FI64459C - PLATTVAERMEVAEXLARE - Google Patents

Description

L.mJT] Γβ, ADVERTISING PUBLICATION [b] (11) utläggningsskrift 644 5 9 C (45) Pc.i * n'.M t: y 13 11 1333 ^^ (51) Ky.i «u ^ nt.a .3 F 28 D 9/00, F 28 F 3/00 ENGLISH —Fl N LAN D (21) P «* nttlh * l« mu »- Pw * ntw» eknlnl 762505 (22) H »k * ml * pitvt - Anaeknlnpdtf 01.09.76 (Fl) (13) Alkupilvt — Glltlghetadag 01.09.76 (41) Tullut lulklMkii - Blhrlt off «ntll | 03/03/77

Patent and Raklstarlhallltue (44) Nihttvikilpwon ja kuL) ulk * i * un pvm. - 0 o

Patent · och registerstyreltan An * 6kan uttefd och utUkrKten pubttccrad 29.07.o3 (32) (33) (31) Requested front —Bugird prlorftet 02.09-75

Sweden-Sweden (SE) 7509716-2 (71) Parca Norrahajmmar AB, Fack, 56200 Norrahammar, Sweden-Sweden (SE) (72) Göran Järvstrat, Linköping, Sweden-Sweden (SE) ilb) Yrjänä Vuori (51 *) Record heat exchanger - PlattvärmeväLxlare

The present invention relates to a heat exchanger with elements, which elements can be easily adapted to different flow rates or pressure differences between two substances on different sides of the plate.

Among the previously known conventional plate heat exchangers is a type in which sealing rings are mounted on an overflow opening passing through the plates alternately in spaces between plates assembled into a plate package, the plates being in the form of rectangular overflow openings in and out of such spaces. The plates are usually provided with wavy patterns or the like to increase heat transfer or stiffen the plates due to the gravitational forces acting on the plates due to the pressure of the materials. The spaces of these substances between the plates can be connected in series one after the other or in parallel. A price connection, i.e. a bypass connection, as a result of which part of the flow bypasses the heat exchanger, must be undertaken when the flow rates of the substances are different, 64459, but this is hampered by a decreasing degree of effect.

It is an object of the present invention to provide a heat exchanger in which the effective flow paths of the two substances can be made different and the substance flows countercurrent to each other. Thus, the amount of heat transferred can be optimized with the most suitable pressure drop. This is achieved according to the invention by a redistribution of the flow paths of the substances, using internal short circuits in the form of numerous overflow openings. In practice, this can be done by conducting the substances in helices from the center of the plate to the edges or vice versa, preferably so that the substances act countercurrently. The application to flow / pressure drop is accomplished by reducing or increasing the theoretical total flow distance by increasing or decreasing the rise of the flow coil. In practice, this is possible by locally shorting more or less the turns of the actual helical channel at the openings between adjacent turns. By shaping the plates so that there are different numbers of these overflow openings or that they are different in size on each side of the same plate, the above-mentioned optimization is achieved.

The heat exchanger with which the object of the invention is achieved must be manufactured in accordance with the characterizing part of claim 1. An example of the implementation of a heat exchanger according to the invention will now be described with reference to the accompanying drawings, which show in Fig. 1 a horizontal projection of a plate belonging to the exchanger, in Fig. 2 an exploded view of several stacked plates; to section AA, in Fig. 4a to section BB in Fig. 3 »at right angles to section AA, in Fig. 4b the same section as in Fig. 4a but with a different angle between the plates, in Fig. 4 the same section as in Fig. 4b but with a different angle between the plates again of plates placed on top of each other in the heat exchanger at different mutual placement angles.

