Air conditioning process and device to control the air conditioning in the interior of, in particular, a vehicle.

The invention relates to a method for controlling the climate an interior space in particular of a vehicle, a Cooling device with an evaporator and with a Heating is provided and with an actuator for Influencing same, where a desired value for a Interior temperature is set, in which an actual value of Interior temperature is measured, and wherein in Depending on the target value and the actual value of the a Actuator manipulated variable influencing is determined.

The invention further relates to a Air conditioning apparatus, in particular a vehicle with an evaporator and with a heating and a Actuator for influencing same, and with a Control device, influencing the one actuator Manipulated variable in dependence upon a predeterminable desired value for an internal space temperature and a measurable actual value for the Interior temperature can be determined.

Such a method and such The air conditioning apparatus is known from German Offenlegungsschrift DE 42 14 686 A1 known. There a place Desired-actual value comparison with a subsequent regulation of the Interior temperature instead. The resulting manipulated variable provides a target signal for a subsequent Ausblastemperaturregler is, the further than actual signal a measured outlet temperature is supplied. The of the Ausblastemperaturregler generated output is with a pilot signal linked to thereafter the actuator of influencing climate control device. The Pilot signal from the parameters determined air-conditioning device and is used to Including any interference that the Air conditioning device acting.

The object of the invention is a method and a The air conditioning apparatus of the type mentioned in With a view to a more careful consideration of the disturbances to improve.

This object is in a process or in a The air conditioning apparatus of the type mentioned inventively achieved in that the manipulated variable with a dependent of the air conditioning device control quantity is linked.

It is thus not only as in the described prior Technology, the output of a Ausblastemperaturregelung associated with a pilot signal, but it is According to the invention already the manipulated variable of Interior temperature control supplied with the disturbance. It has been found that in this way Accuracy of the account of the interference significantly is improved.

In particular, by the linking of the Interior temperature control generated manipulated variable with a dependent of the air conditioning device control quantity reached that turning on or off the The air conditioning apparatus almost no effect on the Interior temperature has. In most cases only a slight Readjusting the interior temperature by Interior temperature control required after the Air conditioning device is turned on or turned off.

Furthermore, it has been shown that early by Intrusion of the disturbances on the manipulated variable of Inside temperature control the dynamic behavior of The overall system is substantially improved. Specifically, with the inventive method or the The air conditioning apparatus according to the invention significantly spontaneous reacts to changes in the interior temperature will.

In an advantageous development of the invention is the Control variable depending on an evaporator temperature of Evaporator. It is thus possible, disturbance variables selected from the Evaporator temperature result, according to the invention in which to take into account process and to compensate.

In an advantageous embodiment of the invention, in a recirculation mode, the control variable depending on the Difference between the interior temperature and the Evaporator temperature. In recirculation mode The air conditioning apparatus is no fresh air in from the outside the interior of the vehicle performed. Instead, the Air circulated in the interior.

In another advantageous embodiment of the invention is in a fresh air mode the control amount depending on the difference between outdoor temperature and the Evaporator temperature. In fresh air mode, fresh air supplied from the outside into the interior of the vehicle. In this Case, the difference between the outside temperature Fresh air and the evaporator temperature is important and then influences the manipulated variable of Interior temperature control.

It is particularly expedient when between the control variable and the difference is a linear relationship. It understood, however, that other relationships between may be mentioned sizes available.

In an advantageous development of the invention is the Manipulated variable, along with the control variable before the effect the actuator an outlet temperature control loop supplied. So according to the invention, the interference of Outlet temperature control loop to the control value of Interior temperature control switched. As already was mentioned, this has in particular with regard to the Dynamics of the entire air conditioning apparatus to be particularly suitably exposed.

