WO2021140195A1

WO2021140195A1 - Heating, ventilation and/or air conditioning system

Info

Publication number: WO2021140195A1
Application number: PCT/EP2021/050263
Authority: WO
Inventors: Wolfgang Hopf; Robert Kindl
Original assignee: Valeo Klimasysteme Gmbh
Priority date: 2020-01-08
Filing date: 2021-01-08
Publication date: 2021-07-15
Also published as: DE102020100247A1

Abstract

The invention relates to a heating, ventilation and/or air conditioning system (10), comprising a housing (11) having a fan housing (12) for accommodating a fan and an evaporator, and a connected distributor housing (14) for accommodating a heating device and fan flaps. The fan housing (12) comprises at least two housing shells (34, 36) that are secured to one another, wherein a first housing shell (34) of the fan housing (12) is mechanically fixed to the distributor housing (14), and wherein a second housing shell (36) of the fan housing (12) is captively connected to the distributor housing (14) only via the first housing shell (34). A shift protection means (50) is provided between the second housing shell (36) and the distributor housing (14), which allows a movement of only the second housing shell (36) towards the distributor housing (14) in a mounting direction and prevents a movement in a transverse blocking direction via stop surfaces (52, 54, 60, 62).

Description

Heating, ventilation and / or air conditioning

The invention relates to a heating, ventilation and / or air conditioning system for a motor vehicle.

Heating, ventilation and / or air conditioning systems in motor vehicles are used to ventilate and air-condition a vehicle interior.

Such heating, ventilation and / or air conditioning systems have a housing in which various components of the heating, ventilation and / or air conditioning system are housed, for example an evaporator, a heating device, various flaps, etc.

For manufacturing and assembly reasons, the housing of such systems is usually made in several parts, in particular composed of several housing shells. In order to connect the housing shells with one another sufficiently firmly, they are usually screwed together. For this purpose, screw lugs are provided which are molded onto the housing shells. Such screw straps, however, usually protrude from the housing shells and require a certain amount of space both during assembly and when installed.

However, the installation space conditions in modern vehicles are very cramped, so that there is often not enough space for such screw straps.

It is therefore an object of the invention to provide a heating, ventilating and / or air conditioning system which has a particularly small footprint.

This object is achieved according to the invention by a heating, ventilation and / or air conditioning system with a housing which comprises a fan housing for accommodating a fan and an evaporator and a distributor housing connected to it for accommodating a heating device and fan flaps. The fan housing comprises at least two housing shells fastened to one another. A first housing shell of the fan housing is with the Distributor housing mechanically firmly connected. A second housing shell of the fan housing is connected captively to the distributor housing only via the first housing shell. A shift lock is provided between the second housing shell and the distributor housing, which allows movement of only the second housing shell towards the distributor housing in one mounting direction and prevents movement in a blocking direction transversely thereto through stop surfaces.

Since the second housing shell is connected to the distributor housing in a captive manner only via the first housing shell, the number of screw connections in the housing of the heating, ventilation and / or air conditioning system is reduced overall compared to known housings for such systems. In particular, no screw straps or similar protruding fastening means are provided at an interface between the second housing shell and the distributor housing. In this way, especially the width of the heating, ventilation and / or air conditioning system can be kept small. Since the shift lock allows the second housing shell to move towards the distributor housing in one assembly direction and prevents it in a blocking direction, simple assembly of the second housing shell is possible while at the same time preventing undesired movement of the second housing shell during operation of the heating, ventilation and / or air conditioning system is. More precisely, the individual housing components are prevented from shifting relative to one another in such a way that leaks occur at the interfaces. The shift lock prevents the housing from leaking as a result of minor deformations of the housing shells, as can occur during ferry operations.

“Loss-proof” means that the second housing shell is fixed in every direction relative to the distributor housing. The fact that the second housing shell of the fan housing is captively connected to the distributor housing only via the first housing shell also means that there is no direct coupling of the second housing shell to the distributor housing that secures the second housing shell in all directions on the distributor housing.

However, between the first housing shell and the second housing shell and between the first housing shell and the distributor housing at least one latching connection and / or a screw connection may be present. In this way, the individual housing components, viewed overall, are fastened to one another sufficiently firmly and stably.

According to one embodiment, at least one first stop surface on the second housing shell and at least one corresponding second stop surface on the distributor housing are provided, which rest against one another in such a way that movement of the second housing shell in the blocking direction is prevented. Stop surfaces have the advantage that they reliably prevent movement in a certain direction, in particular transversely or perpendicular to the stop surface. This effect occurs immediately as soon as the stop surfaces are in contact with one another in the intended manner, without manual mechanical fixation having to be carried out. At the same time, stop surfaces have the advantage that they allow a movement parallel to the stop surfaces without it being necessary to release a mechanical connection.

