DE102014209452A1 - Air conditioning with bypass device - Google Patents

Abstract

The invention relates to an air conditioning system (1) for a vehicle, comprising a fan (2) for sucking in air (12), an evaporator (3) for cooling at least part of the sucked air (12), and downstream of the evaporator Mixing chamber (4), and a bypass device for passing a portion of the sucked air (12) on the evaporator (3) in the mixing chamber (4). The bypass device has a first bypass channel (5) with a first air flap (6) and a second bypass channel (7) with a second air flap (8) and is configured to be connected by means of the first air flap (6) and the second air flap (8). to control separately a first air flow through the first bypass channel and a second air flow through the second bypass channel. Furthermore, an associated method for operating an air conditioner (1) is provided.

Description

Technical area

The invention relates to an air conditioning system for a vehicle according to the preamble of claim 1. Furthermore, the invention relates to an associated method for operating an air conditioning system according to claim 10.

State of the art

The use of air conditioning systems in motor vehicles is known. In particular, conventional air conditioning systems have an evaporator which extracts heat from the air and thus effects cooling. Depending on the power, the air conditioning can cause a not insignificant proportion of the fuel consumption or energy consumption of the vehicle. In order to operate an air-conditioning system energy-efficiently, a portion of the intake air is to be conducted past the evaporator, depending on the current setting of the air-conditioning system.

In order to pass a part of the sucked air past the evaporator, a bypass air path is provided around the evaporator. Known solutions are for example in the publications DE 10 2005 048 910 A1 and EP 2 450 204 A2 specified.

It is from the DE 10 2005 048 910 A1 known to pass a provided with a damper bypass duct on the air filter and evaporator.

From the EP 2 450 204 A2 Furthermore, a bypass duct with at least one transverse duct adjoining the bypass duct is known, wherein the transverse duct expands along the longitudinal extent of the evaporator. The bypass channel and / or the transverse channel can have an air flap. A disadvantage of the known solutions is that a single bypass channel at the top or bottom has an uneven air volume distribution result. Possible remedies for this usually have an acoustically negative influence. A channel (or cross channels), which are led to behind the evaporator, in turn result in obstruction of the airway and thus have a negative impact on the flow pattern.

Presentation of the invention, object, solution, advantages

It is the object of the invention to provide an air conditioner in which the above-mentioned disadvantages are avoided. In particular, an energy-efficient air conditioning is to be created, which has a uniform air distribution with optimal flow pattern in a mixing room. Also, a related process should be created.

The object of the air conditioner is achieved with the features of claim 1. An embodiment of the invention relates to an air conditioning system for a vehicle having a fan for sucking in air, an evaporator for cooling at least a part of the sucked air, a mixing chamber downstream of the evaporator, and a bypass device for bypassing part of the sucked air past the evaporator into the mixing room. The bypass device has a first bypass channel with a first air flap and a second bypass channel with a second air flap and is configured to separately use the first air flap and the second air flap a first air flow through the first bypass channel and a second air flow through the second bypass channel regulate.

The object of the air conditioner is also achieved with the features of claim 2.

An embodiment of the invention relates to an air conditioning system for a vehicle, comprising a blower for sucking in air, an evaporator for cooling at least a part of the sucked air, a mixing chamber downstream of the evaporator, and a bypass device for bypassing part of the sucked air the evaporator into the mixing chamber, characterized in that the bypass device has a first bypass channel and a second bypass channel with a common air damper and is adapted to control by means of the air damper a first air flow through the first bypass channel and a second air flow through the second bypass channel

Furthermore, a method with the steps of claim 11 is provided. Accordingly, an air conditioner is operated, which includes a blower for sucking air, an evaporator, a mixing chamber arranged behind the evaporator, and a bypass device having a first bypass channel and a second bypass channel, which are led to different sides of the mixing chamber and with which a part of air is passed over the evaporator, has. According to the method, a first air flow through the first bypass passage by means of a first air damper of the first bypass passage and a second air flow through the second bypass passage by means of a second damper of the second bypass passage are controlled such that regardless of a different pressure drop in the first bypass passage and in the second bypass passage of both in each case an equal air mass flow is introduced into the mixing chamber.

It is thus, clearly stated, created an air conditioner with an improved bypass device, in which advantageously to be passed past the evaporator air between the blower and evaporator via two independent flaps is tapped. The branched air is then passed to the evaporator via two separate bypass channels.

