DE102019211698A1 - Heat exchanger and air conditioning housing with one heat exchanger - Google Patents

Abstract

The invention relates to a heat exchanger (1) with a tube-rib block (5) with tubes (6, 6 ') and ribs (7, 7'), and with at least one collecting tank (8), in particular with two collecting tanks (8), wherein the tubes (6, 6 ') of the tube-fin block (5) each have two tube ends (9) which engage in openings of the at least one collecting tank (8) for fluid connection of the at least one collecting tank (8) with the pipes (6, 6 '), the tubes (6, 6') of the tube-fin block (5) being arranged at a distance from one another transversely to their longitudinal direction (10) and the tube-fin block (5) having two outer tubes (6 ') in its transverse direction (11), and ribs (7) are arranged between the tubes (6, 6 '), ribs (7') also being arranged on the outside of the two outer tubes (6 '), the ribs (7`) , which are arranged on the outside of the outer tubes (6 ') of the tube-fin block (5) in a direction transverse to the longitudinal direction (10) of the tubes (6, 6') and also transversely protrude to the transverse direction (11) of the tube / fin block (5).

Description

Technical area

The invention relates to a heat exchanger and an air conditioning system housing with a heat exchanger, in particular for a motor vehicle.

Background of the invention

Air conditioning systems of motor vehicles have an air conditioning system housing in which, for example, the evaporator is arranged to cool the air that can flow through an air duct in the air conditioning system housing in order to temper and / or dehumidify the air before it is either heated again or blown directly into the vehicle interior . The evaporator is to be arranged and sealed in the housing in such a way that no leakage air is led past the evaporator because this leakage air portion is then also not cooled by the evaporator or is not sufficiently cooled. This leakage air portion is then basically at the temperature of the air flowing into the air duct or slightly colder and it is also not dehumidified by cooling in the evaporator. If this leakage air portion is then mixed again after the evaporator with the main air flow that has passed the cooling evaporator, the leakage air portion increases the humidity of the mixed air after the evaporator and possibly also the temperature of the mixed air after the evaporator, which is not desirable overall, because these two effects reduce the performance of the air conditioning system.

In order to reduce or even prevent the leakage air that flows past the evaporator, it is known in the prior art that foam strips or foam mats are arranged on the outside of the evaporator to seal against the air conditioning system housing, which, when the evaporator is installed, the gap between seal the evaporator and the air conditioning housing by compressing them in the gap and thus closing the gap as much as possible. However, such foam strips or foam mats are relatively expensive, both in terms of material costs and assembly costs.

Other known solutions provide that side parts are provided on the side of the evaporator, which serve for sealing. These side parts also mean an increase in costs in order to achieve the desired seal.

Presentation of the invention, task, solution, advantages

It is the object of the invention to create a heat exchanger and an air conditioning system housing with a heat exchanger which, compared to the prior art, allows improved sealing at reduced costs.

The object of the heat exchanger is achieved with the features of claim 1.

One embodiment of the invention relates to a heat exchanger with a tube / fin block with tubes and fins, and with at least one collecting box, in particular with two collecting boxes, the tubes of the tube / rib block each having two tube ends which engage in openings of the at least one collecting box for fluid connection of the at least one collecting tank with the pipes, the pipes of the pipe / fin block being arranged at a distance from one another transversely to their longitudinal direction and the pipe / fin block having two outer pipes or pipe rows in its transverse direction, and fins being arranged between the pipes, wherein ribs are also arranged on the outside of the two outer tubes, the ribs which are arranged on the outside of the outer tubes of the tube-fin block projecting in a direction transverse to the longitudinal direction of the tubes and also transversely to the transverse direction of the tube-fin block. This makes it possible for the protruding rib to rest against the receptacle for the heat exchanger in an air conditioning system housing and, if necessary, to be slightly deformed when the heat exchanger is inserted into the receptacle in order to provide a good adaptation to the receptacles, so that a sealed arrangement of the heat exchanger takes place in the receptacle, which reduces or prevents leakage air from flowing past the heat exchanger, so that the leakage air fraction can be kept as low as possible or even avoided entirely. By providing the protruding ribs, it is also advantageously avoided that expensive sealing means, such as foam elements, have to be glued on. The heat exchanger is preferably an evaporator, a radiator or the like. It is also possible that more than one such heat exchanger can be provided in an air conditioning system housing, for example an evaporator and a heating element.