For example, the stop surfaces are formed on projections and / or recesses in the second housing shell and the distributor housing. Such shapes can be easily formed, in particular in injection molded parts.

Further stop surfaces can be provided on a nose formed on the second housing shell or on the distributor housing and on a corresponding slot in the respective other part of the second housing shell and the distributor housing Nose engages in the slot. In this way, the shift lock is particularly reliable.

The nose and the slot preferably run transversely to the blocking direction, in particular perpendicular to the blocking direction. As a result, a movement is blocked both in the blocking direction and in the opposite direction to the blocking direction, so that the protection against displacement is particularly effective.

According to one embodiment, mutually opposing sealing surfaces are provided on the fan housing and on the distributor housing, and the blocking direction runs transversely to the sealing surfaces, in particular perpendicular to the sealing surfaces. By making the blocking direction transverse to runs along the sealing surfaces, the shift lock has the particular advantage that the sealing surfaces cannot move away from each other. In this way, a particularly reliable seal is achieved. In the assembled state, the fan housing and the distributor housing are sealed to one another in a fluid-tight manner, in particular along the sealing surface.

In the fan housing, for example, a fan unit and / or an evaporator is arranged and / or an air duct is formed.

A heating device and / or at least one flap and / or at least one mixing chamber can be arranged in the distributor housing.

The two aforementioned features have the advantage that all the necessary components of the heating, ventilation and / or air conditioning system can be accommodated in the housing in a compact manner.

According to one embodiment, the distributor housing has a third and a fourth housing shell which together delimit a cavity for receiving the heating device, a mixing chamber and at least one flap. The two-part production improves manufacturability and components such as the heating device and the at least one flap can easily be positioned in the cavity before the third and fourth housing shells are assembled to form the distributor housing.

The fan housing preferably consists of the first housing shell and the second housing shell.

According to one embodiment, the second housing shell defines a transition area with an overflow opening to the distributor housing, at least in sections, and the fan housing has an overflow region at which it is coupled to the distributor housing in terms of flow. The first and the second housing shell preferably together delimit the overflow opening, the displacement lock being provided in the overflow area. The shift lock is thus arranged in the area in which leaks can potentially arise due to a movement of the fan housing relative to the distributor housing and reliably prevents the formation of gaps in this area. Further advantages and features of the invention emerge from the following description and from the accompanying drawings, to which reference is made. In the drawings show:

Figure 1 shows a heating, ventilation and / or air conditioning system according to the invention,

FIG. 2 shows a fan housing of the heating, ventilation and / or air conditioning system from FIG. 1,

FIG. 3 shows a distributor housing for the heating, ventilation and / or air conditioning system from FIG. 1,

FIG. 4 shows a partial area of the heating, ventilation and / or air conditioning system from FIG. 1 with a shift lock,

FIG. 5 shows a detailed view of the anti-slide device from FIG. 4,

FIG. 6 shows a further detailed view of the anti-slip device,

FIG. 7 shows a detailed view of a safety device against displacement according to a further embodiment according to the invention of the heating, ventilation and / or air conditioning system during assembly of the heating, ventilation and / or air conditioning system,

FIG. 8 shows the anti-shift device from FIG. 7 in the assembled state of the heating, ventilation and / or air conditioning system,

FIG. 9 shows a detailed view of the anti-shift device on the distributor housing, and FIG

FIG. 10 shows a detailed view of a safety device against displacement according to a further embodiment of the heating, ventilation and / or air conditioning system according to the invention.

FIG. 1 shows a heating, ventilation and / or air conditioning system 10 according to the invention.

The heating, ventilation and / or air conditioning system 10 comprises a housing 11, which is composed of a fan housing 12 and a distributor housing 14. In Figures 2 and 3, the fan housing 12 and the distributor housing 14 are shown individually for better understanding.

The fan housing 12 is provided to accommodate an evaporator and a fan, which are not shown in the figures for the sake of simplicity. In Figure 2, however, a receiving area 16 and a fan area 18 are shown, which are designed to accommodate the evaporator or the fan.

In addition, an air duct 20 is formed in the fan housing 12.

The distributor housing 14 is designed to accommodate a heating device and several ventilation flaps, which are also not shown in the figures.

In Figure 3, however, a receiving area 22 for the heating device and several bearings 24 for the fan flaps are shown.

Furthermore, a mixing chamber 26 is arranged in the distributor housing 14.

In addition, there are several outlet openings 28 in the distributor housing 14, each of which leads to different areas of a vehicle interior in order to ventilate and air-condition it. The outlet openings 28 lead, for example, to a driver's seat, a passenger seat, a footwell and a windshield.

