EP1791706A2

EP1791706A2 - Modular air conditioning for vehicle

Info

Publication number: EP1791706A2
Application number: EP05793355A
Authority: EP
Inventors: Céline Fuentes; Jean-Luc Jesslen; Henri Klein; Eric Ludmann
Original assignee: Behr France Rouffach SAS
Current assignee: Mahle Behr France Rouffach SAS
Priority date: 2004-09-10
Filing date: 2005-09-07
Publication date: 2007-06-06
Also published as: EP1634735B2; US20080032617A1; PL1634735T3; WO2006027219A2; EP1634735B1; WO2006027219A3; DE502004005568D1; ES2297355T3; EP1634735A1

Abstract

The invention relates to an air.-conditioning unit (1), in particular, a motor vehicle air-conditioning unit, whereby a part of the housing (10) has a different embodiment for air-conditioning units with differing zones and at least the arrangement of a fan (2), an evaporator (4) and a heater (8) is the same for the different-zoned air-conditioning units. The housing (10) of the air-conditioning unit (1) may have various embodiments for different versions and/or may be varied by add-on or exchangeable components and, for a multi-zoned embodiment of the air-conditioning unit (1), a bypass for the floor region is provided in a region of the housing (10), which diverts from the heater (8), whereby said bypass is embodied in a region which is redundant in an air-conditioning unit (1) with fewer zones.

Description

MODULAR MOTOR AIR CONDITIONER

Automotive air conditioning

The invention relates to a motor vehicle air conditioner, wherein a part of the housing is designed differently for different zonige air conditioners, and at least the arrangement of a fan, an evaporator and a heater in the different zonigen air conditioners is the same, the housing of the air conditioner for various Versions varied ausgebil¬ det and / or can be changed by mounting or replacement parts.

From DE 103 45 188 A1 a vehicle air conditioning system is known, in which for independent control of the temperatures of the air, which is blown onto the front and rear seats of a passenger compartment, a vorde¬ re air mixing flap is formed from a film flap with an opening through which air passes. The front air mix door opens and closes a front cooling air bypass passage and a front air passage of a heating heat exchanger. A winding shaft for winding and unwinding the film flap is arranged in a separating section, which comes to lie between the front and a rear air passage of the Heizwärme¬ exchanger. A rear air mix door is also formed as a disc door which is rotatable about a rotary shaft. Such Design serves to reduce the size of the multizone Fahr¬ vehicle air conditioning.

Due to the relatively small numbers of multi-zone air conditioning systems for motor vehicles, their costs are always relatively high, whereas the costs for single-air conditioners are comparatively very low as a result of the very large number of units.

In order to profit from the lower manufacturing costs of the 1-zone and 2-zone air conditioning systems, DE 100 37 384 A1 discloses an automotive air conditioning system in which a supplementary module in the form of a rear temperature control unit can be attached to a simple basic module, wo¬ for the air conditioning housing of the basic module has a closable with a cover part air outlet opening. The rear temperature control unit comprises a second heat exchanger for controlling the temperature of the air to be supplied to the rear compartment. In addition to the front and rear separation, a right-left separation can also be carried out, so that driver and front passenger side can be tempered independently. Here, the second heat exchanger is relatively expensive and also significantly increases the overall weight of the air conditioning system.

Such air conditioners can thus still wishes, especially in terms of manufacturing costs, open.

It is an object of the invention to provide a cost-effective motor vehicle air conditioning available.

This object is achieved by a multi-zone air conditioning with the features of claim 1. Advantageous embodiments are the subject of the dependent claims. According to the invention, an air conditioning system, in particular a motor vehicle air conditioning system, is provided, wherein a part of the housing is designed differently for different air conditioning systems, and at least the arrangement of a fan, an evaporator and a heater is the same for the different zoned air conditioning systems wherein the housing of the Klimaan¬ position for different versions varies and / or modified by Anbau¬ or replacement parts, and wherein in a mehrzonigen embodiment of the air conditioning in a region of the housing a bypass for the rear area is provided, which passes the heater wherein the bypass is formed in a region which is unused in a low-zonal Kli¬ plant - in view of the function of the air conditioner. As a result of the fact that essential areas of the air conditioning system are identical in their one- or two-zone version, as in their multizone version, the production costs, in particular for the multizone version, can be due to a large number of identical parts and one greatly simplified interpretation be reduced.