An advantage of the invention is the fact that, compared to the bypass solutions of the prior art, a larger channel cross-section can be achieved. Furthermore, a better or more uniform distribution of air volume can be achieved, and the air is better mixed behind the evaporator. This is achieved in particular by the fact that the air flows due to the fact that two separate bypass channels are used, which are controlled separately, can be better influenced or guided more accurately. Because the mass flow components can be controlled individually by the evaporator and by the bypass ducts due to the separately adjustable air dampers, a mass flow compensation can be carried out on the right or left at different channel pressure drops in a comfortable manner.

According to a preferred embodiment of the invention, the bypass device is provided with such outflow openings and the first bypass channel and the second bypass channel are designed such that the first air flow through the first bypass channel on a first, in particular left or right, and the second air flow over the second Bypass channel at a second, the first side opposite, are guided through outflow openings in the mixing chamber.

According to a preferred embodiment, the outflow openings, more specifically the outflow openings behind the evaporator on the sides of the mixing chamber, in particular on both sides, that is, left and right substantially over the entire height of the evaporator or the entire height of the mixing chamber.

Thus, the air flow distribution left and right and also up and down can be further improved.

According to a particular embodiment, the air conditioning system has at least one chimney or chimney-like from top to bottom and adjacent to the mixing space outflow part, wherein the outflow openings are provided on the second side through the chimney-like outflow part. It is preferred that, for example, the second bypass channel is guided above or below the evaporator and opens into the chimney-like outflow part.

Thus, the structural design of the air conditioning system can be adjusted in a particularly simple manner, particularly in terms of their dimensions and space requirements in the vehicle while optimally optimal airway guidance at the same time.

According to another preferred embodiment of the invention, the first bypass channel supplies the fan near side with outflow openings. In other words, the above-mentioned first side with outflow openings, which is associated with the first bypass channel, is arranged close to the fan. Furthermore, the first bypass channel is arranged in a construction space which lies between the blower, in particular the blower and / or an associated air filter arranged behind the blower, and the evaporator.

By this arrangement, the first bypass channel, the free space between the fan coil and / or filter box on the one hand and distribution housing on the other hand, which is usually present in asymmetric air conditioning systems, are well utilized.

According to another very advantageous development of the invention, the bypass device is designed such that the sizes of the outflow openings vary and in particular continuously become smaller or larger along a certain direction.

In view of the fact that, according to the invention, the size of the outflow openings determines the mass flow distribution of the respective bypass air flow in height, an air quantity distribution and air mixture adapted further to the type and shape of the air conditioning system can be achieved in this way.

According to a particular embodiment, the first air flap and the second air flap are in particular mechanically coupled to one another. This is a preferred solution especially for variants with a correspondingly good geometric design of the bypass channels. The coupling of the louvers can be coupled to each other in a linear manner, but also in a non-linear manner, in the case of the louvers in accordance with a transmission or reduction ratio.

According to yet another advantageous development of the invention, the first air flap and / or the second air flap are each equipped with additional air guide elements attached to the respective air flap. This can achieve a further improvement in the control of the mass flow components For example, to direct more air into the bypass channel with higher pressure resistance.

The object of the method is also achieved with the features of claim 12.

One embodiment of the invention relates to a method for operating an air conditioning system, wherein the air conditioning system comprises a blower for sucking in air, an evaporator, a mixing space arranged behind the evaporator, and a bypass device with a first bypass duct and a second bypass duct, which lead to different sides of the mixing space are guided and with which a part of air is passed to the evaporator, having a first air flow through the first bypass channel by means of an air damper of the first bypass channel and a second air flow through the second bypass duct by means of the air damper are controlled such that even in presence a respective different pressure drop in the first bypass channel and in the second bypass channel through both bypass channels in each case an equal air mass flow is introduced into the mixing chamber.

Further advantageous embodiments are described by the following description of the figures and by the subclaims.

Brief description of the drawings

The invention will be explained in more detail on the basis of at least one embodiment with reference to the drawings. Show it:

1 a schematic representation of an air conditioner with bypass device according to a particular embodiment of the invention, and.

2 to 7 various perspective views of a section of an air conditioner according to the invention, according to an embodiment of the invention.

Preferred embodiment of the invention

The 1 shows an embodiment of an air conditioner according to the invention 1 with bypass device. As in the schematic representation in 1 shown, the air conditioner 1 a fan 2 for sucking in air 12 on. The sucked air or the air flow is in the drawing, in particular by the arrow, with the reference numeral 12 is symbolized. The air is in an air duct 16 the air conditioning 1 sucked. In the air duct 16 is an air filter 13 to clean the air.

