DE112008001056T5 - Plate heat exchanger - Google Patents

Abstract

A plate heat exchanger (1) comprising a plate stack (2) having two end plates (3, 4) and a plurality of heat exchange plates (5) disposed between the end plates (3, 4), an end plate (3, 4) having a fixing device (6) extending outside of the plate stack (2), the plate heat exchanger (1) being further provided with passages (7) on the one end plate (3, 4) connecting the connections (10) to a location of attachment (10). 9) to which the plate heat exchanger (1) is to be fastened, characterized in that the longitudinal expansions (B) of the fastening device (6) relative to the longitudinal extent (A) of the remainder of the end plate (3, 4) and the And the fastening means (6) can be defined so that the longitudinal extensions (B) of the fastening device (6) parallel to the longitudinal extent (A) of the end plate (3, 4) and the plate stack (2) laughed when the plate heat exchanger (1) is attached to the fixing point (9), the deformation leading to an improved ...

Description

BACKGROUND OF THE INVENTION

The The present invention relates to a plate heat exchanger and in particular to an arrangement for the end plate of a Plate heat exchanger.

BACKGROUND OF THE INVENTION

Plate heat exchangers attached to hydro blocks or the like must have an end plate of high durability because the system pressure can be very high. As more and more plate heat exchangers are provided with fasteners located outside the heat exchanger, see for example the US Pat US-A1-2005 / 0121182 , the durability requirements are even higher. The pressure almost always causes the endplate and the heat exchangers to be raised or even disconnected from their attachment position, which can lead to leakage in the connection. In the fastening device, a bending moment is generated. Since the plates in these types of plate heat exchangers are hard or soft soldered together, all plates including the end plate are subjected to a heat treatment during the soldering process, causing the material of the end plate to partially lose its original cold formed durability.

The US-A1-2005 / 0121182 discloses a heat exchanger having a plurality of heat transfer plates stacked on top of one another to form alternating channels and a mounting plate mounted on one side to one side of the stacked plates and attached to a separate component on its opposite side ,

SUMMARY OF THE INVENTION

It is the object of the present invention, the above-mentioned To get around problems. More precisely, the goal is to have one To provide a plate heat exchanger, which is a frame plate that provides improved capabilities, the plate heat exchanger to attach to a hydro block or the like, wherein the frame plate is designed so that it has a high resistance has, so that prevents the plate heat exchanger or its frame plate during a high pressure load break, causing a leakage in the connection between the plate heat exchanger and the hydroblock or the like.

This The aim is achieved by the plate heat exchanger defined above achieved, which is characterized in that a longitudinal Extension of the fastening device with respect to the longitudinal Extension of the rest of the end plate of the plate stack deviates.

By doing the frame plate of the plate heat exchanger with a curved Fastening device is provided, their durability when attaching the end plate to the hydroblock or the like strengthened. The fastening device is when fastening bent so that the fastening device the surface of the hydroblock or the like. The bending of the Fastener generates tension or in some cases even a plastic or permanent deformation in the transition area between the fastening device and the stack of heat transfer plates. The deformation leads to work hardening at the site which is the most exposed to it, which provides stability and tension are raised so that the end plate at a Stress did not fail. This will make the seals or Seals between the endplate and the hydroblock in place held.

To Another aspect of the invention is the fastening device formed in the form of brackets extending from the end plate, wherein the attachment device asymmetrically on the short sides of End plate is arranged.

To A further aspect of the invention may be a fastening device be provided asymmetrically on each of the short sides of the end plate.

To Another aspect of the invention is the fastening device with holes for fixing the plate heat exchanger provided at a mounting location.

Further Aspects of the invention are defined in the dependent claims Are defined.

BRIEF DESCRIPTION OF THE DRAWINGS

in the The invention will now be described in more detail with reference to the appended drawings Drawings described.

1 discloses a schematic side view of a plate heat exchanger according to the invention;

2 discloses a schematic oblique view of a plate heat exchanger according to the invention;

3 discloses a schematic oblique View of a plate heat exchanger according to the invention and a mounting block;

4 discloses a partially detailed schematic oblique view of the plate heat exchanger according to the invention and the mounting block; and

5 discloses a partially detailed diagrammatic oblique view of the plate heat exchanger of the invention attached to a mounting block.

DETAILED DESCRIPTION OF THE EMBODIMENTS

1 - 5 disclose different views of a plate heat exchanger according to the invention. The plate heat exchanger 1 includes a number of heat transfer plates 5 , which are arranged side by side to a plate stack 2 to build. In 1 - 5 is the stack of heat transfer plates 5 shown in one piece to simplify the drawing. In fact, however, the stack comprises several heat transfer plates 5 , A frame plate 3 and a printing plate 4 are on the side of the heat transfer plates 5 arranged. In the embodiment shown, the frame plate 3 , all heat transfer plates 5 and a printing plate 4 permanently bonded together, for example by brazing, soldering, gluing, welding or any other suitable method of bonding. The frame plate 3 and the pressure plate 4 are used in the description of the invention as end plates 3 respectively. 4 designated.

Each heat exchange plate 5 includes in a well-known manner a corrugation or a pattern to promote the heat exchange. The pattern includes ridges and valleys, each with adjacent heat transfer plates 5 Locally abut each other, so that contact points are formed, in a well-known manner for connecting the heat exchange plates 5 each other during brazing or soldering of the plate heat exchanger 1 be used. Well-known flow channels are between each adjacent heat transfer plates 5 in a plate stack 2 provided a number of heat transfer plates 5 includes stacked on top of each other. Adjacent flow channels accommodate different media, between which a temperature exchange over the heat transfer surface of the heat transfer plates 5 takes place.

