DE4238191C2 - Permeable structures - Google Patents

Description

The invention relates to permeable structures made from cut Cards made of ceramic material, in particular for heat exchangers.

Permeable structures of the type mentioned are known from DE 40 22 654 A1 known. These structures have rows of holes running parallel to each other on, between which channels are arranged, which alternate with Webs are provided as cooling fins. The heat exchange takes place via this Ribs, which results in long journeys. The invention seeks to remedy this.

The invention solves the problem with a permeable structure is characterized in that the structure has channel systems that consist of parallel running channels and also parallel across the same level extending channels exist, the parallel channels in the region of the transverse channels have a height offset and with each other through mixing chambers are connected and the transverse channels are deflected by means of deflection channels and be offset in height. Instead of the deflection channels, too Mixing chambers are used in the channels. The channels can be in Connection channels begin or end.

At least one of the two channel systems can be divided into two separate channel systems be divided.

The advantages of the invention are essentially the fact that the Heat exchange predominantly over narrow, thin obstacles (short distances) he follows. In addition, the height offset of the channels in the Deflection channels or mixing chambers and collecting channels the flow profile redesigned (swirled), which additionally improves the heat transfer becomes.

In the following, the invention will be explained using only one embodiment illustrative drawings explained in more detail. It shows

Fig. 1 is a permeable structure as a two-way system in perspective and partly in section,

Fig. 2 shows a duct system according to FIG. 1 in perspective in an exploded view and

Fig. 3 shows the structure of FIG. 1 as a three-way system.

The permeable structure is made up of structured cards made of ceramic material. The structure can be created in the card by sawing, milling, turning, lasering, punching and liquid jet cutting. The individual cards are stacked on top of one another in a specific order, laminated and burned into a monolith. This creates parallel channels 1 and also parallel channels 2 running transversely on the same level. The channels 1 have a height offset 4 in the area of the channels 2 . The channels 1 of the different levels are interconnected by mixing chambers 3 . Channels 1 lying next to one another are separated by webs 6 . The channels 2 can begin in the connecting channel 5 and then run across the channels 1 via deflection channels or mixing chambers 7 to a connecting channel 8 , in which case either connecting channel 5 or connecting channel 8 can be used as an inlet or outlet. Alternatively, the channels 2 begin or end with a large collecting space or, as with the channels 1 in FIGS. 1 and 2, with a large number of individual channels. The deflection channels 7 connect the front and the rear part of the channel offset in height. If 7 mixing chambers are used instead of the deflection channels, mixing also takes place. Corresponding intermediate layers allow the duct system 1 and / or the duct system 2 to be divided into 2 separate duct systems (2-, 3- or 4-way system). Referring to FIG. 3, the channel system 2 into two separate channel systems 2 a and 2 b divided. 5 a, 5 b, 8 a, 8 b indicate the connecting channels and 7 a, 7 b the deflection channels.

Claims (3)

1. Permeable structure, made of cut cards made of ceramic, characterized in that the structure has channel systems which consist of parallel channels ( 1 ) and also parallel to them on the same plane parallel channels ( 2 ), the parallel channels ( 1 ) have a height offset ( 4 ) in the region of the transverse channels ( 2 ) and are connected to one another by mixing chambers ( 3 ) and the transverse channels ( 2 ) are deflected and offset by means of deflection channels or mixing chambers ( 7 ). 2. Permeable structure according to claim 1, characterized in that at least one of the two channel systems ( 1 , 2 ) is divided into two separate channel systems ( 2 a, 2 b). 3. Permeable structure according to claim 1 or 2, characterized in that the transverse channels ( 2 ) in connecting channels ( 5 , 8 ) begin or end.