DE102013104583A1 - Heat exchanger for installation in confined spaces - Google Patents

Abstract

The invention relates to a frame ventilation device. It contains a plate heat exchanger with no more than three different types of plates (A, B, C), which are stacked on top of one another and connected to one another to form two separate flow paths, with two types of plates (A, B) in the plate stack. the same number of pieces is available and the third type of panel (C) is only present once in the panel stack as the end panel (3).

Description

State of the art:

In order to build the most effective heat exchanger with minimal space requirements, the construction as a cross-countercurrent heat exchanger makes the most sense. In this case, adjacent plates are flowed through by different fluids. This allows the heat transfer from one fluid to another over a very large area.

Out DE 198 53 526 A1 the method for producing a plastic heat exchanger is known. The production of heat exchanger blanks made of plastic has above all the advantage of very high efficiency. The disadvantages of plastic in heat transfer (low thermal conductivity) can be minimized by selecting very thin output plates. By thermoforming the wall thicknesses are then reduced again, which benefits the efficiency. There are usually two different plates, which are constructed in mirror image and which are inserted into one another during assembly. This results in an internal sealing of the plates against each other.

Task:

Manufacture of a heat exchanger with minimal space requirements and a high degree of heat provision to ensure controlled indoor ventilation for individual rooms. For this purpose, it should be possible to install the heat exchanger together with fans and air-conducting elements in, for example, a window profile.

Solution:

The heat exchanger is made of stacked preferably made by thermoforming plastic sheets. The deep-drawing process greatly reduces the wall thickness inside the channels, resulting in significantly improved heat transfer. The plates form so profiled plates.

Preferably, the heat exchanger (including heat exchanger) is constructed for a countercurrent principle, since then the efficiency is higher. However, it is also possible to train and use it in the DC principle.

The profiled plates and air-conducting elements are arranged so that they realize the desired support between each other as well as the air flow and associated two (physically separate) flow paths with the alternating stacking.

The plates are preferably welded or glued together, so that the individual plates are sealed against each other.

The use of a differently designed end plate 3 reduces the overall height of the heat exchanger compared to the standard design. With the same space can accommodate more plates and thus a higher efficiency can be achieved.

Examples illustrate the invention.

The one end plate 3 is designed so that the increase in the side surface 5 is not pronounced, so that the excess a (detail B view) is omitted in the total height of the heat exchanger.

With small overall dimensions and tight space conditions, a decisive improvement in the efficiency and the permeated volume flow can be achieved.

In addition, it is possible to construct the heat exchanger completely symmetrical, so that both flow paths have the same number of free openings, as this an odd number of plates is necessary: z. 10 × plate A (reference 1), 10 × plate B (reference 2), and 1 × plate C (reference 3).

An odd number would in the prior art mean that one plate more is required of the type A or B of plates, which leads to problems in rational production (eg 10 × plate A, 11 × plate B), since the Plates are usually made together and then stacked the same.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19853526 A1 [0002]

Claims (5)

Plate heat exchangers comprising no more than three different types of plates (A, B, C) stacked on top of each other and joined together to form two separate flow paths, the same number of plates in the plate stack of two plate types (A, B) is present and the third type of plate (C) only once in the plate stack as the end plate ( 3 ) is available. Plate heat exchanger according to claim 1, with an elimination of an increase ( 5 ) in the third plate type, so that the oversize (a) in the total height of the exchanger is eliminated. Plate heat exchanger according to claim 1, with the formation of two separate, countercurrent flow paths. Plate heat exchanger according to claim 1, wherein the heat exchanger is made of stacked, produced by thermoforming plastic plates. Plate heat exchanger according to claim 4, wherein the stacked plastic plates ( 1 . 2 . 3 ) are formed profiled.

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