FI76209B - VAERMEVAEXLARE AV PLANA PLAOTELEMENT. - Google Patents

Description

t 76209

Slat changer made of flat plate elements

The invention relates to a heat exchanger provided with heat exchanger surfaces formed of planar plate elements and intended in particular for heat exchange between two perpendicularly flowing media with very high flow rates, the two heat exchanger surfaces separating the two media being arranged at a short distance from each other. a parallel connection plane formed by bending upwards two opposite edge regions of the planar plate element.

Several such heat exchangers are known in the art. Examples are a heat exchanger according to DE-A-2 706 003 with specially formed, perforated and three-part plates, a heat exchanger according to DE-A-2 028 996 with plates and special seals between the plates, DE-A-2 634 476 heat exchanger with side-by-side profile units, boiler heat exchanger element according to DE application 2 332 047 made of hollow plates with ribs, heat exchanger according to FR patent publication 998 449 made of sloping plate channels with oblique flow channels A lamellar radiator according to 434 787 with zigzag channels. However, the state of the art is based on DE-application 2,226,056 and U.S. patent 3,454,082.

DE-A-2 226 056 describes a condenser, in particular for household appliances for drying laundry, which consists of a plurality of layers arranged close to one another at a short distance and forming heat exchanger surfaces between the cooling medium and the moist air stream. The layers preferably consist of metal foils which are tightened, glued or welded, for example, between the sealing edges of the frame. The layers 2,7209 may also be placed in individual "small frames" which are then assembled into a common frame.

U.S. Patent 3,454,082 discloses a valve-controlled mixer having a heat exchanger, the heat exchanger being divided into two chambers. The chambers are separated by several plates formed identically and stacked on top of each other 90 °, whereby the thermal conductivity of the plates is higher than that of the flowing media.

The plates are thus made of metal and the heat exchanger is operated with a liquid.

As with these known solutions, most heat exchangers with plates have most difficulties from three sources: the material of the plates, the required strength of the whole structure - and especially the connection between the plates and the frame structure required for them, sealing.

The plates are most often made of metal, which has very good thermal conductivity, sufficient strength and can be joined together easily. However, structures made of metal are mostly heavy and sturdy, however, primarily metal plates are damaged relatively quickly due to corrosion. In addition, the metals used in heat exchangers are expensive and the manufacturing technology is also complex and expensive.

Until now, the production of sheets from plastic has mostly been mentioned only as a theoretical possibility. According to current technology, these sheets are made relatively thick to ensure the required strength. Thus, however, the thermal conductivity of the sheets is substantially impaired. The connection and sealing problems and the issue of the frame structure have also not been solved for the heat exchanger made of these plates.

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The basis of Keke's enthusiasm is to provide a flat plate element consisting of a plate plate element which, in addition to eliminating the disadvantages of the known solutions, allows a simple, economical, fast and large-scale structure and allows the flow channels to be fixedly connected, sealed and separated at the heat exchanger angles.

To solve this problem, the invention proposes a heat exchanger in which points are arranged in the edge regions of the planar plate elements to strengthen the connections between two adjacent planar plate elements.

The greatest significance of this task can be seen in the fact that the heat exchanger can be erected without other elements, no seals, spacers, compression devices or the like are required. The flat plate elements can be stacked on top of each other 90 in turn and connected, whereby the connection plane of the second flat plate element can be connected to the base plane of the flat plate element on top of it. The flat plate elements are usually fastened to each other by a non-removable connection, gluing, welding or the like.

The flat plate elements can be provided with point-like thickenings made of their material, whereby the height of the connection plane and the thickenings with respect to the base plane are equal. At the same time, this height is the height of the flow channel, which is relatively small because the heat exchanger surfaces are arranged at a small distance next to each other. This measure gives sufficient strength to the structure even when the flat plate elements are very thin.

In the corner areas of the flat plate elements, the contact surface of the adjacent flat plate elements is enlarged to ensure a secure connection and sealing. These points 4 76209 are formed on each flat plate element in the connection plane diagonally symmetrically, and specifically, from the connection plane, a protrusion is formed in the corner area and in the adjacent corner areas a protrusion in the form of a protrusion is formed on this flat plate element.

In addition, the corner areas can be attached to the corner profile, which is preferably formed by casting.

Other details of the invention will be explained in more detail below by means of an exemplary embodiment with reference to the accompanying drawing. In the drawing, Fig. 1 shows a schematic perspective view of an embodiment of a heat exchanger according to the invention, Fig. 2 shows a plan view of the planar plate element of Fig. 1, Fig. 3 shows a sectional view along the line III-III in Fig. 2, Figs. Fig. 6 shows a sectional view along the line IV-IV in Fig. 2.

