DE102007013432A1 - Hot air channel for air conditioning system of motor vehicle, has separating web, where hot air leaving channel is divided into two hot air partial flows such that each flow supplies hot air to respective air outlets of system - Google Patents

Abstract

The hot air channel has a separating web (3) arranged above a hot air channel outlet opening (12) in such a manner that the hot air channel outlet opening is divided into two outlet opening regions (12.1, 12.2). The hot air is received in a region of a heat exchanger through a hot air inlet opening (4), where the hot air leaves the hot air channel through the outlet opening regions. The leaving hot air is divided into two hot air partial flows, where each hot air partial flow supplies the hot air to respective air outlets (5, 6) of an air conditioning system (1).

Description

The The invention relates to a hot air duct for an air conditioner a motor vehicle having different air outlets.

by virtue of From customer requirements, automobile manufacturers specify the function several air conditioners for motor vehicles in many cases such that a low temperature stratification, so only a small Temperature difference, between the individual air outlets of the air conditioner, must be achieved. This means that a good mixing of warm and cold air downstream of the mixing door, provided in the air conditioner for cost reasons only one single mixing door is used, inside the mixing chamber must be done. As with some air conditioners the air outlets for defrosting air, footwell and air towards Dashboard spatially far apart from each other Mix room are distributed around, is an improvement of the temperature distribution often only by introducing one or more air baffles to reach.

Therefore, today primarily a channel is used, which is either attached to a mixing door and thus connected with this rotatable or fixed to the housing of the air conditioner. So is out of the DE 101 27 339 A1 an air conditioning system with a distribution box is known in which at least two air flow paths are defined towards a mixing zone and which has two outputs. From these outputs, at least one can be charged with air from the mixing zone, wherein the air conditioning system comprises a device downstream of the mixing zone. In this channel-like passages are formed, which allow a decoupled intersection of air streams.

In the DE 197 25 127 A1 an air conditioner is disclosed which has a sealing wall with a sealing surface with which an end surface of an air mix door in contact with a maximum heating state is in contact. A defroster hot air passing passage is formed by the sealing wall, a warm air guiding part, and an inner surface of the air conditioning case. At this time, the defroster warm air guiding passage is formed in a space opposite to the sealing surface of the sealing wall at a downstream air side of the sealing wall.

The DE 101 47 112 A1 describes a control flap for an air conditioner having a plurality of pivotally mounted flap wings mounted about an axis. In this case, at least one flat side of the control flap is assigned a guide element, so that at least one flow cross-section is formed between the flat side and the guide element, through which a medium flowing around the flap can flow at least partially.

In the DE 101 47 113 A1 is an air conditioning system with a heater, optionally a cooling device and a flap device disclosed. The air conditioner also has two air outlets, each of which a cold air / hot air mixture can be fed, wherein at least one channel element is arranged in a housing having an inlet opening in the hot air area. Furthermore, the channel element has an outlet opening from which hot air can enter the outlet without appreciable mixing with cold air.

The DE 101 47 114 A1 relates to a device for controlling the temperature and ventilation of motor vehicles, which has inter alia a mixing flap, the cold air that comes directly from the evaporator, and hot air that comes directly from a heat exchanger or an electric heater, with each other can mix. Immediately downstream of the mixing flap in the direction of flow is a separate warm air duct in the form of a hot air bypass, which receives warm air above the warm air flow path which runs along the heating heat exchanger and feeds it in the distributor device to the air flow to the defrosting outlet and thus enriches this air flow with warm air.

The Basic principle according to the teachings of the above-mentioned writings from the The prior art is that warm air in one Area tapped above a heat exchanger and by means of a hot air duct in the direction of the defrost air outlets, which are located in the front part of the air conditioner, passed becomes. Usually, the inlet of the hot air duct is located below one of the air outlets to the footwell of Passenger compartment. This will set the temperature of the corresponding outlet lowered to the footwell and the defrosting air outlet, below which the hot air duct ends, increased. The temperature stratification between Footwell and defrost air outlets are through Incorporation of this type of hot air duct improved.

There the warm air that flows inside the warm air duct, not affected by the cold air outside the channel is, the hot air duct provides an efficient method of improvement the temperature stratification. With appropriate shaping of Warm air ducts are pressure loss and noise level of the air conditioner only slightly increased or even lowered.

