DE102021207517A1 - air conditioner - Google Patents

Abstract

The invention relates to an air conditioning device (1), in particular for an air conditioning system in a motor vehicle, having a housing (2) which has at least one air duct (3) and a fan (4) for generating an air flow in the at least one air duct (3). , wherein at least one heat exchanger (6) is arranged in the housing (2), through which the air flow (5) can flow, the housing (2) forming a receptacle (8) in which the heat exchanger (6) is accommodated, wherein the at least one air duct (3) is arranged in such a way that the heat exchanger (6) traverses the air duct (3), web-like sealing means (9) being provided, which are arranged downstream of the heat exchanger (6) and on the heat exchanger (6) on its downstream air side (10).

Description

technical field

The invention relates to an air conditioning device, in particular for an air conditioning system in a motor vehicle, having a housing with an air duct and having a fan for generating an air flow in the air duct and having a heat exchanger arranged in the air duct.

State of the art

Air conditioners for air conditioning systems for motor vehicles are typically arranged in the motor vehicle interior and generate temperature-controlled air which is blown into the passenger compartment in order to provide the passengers with a pleasant climate. For this purpose, heat exchangers are arranged in the air conditioning unit, which are either operated electrically or which are supplied with a fluid from outside the air conditioning unit. For example, evaporators are known which are supplied with a refrigerant from a refrigerant circuit. Radiators are also known, which are supplied with a heated coolant.

At least one such heat exchanger is arranged in the housing of the air conditioner, which also defines at least one air duct, so that the air flow in the at least one air duct traverses the heat exchanger or heat exchangers in order to bring about temperature control of the air. The air flow is generated by a blower, which conveys air into an air duct of the housing in order to direct the air through the air duct and to be able to control the temperature of the air.

The heat exchanger or the heat exchangers are to be arranged in the housing in such a way that as little leakage air as possible unintentionally flows past the heat exchanger, because this leads to reduced effectiveness.

In order to avoid this, in the prior art the heat exchanger is arranged in a receptacle of the housing and foam material strips are placed on its outside, which serve as sealing strips with respect to the receptacle of the housing. However, this leads to increased costs because the foam material has to be manufactured separately and attached to the heat exchanger.

Presentation of the invention, task, solution, advantages

It is therefore the object of the present invention to create an air conditioning device which has reduced leakage air in the area of at least one heat exchanger and which can nevertheless be produced at low cost.

The object is achieved with the features of claim 1 or claim 2.

One exemplary embodiment of the invention relates to an air conditioning device, in particular for an air conditioning system in a motor vehicle, with a housing that has at least one air duct and with a fan for generating an air flow in the at least one air duct, with at least one heat exchanger being arranged in the housing, which the air flow can flow through, the housing forming a receptacle in which the heat exchanger is accommodated, the at least one air duct being arranged in such a way that the heat exchanger traverses the air duct, web-like sealing means being provided which are arranged downstream of the heat exchanger and on which Fit heat exchanger on its airflow downstream side. As a result, a direct inflow of air can be provided upstream without expensive foam material sealing means and yet there is no or only a small and acceptable leakage flow past the heat exchanger. This makes an advantageous contribution to cost savings.

A further exemplary embodiment of the invention relates to an air conditioning unit, in particular for an air conditioning system in a motor vehicle, with a housing which has at least one air duct and with a fan for generating an air flow in the at least one air duct, with at least one heat exchanger being arranged in the housing, which through which the air flow can flow, the housing forming a receptacle in which the heat exchanger is accommodated, the at least one air duct being arranged in such a way that the heat exchanger traverses the air duct, web-like sealing means being provided, which are arranged downstream and upstream of the heat exchanger and abutting the heat exchanger on its downstream air side and upstream air side. As a result, a direct flow can also be provided upstream of the air without expensive foam material sealing means, and yet there is no or only a small and acceptable leakage flow past the heat exchanger. This makes an advantageous contribution to cost savings.