In a further embodiment, it is also expedient if, furthermore, adjacent ribs or rows of ribs protrude in a direction transverse to the longitudinal direction of the tubes and also transversely to the transverse direction of the tube / fin block, to the ribs arranged on the outside of the outer tubes of the tube / fin block. This can, if necessary, improve the tightness.

It is also advantageous if all the ribs in a direction transverse to the longitudinal direction of the tubes and also transversely to the transverse direction of the tube / fin block protrude. As a result, an improved seal can also take place at the edge regions of the heat exchanger in relation to a receptacle.

It is also particularly advantageous if the protrusion of the ribs is provided relative to the tubes of the tube / fin block, relative to other ribs of the tube / rib block and / or relative to the collecting tank. It is thereby achieved that the protruding ribs can serve for sealing, the non-protruding ribs serving for heat transfer.

It is particularly advantageous if the at least one rib protrudes up to an edge of the collecting tank and / or beyond the edge of the collecting tank. As a result, due to a management board of the collecting tank, no gap is created opposite the pipes that is accessible for a leakage air flow.

It is also advantageous if the protrusion of the at least one rib is provided on the air inflow side and / or on the air outflow side of the heat exchanger. As a result, an improved seal against a leakage air flow can be ensured on one side or on both sides.

It is also particularly advantageous if the protrusion of the at least one rib takes place by moving the rib relative to the ribs that are not protruding. This uses the same type of rib that is translated to protrude as the ribs that do not protrude. This means that a separate type of rib does not have to be produced, which lowers costs because identical parts can be used.

It is also advantageous if the at least one rib protrudes by extending the rib relative to the non-protruding ribs. This ensures that, for example, the rib can also protrude on both sides and the heat transfer to the air flowing through is improved due to an elongated rib.

The problem relating to the air conditioning system housing is achieved with the features of claim 9.

An embodiment of the invention relates to an air conditioning system housing of an air conditioning system, the air conditioning system housing having walls which define at least one air duct for air to flow through, a receptacle being provided in the air conditioning system housing to accommodate a heat exchanger in an air duct, so that the heat exchanger can be removed from the Air flowing through the air duct can at least partially flow through, the heat exchanger being arranged in the receptacle and a gap between the heat exchanger and the receptacle being sealed by at least one protruding rib of the heat exchanger, the heat exchanger being a heat exchanger according to the invention.

It is also advantageous if ribs are provided in the area of the receptacle which protrude from a wall and / or the receptacle in order to achieve a secure positioning of the heat exchanger in the air conditioning system housing.

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

Figure list

The invention is explained in more detail below on the basis of several exemplary embodiments with reference to the figures of the drawings.

• 1 eine schematische, perspektivische Darstellung eines Wärmeübertragers,
• 2 eine schematische Teilschnittdarstellung eines Wärmeübertragers in einer Anordnung in einem Klimaanlagengehäuse gemäß dem Stand der Technik,
• 3 eine schematische Teilschnittdarstellung eines ersten Ausführungsbeispiels eines erfindungsgemäßen Wärmeübertragers in einer Anordnung in einem Klimaanlagengehäuse, und
• 4 eine schematische Teilschnittdarstellung eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Wärmeübertragers in einer Anordnung in einem Klimaanlagengehäuse.

