EP1881288A1 - Tube-fin-heat exchanger with connecting blocks - Google Patents

Abstract

The heat exchanger has two ribbed pipe blocks (1), which contain two collector pipes (2a,3a,2b,3b) on both the opposite sides and are in flow connection with each other. The collector pipes contain connecting or separator plates and contact or connection block (10). One contact or connection block cooperates with one connecting or separator plates.

Description

The invention relates to a heat exchanger, for example, condenser or gas cooler for the air conditioning of a motor vehicle having at least two fin-tube blocks having on both opposite sides of the fin-tube blocks at least two manifolds which are in fluid communication with each other, the Collecting tubes have closing or separating plates and connection or connection blocks,

This heat exchanger is known from European patent application no. EP 414 433 A2 known. As shown in FIG. 12, the two manifolds are in fluid communication with each other by means of two connecting blocks. The two connection blocks are attached as individual parts to a manifold and soldered there. In the subsequent assembly of the two tube-fin blocks of the heat exchanger, both connection blocks are screwed together. This heat exchanger, assembled after soldering, is not as stable against high pressures as it does with CO2 as a refrigerant.

It is also known to provide the ends of the headers with a slot to insert there a closure plate. The manufacturing cost of the known heat exchangers seems to be too high.

• Fig. 1 Ansicht der oberen Hälfte eines erfindungsgemäßen Kondensators;
• Fig. 2 Detailansicht einer Ecke des Kondensator mit einem Verbindungsblock;
• Fig. 3 horizontaler Schnitt aus Fig. 2 durch das Verschlussblech;
• Fig. 4 eine Draufsicht auf die Ecke des Kondensators aus Fig. 2;
• Fig. 5 ein vertikaler Schnitt durch den Verbindungsblock aus Fig. 2;
• Fig. 6 ein anderer horizontaler Schnitt durch den Verbindungsblock aus Fig. 2;
• Fig. 7 Detailansicht eines Anschlussblockes am Kondensator;
• Fig. 8 alternative Ausführung als Anschlussblock.
• Fig. 9 - 11 zeigen einer Weiterbildung als Verbindungs - oder Anschlussblock

The object of the invention is the simplified manufacturability of the heat exchanger.
The solution according to the invention is achieved by the use of the features of claim 1. The claims 2 to 8 contain further developing features.
Because at least one connection or connection block cooperates with at least one closure or separating plate, it is possible to dispense with its provisional attachment, for example by spot welding, during assembly of the parts, which simplifies manufacturability and / or reduces costs. In addition, the compressive strength of the capacitor and the torsional rigidity are improved. The closing or separating plate acts as a spacer between the headers.
Preferably, the collector and the connection -bzw. Connecting block have a lying at the same height slot into which the closure - or separating plate can be inserted. This type has proven itself in experiments in practice. Alternatively, however, it can be provided that the closure plate two side by side arranged cup-shaped formations, each molding is insertable in one end of the collector.
It may be that the port or connection block is a transfer block to direct the agent from one header to the other header.
It may as well be that the connection or connection block is an inlet or outlet block for introducing or removing the agent into one or both of the collectors.
It is envisaged that the cooperation between the connection block and the closure plate is that there is a slot in the block into which the closure plate can be inserted. During assembly, the connecting block between the two headers is then inserted first and then the closure plate is inserted.
The closing or separating plate can extend over adjacent collecting pipes or only through a single collecting pipe.
The flow connection between the headers can be performed either approximately parallel to the closing or separating plate or the same bridging.
Description of the invention with reference to the following figures:

• Fig. 1 view of the upper half of a capacitor according to the invention;
• Fig. 2 detail view of a corner of the capacitor with a connection block;
• Fig. 3 horizontal section of Figure 2 through the closure plate.
• Fig. 4 is a plan view of the corner of the capacitor of Fig. 2;
• Fig. 5 is a vertical section through the connection block of Fig. 2;
• Fig. 6 is another horizontal section through the connection block of Fig. 2;
• 7 shows a detailed view of a connection block on the capacitor;
• Fig. 8 alternative embodiment as a terminal block.
• FIGS. 9-11 show a further development as connection block or connection block