It is also particularly advantageous if the web-like sealing means comprise one or more webs which bear against the heat exchanger, in particular bear against the at least one header tank or both header tanks of the heat exchanger. In particular, on both sides of the air duct, ie across the Luftströ Direction of measurement distributed webs provided, for example, to achieve a seal on both sides of the tube-fin block.

According to a further exemplary embodiment, it is also expedient if one web, a plurality of webs or all webs is or are designed with an I-shape, T-shape, C-shape, V-shape or W-shape or some other cross-section. This ensures good stability of the web and secure contact with the seal.

It is also advantageous if one web, several webs or all webs are aligned parallel or at an angle to a flow direction of the air duct and protrude from the housing. This achieves a secure seal and good manufacturability.

In a further exemplary embodiment, it is also advantageous if the web-like sealing means comprise two webs which are arranged at a distance from one another and bear against the heat exchanger. The two webs serve particularly advantageously for lateral sealing at opposite end regions of the heat exchanger.

It is also advantageous if the two webs are arranged essentially parallel to one another and at a distance from one another. This ensures that the air duct can run between the webs.

It is also advantageous if the at least one web or the two webs is/are connected to the housing or to a respective wall of the housing or is/are formed in one piece therewith. With this design, a cost-effective design can be achieved, in particular when the web is formed in one piece with the housing, in particular when it is formed together with the housing as an injection-molded part.

It is also advantageous if the receptacle forms at least one chamber or forms two chambers located opposite one another, in which an end area or in which end areas of the heat exchanger are arranged. Due to the design of the chamber, the respectively provided end area of the heat exchanger can be accommodated and sealed in a defined manner. Good air flow guidance can also be achieved with the chamber and the walls forming this chamber.

It is also advantageous if the receptacle forms at least one first chamber in which a collecting box of the heat exchanger is at least partially arranged. As a result, the collecting box of the heat exchanger or the collecting boxes of the heat exchanger can be provided in the chamber or in the chambers, which means that the collecting boxes are arranged securely and, for example, connecting lines can run in a defined manner.

It is also expedient if the receptacle forms at least one second chamber in which a header box of the heat exchanger or an end region of the heat exchanger opposite a header box is at least partially arranged. This also results in a defined arrangement of the heat exchanger.

It is also advantageous if the heat exchanger has a tube and fin block with at least one header box or with two header boxes and the at least one web or the two webs are located on an edge area of the header box and/or the tube and fin block on the Heat exchanger creates or create. A good or adequate seal is thus achieved.

It is also advantageous if the at least one web or the two webs are located on a respective header box adjacent to a tube or on a header box in the area between tubes of the tube-fin block or in the area of the last tubes or in the area of the last tube of the tube - Laying or laying fin blocks on the heat exchanger. This also achieves a good or adequate seal.

It is also expedient if the heat exchanger has connection lines for supplying and removing a fluid to the heat exchanger or from the heat exchanger, with the connection lines running at least partially in one of the chambers or one of the connecting lines running at least partially in each case in one of the chambers. A good or adequate seal is thus achieved and at the same time the connection lines are kept out of the air flow at least in certain areas.

It is also particularly advantageous if at least one of the chambers has an airflow upstream wall which has an opening for the passage of at least one of the connecting lines or both connecting lines. The wall is used to guide the air to the tube-fin block of the heat exchanger, whereby it also delimits the chamber as far as necessary and still allows the connection lines to run out of the chamber in a favorable manner.

It is advantageous if in the chamber in the implementation of at least one of the is Connecting lines or both connecting lines a filler piece is provided to seal the chamber. It can thereby be achieved that the air flow into the chamber is reduced. The filler piece is optionally designed to be sound-transparent.

It is also advantageous if the chamber serves as an acoustic chamber and/or the chamber has a volume expansion which serves as an acoustic chamber. A noise reduction can thus be achieved.

