JPH037873B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a heat exchanger for two fluidized media, in particular liquids, which is provided with an inlet and an outlet for both media and a lid. and a nesting member for allowing the two media to flow separately while exchanging heat, at least the nesting member being manufactured as a pressure cast article.

BACKGROUND OF THE INVENTION A heat exchanger of this kind is disclosed in West German patent application no. 3542721.3, by the same applicant as the present application. In this heat exchanger, the flow paths for flowing the two media are formed by nested members manufactured by pressure casting, and the height thereof reaches greater than the total height of the nested members.

[Problem to be solved by the invention] In order to perform effective heat exchange, it is advantageous for the heat transfer path to be short, so the walls of the flow path are as thin as possible, and the width of the flow path, that is, the distance between adjacent walls. must be made as small as possible. The heat exchanger according to the above-mentioned application has a major drawback in that, in order to meet this requirement, it is extremely difficult to manufacture the nested member, and even if it can be manufactured, the cost is not appropriate. This disadvantage is due to the fact that the ratio of the wall height to the wall thickness or wall spacing becomes very large and, as a result, the casting distance of the casting material and the forming and removing distance when removing it from the mold become very long. ing. During the casting process, the mold tends to be insufficiently filled, resulting in poor production yields. Long demolding distances require the application of large forces to be removed from the mold, which creates a risk of breakage of the thin-walled casting parts and, as a result, reduces yield.

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a heat exchanger of the type mentioned in the introduction, which has especially excellent properties in terms of casting technology, and which also ensures efficient heat exchange between both media. The object of the present invention is to provide a method that can be applied to various fields in a simple manner.

[Means for Solving the Problems] In order to solve the above problems, in the heat exchanger according to the present invention, the nesting member forms a flow path for both the media in the form of a substantially tall and narrow chamber. It consists of a series of walls that extend in a meandering manner, with one medium and the other of the two media flowing alternately into adjacent chambers; A common intermediate wall, which is divided horizontally and is integral with the wall arrangement, divides it into two plane-arranged sub-chambers through which water flows in sequence.

[Operations/Effects] The structure of the nesting member as described above has the advantage that the forming distance and the casting distance for the casting metal that forms the wall of the nesting member, such as aluminum or aluminum alloy, are shortened. In particular, the intermediate wall, which is formed integrally with the wall arrangement, can be used in the mold as a central pouring channel for the casting metal that is poured into the mold. This reduces the casting path of the cast metal to half the length of other similarly sized nesting members, eliminating manufacturing problems.

In order to direct the medium flowing through the sub-chambers in sequence from one sub-chamber to the next in the simplest and cheapest possible way, in a further preferred embodiment of the invention at least both media A flow opening is formed in the chamber for one of the media by opening the intermediate wall from the end of the chamber. Since only a small portion of the intermediate wall needs to be modified for this flow opening, this does not result in any disadvantages regarding the casting technique for producing the insert.

In order to ensure the simplest possible construction and an efficient heat exchange between the media, in a further preferred embodiment of the invention, each inlet and outlet for both media is connected to a distribution channel or a collection channel, respectively. It is connected via channels to the lateral ends of the sub-chambers of one plane. This makes it possible to divide the two media into a plurality of sub-chambers, in which a substantial heat exchange takes place, and to merge the streams flowing through these sub-chambers. This flow direction has the advantage that no true counterflow of the two media occurs.

A further possibility for ensuring effective heat exchange consists in lengthening the flow path of at least one of the two media. In order to achieve this, in a further advantageous embodiment of the invention, the sub-chambers for one of the two media are each provided with an inlet or an outlet by means of a separating wall extending parallel to the intermediate wall. It is divided into partial chambers arranged on four planes with the communication port on the opposite side of the outlet open. Compared to the conventional method, the residence time in the heat exchanger is approximately twice as long for the same inflow amount of the medium, and the inflow amount is approximately twice as long for the same residence time.

In a further preferred embodiment of the invention, the two central planar sub-chambers are each fluidly connected through an entry channel arranged outside the telescoping member. When a heat exchanger has such a structure, there is an advantage that there is no need to make any changes to the main component, that is, the nested member. The modifications are limited to the subsequent assembly of additional separation walls and the provision of external inlet channels. The implementation of this configuration, which is particularly advantageous and convenient in terms of production, is characterized by the supply inlet, the distribution channel, the inlet channel, the collection channel and the exhaust channel for the medium flowing through the sub-chambers which are arranged in four planes. This is made possible by integrally forming the outlet within the lid. Furthermore, an additional separating wall can also be formed integrally with the lid, in which case the lid is also manufactured by pressure casting.

