082] Furthermore, a shaped element (13, 13a) is arranged at least partially beneath the spacer fabric (12, 12a) in the height direction Z, Z' of the seat element (2, 2a, 2b). Such a shaped element (13, 13a) has a fan region (14, 14a) in which a plurality of ventilation ducts (15, 15a) are provided. The shaped element (13, 13a) has a region (18, 18a) bordering the fan region (14, 14a). This bordering region (18, 18a) can extend along the width direction Y, Y' as well as along the longitudinal direction X, X'. The bordering region (18, 18a) extending along the longitudinal direction X, X' is designed as side cheeks.

[0083] The ventilation ducts (15, 15a) are connected to the ventilation device (11, 11a). In the embodiment according to Figure 1b A ventilation device (11, 11a) is provided for the lower seat part (16) and for the backrest element (17). In the embodiment according to Figure 1cBoth the lower seat part (16) and the backrest element (17) are connected to a single ventilation device (11). A locking device (19) is advantageously provided, by means of which the respective connecting channels between the ventilation device (11) and the respective seat element (2, 2a, 2b) can be locked. This locking device (20) can be used to determine which seat element (2, 2a, 2b) is ventilated. If necessary, both seat elements (2, 2a, 2b) can also be ventilated simultaneously. The locking device (20) is signal-connected to the regulating / control device (9) and is controlled by it.

[0084] The spacer fabric (12, 12a) and the fan area (14, 14a) are arranged flatly, preferably over the entire surface, under the heating device (10, 10a) or the first layer (3, 3a).

[0085] The seat element (2, 2a, 2b) can also have additional layers located below, above, or between the aforementioned components. These layers can be of different construction and possess different properties. It is also possible that the described seat structure can be composed differently in terms of its position and layout depending on the components described.

[0086] Two or more heating devices (10, 10a) can also be provided in the seat element (2, 2a, 2b) in order to achieve a greater distance from the surface (4, 4a) and to be able to better use the boost function described below.

[0087] Finally, the sensor device (6) comprises a seat occupancy sensor (19) which detects the seat occupancy.

[0088] In Figure 3The comfort parameters and a corresponding comfort range of a seating element (2, 2a, 2b) are shown. The comfort temperature range is advantageously between 28°C and 38°C. The comfort humidity range is between 50% and 80% relative humidity. In a defined state 1, the comfort parameters are above the user's comfort range. If the comfort parameters are within the comfort range, state 2 is present. In a state 3, the comfort parameters are below the user's comfort range.

[0089] In Figure 4A possible winter situation is shown. The seat has overheated due to the previous manual setting of the seat heating. The user therefore also overheats due to body contact with the seat element (2, 2a, 2b). Accordingly, the user sweats. The moisture is absorbed by the first layer (3, 3a) of the seat element (2, 2a, 2b). The boost function, which is described below, allows the seat element (2, 2a, 2b) to be dried quickly. This allows an ideal temperature of 35.5 °C and an ideal relative humidity of 65% to be set. In the scenario according to Figure 5 The seat element (2, 2a, 2b) is cold. The driver becomes hypothermic due to body contact with the seat element (2, 2a, 2b), as this transfers body heat to the seat (1). The heating element (10, 10a) can heat the seat element accordingly.

[0090] In Figure 6A corresponding flow chart for a method for preferential operation of a seat (1) is shown in an overall overview. Figures 7 to 10 show the corresponding sub-overviews. The procedure preferably offers the following modes: Air conditioning with boost function ( Figure 7 ), Refreshing ( Figure 8 ), cleaning ( Figure 9 ), disinfection ( Figure 9 ) and air conditioning with precondition ( Figure 10 ).

[0091] Advantageous cleaning of the seat (1) can be achieved by activating the heating device (10, 10a) and the ventilation device (11, 11a). Cleaning of the seat (1) can preferably occur after no seat occupancy has been detected. For this purpose, the first layer (3, 3a) is advantageously heated by the heating device (10, 10a). As a result of the heating, at least some of the moisture contained in the first layer (3, 3a) changes into the gaseous state, depending on the temperature. In addition, the air in the first layer (3, 3a) is heated, which can thus absorb more moisture. A vapor is thus generated in the first layer (3, 3a). Ideally, such a vapor can be a purely gaseous phase or a mixture of liquid and gaseous components.The ventilation device (11, 11a) extracts the steam from the seat element (2, 2a, 2b) through the spacer fabric (12, 12a) and the fan area (14, 14a) or the ventilation ducts (15, 15a). Alternatively, in "disinfection" mode, the first layer (3, 3a) can be heated to a temperature above 80°C. This effectively kills any bacteria present.