Advantageous developments of the present invention are described in the dependent claims and in the following description of the figures.

character list

• 1 eine schematische Teilschnittansicht eines Teils eines erfindungsgemäßen Klimageräts,
• 2 eine schematische Teilschnittansicht eines abgeänderten Ausführungsbeispiels,
• 3 eine weitere schematische Schnittansicht eines abgeänderten Ausführungsbeispiels,
• 4 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal,
• 5 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal,
• 6 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal,
• 7 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal,
• 8 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal,
• 9 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal, und
• 10 eine schematische Schnittansicht des Wärmeübertragers im Luftkanal.

The invention is explained in detail below using exemplary embodiments with reference to the drawings. In the drawings show:

• 1 a schematic partial sectional view of a part of an air conditioner according to the invention,
• 2 a schematic partial sectional view of a modified embodiment,
• 3 a further schematic sectional view of a modified embodiment,
• 4 a schematic sectional view of the heat exchanger in the air duct,
• 5 a schematic sectional view of the heat exchanger in the air duct,
• 6 a schematic sectional view of the heat exchanger in the air duct,
• 7 a schematic sectional view of the heat exchanger in the air duct,
• 8th a schematic sectional view of the heat exchanger in the air duct,
• 9 a schematic sectional view of the heat exchanger in the air duct, and
• 10 a schematic sectional view of the heat exchanger in the air duct.

Preferred embodiment of the invention

the 1 shows an air conditioning unit 1, in particular for an air conditioning system of a motor vehicle, in a schematic partial sectional view. The air conditioner 1 has a housing 2 with at least one air duct 3 arranged therein. The air duct 3 can or the air ducts can advantageously also be divided into sub-ducts or several air ducts can also be provided which carry air at different temperatures and/or carry air for different areas of the motor vehicle, for example.

The air conditioner 1 has a fan 4 for generating an air flow 5 in the air duct 3 or through the air duct 3 . Since such fans 4 are known in principle, they will not be discussed further here.

At least one heat exchanger 6 is arranged in the housing 2 . Several heat exchangers can also be provided, for example an evaporator as the first heat exchanger 6 and/or a heater or the like. For this purpose, the heat exchanger 6 has a tube and fin block 7 through which the air flow 5 can flow.

The housing 2 forms a receptacle 8 in which the heat exchanger 6 is accommodated. The receptacle 8 is formed, for example, by wall parts of the housing 2, which can be external walls or internal walls.

The at least one air duct 3 is arranged in such a way that the heat exchanger 6 traverses the air duct 3 . In this way, the heat exchanger 6 can control the temperature of the air flowing through the air duct 3 .

In order to avoid or reduce leakage air flowing past the heat exchanger 6 and not being heated by the heat exchanger 6, the heat exchanger 6 is arranged in the housing 2 and the housing 2 is designed in such a way that web-like sealing means 9 are provided, which are downstream of the heat exchanger 6 and are in contact with the heat exchanger 6 on its air flow downstream side 10 and/or on the air flow upstream side 20 . The result of this is that air flowing around the side of the heat exchanger 6 is throttled at these web-like sealing means 9, which are designed in particular as webs 11, or flow around is even blocked.

In the exemplary embodiment shown, the web-like sealing means 9 are configured as a web 11 or as a plurality of webs 11 , which rests or rest on the heat exchanger 6 . Thus, for example, one web 11 or two webs 11 or more can be spaced apart from each other on a lateral side of the heat exchanger 6 .

It is thus advantageous if the web-like sealing means 9 comprise two webs 11 which are arranged at a distance from one another and bear against the heat exchanger 6 . In this case, a web 11 can rest against and seal off a lateral side of the heat exchanger 6 .

The at least two webs 11 are preferably arranged essentially parallel to one another and at a distance from one another. They run, for example, parallel along an extension of the heat exchanger 6, for example from one collecting tank to another collecting tank.

For simple and cost-effective production of the housing 2 and the webs 11, it is also advantageous if the at least one web 11 or the two webs 11 is or are connected to the housing 2 or to a respective wall of the housing 2 or formed integrally therewith . Advantageously, the housing 2 is injection molded with webs 11 and/or with a wall 12 and webs 11 made of plastic.

In the exemplary embodiment shown, the receptacle 8 forms at least one chamber 13 or two chambers 13 lying opposite one another, in which an end region or in which end regions of the heat exchanger 6 are arranged.