In the embodiment described below, the main parts are the plates according to Figure 1, which are made of a thermally conductive neutral material, for example stainless steel. the plates are compressed and printed in the shape shown in the figures, i.e. a plurality of concentric ridges 1 form protrusions 2 or correspondingly depressions 3 on the surface of the plate which is flat between the ridges and forms a plurality of concentric flow channels between the ridges. The channels are connected in a spiral with intermittent rises, i. the channel changes from the outer to the inner flow path or vice versa via holes 4 and reorienting ridges 5 arranged therein, connecting two adjacent concentric ridges. There are a couple of holes 6, 7 in the center of the plates and a couple of holes 8.9 on the sides. Two of these holes, 6, 8 formed on the other side of the helical channel or the beginning respectively at the end, and the remaining two holes, 7,9 plate on the other side of the channel beginning and the end plate. Figure 1 shows the top side the channel is indicated by full arrows and dashed arrows underside of the channel.

In addition to the holes 4, there are a row of cavities or notches 10 in the ridge. These are intended to create overflow points between adjacent channels, which can be used to achieve a number of different helical transformations on the same plate. When the plates are placed on top of each other so that the notches of two adjacent plates face each other, such an overflow point 11 is created. The area of the overflow point can be varied by rotating the plate relative to the other plate; as a result, the overflow may also not occur at all, i. the ridge of the second plate covers the notch of the second plate. Figure 4a shows a tangential section B-B including two overflow locations 11 in their full extent. Figure 4b shows the same section in which the lower of the plates shown is twisted at an angle equal to the division between the two notches 10a, 10b. As a result, two notches are covered, one in each plate, the two remaining form an overflow location 11. In Fig. 4c, the lower plate is twisted at an angle equal to half of the division between the notches 10, which covers all the notches. A number of constructive alternatives are conceivable, eg. Different number of notches on both sides of the plate, or slots offset at different angles on both sides of the plate, the notches of different sizes etc. The other ingredients can be arranged ylivirtauskohtia 4a of the first image and the other not, as shown in Figure 4c shows. A part of the stack having such a transition pattern is shown in Fig. 5 », in which section B-B is thus extended to several plate turns in the stack.

For example, in the case of a plug hot water exchanger, one or more additional collecting ducts 12 may be suitable, for example for the purpose of increasing the primary water return from the radiator or the like. These additional channels divide the plate into a preheater and a reheat section.

i 4 64459

The plates may conveniently be provided with a button 13 of the flow channels in the control plates against each other, so that each side plate can be maintained by a different pressure. At the edges and at the collecting channels, the plates are sealed against each other by packages 14.

The implementation of the heat exchanger presented and described herein is an example of how the invention can be implemented. Apart from the mentioned combinations, there are, of course, others in which one substance has zero, one or two overflow points and the other two, one or none. Instead of the addition in the additional collecting channel 12, emptying can of course also be arranged through it.

Claims (5)

5 64459 A plate heat exchanger comprising heat Conductive, stacked plates, wherein the plates are compressed and / or printed into a shape comprising helix-shaped ridges, (1) forming depositions or protrusions, respectively. there are flow channels in which the different turns are continuously alternating and whose ends are connected to the connecting channels (8), which are at right angles to the planes of the plates, and that the protrusions (2) on the opposite side surfaces of the two adjacent plates are facing each other. that the overflow points (11) between the two flow channels separated by the at least one protrusion are arranged intermittently or notches (10) in the protrusions or ridges of the second plate, which have been brought into full or partial coincidence with the corresponding breaks in the protrusions or ridges of the second plate ai with notches. Plate heat exchanger according to claim 1, characterized in that the ridges on each side surface comprise concentric circular ridges, the different turns of which are connected to each other by means of special outlet ridges (5) and openings (4) in the direction of the ridge, and that the overflow point area is adjusted by rotating one plate at a certain angle to the other. 3. A plate heat exchanger according to claim 1 and claim 2, characterized in that the heat exchange medium is passed from the stack one arbitrarily selected disc on the other side of the channels and the second medium is passed in countercurrent relation to said first plate on one side of the channels. 4. A plate heat exchanger as claimed in claim 2 according feel, characterized in that the depositions of each of the protrusions, as well as the lateral surface of the same side are interrupted or indentations. A plate heat exchanger according to claim 4, characterized in that the depositions of said side surface form protrusions on the second side surface at the protrusions of the nearest plate and form flow channels with them, the intermittent breaks or notches between them forming further overflow points.