Ambient air can be sucked in by means of the fan, which air can be fed through an overflow area 30 of the fan housing 12 to the distributor housing 14 and from there in turn can be conveyed to the various areas of the vehicle interior.

The fan housing 12 and the distributor housing 14 are each formed from a plurality of housing shells 34, 36, 38, 40. More precisely, the fan housing 12 consists of a first housing shell 34 and a second housing shell 36 and the distributor housing 14 consists of a third housing shell 38 and a fourth housing shell 40. The third and the housing shell 38, 40 together delimit a cavity 41 for receiving the heating device and the fan flaps. The housing shells 34, 36, 38, 40 are preferably plastic injection molded parts.

In the assembled state of the heating, ventilation and / or air conditioning system 10, the first housing shell 34 and the second housing shell 36 of the fan housing 12 are firmly connected to one another, in particular screwed. The third housing shell 38 and the fourth housing shell 40 of the distributor housing 14 are also firmly connected to one another, in particular screwed to one another.

The first housing shell 34 of the fan housing 12 is in turn mechanically firmly connected to the distributor housing 14, in particular by means of screw connections and / or snap-in connections.

In addition to the screw and / or latching connections, positioning means, for example positioning pins, can also be present, which facilitate the assembly of the housing 11.

The second housing shell 36 of the fan housing 12, on the other hand, is connected captively to the distributor housing 14 only via the first housing shell 34. This means that the second housing shell 36 is neither screwed nor latched to the distributor housing 14. There is thus a certain mobility between the second housing shell 36 and the distributor housing 14.

The first housing shell 34 and the second housing shell 36 each define in sections a transition area 42 with an overflow opening 44 to the distributor housing 14.

In order to supply an air volume flow sucked in by the fan to the distributor housing 14 reliably and as completely as possible, mutually opposing sealing surfaces 46, 48 are provided on the fan housing 12 and on the distributor housing 14. For example, the sealing surfaces 46, 48 are provided on collars and / or grooves which are formed on the fan housing 12 and / or the distributor housing 14. In order to keep the sealing surfaces 46, 48 in contact with one another in a particularly reliable manner, a displacement lock 50 is provided between the second housing shell 36 and the distributor housing 14.

The shift lock 50 allows a movement of only the second housing shell 36 to the distributor housing 14 in an assembly direction and prevents a movement in a blocking direction transversely thereto through stop surfaces 52, 54 (see FIGS. 4 to 6). At least one stop surface 52 is arranged on the second housing shell 36 and at least one stop surface is arranged on the distributor housing 14. The shift lock 50 is consequently only effective when the fan housing 12 and the distributor housing 14 are mounted on one another as intended.

The blocking direction runs transversely to the sealing surfaces 46, 48, in particular perpendicular to the sealing surfaces 46, 48. The stop surfaces 52, 54, on the other hand, preferably run parallel or approximately parallel to the sealing surfaces 46, 48. The blocking direction is illustrated by an arrow in FIG.

FIG. 4 shows an area of the heating, ventilating and / or air conditioning system 10 in which the sliding lock 50 is arranged.

FIGS. 5 and 6 each show a detailed view of the slide lock 50 on two opposite sides of the housing 11.

The stop surfaces 52, 54 of the slide lock 50 are each formed on projections 56, 58 in the second housing shell 36 and in the distributor housing 14. A first projection 56 is formed, for example, in the form of a nose and the second projection 58 has, for example, the form of a step in a housing wall of the distributor housing 14.

As can be seen in FIGS. 5 and 6, when the heating, ventilating and / or air conditioning system 10 is installed, the stop surfaces 52, 54 rest against one another in such a way that movement of the second housing shell 36 in the blocking direction is blocked.

FIGS. 7 and 8 show a shift lock 50 according to a further embodiment of the heating, ventilation and / or air conditioning system 10. The shift lock 50 according to Figures 7 and 8 differs from the embodiment illustrated in Figures 4 to 6 in that, in addition to the stop surfaces 52, 54, further stop surfaces 60, 62 on a nose 64 formed on the distributor housing 14 and a corresponding slot 66 are provided in the second housing shell 36. Alternatively, the nose 64 can also be arranged on the second housing shell 36 and the slot 66 in the distributor housing 14.

FIG. 7 shows the shift lock 50 during assembly of the heating, ventilation and / or air conditioning system 10. In this illustration, it becomes clear that the shift lock 50 moves the second housing shell 36 in an assembly direction that is illustrated in FIG. 7 by an arrow , allowed.

The state illustrated in FIG. 7 occurs during assembly while the fan housing 12 and the distributor housing 14 are not yet mechanically firmly connected to one another.