The embodiment of 1 shows that the receptacle 8 for the heat exchanger 6 forms at least one first chamber 13, in particular also two chambers 13 here, in which a collection box 14 of the heat exchanger 6 is at least partially arranged. the 2 shows this in an enlarged view.

The heat exchanger is in 1 arranged such that it extends from the first chamber 13, at the top of the picture, towards the second chamber 13, at the bottom of the picture, and the lower collecting tank 14 extends quasi below the picture plane and the upper collecting tank 14 above the picture plane from the first chamber 13 towards the second chamber 13 extends.

The receptacle 8 forms two chambers 13, a first chamber 13 and a second chamber 13, so that in the first chamber 13 and optionally also in the second chamber 13, in particular in each case, a collecting box 14 of the heat exchanger 6 or a collecting box 14 opposite end region of the heat exchanger 6 is at least partially arranged.

the 1 and 2 show that the heat exchanger 6 has a tube-fin block 7, at least one header tank 14 or two header tanks 14, depending on the design, and the at least one web 11 or the two webs 11 are each on an edge region 15 of the header tank 14 and/or of the tube-fin block 7 applies or applies to the heat exchanger 6, according to the invention downstream of the air.

It is advantageous if the at least one web 11 or the two webs 11 are adjacent to the collecting tank 14 or the collecting tanks 14 or to the respective collecting tank 14 or the collecting tanks 14 to a tube or in the area between tubes of the tube-rib Blocks 7 applies to the heat exchanger 6 or create. This is particularly advantageous when the collection box 14 protrudes slightly in relation to the tubes and/or ribs.

From the 1 and 2 or the 3 it can also be seen that the heat exchanger 6 has connection lines 16 for supplying and removing a fluid to the heat exchanger 6 or from the heat exchanger 6. The connection lines 16 run from a collecting tank 14 or alternatively and optionally also from both collecting tanks 14, for example in one of the chambers 13, at least in part, or one of the connecting lines 16 in each of the chambers 13, at least in part. In 3 it can be seen that in the exemplary embodiment shown, both connecting lines 16 run partially in a chamber 13 and then leave the chamber 13 . It is advantageous if at least one of the chambers 13 has an airflow wall 17 which has an opening 18 for the passage of at least one of the connecting lines 16 or both connecting lines 16 . The chamber 13 is therefore open for the connection lines 16 to pass through.

In one example, it can also be advantageous if a filler piece for sealing the chamber 13 is provided in the chamber 13 in the area of the passage of at least one of the connecting lines 16 or both connecting lines 16 .

Furthermore, the chamber 13 can also serve as an acoustic chamber in order to achieve acoustically dampening effects. For this purpose, the chamber 13 can have a volume expansion 19 which can serve as an acoustic chamber on its own or with the chamber 13 .

the 4 shows a vertical partial section of a heat exchanger 6 in a view of how it is arranged in an air duct 3 of the housing 2 . The heat exchanger 6 has at least one collecting box 14 which protrudes on both sides in relation to the tube-fin block 7, that is to say upstream and downstream of the air. The webs 11 are located upstream and downstream of the air at the collection box 14 in the area of the supernatant. The webs 11 each extend on the one hand in the vertical direction V and in the air flow direction L, so that they form a plane or surface that is spanned by L and V.

the 5 shows a horizontal partial section through the heat exchanger 6 arranged in the air duct 3 at the height of the tube-fin block 7. Here, tubes 21 and ribs 22 are arranged in alternating rows, with the tubes 21 in this example being arranged in pairs and with one rib 22, such as a corrugated rib, alternate. Alternatively, instead of the two tubes 21 in a row, only one tube 21 can be provided in a row, which can also have a bead for separating the fluid path, for example.