[0092] In the preferred mode "Refreshing" ( Figure 8), the humidity sensor (8) detects a relative humidity in the first layer (3, 3a) that lies above the comfort range. By advantageously alternating activation of the heating device (10, 10a) and the ventilation device (11, 11a) by the control device (9), the relative humidity can be quickly regulated back to a value within the comfort range. Heating, in turn, creates vapor, or rather, vapor pressure, in the seat element (2, 2a, 2b). By alternately activating the ventilation device (11, 11a), this vapor can be distributed in the first layer (3, 3a) and quickly extracted. The "refreshing" mode is preferably carried out when the seat is unoccupied.The first layer (3, 3a) can advantageously be heated to a higher temperature, allowing more liquid to enter the gas phase, or the air in the first layer (3, 3a) to absorb even more liquid. The seat element (2, 2a, 2b) can thus be quickly returned to the comfort zone during a break in occupancy.

[0093] In case of a detected seat occupancy, a preferential air conditioning of the seat (Figure 7) can take place. Furthermore, such air conditioning can take place after a corresponding advantageous preconditioning, which was carried out before the seat occupancy ( Figure 8 In the "Air Conditioning" mode, the comfort parameters temperature and relative humidity are detected by the temperature sensor (7, 7a) and the humidity sensor (8, 8a).

[0094] The corresponding preferred case constellations (F1 to F9) are in Figure 11shown. Thus, at a temperature below a minimum temperature (Tmin), the heating device (10, 10a) is activated until the specified comfort value is reached.

[0095] The boost function is preferably activated when the detected relative humidity is above the comfort range, or a maximum value (RHmax). At the same time, the temperature is in or above the comfort range, i.e., a maximum temperature (Tmax). These are cases F1 and F2. This boost function is intended to prevent an additional temperature increase at the surface (4, 4a) of the first layer (3, 3a).

[0096] For this purpose, the heating device (10, 10a) is preferably switched on and off at predetermined intervals. Advantageously, the heating device (10, 10a) is switched on at intervals such that there is essentially no temperature increase of the surface (4, 4a) of the first layer (3, 3a). Typically, the heat propagation is inversely proportional to the heat propagation length, which in this case is the height (h) of the first layer (3, 3a).

[0097] A heat conduction is advantageously determined from the thermal coefficient of the first layer (λ), the temperature difference (T) between the heating element and the surface of the first layer and the height (h) as follows: λ * T * 1 / h .

[0098] The interval length is therefore preferably dimensioned such that the heating device is deactivated before a significant amount of heat reaches the surface (4, 4a) of the first layer (3, 3a). An interval length can therefore be dimensioned such that no significant temperature change occurs on the surface of the seating element that is perceived by the user. A significant temperature change is understood to be a change of 0°C-10°C, preferably of 0°C-5°C, more preferably of 0°C-2.5°C, more preferably 0°C to 1°C. Humans detect heat very late, i.e. the surface temperature can be exceeded briefly without the user noticing.

[0099] However, the amount of heat introduced into the first layer (3, 3a) is sufficient to generate a sufficient amount of vapor, which can then be extracted by the ventilation device (11, 11a). By advantageously repeating the activation of the heating element several times, the moisture in the first layer (3, 3a) can be heated. Thus, vapor can be generated which consists of a gas phase and possibly a liquid phase. This vapor can then be extracted by the ventilation device until the detected humidity value corresponds to a predetermined value within the comfort range. While the heating device (10, 10a) is activated, the ventilation device (11, 11a) can be operated continuously. It would also be conceivable for the ventilation device (11, 11a) to be activated or deactivated alternately with the heating device (10, 10a).

[0100] In case F3, although the relative humidity is above the comfort range, the detected temperature value is below the minimum temperature value (Tmin). Therefore, the boost function is not applicable here, since the intention is to supply a certain amount of heat to the surface (4, 4a) of the first layer (3, 3a).

[0101] In case F4, the detected temperature is above the maximum temperature value (Tmax). However, the detected relative humidity is within the comfort range. By activating the ventilation device (11, 11a), the temperature can be reduced accordingly. Accordingly, the heating device (10, 10a) is not activated.

[0102] In case F5, both the detected temperature and the detected relative humidity are within the comfort range. Therefore, neither the ventilation system (11, 11a) nor the heating system (10, 10a) are activated.

[0103] In case F6, the detected relative humidity is within the comfort range, but the detected temperature is too low. Therefore, only the heating device (10, 10a) is activated.

[0104] In case F7, the detected temperature is above the comfort range and the detected relative humidity is below the comfort range. For cooling, only the ventilation system (11, 11a) is activated.

[0105] In case F8, the detected temperature is within the comfort range and the detected relative humidity is below the comfort range. Neither the heating device (10, 10a) nor the ventilation device (11, 11a) are activated.

[0106] Finally, in case 9, the detected relative humidity and temperature are below the comfort range. Therefore, only the heating device (10, 10a) is activated.