Show it:

• 1 a schematic, perspective illustration of a heat exchanger,
• 2 a schematic partial sectional view of a heat exchanger in an arrangement in an air conditioning system housing according to the prior art,
• 3 a schematic partial sectional view of a first embodiment of a heat exchanger according to the invention in an arrangement in an air conditioning system housing, and
• 4th a schematic partial sectional view of a second embodiment of a heat exchanger according to the invention in an arrangement in an air conditioning system housing.

Preferred embodiment of the invention

The 1 shows a schematic, perspective illustration of a heat exchanger 1 how it can be designed according to the invention. The heat exchanger 1 is used in an air conditioning system housing of an air conditioning system, in particular a motor vehicle, in order to generate an air flow 2 to control the temperature, which through the heat exchanger 1 flows. The heat exchanger 1 is connected to a fluid circuit to allow a cooling or a warming fluid through the heat exchanger 1 to direct. The inlet and outlet pipes are for this purpose 3 , 4th intended. A refrigerant of a refrigerant circuit, such as R134a, R1234yf, R744, etc., or a cooling fluid of an internal combustion engine or another heat source, such as a water mixture, for example, can serve as the fluid. The heat exchanger 1 can therefore be used, for example, as an evaporator or as a radiator.

The heat exchanger 1 has a tube-fin block 5 with pipes 6th and ribs 7th on. Thereby the pipes 6th A first fluid flows through it on the inside and a second fluid, such as air, flows around the outside, which also flows around the ribs 7th flows around. The pipes 6th can for example be arranged in a row or in two or more rows.

The heat exchanger 1 has at least one collecting box 8th , preferably two collecting boxes 8th on, see 1 , being in the collecting boxes 8th Optional partition walls (not shown) with or without passage openings can also be provided in order to separate collecting chambers from one another or to connect deflecting chambers to one another.

The pipes point 6th of the tube-fin block 5 two pipe ends each 9 on, which in openings of the at least one collecting tank 8th engage for the fluid connection of the at least one collecting tank 8th with the pipes 6th . The pipes 6th are arranged in the openings in a sealed manner, for example soldered, welded or glued.

In 1 can also be seen that the pipes 6th of the tube-fin block 5 transverse to their longitudinal direction 10 are spaced apart and the tube-fin block 5 two outer tubes each 6 ' in its transverse direction 11 having, and wherein between the tubes 6th , 6 ' each rib 7th are arranged, also on the outside of the two outer tubes 6 ' Ribs 7 ' are arranged.

The 2 In comparison, shows a partial section through a heat exchanger 1 in an arrangement in an air conditioning case 50 according to the prior art, in which an externally disposed rib 7 ' is provided, which opposite the overhang of the collecting tank 8th , which rests on the air conditioner housing, is set back and a gap 51 between the rib 7 ' and the air conditioner case 50 caused.

According to the prior art, the gap is sealed 51 a foam material 52 arranged as strips or as a mat. The strip or mat of foam material 52 is on the edge of the heat exchanger 1 , i.e. on the outer rib 7 ' or one on the rib 7 ' attached side panel. The foam material 52 becomes when inserting the heat exchanger 1 at least partially compresses and thus seals the gap 51 from. But this is at least with the cost of the foam material 52 , a fastening means such as adhesive, the logistic costs and the assembly.

The 3 and 4th each show a partial section through a heat exchanger 1 in an arrangement in an air conditioning case 50 according to a respective first or second embodiment of the invention.

Here is the heat exchanger 1 each according to 1 designed as an example and it is transverse to the air flow direction on both sides 12 and in the transverse direction 11 of the heat exchanger an externally arranged rib 7 ' intended.

The ribs stand 7 ' the outside of the outer tubes 6 ' of the tube-fin block 5 are arranged in a direction transverse to the longitudinal direction 10 of the pipes 6th , 6 ' and also across the transverse direction 11 of the tube-fin block 5 in front of, i.e. in the direction of air flow 12 .

In 3 can be seen that a rib 7 ' is provided, which on the air inflow side 20th of the heat exchanger 1 protrudes to the gap 51 close.