It can be seen that the tube-fin block 7 with the rows of tubes 21 and ribs 22 ends laterally with a rib 22, the webs 11 abutting the first tube 21 next to the end rib 22 upstream and downstream of the air.

the 6 shows a heat exchanger 6 which is arranged in a receptacle 8 with a chamber 13, the chamber 13 forming a volume-increasing projection above the lower collecting tank 14 in order to enlarge the chamber 13 in the area where the connection lines 16 pass through.

the 7 shows a horizontal partial section through the heat exchanger 6 arranged in the air duct 3 at the height of the tube-fin block 7. Here, tubes 21 and ribs 22 are arranged in alternating rows, with the tubes 21 in this example being arranged in pairs and with one rib 22, such as a corrugated rib, alternate. Alternatively, instead of the two tubes 21 in a row, only one tube 21 can be provided in a row, which can also have a bead for separating the fluid path, for example.

It can be seen that the tube-fin block 7 with the rows of tubes 21 and ribs 22 ends laterally with a rib 22, the webs 11 bearing against the collecting box 14 upstream and downstream of the air. The respective web 11 has a T-shaped end section.

the 8th shows a horizontal partial section through the heat exchanger 6 arranged in the air duct 3 at the height of the tube-fin block 7. Here, tubes 21 and ribs 22 are arranged in alternating rows, with the tubes 21 in this example being arranged in pairs and with one rib 22, such as a corrugated rib, alternate. Alternatively, instead of the two tubes 21 in a row, only one tube 21 can be provided in a row, which can also have a bead for separating the fluid path, for example.

It can be seen that the tube-fin block 7 with the rows of tubes 21 and ribs 22 ends laterally with a rib 22, the webs 11 bearing against the collecting box 14 upstream and downstream of the air. A bypass flow 23 can flow around the tube-fin block 7 at the level of the tube-fin block 7, so that additional webs 24 can be arranged in the receptacle 8 at the end, which protrude adjacent to the end-side rib 22 in order to avoid the bypass flow 23 to disturb. The respective web 11 has an L-shaped end section.

the 9 shows a horizontal partial section through the heat exchanger 6 arranged in the air duct 3 at the height of the tube-fin block 7. Here, tubes 21 and ribs 22 are arranged in alternating rows, with the tubes 21 in this example being arranged in pairs and with one rib 22, such as a corrugated rib, alternate. Alternatively, instead of the two tubes 21 in a row, only one tube 21 can be provided in a row, which can also have a bead for separating the fluid path, for example.

It can be seen that two webs 11 which are arranged adjacent to one another and rest on the collecting tank 14 are arranged downstream and upstream of the tube-fin block 7 . The webs 11 are I-shaped in section.

the 10 shows a horizontal partial section through the heat exchanger 6 arranged in the air duct 3 at the height of the tube-fin block 7. Here, tubes 21 and ribs 22 are arranged in alternating rows, with the tubes 21 in this example being arranged in pairs and with one rib 22, such as a corrugated rib, alternate. Alternatively, instead of the two tubes 21 in a row, only one tube 21 can be provided in a row, which can also have a bead for separating the fluid path, for example.

It can be seen that a web 11 with a V-shaped cross-section is arranged downstream and upstream of the tube-fin block 7 and rests on the collecting tank 14 . The webs 11 rest against the collection box 14 with the two end regions of the V.

Claims (17)