In Fig. 1 is a view of a portion of the heat exchanger according to the invention, in particular a gas cooler for using CO2 as a refrigerant, is shown. The condenser (gas cooler) has at least two fin-tube blocks 1 constructed of tubes 5 and ribs 6 between each two tubes 5, and a plurality of manifolds 2A, 2B, 3A, 3B at the tube ends for receiving the refrigerant. In the special type of condenser are two identical heat exchangers, one behind the other placed and connected together, in such a way that the one collector 2A and 3A are directly behind each other and are connected and also the other collectors 2B and 3B in the flow direction of the cooling air directly behind each other. This structure of the condenser has the advantage that the entire surfaces of the fin-tube blocks 1 are available for heat exchange. The left-hand collectors 2A and 3A in FIG. 1 and the right-hand collectors 2B and 3B are each connected to a connecting block 10 which cooperates with a closing or separating plate 4 .
Through the terminal block 20, which is formed, for example, as shown in Figure 7, the refrigerant is passed into the rear header 2A . It is distributed over the flat tubes 5 and flows into the collector 2B on the opposite side of the heat exchanger.
There, the connection block 10 directs the refrigerant from the collector 2B in the collector 3B located further to the front . Other necessary partitions 4 for subdivisions of the collector tubes 2 or 3 are not shown, but are used as needed and divert the refrigerant several times. The closure or separating plate 4 can be used for such purposes, both in cooperation with a connection or terminal block 10 as well as alone, that is, without the block 10. Also, a plurality of connection blocks 10 at the collectors 2 and 3 at any that is, be arranged by the skilled person to be provided bodies. Accordingly, the pictorial representations with closing or separating plates 4 lying at the ends of the collecting tubes 2, 3 and with connecting block or connecting block 10 should not be understood as limiting this. Furthermore, it should be pointed out that the closure or separating plate 4 could only be located on a single collector 2 or 3 , although the embodiments shown only show closure or separating plates 4 which extend over two adjacent collectors 2 and 3 .

FIG. 2 shows a detail of FIG. 1 enlarged. It is shown a corner of the capacitor. The two collectors 2A and 3A are connected to the connection block 10 . The closure plate 4 fixes the connecting block 10 at the desired locations, in this case in the region of the ends of the collector 2 and 3. It can be seen a flat tube 5 , an indicated rib 6 and a side plate 11 extending over the capacitor in its entirety Depth extends.

FIG. 3 shows a section in FIG. 2, which passes through the closure plate 4 . The closure plate 4 has an approximately B-shaped form. The two parts 4d and 4e are nearly circular. In the middle, they are connected to each other by a web 4c , from which a protrusion 4f protrudes, which engages in a gap 14 . This intermediate space 14 is formed from wall parts 202 of one collector 2, wall parts 302 of the other collector 3, and from the remainder 15r of the slot 15 in the connecting block 10. Depending on the shape of the collectors 2 and 3 , these parts 4c, 4d, 4e, and 4f and 202, 302, 15r, may be shaped to achieve the desired goal of pre-fixing the connection block 10 by the closure plate 4 . After soldering, a solid and dense structure is formed here. In order to insert the closure plate 4 , the collector 2 and 3 at the appropriate locations slots 205, 305 have. These slots 205, 305 are formed so that the parts of the collector wall 202, 302 remain in the central region. Likewise, a slot 15 must be present in the connection block 10 , in which the closure plate 4 is inserted.

Fig. 4 shows the end of the collector 2 and 3 in plan view. The connection block 10 and the closure plate 4 are slightly over. Alternatively, the closure plate 4 may also be formed so that it has two cup-shaped bulges, which are inserted into the ends of the collector 2 and 3 . (not shown) Fig. 5 shows a section other than Fig. 3 through the connecting block 10, namely a vertical section. The connecting block 10 has a flow-through opening 12 , through which the refrigerant from the collector 2 to the collector 3 can flow. Also, the slots 15 and 205 can be seen here. This is also clearly visible in FIG. The refrigerant is indicated by the dashed arrow 60 . The refrigerant flows from the small fluid channels 51 in the flat tubes 5 in the collector chamber 22 of the collector 2. From there it flows through the opening 23 of the header 2 in the flow opening 12 of the connecting block 10. Through the opening 33 of the header 3, the refrigerant enters the collecting space 32 of the collector 3, to then flow back into the small fluid channels 51 of the flat tubes 5 .