On the other hand, if a low temperature stratification in the entire travel range of the mixing door for the air conditioner is demanded by the car manufacturer, the warm air can pass through with a warm air duct half tapes a Fußraumluftauslasses and these only leads in the direction of the defrosting, no satisfactory solution can be achieved. Neither the amount of warm air reaching the defroster air outlet nor the direction in which the air is distributed after leaving the hot air duct can be controlled. The temperature of the air towards the dashboard can not be influenced by this type of hot air duct.

often It is necessary to further improve the temperature stratification Insert air baffles, in particular the temperature of the air to influence towards the dashboard and footwell. Depending on the size and arrangement of these baffles is the pressure loss and the noise level of the air conditioner clearly increased.

The The object of the invention is to provide a new Designs for a hot air duct, by the one hand ensured It should be that amount and direction of the warm air, which is the hot air duct leaves, are specifically adjustable. Furthermore, should with not only the temperature of the air to the defrosting air and Fußraumluftauslass, but also the temperature of the air be influenced to the dashboard air outlet.

The Solution of the object of the invention is in a hot air duct for an air conditioner of a motor vehicle, the having different air outlets, wherein the hot air duct at least one warm air inlet opening, over the hot air can be received, and at least one hot air duct outlet opening, via the hot air to the air outlets of the air conditioner can be delivered. According to the invention above the at least one hot air duct outlet opening at least a divider between two outlets of the air conditioner arranged, in such a way that the hot air duct outlet opening at least in a first outlet opening area and a second exit opening area is shared. about the at least one hot air inlet opening of the hot air duct Warm air is in the range of a heat exchanger, usually above this, added. The warm air leaves the hot air duct via said individual outlet opening areas the hot air duct outlet opening. Each outlet opening area in each case an air outlet of the air conditioner is assigned. Thus, the hot air, the hot air duct over the Hot air duct outlet leaves, in at least split two warm air streams, each of a Outlet opening range go out. About the outlet opening areas can the respective associated air outlets of the air conditioner specifically supplied with hot air.

The Concept of the invention is that in an air conditioner with different air outlets (for example with each two differentiated air outlets for defrost air and for air to the dashboard) by a complex execution of the Hot air ducts, with two or more air outlet openings, the air, each in the direction of just as many air outlets of the air conditioner flows (such as in the direction Defrosting air outlet, to side window dehumidifying air outlet as well as to the outlets towards the dashboard for Personal airflow in the middle and on the side), separately each supplied with a certain amount of warm air and so that one for each of these air differs different Mixing temperature can be adjusted. Here are both the minimum number and the location of the hot air duct outlet openings with respect to the air outlets of the air conditioner, as well as the location of the channel within the housing of the Air conditioner essential features of the invention. The Temperature distribution at the air outlets of air conditioning units in motor vehicles by the invention Warm air duct in a large swivel range of the mixing door significantly improved, with pressure loss and noise behavior of the air conditioner are not adversely affected.

In a preferred embodiment of the invention engages the hot air duct via its warm air inlet opening above a heat exchanger nearby the footwell air outlets the warm air while the hot air duct outlet opening directly below the Defrosting air outlet and at least one of the air outlets, which lead to the dashboard, lies. That way different warm air partial flows each to the defrost air outlet and to at least one of the air outlets towards the dashboard directed. Preferably one supplies via the hot air duct outlet opening escaping hot air partial flow the air outlet towards the center the dashboard with warm air.

In a further embodiment, the hot air duct except the warm air duct exit opening, which extends below the Trennsteges is, another separate hot air duct outlet opening, the hot air in the form of another hot air partial flow to specifically an air outlet for side window dehumidification directs. Corresponding a further advantageous embodiment derives a further separate Hot air duct outlet hot air in the form of a corresponding Warm air partial flow to the air outlet in the direction of the side of the dashboard.

For the arrangement of the hot air duct, there are two design options. In the first embodiment, the hot air duct, seen from the manufacturing side, laterally demoulded and is inserted into the housing of the air conditioner so that the still missing edge of the channel is formed by side walls and partitions of the air conditioner. Alternatively, the hot air duct can be located freely in the mixing chamber of the air conditioner and must in this case manufacturing technology z. B. are produced as blow molding.

at Both embodiments, there is a minimum number Warm air duct outlet openings in the hot air duct, the same many air outlets of the air conditioner with additional Supply warm air. An increase in the number of warm air duct outlet openings per outlet of the air conditioner is also possible. The invention is with respect to the shape of the hot air duct or configuration of the hot air duct outlet openings, such as the number of kinks or deflections, in many different designs conceivable and should therefore not limited to a specific form or design become.