In the assembled state of the heating, ventilation and / or air conditioning system 10, which is shown in FIG. 8, the nose 64 engages in the slot 66 so that the additional stop surfaces 60, 62 as well as the stop surfaces 52, 54 rest against one another and thereby prevent movement of the second housing shell 36 in the blocking direction and in a direction opposite to the blocking direction.

It is particularly clear from FIG. 8 that the shift lock 50 reliably prevents the sealing surface 48 of the distributor housing 14 from lifting off the sealing surface 46 of the second housing shell 36 and creating an air gap. The second housing shell 36 cannot move either up or down relative to the distributor housing 14, “up” and “down” referring to the view shown in FIG.

FIG. 9 shows a detailed view of the slide lock 50 on the distributor housing 14. In this view it becomes clear that the stop surface 54 on the distributor housing 14 is formed in that the distributor housing 14 has different wall thicknesses in the area of the slide lock 50, whereby a step arises. This also applies to the embodiment according to FIGS. 4 to 6.

FIG. 10 shows a shift lock 50 according to a further embodiment of the heating, ventilation and / or air conditioning system 10. The embodiment according to FIG. 9 differs from the embodiment illustrated in FIGS. 4 to 6 in that several projections 56 are provided on the fan housing 12 , which are arranged in the assembled state of the heating, ventilation and / or air conditioning system 10 in corresponding recesses 68 on the distributor housing 14.

Claims

1. Heating, ventilation and / or air conditioning system (10) with a housing (11) which comprises a fan housing (12) for accommodating a fan and an evaporator and a distributor housing (14) connected to it for accommodating a heating device and fan flaps, wherein the fan housing (12) has at least two housing shells (34, 36) fastened to one another, a first housing shell (34) of the fan housing (12) being mechanically firmly connected to the distributor housing (14), and a second housing shell (36) of the Fan housing (12) is captively connected to the distributor housing (14) only via the first housing shell (34), and a shift lock (50) is provided between the second housing shell (36) and the distributor housing (14), which only allows the second Allow housing shell (36) to the distributor housing (14) in an assembly direction and prevent movement in a blocking direction transversely thereto by stop surfaces (52, 54, 60, 62).

2. Heating, ventilation and / or air conditioning system (10) according to claim 1, characterized in that at least one first stop surface (52) on the second housing shell (36) and at least one corresponding second stop surface (54) on the distributor housing (14 ) are provided which bear against one another in such a way that a movement of the second housing shell (36) in the blocking direction is blocked.

3. Heating, ventilation and / or air conditioning system (10) to one of the preceding claims, characterized in that the stop surfaces (52, 54) on projections (56, 58) and / or recesses (68) in the second housing shell (36 ) and the distributor housing (14) are formed.

4. Heating, ventilation and / or air conditioning system (10) according to claims 2 and 3, characterized in that further stop surfaces (60, 62) on a nose formed on the second housing shell (36) or on the distributor housing (14) (64) and at a corresponding slot (66) in the respective other part of the second housing shell (36) and the distributor housing (14) are, wherein in the assembled state of the heating, ventilation and / or air conditioning system (10), the nose (64) engages in the slot (66).

5. heating, ventilation and / or air conditioning system (10) according to claim 4, characterized in that the nose (64) and the slot (66) extend transversely to the blocking direction.

6. heating, ventilation and / or air conditioning system (10) according to any one of the preceding claims, characterized in that on the fan housing (12) and on the distributor housing (14) cooperating, opposite sealing surfaces (46, 48) are provided and the blocking direction transversely to the sealing surfaces (46, 48), in particular perpendicular to the sealing surfaces (46, 48).

7. heating, ventilation and / or air conditioning system (10) according to any one of the preceding claims, characterized in that a fan unit and / or an evaporator is arranged in the fan housing (12) and / or that a fan housing (12) is arranged Air duct (20) is formed.

8. Heating, ventilation and / or air conditioning system (10) according to one of the preceding claims, characterized in that a heating device and / or at least one flap and / or at least one mixing chamber (26) is arranged in the distributor housing (14).

9. Heating, ventilation and / or air conditioning system (10) according to one of the preceding claims, characterized in that the distributor housing (14) has a third and a fourth housing shell (38, 40) which together have a cavity (41) for Limit the reception of the heating device, a mixing chamber (26) and at least one flap.

10. Heating, ventilation and / or air conditioning system (10) according to one of the preceding claims, characterized in that the second housing shell (36) defines and at least in sections a transition area (42) with an overflow opening (44) to the distributor housing (14) that the fan housing (12) has an overflow area (30) at which it is fluidly coupled to the distributor housing (14) and the first and second housing shells (34, 36) together delimit an overflow opening (44), the displacement lock (50 ) is provided in the overflow area (30).