Abstract:
A transformer, particularly a seat transformer, for a sitting device, comprising at least one transformation unit, which has at least one input and at least one output. According to the invention, the transformation unit is provided for transforming a low voltage present at the input.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a U.S. national stage application of PCT/EP2008/000087 filed on Jan. 9, 2008, and claims priority to, and incorporates by reference, German patent application No. 10 2007 003 043.8 filed on Jan. 20, 2007. 
     BACKGROUND 
     The invention is based on a transformer. 
     Seat transformers which are arranged inside a seat and have a transformation unit which has an input and an output and is intended to transform an AC voltage of 115 V at 400 Hz, which is applied to the input, into a DC voltage of 24 V are already known. 
     SUMMARY 
     The invention is based on a transformer, in particular a seat transformer, for a seat, having at least one transformation unit which has at least one input and at least one output. 
     It is proposed that the transformation unit is intended to transform a low voltage applied to the input. In this case, a low voltage is supposed to be understood as meaning, in particular, a voltage of less than 50 V and, in particular, a DC voltage. The term “intended” is supposed to be understood as meaning, in particular, “specially designed”, “equipped” and/or “programmed”. Furthermore, a “seat transformer” is supposed to be understood as meaning, in particular, a unit which is integrated inside a seat, in particular inside an aircraft seat, or is specially designed for appropriate integration. 
     A corresponding refinement according to the invention makes it possible to at least reduce high-voltage lines inside a seat. 
     Furthermore, it is proposed that the transformer has at least one processor unit. In this case, a “processor unit” is supposed to be understood as meaning, in particular, a unit having a processor or a computation unit and a memory unit which stores an operating program. A processor unit makes it possible to advantageously increase the flexibility of the transformer, to be precise particularly if the transformer has at least one data interface, that is to say a data input interface and/or a data output interface via which different data which appear to be useful to a person skilled in the art can be supplied to the transformer and/or can be retrieved from the latter, for example control data, monitoring data, diagnostic data etc. The data interface allows online monitoring, diagnosis and/or control etc. In this case, the data interface can be designed for data transmission with and/or else without a line or for wireless transmission, for example by radio. 
     Another refinement proposes that the transformer has an input and/or output unit, in which case an “input and/or output unit” is supposed to be understood as meaning, in particular, a unit which is specifically designed to allow an end user, for example a passenger sitting on the seat and/or a person looking after a passenger sitting on the seat, to make an input, in particular a selection and/or a data input, and to allow data to be output to an end user. An appropriate input unit makes it possible to specifically adapt the transformer to current boundary parameters, to be precise particularly if the input unit is intended to select an output variable, for example an output voltage, such as a DC or an AC voltage, an output frequency etc. In particular, it is also possible to specifically integrate a disconnection function in order to avoid undesirable use. 
     It is also proposed that the transformation unit is at least partially integrated in an output connection unit. In this case, an “output connection unit” is supposed to be understood as meaning, in particular, a unit which is intended to allow an end user to connect an electrical load and, in particular, to have connection means for this. Furthermore, the term “integrated” is supposed to be understood as meaning, in particular, that the transformation unit is at least partially integrally formed with the output connection unit and/or forms an assembly unit with the latter. An appropriate refinement makes it possible to save on additional components, weight, assembly and/or costs. 
     If the processor unit is intended to set a characteristic variable in at least partially automated fashion on the basis of at least one parameter, in particular an output variable, comfort can be increased further and, in particular, power consumption can be optimized, to be precise preferably by virtue of the fact that power consumption peaks can be counteracted in at least partially automated fashion. The processor unit can advantageously be intended to limit power tapping from a particular level of the latter by supplying power only in clocked fashion etc. 
     If the transformer is coupled to a seat control unit, to be precise particularly in terms of data technology, current parameters of the seat control unit can advantageously be taken into account in the transformer and/or current parameters in the transformer can be advantageously taken into account in the seat controller. 
     If the transformer is at least partially integrally formed with a seat control unit, it is again possible to save on additional components, weight, assembly and/or costs. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further advantages emerge from the following description of the drawings. The drawings illustrate one exemplary embodiment of the invention. The drawings, the description and the claims contain numerous features in combination. A person skilled in the art will expediently also consider the features individually and will combine them to form expedient further combinations. 
       In the drawings: 
         FIG. 1  shows a side view of a diagrammatically illustrated aircraft seat, 
         FIG. 2  shows an enlarged section of a console in the seat from  FIG. 1  from above, and 
         FIG. 3  shows a diagrammatic illustration of a seat transformer and a seat control unit of the seat from  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows a side view of an aircraft seat  10  having a seat structure  48  inside which a backrest  28  and a seat base (not illustrated in any more detail) are arranged. The seat  10  comprises a console  54  and an output connection unit  24  which is integrated in the latter and has connection points  36 - 42  for electrical loads belonging to passengers ( FIGS. 1 to 3 ). A transformation unit  16  of a seat transformer according to the invention is in turn integrated in the output connection unit  24  or the transformation unit  16  is arranged in a housing of the output connection unit  24  and the output connection unit  24  forms an assembly unit with the transformation unit  16 . The transformer is connected to cable harnesses which are intended for actuators which can be used to adjust the seat. 
     The transformation unit  16  has an input and a plurality of outputs  14  and is intended to transform a low voltage applied to the input  12 . The transformation unit  16  is coupled to a seat control unit  26  which is intended, in particular, to control movement of the seat base and the backrest  28 . A transformation unit  30  having an input  32  and an output  34  is integrated in the seat control unit  26 . An AC voltage of 115 V at 400 Hz is applied to the input  32 , the transformation unit  30  transforming the AC voltage into a DC voltage of 24 V which is in turn applied to the input  12  of the transformation unit  16 . 
     The transformation unit  16  comprises a processor unit  18  having a processor  44  and a memory unit  46  with an operating program stored therein, and a data interface  20 . The data interface  20  and data lines are used to couple the transformation unit  16  to an input and output unit  22  of the transformer, said input and output unit being formed by a touchscreen or by a touch-sensitive screen, being integrated in the output connection unit  24  and making it possible for an end user, in particular a passenger, to select output variables such as voltage level, type of voltage, that is to say DC voltage or AC voltage, and a desired frequency for the connection points  36 ,  38 ,  40 ,  42  from a menu. The selected output variables are then set under processor control using the processor unit  18 . Information relating to the transformation unit  16 , in particular relating to possible voltages which can be selected, is also output to the passenger via the input and output unit  22 . 
     The transformation unit  16  is also connected to the seat control unit  26 , to a central input and output unit  50  inside the aircraft and to an aircraft data bus system  52  via the data interface  20  and data lines. 
     The input and output unit  50  which is intended to be operated by an end user, to be precise particularly by a person looking after passengers, can be used by the person looking after the passengers to see data relating to the transformation unit  16  and to make settings. In particular, it is also possible to prevent power being delivered. 
     The processor unit  18  is also used to set characteristic variables in automated fashion and on the basis of parameters, to be precise possible delivery of power is set, in particular, on the basis of the current power consumption of the seat  10  and on the basis of the current power consumption inside an aircraft cabin of the aircraft. If there is a high power consumption, for example when a large number of actuators are driven using the seat control unit  26 , power is delivered only in clocked fashion, for example at a connection point for a laptop. If the power consumption exceeds a particular level, the delivery of power is prevented completely. Data for the automated setting operation are supplied to the processor unit  18  via the data interface  20 . If the delivery of power is clocked or prevented completely, the processor unit  18  outputs corresponding information to the passenger via the input and output unit  22 .