Preferably are the outlet areas that are below of the divider are formed as thin slits and directed vertically upwards, so that the warm air, the Warm air duct leaves, aligned almost parallel to the cold air flow is.

On the other hand is the hot air duct outlet opening, over the warm air is directed to the air outlet for side window dehumidification, in a side wall of the hot air duct and is opposite the hot air duct outlet opening, the below the divider is positioned, preferably oriented at right angles.

In front the hot air duct outlet opening, via the hot air in the direction of the side of the dashboard is located preferably a baffle, which is like a quarter of a cylindrical surface is shaped. With the help of this Baffle plate, hot air is beneficial from inside the hot air duct branched off and to the air outlet in the direction of the side of the dashboard fed.

The Targeted temperature distribution between the individual air outlets of the air conditioner is preferably by adjusting the size set the outlet openings of the hot air duct.

Technical, achievable with the invention advantages over the state The technique consists in that a temperature distribution of a Air conditioner for the automotive sector, for that a small temperature difference between the air outlets is required, can be achieved more easily and more targeted. Thereby, that the warm air duct directly below the divider between Defrosting air outlet and air outlet towards the dashboard ends, there is a clean distribution of the amount of hot air between two air outlets of the air conditioner. Because of the short distance between the hot air duct outlet openings and the two aforementioned air conditioning air outlets is the warm air after it has left the warm air duct, no longer through a possible cross flow the cold air coming from the evaporator. With streamlined shaping can be pressure loss and noise level of the air conditioner Reduce compared to the variant with air baffles.

With the solution according to the invention can be a Reduction of the noise level of an air conditioner for the automotive sector can be achieved.

One Another advantage arises from the fact that the temperature distribution between the individual air outlets of the air conditioner very targeted and quite easy by adjusting the size the outlet openings of the hot air duct can be adjusted.

In terms of of the static state and the functional sequence exists for the hot air duct no difference.

Further Details, features and advantages of the invention will become apparent the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

1 : the warm air duct according to the invention for improving the temperature distribution at the air outlets of the air conditioner;

1a a section through the mixing chamber, just above the mixing door of an air conditioner;

1b a plan view of the air outlet of the air conditioner for the first variant of the first embodiment of the hot air duct;

2 a first variant of the first embodiment of the hot air duct;

2a a section through the mixing chamber, just above the mixing door of the air conditioner, for the first variant of the first embodiment of the hot air duct;

2 B : the top view of the air outlet region of the air conditioner for the first variant of the first embodiment of the hot air duct;

3 a second variant of the first embodiment of the hot air duct;

3a : a section through the mixing room, just above the mixing door of the air conditioner for the second variant of the first embodiment of the hot air duct;

3b : the plan view of the air outlet of the air conditioner for the second variant of the first embodiment of the hot air duct;

4 a third variant of the first embodiment of the hot air duct;

4a a section through the mixing chamber, just above the mixing door of the air conditioner, for the third variant of the first embodiment of the hot air duct;

4b : the plan view of the air outlet of the air conditioner for the third variant of the first embodiment of the hot air duct;

5 a second embodiment of the device according to the invention;

5a a section through the mixing chamber, just above the mixing door of the air conditioner, for the second embodiment of the hot air duct and

5b : The plan view of the air outlet of the air conditioner for the second embodiment of the hot air duct.