In 4th can be seen that a rib 7 ' is provided, which on the air inflow side 20th and on the air outlet side 21st of the heat exchanger 1 protrudes to the gap 51 close.

The protrusion of at least one rib 7 ' lies by 3 on the air inflow side 20th , in 4th both on the air inflow side 20th as well as on the air outlet side 21st It is also possible that the protrusion is only on the air outlet side 21st is provided.

The other ribs 7th are according to the 3 and 4th each opposite the overhang of the collecting tank 8th set back.

In a further exemplary embodiment, which is not shown, it is also possible and advantageous if, furthermore, also to the outside of the outer tubes 6 ' of the tube-fin block 5 arranged ribs 7 ' adjacent ribs 7th or rows of ribs of ribs 7th , in a direction transverse to the longitudinal direction 10 of the pipes 6th , 6 ' and also across the transverse direction 11 of the tube-fin block 5 protrude. All ribs can optionally be used 7th , 7 ' in a direction transverse to the longitudinal direction 10 of the pipes 6th , 6 ' and also across the transverse direction 11 of the tube-fin block 5 protrude.

The amount of protrusion is such that the protruding ribs protrude 7 ' , 7th a protrusion towards the pipes 6th , 6 ' of the tube-fin block 5 , opposite other ribs 7th of the tube-fin block 5 and / or opposite the collecting box 8th is. The 3 and 4th show a protrusion of the ribs 7 ' opposite the pipes 6th , 6 ' and the ribs 7th to the extent to which the collecting tank protrudes 8th . Here is the overhang 57 of the collecting box 8th a distance between the end of the pipe and the edge of the collecting tank 8th . The protrusion of at least one rib 7 ' , 7th is advantageous up to one edge of the collecting tank 8th , can optionally also over the edge of the collecting tank 8th also be provided, depending on the embodiment.

If you look at the 3 It can be seen that the protrusion of at least one rib 7 ' by moving the rib 7 ' opposite the non-protruding ribs 7th he follows. Alternatively, the protrusion of the at least one rib 7 ' also by extending the rib 7 ' opposite the non-protruding ribs 7th respectively. This is particularly the case with ribs protruding on both sides 7 ' , please refer 4th , the most sensible design. Optionally, two half ribs could also be used 7 ' each be shifted, but this is not shown.

The 3 and 4th also indicate that the air conditioning case 50 an air conditioning system, in particular a motor vehicle, walls 53 having at least one air duct 54 define for the flow of air, being in the air conditioning housing 50 a recording 55 is provided to a heat exchanger 1 in an air duct 54 so that the heat exchanger 1 from which the air duct 54 air flowing through 2 can at least partially flow through. It is also shown that the heat exchanger 1 in the recording 55 is arranged and a gap 51 between the heat exchanger 1 and the recording 55 by at least one protruding rib 7 ' of the heat exchanger 1 is sealed. It can also be advantageous if in the area of the recording 55 Ribs 56 are provided as webs or steps, etc., which are from a wall 53 and / or the recording 55 protrude to secure positioning of the heat exchanger 1 in the air conditioner housing 50 to reach.

There can also be ribs integrally connected to the housing of the air conditioner in the gap 51 protrude to improve the leakage. Ideally, the ribs in the direction of flow are between 0.1 and 0.9 mm on each side smaller than the collecting box, so that sufficient sealing and protection of the ribs against damage is guaranteed until they are installed in an air conditioning system housing.

Ideally, the seal is made by extending the ribs 7 ' by the gap 51 is reduced between the overhang of the collecting tank and the rib entry level and / or exit level. Air coming through the side gap 51 flows, must then flow through the ribs or corrugated ribs at least in the inlet and outlet area and is thereby cooled. The amount of air that passes through the area between the last pipe is also reduced 6 ' and housing wall 53 flows as a result of the pressure losses through deflections, constrictions and expansion, i.e. a labyrinth sealing effect. This reduced amount of air at the ends of the heat exchanger is then in terms of amount, speed, humidity and temperature harmless for the functionality and negligible for a reduction in efficiency.