Preferably, at least one mixing flap is provided which is designed as a butterfly flap. This is preferably the mixing flap for the rear area, wherein the same may also be subdivided in the case of a driver-side and passenger-side subdivision of the rear zone, or two mixing flaps may be provided. Preferably, the mixing flaps for the front region are also butterfly flaps. The butterfly flaps require relatively small actuating forces, so that the drive motors can be kept small. In addition, two spaced-apart openings, such as, for example, the inlet and the exit into the air duct, which leads the air through the heater, can be closed, if designed accordingly.

Preferably, in the multi-zone air conditioning system in the variably designed part of the housing or in the attachment or exchange part, a mixed 09592

- 4 - flap for air temperature control intended for the rear area. In particular, a subdivision of the housing allows for easier assembly of the mixing flap. In the varied trained part of the housing or in Anbau¬ or exchange part are preferably also other flaps, in particular a defrost flap for frost operation, provided.

In the multi-zone air conditioning system, a mixing flap for air temperature control for the rear area and a defrost flap for defrosting are preferably provided in the variably formed part of the housing or in the attachment or exchange part, which are coupled together. Further couplings are possible.

The bypass is preferably arranged in the installed in a motor vehicle condition of the air conditioning system extending below the heater running. This area is in the case of a one or two-tone, simple basic version of the air conditioning usually unused, so that this space is available for a multi-zone air conditioning.

In the following the invention will be explained in detail with reference to embodiments with reference to the drawings. In the drawing show:

1 shows a schematic section through a three- or four-zone automotive air conditioning system according to the first embodiment,

2 is a schematic section through the one or two-tone basic version of the air conditioner of Fig. 1,

3 shows a section through the air conditioner of Fig. 1 in normal mixed operation, 4 shows a section through the air conditioning system of FIG. 1 during defrost operation, FIG.

5 is a sectional view of the air conditioner of FIG. 1 with additional flaps of the multi-zone version shown highlighted;

6 is a perspective partially transparent representation of the air conditioning system of FIG. 1 with highlighted additional flaps of the multizone version, FIG.

Fig. 7 is an illustration of the flap opening angle of the air conditioner of Fig. 1 in various modes, and

Fig. 8 is an illustration of the flap opening angle in the case of

Coupling of the mixing flap for air temperature control for the rear area and the defrost flap for the defrosting operation.

As shown in FIG. 2, a motor vehicle air conditioning system 1 has, in its base version, that is to say for a one- or two-zone embodiment, a fan 2 which is symmetrical according to the present exemplary embodiment, which contains air from the surroundings and / or or the vehicle interior sucks on, a blower 2 downstream filter 3 and an evaporator 4, which cools the air coming from the fan 2. Following the evaporator 4 there is a division of the air flow. Depending on requirements, all or part of the air flow can be fed directly to the vehicle interior, for which purpose a first mixing flap 5 in the form of a butterfly flap is provided. The distribution to the individual air vents, through which the air enters the vehicle interior, then takes place to a mixing chamber 6 by means of a plurality of flaps. The rest of the air flow is controlled by a second mixing flap 7, which also if formed as a butterfly flap, led by a heater 8 and ei¬ nen electric heater 9, in which this air flow is heated. Subsequently, this air flow also passes into the mixing chamber 6, where a demand-based mixing of the air flows takes place. The flaps, which regulate the air flow through the air ducts to the vehicle interior, are in this case designed such that a temperature stratification is also possible.

For the three- or vierzonige embodiment, which is shown in Fig. 1, as far described above, at least the core portion of the motor vehicle air conditioning 1 is formed the same, that among other things that the unit fan 2, filter 3, evaporator 4, Heater 8 and heater 9 essentially, that is, apart from additionally provided partitions or ver¬ changed wall progressions, is unchanged, and that the same flaps are used, in particular the mixing flaps 5 and 7. However, to increase the number of zones, the housing 10 of the air conditioning a little ab¬ changed, in this case by replacement parts and additional fittings, and there are additional flaps provided to regulate the additional air currents to rule. In FIGS. 3 and 4, a dash-dot line respectively indicates the boundary between the region which is identical to the corresponding region A of the basic version and the region B in which changes were made.