According to the 1 to 4 becomes the hot air duct 2 with the entrance opening 4 and one or more hot air duct outlet openings preferably laterally in the air conditioner 1 integrated in such a way that the wall of the hot air duct 2 manufacturing technology can be removed from the side with a simple tool. This forms areas of the side wall of the air conditioner 1 and the divider 3 between two outlets of the air conditioner, the missing boundaries of the hot air duct 2 , Due to pressure and speed differences warm air flows at the inlet opening 4 in the warm air duct 2 enters and, guided by the wall, at one or more hot air duct outlet openings below the air outlets 5 . 6 out again. Any additional kink in the hot air duct as well as any change in cross section increases the flow resistance of the hot air duct, whereby its efficiency is reduced. The warm air is downstream of a heat exchanger, which is not shown here, for. B. in the vicinity of the air outlets to the footwell, which is also not shown, tapped, which is why the mixing temperature of the air in the air outlets reduced to the footwell and, however, increased everywhere where warm air the hot air duct 2 can leave. As the air speed near the inlet 4 in the warm air duct 2 is relatively constant, is about the size of the cross-sectional area of this hot air duct inlet opening 4 , which can be influenced by the mixing door, set the amount of hot air to be transported. According to 1 is the warm air, which is the hot air duct 2 leaves, through the divider 3 in two streams 10 . 11 divided up. A warm air partial flow 10 Passes warm air to a general defroster air outlet 5 of the air conditioner 1 and the other warm air part stream 11 to a general air outlet 6 towards the dashboard of the vehicle. About the exact positioning of the outlet 12 of the hot air duct 2 with respect to the divider 3 can the amount of hot air, which is the two air outlets 5 . 6 of the air conditioner 1 each should be set. In a first variant of the inventive solution according to 2 are the air outlets of the air conditioner 1 further differentiated. The defrosting air outlet 5 and the dashboard air outlet are each divided into two areas, which may need to have different mixed air temperatures depending on the specification of the vehicle manufacturer. In the first variant of a first embodiment of the hot air duct 2 according to 2 become a defrosting air outlet 5 and an air outlet 7 supplied to the middle of the dashboard with additional warm air. Again, the divider divides 3 according to its position relative to the hot air duct outlet opening 12 the exiting hot air flow in two warm air streams 10 . 11 through the hot air duct outlet openings 12.1 and 12.2 on, thus influencing the temperature distribution at both air outlets 5 . 7 of the air conditioner 1 can be taken. The second variant of the first embodiment of the hot air duct 2 , as in 3 shows an extension of the first variant of the first embodiment 2 dar. Next to the defrost air outlet 5 and the air outlet 7 towards the middle of the dashboard supplies the hot air duct 2 via a third hot air duct outlet opening 13 in addition an air outlet 8th for side window dehumidification with a warm air partial flow 14 , The cross-sectional area of the hot air duct outlet opening 13 in the hot air duct 2 regulates the warm air partial flow 14 through this hot air duct outlet opening 13 , A third variant of the first embodiment of the hot air duct according to the invention 2 is in 4 and shows an extension of the second variant according to 3 dar. A fourth hot air duct outlet opening 15 of the hot air duct 2 conducts warm air in the form of the warm air flow 16 to the air outlet 9 towards the side of the dashboard. The size and location of this hot air duct outlet opening 15 in the hot air duct 2 affects the amount of hot air that is at this air outlet 9 of the air conditioner 1 additionally through the warm air duct 2 provided.

In the second embodiment of the hot air duct 2 represented in 5 , warm air is downstream of the heat exchanger at the warm air inlet opening 4 tapped and over a warm air channel 2 , which is shaped like a kind of tower, across the mixing room directly to the air outlets 5 . 6 of the air conditioner 1 directed. The advantage here is the low flow resistance of the hot air duct 2 , as there are no strong kinks in the course of the hot air duct 2 occur. It is only partially worked with a cross-sectional constriction and a subsequent extension to a compromise between the flow resistance of the cold air outside the hot air duct 2 and the warm air inside the warm air duct 2 to find. It goes without saying that the hot air duct in the second embodiment according to 5 According to the invention also at least one hot air duct inlet opening 4 and a hot air duct exit opening 12 must own. Here is the number of air outlets of the air conditioner 1 , the hot air duct 2 supplied with hot air, as well as the number of hot air duct outlets, each with an air outlet of the air conditioner 1 operate, variable. According to 5b becomes the warm air duct exit opening 12 through two dividers 3 . 17 divided into four different hot air duct outlet openings. Each of these hot air duct outlet openings each serve one of a total of four air outlets, namely the defroster air outlet 5 , the air outlet 7 towards the center of the dashboard, the air outlet 8th for side window dehumidification and the air outlet 9 towards the side of the dashboard with warm air. In the context of this invention, this second embodiment of the hot air duct 2 according to 5 Also used in so-called multizone air conditioners by placing one or two halves of the hot air duct 2 , which would be demoulded from the side, of one or both sides of the partition wall or a plurality of partitions, which divides or divide the air conditioner into different temperature-controlled zones, attaches.