FIG. 7 shows an alternative embodiment in which a connection block 20 according to the invention is used. It has an inflow or outflow opening 25 through which the refrigerant enters or leaves the condenser can. This connection block 20 is also prefixed by the closure plate 4 in order then to obtain a fluid-tight connection during soldering. As a result of this prefixing, the connection block 20 can no longer slip vertically. He also can not fall, because he also in a soldering frame (not shown) is clamped.
The terminal block 20 can be attached anywhere, but then the collector 2 or 3 must be closed at the top or bottom by individual closure plates 4 .

Another alternative embodiment of the connection block 10 is shown in FIG. It shows a connection block 10 which is at the same time a connection block 20 . The refrigerant, again illustrated by a dashed arrow 60 , is supplied via feed lines 42 not shown in detail through the inlet opening 41 of the flow opening 12 . It is distributed, as shown, through the two openings 23 and 33 of the respective collector 2 and 3 to the collecting chambers 22 and 32 and then flows into the small fluid channels 51 of the flat tubes . 5

The connection block 10 with closure plate 4 proposed here can also be used in the case of more than two heat exchangers arranged one behind the other, which are to be connected to one another and fastened to one another. Are z. B. three heat exchangers placed one behind the other, so the connection block 10 of the type can be designed so that it connects with the flow opening 12, only two of the three heat exchangers. In extreme cases, even the flow-through opening 12 can be dispensed with in order to achieve only optimal fastening.

In contrast to the embodiments already described, FIGS. 9-11 show a development which, in addition to the advantages already mentioned, also offers the possibility of making the flow of the refrigerant more favorable and / or of adapting it to specific conditions of a gas cooler in a cooling module of a motor vehicle. As the figures show, an oblique through hole 12 was provided in the connection or connection block 10, which is provided here as a pure connection block 10 but could of course be designed as a connection block (or both), the ends of which are provided with corresponding holes 23, 33 in the Hoppers 2, 3 correspond. Thus, the refrigerant, for example, from an overhead portion of the one header pipe 2 in a lower portion of the other header pipe 3, or vice versa out become. It is also to be expected here with lower pressure loss, since the refrigerant is not deflected so abruptly.

Claims (9)

Heat exchanger, such as condenser or gas cooler for the air conditioning system of a motor vehicle having at least two ribbed tube blocks (1), on both opposite sides of the fin-tube blocks (1) at least two manifolds (2a, 3a) or (2b , 3b), which are in fluid communication with one another, the collecting tubes (2, 3) having closing or separating plates (4) and connecting blocks (10),
characterized in that at least one connecting and / or connecting block (10) cooperates with at least one closing or separating plate (4). Heat exchanger according to claim 1, characterized in that the closure or separating plate (4) extends over at least two collecting tubes (2A, 3A or 2B, 3B) and in a slot (15) of the connecting and / or connecting block (10). is arranged. Heat exchanger according to Claim 1, characterized in that the closure or separating plate (4) extends over a single collector tube (2 or 3) and is arranged in a slot (15) of the connection and / or connection block (10). Heat exchanger according to one of the preceding claims, characterized in that the closing or separating plate (4) is preferably arranged in a slot (205, 305) of the collector tube or tubes (2, 3). Heat exchanger according to claim 4, characterized in that the slots (205, 305) in the collecting pipes (2, 3) are preferably at the same height. Heat exchanger according to one of claims 1-5, characterized in that the connection or connection block (10) is a transfer block for directing the means from the one collector (2) into the other collector (3). Heat exchanger according to one of claims 1-5, characterized in that the connection or connection block (10) is an inlet or outlet block (20) for introducing or removing the agent into one or more collectors (2, 3). Heat exchanger according to claim 1, characterized in that the closure plate (4) has two juxtaposed cup-shaped formations, each formation in one end of the collector (2, 3) can be inserted. Heat exchanger according to one of the preceding claims, characterized in that the flow connection between the collecting tubes (2, 3) carried out by means of the connecting and / or connecting block (10) is either parallel to the closing or separating plate (4) or via the closing or separating plate (4).

Images