Air conditioning device (1), in particular for an air conditioning system in a motor vehicle, having a housing (2) which has at least one air duct (3) and having a blower (4) for generating an air flow in the at least one air duct (3), wherein in the Housing (2) at least one heat exchanger (6) is arranged, through which the air flow (5) can flow, the housing (2) forming a receptacle (8) in which the heat exchanger (6) is accommodated, the at least one air duct (3) is arranged in such a way that the heat exchanger (6) traverses the air duct (3), characterized in that web-like sealing means (9) are provided, which are arranged downstream of the heat exchanger (6) and on the heat exchanger (6). its downstream air side (10). Air conditioning device (1), in particular for an air conditioning system in a motor vehicle, having a housing (2) which has at least one air duct (3) and having a blower (4) for generating an air flow in the at least one air duct (3), wherein in the Housing (2) at least one heat exchanger (6) is arranged, through which the air flow (5) can flow, the housing (2) forming a receptacle (8) in which the heat exchanger (6) is accommodated, the at least one air duct (3) is arranged in such a way that the heat exchanger (6) traverses the air duct (3), characterized in that web-like sealing means (9) are provided, which are arranged upstream and downstream of the heat exchanger (6) and are attached to the heat exchanger (6 ) on its downstream air side (10) and upstream air side (20). Air conditioner (1) after claim 1 or 2 , characterized in that the web-like sealing means (9) comprise one or more webs (11) which bear against the heat exchanger (6), in particular the at least one collecting tank (14) of the heat exchanger (6). Air conditioner (1) after claim 1 , 2 or 3 , characterized in that a web (11), several webs (11) or all webs (11) is or are in section I-shaped, T-shaped, C-shaped, V-shaped or W-shaped or otherwise. Air conditioner (1) after claim 1 , 2 , 3 or 4 , characterized in that a web (11), several webs (11) or all webs (11) are aligned parallel or obliquely to a flow direction of the air duct (3) and protrude from the housing (2). Air conditioner (1) after claim 1 , 2 , 3 , 4 or 5 , characterized in that the web-like sealing means (9) comprise two webs (11) which are arranged at a distance from one another and bear against the heat exchanger (6). Air conditioner (1) after claim 1 , 2 , 3 , 4 , 5 or 6 , characterized in that the two webs (11) are arranged substantially parallel to one another and spaced apart from one another. Air conditioner (1) after claim 1 , 2 , 3 , 4 , 5 , 6 or 7 , characterized in that the at least one web (11) or the two webs (11) is connected to the housing (2) or to a respective wall (12) of the housing (2) or is formed in one piece therewith. Air conditioner (1) according to one of Claims 1 until 8th , characterized in that the receptacle (8) forms at least one chamber (13) or forms two opposite chambers (13), in which an end area or in which end areas of the heat exchanger (6) are arranged. Air conditioner (1) after claim 9 , characterized in that the receptacle (8) forms at least one first chamber (13) in which a collection box (14) of the heat exchanger (6) is at least partially arranged. Air conditioner (1) after claim 9 or 10 , characterized in that the receptacle (8) forms at least one second chamber (13), in which a collecting box (14) of the heat exchanger (6) or an end region of the heat exchanger (6) opposite a collecting box (14) is at least partially arranged. Air conditioning device (1) according to one of the preceding claims, characterized in that the heat exchanger (6) has a tube-fin block (7) with at least one collecting box (14) or with two collecting boxes (14) and the at least one web ( 11) or the two webs (11) abut or abut in each case on an edge region (15) of the collecting tank (14) and/or the tube-fin block (7) on the heat exchanger (6). Air conditioning device (1) according to one of the preceding claims, characterized in that the at least one web (11) or the two webs (11) on a respective collecting box (14) adjacent to a pipe (21) or on a collecting box (14) in Area between tubes (21) of the tube-fin block (7) or in the area of the last tubes (21) or in the area of the last tube (21) of the tube-fin block (7) rests against the heat exchanger (6) or . issue. Air conditioning device (1) according to one of the preceding claims, characterized in that the heat exchanger (6) has connection lines (16) for supplying and removing a fluid to the heat exchanger (6) or from the heat exchanger (6), the connection lines (16 ) run at least partially in one of the chambers (13) or run at least partially one of the connecting lines (16) in each case in one of the chambers (13). Air conditioning device (1) according to one of the preceding claims, characterized in that at least one of the chambers (13) has an airflow upstream wall (17) which has an opening (18) for the passage of at least one of the connecting lines (16) or both connecting lines (16). having. Air conditioner (1) after claim 15 , characterized in that in the chamber (13) in the area of the passage of at least one of the connection lines (16) or both connection lines (16) a filler piece is provided for sealing the chamber (13), the filler piece optionally being made sound-transparent. Air conditioner (1) according to one of the preceding claims 9 until 16 , characterized in that the chamber (13) serves as an acoustic chamber and/or the chamber (13) has a volume expansion (19) which serves as an acoustic chamber.

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