1

air conditioning

2

Warm air duct

3

divider

4

Warm air duct inlet opening; Inlet opening in the hot air duct 2

5

defroster

6

general Air outlet towards the dashboard

7

air outlet towards the middle of the dashboard

8th

air outlet for side window dehumidification

9

air outlet towards the side of the dashboard

10

Warm air sub

11

Warm air sub

12

Warm air duct outlet opening

12.1

Warm air duct outlet opening

12.2

Warm air duct outlet opening

13

Warm air duct outlet opening

14

Warm air sub

15

Warm air duct outlet opening

16

Warm air sub

17

divider

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10127339 A1 [0003]
• DE 19725127 A1 [0004]
• - DE 10147112 A1 [0005]
• - DE 10147113 A1 [0006]
• - DE 10147114 A1 [0007]

Claims (12)

Warm air duct for an air conditioner ( 1 ) of a motor vehicle having different air outlets ( 5 . 6 . 7 . 8th . 9 ), wherein the hot air duct ( 2 ) at least one hot air inlet opening ( 4 ), can be taken over the hot air, and at least one hot air duct outlet opening ( 12 ), via the hot air to the air outlets ( 5 . 6 . 7 . 8th . 9 ) of the air conditioner, comprises, characterized in that at least one separating web ( 3 ) above the at least one hot air duct outlet opening ( 12 ) is arranged such that the hot air duct outlet opening ( 12 ) at least in a first outlet opening area ( 12.1 ) and a second outlet opening area ( 12.2 ) and that at least one hot air inlet opening ( 4 ) of the hot air duct ( 2 ) Warm air is received in the area of a heat exchanger and via the individual outlet opening areas ( 12.1 . 12.2 ) the warm air duct ( 2 ), whereby the hot air, the hot air duct ( 2 ) via the hot air duct outlet opening ( 12 ), in at least two hot air partial flows ( 10 . 11 ), the associated air outlets ( 5 . 6 . 7 ) of the air conditioner ( 1 ) supply with warm air. Warm air duct according to claim 1, characterized in that the hot air duct ( 2 ) different hot air partial flows ( 10 . 11 ) each to at least one Entfrostungsluftauslass ( 5 ) and to at least one of the air outlets ( 6 . 7 . 9 ) in the direction of the dashboard. Warm air duct according to claim 1 or 2, characterized in that the outlet opening areas ( 12.1 . 12.2 ) located below the separating web ( 3 ) are formed as thin slits and are directed vertically upwards, so that the hot air leaving the hot air duct, is aligned almost parallel to the cold air flow. Warm air duct according to one of claims 1 to 3, characterized in that a via the hot air duct outlet opening ( 12 ) exiting warm air partial flow ( 11 ) the air outlet ( 7 ) supplied with warm air in the direction of the center of the dashboard. Warm air duct according to one of claims 1 to 4, characterized in that via a hot air duct outlet opening ( 13 ) Hot air in the form of a warm air partial flow ( 14 ) to an air outlet ( 8th ) is led to the side window dehumidification. Warm air duct according to claim 5, characterized in that the hot air duct outlet opening ( 13 ), via the hot air to the air outlet ( 8th ) is led to the side window dehumidification, opposite the hot air duct outlet opening ( 12 ) located below the separating web ( 13 ) is aligned at right angles. Warm air duct according to one of claims 1 to 6, characterized in that via a hot air duct outlet opening ( 15 ) Warm air in the form of the hot air partial flow ( 16 ) to the air outlet ( 9 ) is directed towards the side of the dashboard. Warm air duct according to claim 7, characterized in that in front of the hot air duct outlet opening ( 15 ) is a baffle formed as a quarter of a cylindrical surface to warm air from the interior of the hot air duct ( 2 ) and divert it to the air outlet ( 9 ) in the direction of the side of the dashboard. Warm air duct according to one of claims 1 to 8, characterized in that the hot air duct ( 2 ) so in the housing of the air conditioner ( 1 ) is inserted, that the still missing boundary of the channel by sidewalls and partitions ( 3 ) of the air conditioner ( 1 ) is formed. Warm air duct according to one of claims 1 to 8, characterized in that the hot air duct ( 2 ) freely in the mixing chamber of the air conditioner ( 1 ) lies. Warm air duct according to claim 10, characterized in that the hot air duct ( 2 ) is formed as a blow molding. Warm air duct according to one of claims 1 to 11, characterized in that the temperature distribution between the individual air outlets ( 5 . 8th . 7 . 9 ) of the air conditioner ( 1 ) targeted by adjusting the size of the outlet openings of the hot air duct ( 2 ) is set.