The present invention relates to an air conditioning device for climate control of a space, in particular of a vehicle interior space, having the features of the preamble of patent claim 1.
In known vehicle air conditioning systems, there is often the problem that the air supply ducts between the fan, the heat exchanger and the heating device have a plurality of deflections, which can lead to relatively severe throttling of the airflow and to pronounced noise generation. Further parameters which can prevent or hinder a favorable air profile are the installation conditions in the vehicle. It is often not possible to obtain the desired rectilinear air paths on account of the space available.
In known air conditioning systems, cold and warm air is guided into a mixing space, from where the air is conducted to the outflow openings in the direction of the vehicle interior space. From a temperature mixing space which is situated lower down, the air flows upward to the defrosting and ventilation nozzles. The air must be conducted downward again in the direction of the footwell. Said deflections are unfavorable because of the pressure drop they cause and with regard to acoustics. This relates in particular to the long deflection paths to the outflow openings in the footwell.
The present invention is based on the object of providing an air conditioning system for maintaining the temperature in, or providing climate control of, the interior space, which air conditioning system is optimized with regard to its flow conditions and acoustics.
Said object is achieved by the subject matter of the independent patent claim. Features of advantageous refinements of the invention can be gathered from the dependent claims.
In an air conditioning device according to the invention as per patent claim 1, an air guiding duct runs largely rectilinearly and without deflection between a heat exchanger and a heating device. In this way, the air path in the air conditioning system can be kept very short and direct, so that both a pressure drop and the generation of noise as a result of excessively severe deflections of the air path can be avoided. In the air conditioning system according to the invention, the heating body is situated directly downstream of the evaporator, so that no deflections are necessary between them. The heating body is closed or opened by means of a flap, a closable sliding device or the like. If said heating body is supplied with electrical current, it heats the air. Said flap can be a rolling tape or a moveable flap or can be formed from a plurality of relatively small flaps which are coupled to one another by means of a kinematic arrangement.
A variably closable bypass duct for feeding cold air can also be provided in the air guiding duct parallel to the heating device, the air guiding duct likewise running largely rectilinearly and without deflection between the heat exchanger and the bypass duct. Flow losses and noise generation as a result of relatively severe deflection of the air guiding duct are avoided in this way. A closure device, which can be variably adjusted between a closed position and an opened position, is preferably arranged within the bypass duct. A further closure device, which can be variably adjusted between a closed position and an opened position, for metering warm air can be arranged upstream or downstream of the heating device. It is possible for said further closure device in the warm air duct to be formed from a plurality of pivoting flaps which are coupled together or, for example, to be formed from one or more flaps which can be moved and/or partially rolled up.
The pivoting flaps in the bypass duct need not be as compact as the closure device for the heating body, since more space is available here.
A significant aspect of the invention is the heating body arranged directly downstream of the evaporator, said heating body having very compact closure devices. There are no significant deflections in the air guidance between the heating body and the evaporator. In addition, a V-shaped conducting device for the cold air is situated in the bypass duct. This divides the cold air into two flows which can selectively be conducted upward or downward. The space between the two cold air paths is utilized for the distribution of the warm air flow which flows from the heating body. The two warm air outlets in the footwell and in the region of the windows are therefore arranged centrally, while the cold air paths run laterally. In order to maintain the temperature of the air, the central V-shaped region is embodied as a stratification duct which is actuated by means of a flap. Said stratification duct guides the cold air into the central region of the system where it can be deflected in the desired direction.
The invention is explained in more detail in the following in terms of preferred exemplary embodiments on the basis of the associated drawings, in which:
A plurality of outflow openings 30, 32, which are variably closable by means of pivotable flaps 34, 36, are provided downstream of the heating body 18 and downstream of the stratification duct 24.
The schematic diagrammatic illustration of
Finally,
Number | Date | Country | Kind |
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04290598.4 | Mar 2004 | EP | regional |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2005/002235 | 3/3/2005 | WO | 00 | 4/17/2008 |