It is also advantageous for the further medium flowing through the heat exchanger to have its inlet, distribution channel, collection channel and outlet integrated in the bottom wall of the housing. This makes it possible to adapt only the bottom wall of the housing accordingly for different applications in which the locations of the inlet and outlet of the heat exchanger are different.
There is no need to change the nesting members. This opens up a flexible use of this heat exchanger for many application fields.

Finally, further preferred embodiments of the present invention that are highly adaptable to various characteristics of media will be described. In this embodiment, a serpentine wall-like serpentine bend is formed short in the region of the distribution channel and the collection channel for at least one of the two media, and the two adjacent each unshortened serpentine bend having an end disposed at a distance from the end wall of the shortened serpentine bend and integrally formed with the wall and at the same time defining a distribution channel or a collection channel; The end portions are connected via a separating wall, creating a space for the inlet of the distribution channel and the outlet of the collection channel. This allows the flow path within the heat exchanger for either or both media to be significantly lengthened.

Which of the possible embodiments of this heat exchanger is used for a particular application depends on various factors, such as the required inflow rate, the thermal conductivity of the medium, and the viscosity of the medium. It can be decided. Because of the good manufacturability of this casting technique and its flexible adaptability, this heat exchanger has many applications.

[Example] The example illustrated in FIG. 1 of this heat exchanger is as follows:
For example, it is a water-oil heat exchanger used in a water-cooled engine. As shown in FIG. 1, the heat exchanger 1 essentially consists of a housing 2, a telescoping member 3 inserted into the housing 2, and a lid 4 for closing the housing 2. The housing 2 has a bottom wall 21 and four side walls, two of which 27, 29 are visible in the sectional view of FIG. Here, the bottom wall 21 is understood to be the surface of the housing 2 facing away from the lid 4,
This does not fix the position of the heat exchanger in the mounting space. The location of the heat exchanger is rather completely arbitrary and is simply adapted to the given spatial conditions.

The nesting member 3 is formed of a wall row 30 arranged substantially in a meandering manner, and the wall row 30 includes longitudinal walls 31 extending parallel to each other and the longitudinal walls 31
end walls 32, 32' alternately connected at their end faces;
It consists of As a result, two medium chambers are created in each case alternately between the walls, one medium here being oil (in the figure, O¨l
For example, the chambers 51 to 5 are for
3. Other medium Here, for example, the chamber 61 is used as a medium for water (indicated by W in the figure).

On the side of the bottom wall 21, one of the meandering parts of the wall row 30 is formed short, that is, the end wall 32' is retracted from the adjacent end wall 32'.
At the same time, adjacent end walls 32' are connected to each other via end separation walls 33. This end separation wall 33
together with the bottom wall 21 of the housing 2, the supply port 22
defines a distribution channel 23 for oil flowing from the engine, for example, and a collection channel 24 for oil, from which the oil exits through an outlet (not shown). . A portion of the oil that has flowed in flows from the distribution channel 23 through the inlet 56 and reaches the chamber where heat exchange is performed. This container is shown in Figures 3 to 5 regarding its structure.
This will be explained in detail using figures. After passing through the reservoir, the oil likewise reaches the distribution channel 24 through an outlet arranged in the end partition 33 and, as already mentioned, from the collection channel 24 through an outlet (not shown). flows to

On the opposite side of the nesting element 3, i.e. in the area of the lid 4, a distribution channel 43 for the water is discernible;
From here, the water is diverted to a water chamber 61. The structure of the chamber 61 through which water flows will be explained in detail later using FIG.

FIG. 2 shows a front view of the nesting member 3 of the heat exchanger with the lid 4 removed, and in particular the arrangement of the chambers for both media in two planes can be seen clearly. Both planes are separated from each other by an intermediate wall 34, which is connected to the longitudinal wall 3.
1 and extends parallel to a serpentine wall-like end wall 32. By means of the intermediate wall 34, the original height of the container is halved and a partial container arranged in two planes is created. In this drawing, the upper plane corresponds to the chambers 51 to 53, and the lower plane corresponds to the chambers 51' to 53'. The chamber through which oil is flushed is closed on the lid side, and the chamber through which water is flushed is closed on the lid side. It's open. The water chamber is each further divided into two partial chambers, the partial chambers in the upper plane being given the reference numbers 61 and 61', and the partial chamber in the lower plane having the reference number 61''. and 61.As will be explained in more detail with reference to FIG.
1' and 61'' and 61, which are preferably formed integrally with the lid 4. For this reason, the second In the figure, the separating walls 47, 47' are no longer visible since the lid 4 has been removed.