Thus, a region 11 of the housing 10, which is arranged in the installed state lieth below the heater 8 and is unge¬ uses in the basic version, in conjunction with a change in the course arranged in this area housing wall 11, which now as a partition 12th serves and the heater 8 and auxiliary heater 9 in terms of the flow path approximately in the middle zweil, and an additionally provided in the mehrzonigen version outer wall 13, used as an additional air duct through which tem¬ perierte air can be fed to the rear area. This air duct is designed such that, if necessary, the cold air under the heater 8 through and past the heater 9, hereinafter also referred to as a bypass, and / or through the heater 8 and the heater 9, hereinafter referred to as Warm¬ air duct, can be passed , In the area in which the bypass and the hot air duct meet again, a rear mixing chamber is provided for mixing the cold and warm air streams. For a mixing position during normal operation, the flow pattern is shown in FIG. The regulation takes place with the aid of a mixing flap 14, which is designed as a butterfly flap. During operation, one wing of the mixing flap 14 closes the air inlet to the heater 8 and closes the bypass past the heater 8 and auxiliary heater 9 during operation "maximally warm", the wing deflecting the air flow towards the heater 8. The other wing of the mixing flap 14 closes in the operating state "cold" the end of the air duct through the heater 8 and heater 9, where it passes the flowing through the bypass air flow, in the operating state "maximum warm" is the wing on the wall of the air duct which separates the outflow through the heater 8 and heater 9 from the return flow of the heated air (see Fig. 4).

Another flap 15, also referred to below as a distribution flap, regulates the exit to the various air ducts leading to the rear area (see FIG. 6). In this case, a plurality of flap elements, in the present case for the ventilation of the rear area and the footwell in the rear area, respectively divided into right and left, are arranged on a shaft, which release or cover different air ducts in a manner known per se. The control of the flap 15 is shown in FIG. 7 in the two upper diagrams.

Further, a flap 16, hereinafter also referred to as a defrost flap, is provided which allows a combination of the warm front and rear air flows, so that for defrosting the entire heater 8 and

Heater 9 Heat to the two air streams separated from the bulkhead and the entire air flow and heating power is available for defrosting or for removing a fog from the windscreen. Since the entire air flow normally supplied to the rear area is supplied to the airflow of the front area, no tempering of the rear area takes place in this operating state. The flap 16 is a simple flap, the pivot axis of which is arranged in the region of the outer wall of the housing 2, at the boundary between the part of the housing 2, that in the basic version and the multi-toned version is present, and the part of the housing 2, which is present only in the multi-zone version, is arranged in the region of the multizone version.

The control of the flap 16 is carried out in response to the control of the flap 15 according to the lowermost diagram of Fig. 7. For the adjustment of the corresponding angular positions an angular stepping motor (not shown) is provided, which via gears with the waves of the flaps 15 and 16 is connected. As can be seen from FIG. 7, in the operating state 100% ventilation (O ₀ ), only the flap elements of the flap 15 are open, which release or close the air ducts for ventilating the rear. In the operating state of 50% ventilation and 50% foot space (CTI), all flap elements of the flap 15 are open approximately 50%. In Betriebszu¬ stand 100% footwell (α ₂ ), only the flap elements of the flap 15 are open, which enable or close the air ducts to the rear footwell. If there is a change to defrost mode, then the flap elements of the flap 15 remain closed, which serve to regulate the rear ventilation, the flap elements, which serve to regulate the footwell ventilation are closed depending on the setting and the flap 16 is accordingly opened, until the end position "Defrost" (α ₃ ) the flap 15 voll¬ constantly closed and the flap 16 is fully open, so that the entire air is provided to the front area. According to a control variant, which is shown in Fig. 8 on the angular position α of the actuator (in this case, a stepper motor), the flaps 14 and 16 are coupled together. Here, as shown in FIG. 8, in the case of the "100% cold" position of the mixing flap 14 (upper curve of FIG. 8) for the rear temperature control, the defrost flap 16 (lower curve of FIG closed (OG _0). Changes the position of the mixing flap 14 of "100% cold" about "50% cold / 50% hot ° to '100% warm", there remains the defrost flap (16 closed on all positions Oc ₁ If a further rotation of the actuator in the same direction, the mixing flap 14 remains in the "100% warm" position, but the defrost flap 16 opens in a present linear relationship with the angular position of the actuator to the end Position (α ₂ ), in which the mixing flap 14 in the position "100% warm" and the defrost flap 16 is fully open (100% Defrostbetrieb -