The air duct 16 flows into an evaporator 3 by which the air is cooled. To the evaporator 3 connected is a mixing room 4 and a distributor 14 with a number of outlets 17 through which the can be discharged into the passenger compartment of the vehicle again.

According to the invention, the air conditioner 1 equipped with a bypass device. The bypass device has in particular a plurality of bypass channels 5 . 7 and several at the mixing room 4 arranged outflow openings 10 . 11 on, passing through the bypass channels 5 . 7 be supplied. The bypass channels 5 . 7 are separated and with air dampers 6 . 8th equipped, which are separately controllable. By the bypass channels in each case at least a part of the sucked air 12 on the evaporator 3 pass directly into the mixing room 4 introduced.

The invention now allows a particularly large channel cross-section and a better air flow distribution right / left and up / down and a better air mixture behind the evaporator, that is in the mixing chamber.

After in the 1 the particular embodiment shown are the bypass channels 5 . 7 designed so that they are on different sides of the mixing chamber 4 be guided. The first bypass channel 5 uses the between blower 2 or air filter 13 and the evaporator 3 existing, otherwise free space 15 and thus branches off the air duct 16 to the fan side of the mixing room 4 off to the local outflow openings 11 to supply.

The second bypass channel 7 is passed above or below the evaporator and flows into a fireplace or in a chimney-like outflow part 9 , from which the fan-remote side of the mixing chamber with outflow openings 10 is supplied.

It is preferred that as far as possible on both sides of the outflow openings 10 . 11 over the entire height of the evaporator 3 or mixing room 4 are arranged. In this way it is particularly reliable always optimal air volume distribution and mixing of the bypass air and evaporator air can be achieved.

True, in 1 shown that the second bypass channel 7 , which is performed above or below the evaporator, compared to the first bypass channel 5 on the opposite side from the air duct 16 branches. However, the invention is not limited to such an embodiment. Thus, there are other advantageous embodiments in which the bypass channels 5 . 7 on the same side of the air duct 16 , in particular arranged one above the other, branch off and / or both bypass channels 5 . 7 the free space 15 exploit. The concrete design The bypass guide is dependent inter alia on the particular model of the air conditioner and is therefore adjusted accordingly.

The air conditioner can run in the embodiment shown here in an operating mode, in which thanks to the arrangement of the bypass channels 5 . 7 and their separate control a substantial mass flow compensation of the air quantities is achieved by the bypass channels 5 . 7 in the mixing room 4 flow. With a sufficiently good geometric design of the bypass channels 5 . 7 is also a mutual coupling of the louvers 6 . 8th possible. On the louvers additional guide elements (not shown at this point) may be attached to control the mass flow components. In the 2 to 7 are various perspective views of a section of an air conditioner according to the invention 1 shown according to another embodiment. The reference numerals in the 2 to 7 correspond to those in 1 because they are the same or similar parts. It should also be noted that for the sake of clarity, the illustration of the air conditioning 1 in the 2 to 7 each without the evaporator.

As in the 2 to 7 is shown, it is an asymmetrically shaped air conditioning 1 , The fan is arranged laterally of the evaporator not explicitly shown here, through the air duct 16 is supplied with sucked air.

In the 4 to 7 are particularly good the independently adjustable air dampers 6 . 8th to recognize. As the drawing also shows, the removal of the bypass air takes place here, in contrast to 1 , on the same side of the air duct 16 , By means of the air flaps 6 . 8th sucked in air can be fed via two separate bypass channels behind the evaporator.

In addition to the above written disclosure is hereby further disclosure of the invention supplementary to the representation in the 1 to 7 Referenced.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005048910 A1 [0003, 0004]
• EP 2450204 A2 [0003, 0005]

Claims (12)