Furthermore, in FIG. 2 one can see an edge 35 surrounding the telescoping element 3, at which point it abuts the upper edge of the housing 2 with the side walls 26-29. Four screw holes 81 are arranged around the housing 2 and the edge 35, and screws are inserted into the lid 4 and the nesting member 3.
and housing 2 are tightened to connect them to each other.

3 to 5 show a group of longitudinal sections of the heat exchanger 1, each cut along an adjacent oil chamber. In other words, the cross section shown in Figure 3 was cut along the - line in Figure 1, and the cross section shown in Figure 4 was cut along the - line in Figure 1. , the cross section shown in FIG. 5 is taken along the - line in FIG.

FIG. 3 is similar to FIGS. 4 and 5, but shows a heat exchanger housing 2 with side walls 26 and 28.
and a nesting member 3 having an edge 35 around it.
and a lid 4 that closes the housing 2 and sandwiches the nesting member 3 between itself and the housing 2.
It shows. The lid 4 has water channels 43 and 46.
and 44 are recognized, the functions of which will be discussed in detail later. One longitudinal wall 31 is discernible in the nesting member 3. An intermediate wall 34 extends at right angles to the longitudinal wall 31 in its central part, so that an oil chamber 51 is formed in the upper plane and an oil chamber 5 is formed in the lower plane.
1' is born.

Next, referring to FIG. 3 and FIGS. 4 and 5, the oil flow path in the heat exchanger will be explained as an example. As seen in the lower right portion of FIG. 3, the oil first reaches the chamber 51' on the lower plane from the supply port 22 through the distribution channel 23 and the inlet 56. After flowing through this, the oil reaches the chamber 51 located above it through the flow opening 54. From there, the oil flows through the inlet 55 to the next oil reservoir located at the rear in FIG. 3. Collection channel 5
4 cannot occur due to the end partition wall 33.

FIG. 4 also shows the oil flow path within the heat exchanger. After leaving the upper planar chamber through the inlet (FIG. 3), the oil reaches the upper planar chamber 52, which is arranged parallel to the chamber 51. After flowing through this chamber 52, the oil reaches again through the flow opening 54 into a chamber 52' which is arranged below the chamber 52 in the lower plane. The oil leaves this chamber through an inlet 55' located at the bottom end of the chamber 52' and separated from the oil distribution channel 23 by an end separating wall 33. .

As is clear from FIG. 5, the oil entering from the inlet 55' reaches the chamber 53' on the lower plane.
After flowing through this, the oil reaches again through the flow opening 54 into the chamber 53, which is arranged above the chamber 53'. After penetrating there, the oil finally reaches the collection channel 24 through the outlet 57 and from there flows out to the outlet, for example to the engine oil pan.

As is clear from Figures 3 to 5, the length of the oil flow path is approximately six times the length of a single oil chamber in this embodiment, ensuring strong heat exchange. Ru.

It is further clear from FIG. 5 that the housing 2, the nesting member 3, and the lid 4 are connected by a screw 82 that passes through the lid 4 and the nesting member 3 and is screwed into the screw hole of the housing 2. It is being made more difficult.

Figure 6 shows the first section parallel to the cross sections of Figures 3 to 5.
It shows a cross section of the heat exchanger along the - line in the figure, and this time the cross section is the structure of the chamber through which water flows. As shown in FIG. 6, a series of four partial chambers 61, 61',
61'', 61 through which the water flows. The central dividing wall is the already mentioned intermediate wall 34, which is formed integrally with the nesting element 3 and also extends into the oil reservoir. Separation walls 47, 47' are arranged on both sides of the lid 4 and are integrally formed with the lid 4.
2 first reaches the distribution channel 43. From here, the water is diverted to the water-flowing chamber, with a portion of the water flowing into the sub-volume 61 shown in FIG. After passing therethrough, the water passes through the flow opening 64 at the end of the chamber 61 opposite the lid and reaches the next chamber 61' located below. From this chamber the water flows through a transition channel 46 integrally formed in the lid into the next chamber 61'' which again follows it and from there through a flow opening 64' into the lowest chamber 61.
flows within. From there the water flows via collection channel 44 to outlet 45 . Container chamber 61, 61', 6
1'', 61 are separated from the distribution channel 23 and collection channel 24 for oil by an end wall 32', respectively, at their ends opposite the lid.

As is clear from the previous figures, the only sealing point that can be created when assembling the individual parts is located at the surrounding edge 35 of the nesting part 3, so that oil and water in the heat exchanger 1 No mixing occurs. Oil and water are always separated from each other in the nesting element 3 or the housing 2 by a continuous wall. Sealing at the circumferential edge 35 of the nesting element 3 can be effected effectively by means of elastic sealing rings 83 and 83'. If a sealing failure occurs at this location, the medium will only flow out to the outside of the housing 2, and will not enter the channel through which other media are flowing. This ensures that mixing of both media and possible disadvantages associated therewith are avoided.