According to a variant not shown in the drawing, a specially designed housing is provided for the multizone automotive air-conditioning system, in which the components, such as fans, filters, evaporators, heaters, heaters, are arranged according to the arrangement in the basic version. The same flaps are used as in the basic version. Furthermore, additional flaps are provided for the regulation of the air flows to the additional climatic zones. The advantage of a housing designed exclusively for the basic version and only for the extended version is that the air ducts can be designed for the specific application and that additional partitions do not have to be installed by hand. The static calculations and calculations for the flow path up to the splitting of the air flow and, if appropriate, also up to a change in the flow cross section of the air streams separated by a partition, are essentially unnecessary. decision 09592

- 10 - speaking applies to the attachment of the actuators for the flaps, which are identical in both versions. Furthermore, in both Versio¬ NEN essentially the same components can be used, the components that differ, such as the additional Defrost flap in the multi-zone version, are relatively inexpensive, resulting in a considerable price advantage even in the case of different housing ago ¬ conventional vehicle air conditioning systems results.

Claims

1. Air conditioning, in particular motor vehicle air conditioning, wherein a part of the housing (10) for different zonal air conditioning unterschied¬ Lich is formed, and at least the arrangement of a blower (2), an evaporator (4) and a heater (8) at the different zonigen air conditioning systems is the same, wherein the housing (10) of the A / C (1) for different versions is varied and / or by

Attachment or replacement parts can be changed, and wherein in a multizone embodiment of the air conditioner (1) in a region of the housing (10) a bypass for the rear area is provided, which passes the heater (8), wherein the bypass formed in a region is, which is unused in a low-zone air conditioning (1).

2. The air conditioner according to claim 1, characterized in that the air conditioning system (1) has at least one mixing flap (14), which is designed as a butterfly flap.

3. The air conditioner according to claim 2, characterized in that the butterfly flap designed as a mixing flap (14) is the mixing flap for the rear area.

4. The air conditioner according to claim 2 or 3, characterized in that the mixing flaps (5, 7, 14) are designed for the front and the rear area as a butterfly flaps.

5. The air conditioner according to any one of the preceding claims, characterized ge indicates that in the multi-zone air conditioning (1) in the differently formed part of the housing (10) or in cultivation or Austausch¬ part arranged a mixing flap (14) for air temperature control for the rear area is provided.

6. The air conditioner according to any one of the preceding claims, characterized ge indicates that in the multi-zone air conditioning (1) in the differently formed part of the housing (10) or in cultivation or Austausch¬ part arranged flaps (15) for air distribution for ventilation and the foot area are provided in the rear area.

7. The air conditioner according to any one of the preceding claims, characterized ge indicates that in the multi-zone air conditioning (1) arranged in variably formed part of the housing (10) or in the mounting or replacement part a defrost flap (16) for the Def rust operation is seen vorge¬ which allows defrosting the introduction of the warm Fondluft¬ stream in the warm front air flow.

8. The air conditioner according to claims 6 and 7, characterized in that in the multi-zone air conditioning (1) in the differently formed part of the housing (10) or in the attachment or replacement part arranged flaps (15, 16) for air distribution for ventilation and the Foot area rich in the rear area and are coupled for the Defrostbetrieb.

9. The air conditioner according to any one of the preceding claims, characterized ge indicates that in the multi-zone air conditioning (1) varies in formed part of the housing (10) or arranged in the mounting or Austausch¬ part a mixing flap (14) for air temperature control for the rear area and a defrost flap (16) for the defrosting vorge is seen, which are coupled together.

10. The air conditioner according to one of the preceding claims, characterized ge indicates that in the installed state in a motor vehicle of the air conditioner (1) the bypass spatially below the heater (8) is arranged duri fend.