Claims (10)

Heat exchanger (1) with a tube / rib block (5) with tubes (6, 6 ') and ribs (7, 7'), as well as with at least one collecting tank (8), in particular with two collecting tanks (8), the pipes ( 6, 6 ') of the pipe / rib block (5) each have two pipe ends (9) which engage in openings of the at least one collecting tank (8) for fluid connection of the at least one collecting tank (8) to the pipes (6, 6'), wherein the tubes (6, 6 ') of the tube / fin block (5) are arranged at a distance from one another transversely to their longitudinal direction (10) and the tube / fin block (5) has two outer tubes (6') in its transverse direction (11) , and wherein ribs (7) are arranged between the tubes (6, 6 '), ribs (7') also being arranged on the outside of the two outer tubes (6 '), characterized in that the ribs (7`), which are arranged on the outside of the outer tubes (6 ') of the tube-fin block (5), in a direction transverse to the longitudinal direction (10) of the tubes (6, 6') and also transversely to the The transverse direction (11) of the tube / fin block (5) protrudes. Heat exchanger (1) Claim 1 , characterized in that furthermore ribs (7) or rows of ribs (7) adjacent to the ribs (7 ') arranged on the outside of the outer tubes (6') of the tube-rib block (5), in a direction transverse to the longitudinal direction (10) of the tubes (6, 6 ') and also transversely to the transverse direction (11) of the tube-fin block (5) protrude. Heat exchanger (1) Claim 1 or 2 , characterized in that all the ribs (7, 7 ') protrude in a direction transverse to the longitudinal direction (10) of the tubes (6, 6') and also transversely to the transverse direction (11) of the tube-fin block (5). Heat exchanger (1) Claim 1 , 2 or 3 , characterized in that the protrusion of the ribs (7, 7 ') is a protrusion relative to the tubes (6, 6') of the tube-fin block (5), relative to other ribs (7, 7 ') of the tube-fin block (5) and / or is provided opposite the collecting box (8). Heat exchanger (1) Claim 1 , 2 , 3 or 4th , characterized in that the protrusion of the at least one rib (7, 7 ') up to an edge of the collecting tank (8) and / or over the edge of the collecting tank (8) is also provided. Heat exchanger (1) according to one of the preceding claims, characterized in that the protrusion of the at least one rib (7, 7 ') is provided on the air inflow side (20) and / or on the air outflow side (21) of the heat exchanger (1). Heat exchanger (1) according to one of the preceding claims, characterized in that the protrusion of the at least one rib (7, 7 ') takes place by shifting the rib (7, 7') with respect to the non-protruding ribs (7). Heat exchanger (1) according to one of the preceding claims, characterized in that the at least one rib (7, 7 ') protrudes by extending the rib (7, 7') relative to the non-protruding ribs (7). Air conditioning housing (50) of an air conditioning system, the air conditioning system housing (50) having walls (53) which define at least one air duct (54) for air to flow through, with a receptacle (55) being provided in the air conditioning system housing (50) for a heat exchanger (1) in an air duct (54) so that the air flowing through the air duct (54) can at least partially flow through the heat exchanger (1), the heat exchanger (1) being arranged in the receptacle (55) and a gap ( 51) between the heat exchanger (1) and the receptacle (55) is sealed by at least one protruding rib (7, 7 ') of the heat exchanger (1), the heat exchanger (1) being a heat exchanger (1) according to one of the preceding claims . Air conditioning housing (50) Claim 9 , characterized in that ribs (7, 7 ') are provided in the area of the receptacle (55) which protrude from a wall (53) and / or the receptacle (55) in order to secure positioning of the heat exchanger (1) in the air conditioning housing (50) to achieve.

Images