As is clear from Figures 1, 3, 4, and 5, in this embodiment of the heat exchanger, the wall that partitions the chamber through which the oil flows has ribs that protrude in a direction crossing the oil flow direction. 7 are arranged.
This creates a swirling flow in the flowing oil, which helps in strong heat exchange and transport within the flowing oil. Due to the good heat exchange, the formation of disadvantageous temperature gradients in the flowing oil is also reliably avoided.

Besides the structure of three groups of oil chambers connected in parallel as in the illustrated embodiment, the heat exchanger according to the invention can also be constructed with even more oil chambers within the framework of the invention. can. In its use, the heat exchanger according to the invention can also be used as a separate component or in combination with other components, such as oil filters of internal combustion engines.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the heat exchanger according to the present invention, and FIG. 1 is a horizontal sectional view of the heat exchanger, FIG. 2 is a front view of the heat exchanger according to FIG. 1 with the lid removed, and FIG. The figure is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 1.
Figure 5 is a sectional view taken along the - line in Figure 1;
The figure is a sectional view taken along the - line in FIG. 1. 1... Heat exchanger, 2... Housing, 3... Nesting member, 30... Wall level, 51-53, 51'
~53', 61~61...Container room.

Claims (1)

[Scope of Claims] 1. A heat exchanger for two fluidized media such as liquids, which is provided with a supply port and a discharge port for both media, and which exchanges heat with a housing closed with a lid. and a nesting member for causing the medium to flow separately, and at least the nesting member is manufactured as a pressure cast article, the nesting member 3
are high and narrow chambers 51-53, 51'-53'; 61
adjoining chambers 51-53, 51'-53' substantially consisting of a serpentine wall 30 forming a flow path for both media in the form of 61;
61-61, one medium and the other of the two mediums flow alternately, and the chambers 51-53, 51'-53'; 61-6
1 is for all chambers 51 to 53, 5, respectively.
1' to 53'; 61 to 61 are divided in the height direction and arranged in two planes through which water flows in order by a common intermediate wall 34 that is provided integrally with the wall row 30. Partial chambers 51-53,5
Heat exchanger for two fluid media, characterized in that they are divided into 1'-53'; 61-61. 2. In at least one of the medium chambers 51 to 53, 51' to 53', the intermediate wall 34 is open from the end of the chamber 51 to 53, 51' to 53'. 2. Heat exchanger for two fluid media according to claim 1, characterized in that a flow opening 54 is formed for creating a flow. 3. Each inlet 22; 42 and outlet 25; 45 for both media is connected via a distribution channel 23; 43 or a collecting channel 24; 51'~53', 61
3. Heat exchanger for two fluid media according to claim 1, characterized in that the heat exchanger is connected to the ends of the fluid media. 4 Partial chamber 61 for one of the two media,
61′; 61″, 61 are the intermediate walls 34, respectively.
partial chambers 61 arranged in four planes, with flow ports 64, 64' on the side opposite to the supply or discharge ports open by separating walls 47, 47' extending parallel to the partition walls 47, 47'; Claim 1 characterized in that it is divided into 61', 61'', and 61.
Heat exchanger for two fluid media according to any one of paragraphs 1 to 3. 5. The two central planar partial chambers 61', 6
1'' are fluidly connected to each other through an intrusion channel 46 disposed outside the nesting member 3, as set forth in claim 4.
Heat exchanger for two fluid media. 6 Partial chambers 61 arranged on four planes,
It is characterized in that the supply opening 42, the distribution channel 43, the inlet channel 46, the collection channel 44 and the outlet 45 for the medium flowing through 61', 61'', 61 are integrally formed in the lid 4. Heat exchanger for two fluid media according to claim 4 or claim 5. 7. Partial chambers 51-- arranged in two planes.
Inlet 22, distribution channel 23, collection channel 24 and outlet 2 for the medium flowing through 53, 51' to 53'
7. A heat exchanger for two fluid media according to claim 1, characterized in that 5 is integrally formed in the bottom wall 21 of the housing 2. 8. One serpentine bend of the serpentine wall arrangement 30 is formed short in the region of the distribution channel 23 and the collection channel 24 for at least one of the two media, and A non-shortened serpentine bend, each having an end disposed at a distance from the end wall 32' of said shortened serpentine bend and formed integrally with the wall 30, at the same time has a distribution channel 23 or Claims characterized in that they are connected via an end separation wall 33 that delimits the collection channel 24 and creates a space for an inlet 56 of the distribution channel 23 and an outlet 57 of the collection channel 24. Heat exchanger for two fluid media according to any one of clauses 1 to 7.