[0107] Furthermore, a preconditioning of the seat element (2, 2a, 2b) can preferably take place before the seat is occupied ( Figure 10 ). In the event of a predeterminable start event, the control device (9) regulates or controls the comfort parameters of the seat element (2, 2a, 2b) within the comfort range. Such a start event can be, for example, unlocking the vehicle or the user approaching the vehicle, which is detected by a corresponding sensor. Alternatively, the comfort parameters can also be set to a comfort range within a predefined time. For example, the heating device (10, 10a) can be activated after the start event in order to bring the surface (4, 4a) into the comfort range.

[0108] In Figure 12 shows how the comfort parameters change in the different modes by activating the heating device (10, 10a) or the ventilation device (11, 11a).

[0109] In order to make better use of the boost function, it may be advantageous if two or more heating devices (10, 10a) are provided in the seat element (2, 2a, 2b).

[0110] The "Refreshing", preconditioning and disinfection modes can also be performed on seating elements that only have a heating device.

[0111] Similarly, preconditioning can also be performed on a seating element (2, 2a, 2b) that only has a ventilation device (11, 11a, 11b). For example, the seating element can be cooled accordingly in summer. List of reference symbols

[0112] 1 Seat 2, 2a, 2b Seat element 3, 3a First layer 4, 4a Surface 6 Sensor device 7, 7a Temperature sensor 8, 8a Humidity sensor 9 Regulating / control device 9a Storage device 10, 10a Heating device 11, 11a Ventilation device 12, 12a Spacer fabric 13, 13a Shaped element 14, 14a Fan area 15, 15a Ventilation ducts 16 Lower seat part 17 Backrest element 18, 18 Surrounding area 19 Seat occupancy sensor 20 Locking device Z Height direction of the lower seat part Z' Height direction of the backrest element XLongitudinal direction of the lower seat part X' Height direction of the backrest element Y Width direction of the lower seat part Y' Width direction Backrest element hHeight of the first layer

Claims

1. Vehicle seat (1) comprising at least one seat element (2, 2a, 2b) in which at least one heating device (10, 10a) and at least one ventilation device (11, 11a) is provided, wherein the vehicle seat (1) comprises a sensor device (6) which has at least one temperature sensor (7, 7a) and at least one humidity sensor (8, 8a), wherein an open-loop / closed-loop control device (9) controls the heating device (10, 10a) and / or the ventilation device (11, 11a) on the basis of the data of the sensor device (6) with respect to the comfort parameters temperature and / or humidity content, whereby the seat climate can be actively controlled, characterised in that the at least one seat element (2, 2a, 2b) comprises a first layer (3, 3a) which consists of a material which can absorb and transmit moisture, wherein the material of the first layer (3, 3a) is porous and / or open-pored, wherein the at least one seat element (2, 2a, 2b) can be heated by at least one heating device (10, 10a), whereby moisture absorbed in the first layer (3, 3a) changes at least into a gaseous state and the air located in the seat element (2, 2a, 2b) is heated, wherein the vapour generated by the heating can be conveyed out of the seat element (2, 2a, 2b) by means of the ventilation device, wherein the vapour is drawn out of the seat element (2, 2a, 2b) by means of the ventilation device (11, 11a).

2. Vehicle seat (1) according to claim 1, characterised in that the open-loop / closed-loop control device (9) has a memory device (9a), in which setpoint values or setpoint range e for the comfort parameters or setpoint values or setpoint ranges for comfort parameter combinations are stored , wherein the open-loop / closed-loop control device (9) compares the data provided by the sensor device (6) with the corresponding setpoint values or setpoint ranges.

3. Vehicle seat (1) according to claim 1 or 2, characterised in that the vehicle seat (1) comprises two seat elements (2, 2a, 2b), wherein one seat element (2a) is a lower seat piece (16) and the other seat element (2, 2b) is a backrest element (17), wherein the sensor device (6) comprises at least one temperature sensor (7) and at least one humidity sensor (8) for the lower seat piece (16) and at least one temperature sensor (7a) and at least one humidity sensor (8a) for the backrest element (17).

4. Vehicle seat according to one of the preceding claims, characterised in that a surface (4, 4a) of the first layer (3, 3a) is in direct contact with the user or in close proximity to the user when the seat is occupied.

5. Vehicle seat according to one of the preceding claims, characterised in that the at least one temperature sensor (7, 7a) and / or the at least one humidity sensor (8, 8a) are arranged in the at least one seat element (2, 2a, 2b) in such a way that the comfort parameters temperature and / or humidity can be detected at or near the surface (4, 4a) of the at least one seat element (2, 2a, 2b), wherein the at least one temperature sensor (7, 7a) and / or the at least one humidity sensor (8, 8a) is arranged in and / or above and / or below the first layer (3, 3a), wherein the open-loop / closed-loop control device (9) analyses the data transmitted by the sensor device (6) as a function of the distance of the respective sensor (7, 7a, 8, 8a) to the surface (4, 4a) of the at least one seat element (2, 2a, 2b) that is in contact with the user.