Air conditioning ( 1 ) for a vehicle, with a blower ( 2 ) for the intake of air ( 12 ), an evaporator ( 3 ) for cooling at least part of the intake air ( 12 ), a mixing chamber downstream of the evaporator ( 4 ), and a bypass device for passing a part of the intake air ( 12 ) on the evaporator ( 3 ) in the mixing room ( 4 ), characterized in that the bypass device comprises a first bypass channel ( 5 ) with a first air damper ( 6 ) and a second bypass channel ( 7 ) with a second air damper ( 8th ) and is adapted, by means of the first air damper ( 6 ) and the second air damper ( 8th ) to separately control a first air flow through the first bypass passage and a second air flow through the second bypass passage, respectively. Air conditioning ( 1 ) for a vehicle, with a blower ( 2 ) for the intake of air ( 12 ), an evaporator ( 3 ) for cooling at least part of the intake air ( 12 ), a mixing chamber downstream of the evaporator ( 4 ), and a bypass device for passing a part of the intake air ( 12 ) on the evaporator ( 3 ) in the mixing room ( 4 ), characterized in that the bypass device comprises a first bypass channel ( 5 ) and a second bypass channel ( 7 ) having a common air flap and is adapted to control by means of the air damper a first air flow through the first bypass channel and a second air flow through the second bypass channel Air conditioning ( 1 ) according to claim 1 or 2, characterized in that the bypass device with such outflow openings ( 10 . 11 ) and the first bypass channel ( 5 ) and the second bypass channel ( 7 ) are designed such that the first air flow over the first bypass channel ( 5 ) on a first, in particular left or right, side relative to the evaporator ( 3 ) and the second air flow via the second bypass channel ( 7 ) on a second, the first side opposite side through the outflow openings ( 10 . 11 ) in the mixing room ( 4 ). Air conditioning ( 1 ) according to claim 3, characterized in that behind the evaporator ( 3 ) the outflow openings ( 10 . 11 ) especially on both sides substantially over the entire height of the evaporator ( 3 ) or the entire height of the mixing space ( 4 ) are arranged. Air conditioning ( 1 ) according to claim 4, characterized in that the air conditioning ( 1 ) at least one of the mixing space ( 4 ) adjacent and from top to bottom running fireplace-like outflow part ( 9 ), which on the second side relative to the evaporator ( 3 ) placed outflow openings ( 10 ). Air conditioning ( 1 ) according to claim 4 or 5, characterized in that the first, the first bypass channel ( 5 ) associated side is fan near and the first bypass channel in a space ( 15 ) arranged between the fan ( 2 ), in particular the fan and / or one behind the blower ( 2 ) associated air filter ( 13 ), and the evaporator ( 3 ) lies. Air conditioning ( 1 ) according to claim 5 or 6, characterized in that the second bypass channel ( 7 ) at the top or bottom of the evaporator ( 3 ) is guided past and in the chimney-like outflow part ( 9 ) opens. Air conditioning ( 1 ) according to one of claims 3 to 6, characterized in that the sizes of the outflow openings ( 10 . 11 ) and in particular continuously become smaller or larger along a specific spatial direction along the bypass device. Air conditioning ( 1 ) according to one of the preceding claims, characterized in that the first air flap ( 6 ) and the second air damper ( 8th ) are mechanically coupled to each other in particular. Air conditioning ( 1 ) according to one of the preceding claims, characterized in that the first air flap ( 6 ) and / or the second air damper ( 8th ) each with additional, at the respective air damper ( 6 . 8th ) mounted air guide elements are equipped. Method for operating an air conditioning system ( 1 ), the air conditioning ( 1 ) a blower ( 2 ) to the Aspiration of air ( 12 ), an evaporator ( 3 ), one behind the evaporator ( 3 ) arranged mixing space ( 4 ), and a bypass device with a first bypass channel ( 5 ) and a second bypass channel ( 7 ), which lead to different sides of the mixing chamber ( 4 ) and with which part of the air ( 12 ) on the evaporator ( 3 ) is passed, characterized in that a first air flow through the first bypass channel ( 5 ) by means of a first air flap ( 6 ) of the first bypass channel ( 5 ) and a second air flow through the second bypass channel ( 7 ) by means of a second air flap ( 8th ) of the second bypass channel ( 7 ) are controlled such that even in the presence of a respective different pressure drop in the first bypass channel ( 5 ) and in the second bypass channel ( 7 ) through both bypass channels ( 5 . 7 ) in each case an equal air mass flow into the mixing space ( 4 ) is initiated. Method for operating an air conditioning system ( 1 ), the air conditioning ( 1 ) a blower ( 2 ) for the intake of air ( 12 ), an evaporator ( 3 ), one behind the evaporator ( 3 ) arranged mixing space ( 4 ), and a bypass device with a first bypass channel ( 5 ) and a second bypass channel ( 7 ), which lead to different sides of the mixing chamber ( 4 ) and with which part of the air ( 12 ) on the evaporator ( 3 ) is passed, characterized in that a first air flow through the first bypass channel ( 5 ) by means of an air flap of the first bypass channel ( 5 ) and a second air flow through the second bypass channel ( 7 ) are regulated by means of the air flap such that even in the presence of a respective different pressure drop in the first bypass channel ( 5 ) and in the second bypass channel ( 7 ) through both bypass channels ( 5 . 7 ) in each case an equal air mass flow into the mixing space ( 4 ) is initiated.

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