Further features, application possibilities and advantages of Invention will become apparent from the following description of Embodiments of the invention, which in the figures Drawing are shown. All described or illustrated features alone or in any Combination the subject matter of the invention, regardless of their combination in the claims or their And regardless of their formulation or Representation in the description or in the drawing.<dl tsize="20"><dt>figure 1</dt><dd>shows a schematic block diagram of a Embodiment of the invention Method for climate control of an interior space a vehicle, and</dd><dt>Figures 2a and 2b</dt><dd>show two diagrams to form a control variable for the process of FIG. 1</dd></dl>

In the figure 1 is an interior 1 of a vehicle, in particular a passenger vehicle shown, the a temperature sensor 2 for measuring an interior temperature TII is assigned the interior. 1 Furthermore, a Temperature sensor 3 is shown, which is one for the measurement External temperature TA is provided outside of the inner space the first With the temperature sensors 2, 3 can be, for example, involve ohmic resistors whose resistance value in Depending on the ambient temperature changes.

Furthermore, an input device 4 is provided with of a user a desired interior temperature in TIS may dictate the interior. 1 In the input device 4 it may be for example one in the form of a act potentiometer variable resistor.

When measured by the temperature sensor 2 Interior temperature TII is the actual value of Interior temperature. When from the input device 4 predetermined interior temperature TIS is the Desired value of the interior temperature.

The actual value of the interior temperature TII, the target value of Interior temperature TIS and the outdoor temperature connection TA are fed to a link device 5, of the the said signals are combined. Of the Setpoint of the indoor temperature and the TIS Outside the room- temperature TA are additively taken into account during the actual value of the interior temperature TII is added as a negative value.

The signal generated by the link device 5 is an interior temperature controller 6 is supplied. In this Regulators may be any known control device act, for example, a P-controller.

At the exit of the interior temperature controller 6 is a Manipulated variable Y is available. This manipulated variable means a linking apparatus 7 with a control variable YK connected. The manipulated variable Y and controlled variable YK taking into account additively. As a result, produces the Linking apparatus 7 a signal YTotal.

The signal can YTotal a subsequent subordinate supplied outlet temperature control loop. 8 This Outlet temperature control circuit 8, however, is not mandatory required, but only optional.

The output of the discharge temperature control circuit 8 or - If the outlet temperature control circuit 8 does not exist is - the signal YTotal is an actuator 9 a Cooling device supplied. When actuator 9 is it at airside controlled plant to a temperature mixing valve, at a water-side controlled Conditioning to a water valve of a radiator 10th

The said amendment of the operation of the component 10 due to an adjustment of the actuator 9, in turn, a change in the interior temperature in the passenger compartment to l Episode. Thus, the entire control circuit of Figure 1 closed.

The control variable YK is generated by a block 11th to this Purpose are in the block 11, the diagrams of Figures 2a and 2 b saved. The diagram of Figure 2a relates a fresh air mode the air conditioning apparatus, while the diagram of Figure 2 b a recirculation mode Conditioning device is assigned.

In fresh air mode the air conditioning apparatus, ie when fresh air is supplied from the outside into the internal space 1, according to the Figure 2a, the difference formed from the Outside temperature TA and an evaporator temperature. In the Evaporator temperature is the Operating temperature of the evaporator of the Air conditioning apparatus. From the determined difference the control variable is produced YK, Figure 2a is an example to view.

The control variable is then YK, as also already explained, intruded on the linking device. 7

In recirculation mode the air conditioning apparatus, so if no fresh air enters from the outside into the inner space 1, but the air is only circulated in the interior 1, according to the Figure 2 b the difference between the interior temperature TII and the evaporator temperature is formed. From this Difference is the control variable YK formed for recirculation mode (See FIG. 2b).

the air conditioning apparatus is in Recirculation mode, the control amount to the YK is As described in the figure 2 b is determined and then the linking means 7 switched.

The above-described with reference to Figures 1, 2 a and 2 b The method is implemented by means of a control device. there the control unit can in particular a progammierbaren contain microprocessor or the like, with the Interior temperature controller 6, the linking devices 5 7 and the outlet temperature regulator 8 and, in particular the Block 11 executed for forming the control variable YK can. Further, the control unit having a memory be or the like, in which the plots of Figures 2a and 2b are stored.