6. Vehicle seat according to one of claims 4 to 5, characterised in that a knitted spacer fabric (12, 12a) is arranged under the first layer (3, 3a) in the height direction (Z, Z') of the at least one seat element (2, 2a, 2b) , wherein a heating device (10, 10a) is arranged between the first layer (3, 3a) and the knitted spacer fabric (12, 12a).

7. Vehicle seat according to claim 6, characterised in that in the height direction (Z, Z') of the at least one seat element (2, 2a, 2b) a shaped piece (13, 13a) is arranged at least in sections under the knitted spacer fabric (12, 12a), which shaped piece has a ventilator region (14, 14a), in which a plurality of ventilation ducts (15, 15a) is provided, wherein the ventilation ducts (15, 15a) are connected to the at least one ventilation device (11, 11a), wherein the shaped piece (13, 13a) has a region (18, 18a) surrounding the fan region (14, 14a).

8. Vehicle seat (1) according to one of the preceding claims, characterised in that the change in aggregate state results in a cooling of the surface of the seat element (2, 2a, 2b) due to the heat of vaporisation to be applied, wherein a differential pressure prevails with respect to the surrounding air volume due to the increased temperature of the vapour, which favours the removal of the vapour.

9. Vehicle seat according to one of the preceding claims, characterised in that the sensor device (6) comprises a seat occupancy sensor (19), which detects the seat occupancy.

10. Vehicle seat according to one of the preceding claims, characterised in that the seat climate is controlled by alternately heating and ventilating the first layer (3, 3a), wherein the at least one heating device (10, 10a) and / or the at least one ventilating device (11, 11a) can be switched on or off at predetermined intervals, wherein the at least one heating device (10, 10a) can be switched at intervals in such a way that essentially no temperature change occurs on the surface (4, 4a) of the seat element (2, 2a, 2b) .

11. Method for operating a vehicle seat (1), in particular a vehicle seat according to one of the preceding claims 1 to 9, wherein the vehicle seat (1) comprises at least one seat element (2), in which at least one heating device (10) and at least one ventilation device (11) is provided, wherein the method comprises the following method steps: a) Acquisition of sensor data by the sensor device (6), which has at least one temperature sensor (7) and at least one humidity sensor (8); b) Optional comparison of the recorded sensor data with predetermined target values by the open-loop / closed-loop control device (9); c) Activation of at least one heating device (10, 10a) and / or at least one ventilation device (11, 11a) by the open-loop / closed-loop control device (9), wherein the at least one seat element (2, 2a, 2b) comprises a first layer (3, 3a) which consists of a material which can absorb and transmit moisture and the material of the first layer (3, 3a) is porous and / or open-pored, wherein the at least one seat element (2, 2a, 2b) can be heated by at least one heating device (10, 10a), whereby moisture absorbed in the first layer (3, 3a) changes at least into a gaseous state and the air located in the seat element (2, 2a, 2b) is heated, wherein the vapour generated by the heating can be conveyed out of the seat element (2, 2a, 2b) by means of the ventilation device, wherein the vapour is drawn out of the seat element (2, 2a, 2b) by means of the ventilation device (11, 11a).

12. Method according to claim 11, characterised in that when the seat is not occupied, an antibacterial cleaning of the seat element is carried out by the open-loop / closed-loop control device (9), in which the at least one heating device (10) is activated so that the at least one seat element is brought to a temperature at which bacteria and germs are killed, this temperature being above 80°C .

13. Method according to one of claims 11 to 12 characterised in that when the seat is occupied, the at least one heating device (10, 10a) and the at least one ventilation device (11, 11a) are activated by the open-loop / closed-loop control device (9) at alternating intervals, the interval length for activation of the at least one heating device (10, 10a) being designed such that essentially no temperature change takes place on the surface (4, 4a) of the seat element (2, 2a, 2b).

14. Method according to one of claims 11 to 13, characterised in that when the seat is not occupied, the at least one heating device (10, 10a) and the at least one ventilation device (11, 11a) are activated by the open-loop / closed-loop control device (9) at alternating intervals, wherein the interval length for activation of the at least one heating device (10, 10a) is designed such that the at least one seat element is heated to a temperature which is above a predetermined comfort range, wherein the comfort range of the temperature is between 28°C and 38°C.

15. Method according to one of claims 11 to 14, characterised in that a preconditioning of the at least one seat element (2, 2a, 2b) takes place when a predetermined start event occurs, in which preconditioning the comfort parameters are brought into the predetermined comfort range by activating the at least one heating device (10, 10a) and / or the at least one ventilation device (11, 11a) by the open-loop / closed-loop control device (9).