Fig. 1 shows an embodiment of a heat exchanger according to the invention, in which the flat plate elements 1 are stacked on top of each other and provided with corner profiles 2. The corner profiles 2 have a T-profile, as a result of which several units shown in Fig. 1 can be connected in series and / or side by side. channel. Of course, several planar plate elements 1 can be stacked on top of each other, as a result of which the heat exchanger can be arbitrarily enlarged in all three directions of the space.

The heat exchanger is assembled from identical flat plate elements shown in Figure 2. The starting material of each flat plate element 1 is a flat plate formed by pressing, casting or the like in the shape shown in Figs. 2-6. When the level of the initial plane plate is considered as the base plane 3, 5 76209, a plane formed according to the manufacturing points and parallel to the base plane 3 can be called the connection plane 4. The connection plane 4 is manufactured by "extension" from the base plane Thus, where there is a connection plane 4, there is no base plane 3 below it and, conversely, there is no connection plane 4 above the base plane 3. The continuity of the material of the plane plate element 1 is not interrupted in this case.

The base plane 3 of the flat plate element 1 is provided with thickenings 5, which are also formed of the material of the flat plate element 1. They have the same height as connection level 4 with respect to basic level 3.

Fig. 3 shows a sectional view along the line III-III in Fig. 2, whereby the sectional plane also passes through 5 rows of thickenings. Of course, the thickenings 5 cannot be arranged only in as beautiful an order as in the figures and not only in that number. They can have, for example, a random order, as a result of which the turbulence of the medium flowing in the flow channel formed by the flat plate elements 1 can be increased.

Figures 4 and 5 show two side views of directions perpendicular to each other. It can be seen from these that when the base level 3 of the next level plate element 1 is placed next to the connection level 4, a flow channel closed from the direction of Fig. 5 is formed when viewed from the direction of Fig. 4.

Fig. 6 shows a section passing through the connecting plane 4 formed in the edge regions of the flat plate element 1, as shown in Fig. 2 by lines VI-VI. It can be seen from the sectional views and the side views that the planar plate element 1 is formed in one piece, and that the base plane 3 and the connection plane 4 move continuously to each other.

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As can be further seen from the figures, in particular from Figure 2, each flat plate element is provided with reinforcement points at its corners for a more secure sealing in the corner areas. These reinforcement points are formed diagonally symmetrically and specifically in the connection plane 4 in the form of a protrusion 6 in one edge region and in the form of a recess 7 in the adjacent edge regions. The recess 7 has the same shape as the protrusion 6. Thus, at the protrusion 6, the connection plane 4 is increased and at the recess 7, the base plane 3 is increased. . This considerably increases the contact surface and thus the sealing capacity in the corner areas of the forging plate elements 1.

In the operation of the heat exchanger according to the invention made of flat plate elements 1, a second medium is discharged from the second direction (arrow A) and a second medium from a direction perpendicular to the first direction (arrow B) into the flow channels. The channels and thus the media are separated from each other by flat plate elements 1.

The flat plate elements 1 can also be made of plastic, e.g. PVC, in which case they can be thin enough to have sufficient thermal conductivity. This results in significant advantages: simple and lightweight construction, low manufacturing costs, absolute maintenance-free, substantially perfect resistance to corrosive substances and high service life.

Claims (6)

A heat exchanger provided with heat exchanger surfaces formed of flat disc elements, and which is specifically intended for heat exchange between two perpendicular to each other flowing media containing extremely large throughput quantities, the heat exchanger surfaces being apart of the two media separating these two media one another, and a base surface <3> and one in relation to this parallel connecting surface (4), which is formed by bending up the two opposing edge regions of the flat disk element (1), is provided in the flat surface elements (1), characterized in that the locations (6, 7> for reinforcing the joint slopes between two adjacent flat disk elements <1) are arranged in the edge regions of the flat blade elements (1). Heat exchanger according to claim 1, characterized in that the reinforcing points are formed diagonally symmetrically in the flat disc elements, in which a projection <6> is formed in a corner area and in a nearby corner area (6) one with a projection (6). ) uniform groove <7>. Heat exchanger according to claim 1 or 2, characterized in that the flat disc elements (1) are provided with dot-shaped thicknesses <5> formed of the material of the disc elements. Heat exchanger according to claim 3, characterized in that the thicknesses <5) and the connection surface <4> have the same height measured from the base surface <3>.