The heat transfer plates 5 include four through holes to form a corresponding number of through channels extending through the stack of plates 2 extend and are connected to the flow channels between the heat transfer plates 5 be formed. It should be noted that the plate stack 2 may also comprise a different number of passageways than the four in the illustrated embodiments.

The heat transfer plates 5 , the end plate 3 and the end plate 4 are arranged in such a way that they extend substantially parallel to a common main extension plane.

The heat transfer plates 5 , the end plate 3 and the end plate 4 are essentially made of stainless steel containing chromium. The heat transfer plates 5 are connected by a solder joint. Soldering is based on a brazing material based on copper, nickel, iron or silver, possibly including a flux that may contain fluorine. A thin foil or paste of solder material is placed in each space between the heat transfer plates 5 applied. After that, the plate stack can 2 be pressed together.

The plate stack 2 can be placed in a closed space (not disclosed) such as a vacuum oven under vacuum-type pressure conditions or in a gas environment consisting essentially of a noble gas or a reducing gas, where then a desired brazing temperature of up to about 1100 ° C with copper as Solder material and about 1200 ° C with nickel as the soldering material prevails.

At each short end of the end plate 3 extends a mounting bracket 6 from the end plate 3 , The mounting brackets 6 extend next to a centerline of the end plate 3 and parallel to it, that is the mounting brackets 6 are asymmetrical on the short sides of the end plate 3 arranged. The mounting brackets 6 may also be located in the middle of the short side of the end plate, but this is not shown. Similarly, it is not shown that more than one mounting bracket on each short side of the end plate 3 may be provided or that the long sides of the end plate 3 with mounting brackets 6 can be provided.

The longitudinal extension B of the mounting brackets 6 deviates from the longitudinal extent of the end plate 3 from. The deviation between the longitudinal extents generates a deviation angle α. The deviation angle α is between 1 and 15 ° and preferably between 2 and 8 °. It is important that the angle α be sufficiently large to allow plastic deformation of the mounting bracket 6 or at least part of the mounting bracket 6 to produce when the mounting plate 6 and the plate heat shear 1 at a place of attachment or block 9 be attached. If the angle α is less than 2 °, a plastic deformation of the mounting bracket or at least a part of the mounting bracket is not achieved, and if the angle α greater than 8 °, the mounting of the plate heat exchanger is problematic and the connection between the plate stack 2 and the endplates 3 . 4 can during mounting of the plate heat exchanger at the mounting location 9 break.

The crab 6 is with holes 8th provided to the plate heat exchanger 1 at a place of attachment 9 to fix. The plate heat exchanger 1 is fastened at the mounting location by means of bolts or similar fastening devices. Instead of holes in the mounting bracket 6 can also slots 8th at the mounting bracket 6 be provided to these at mounting locations 9 to fix.

With reference to 3 - 5 Now the attachment of the plate heat exchanger 1 described according to the invention. In 3 is the plate heat exchanger 1 along with a mounting location or block 9 shown on the plate heat exchanger 1 should be attached. The mounting block 9 includes passages or connections 10 that with the corresponding pass 7 of the plate heat exchanger 1 be connected (see 2 ). It also includes mounting holes 11 that the holes 8th of the plate heat exchanger 1 correspond.

To the plate heat exchanger 1 at the block 9 To attach, the plate heat exchanger 1 brought into its mounting position, so that the passages or connections 10 of the block 9 with the corresponding passages 7 of the plate heat exchanger 1 are connected. A bolt (not shown) or the like gets into the hole 8th the crab 6 and further into the hole 11 of the block 9 or used in the opposite direction. A nut (not shown) is screwed onto the bolt to tighten the bolt connection so that the plate heat exchanger 1 stuck to the block 9 is attached. During tightening of the bolt fastening becomes the mounting bracket 6 down to the block 9 pressed so that the longitudinal extent of the mounting bracket 6 and the longitudinal extent of the end plate 3 run parallel. The downward bending of the mounting bracket 6 to the block 9 creates a tension in the mounting bracket 6 and to some extent, plastic deformation in the joint or transition area between the mounting bracket 6 and the end plate 3 , The plastic deformation produces an improved resistance or a lower deformation at the same stress in the claimed areas; the tension in the mounting bracket 6 prevents the end plate 3 moved during a load, leaving seals between the plate heat exchanger 1 and the block 9 stay in place and avoid leakage.

According to another solution (not shown) is the block on which the plate heat exchanger 1 is fastened, provided with a mounting or mounting arrangement, wherein a staple of the end plate is inserted into a similar slot, whereas the other bracket is attached to the block with a bolt or the like as described above. After the first clip has been inserted into the slot or similar fixture, the remainder of the plate heat exchanger is pressed down, thereby creating a plastic deformation in the joint or transition region between the fixture clip and the end plate of the first clip. Since the plate heat exchanger has been pressed down into contact with the block, the second clip is tightened by the bolt or the like, so that plastic deformation of the second clip also occurs.

In from the above description, the clips are as at the end plate provided, which the mounting block and the through holes is closest, but it would also be possible in special cases, the brackets on the other end plate provided. The invention is not limited to the embodiments described above and the representations limited in the drawings, but can in any way be within the scope of the invention, such as it is defined by the appended claims, be supplemented or modified.

SUMMARY

The invention relates to a plate heat exchanger. A plate heat exchanger ( 1 ) comprises a disk stack ( 2 ) with two end plates ( 3 . 4 ) and a number of heat transfer plates ( 5 ) between the end plates ( 3 . 4 ) are arranged, wherein an end plate ( 3 . 4 ) with a fastening device ( 6 ) located outside the plate stack ( 2 ) and with passage at an end plate ( 3 . 4 ) provided for the connections ( 10 ) at a place of attachment ( 9 ), on which the plate heat exchanger ( 1 ) is attached. The longitudinal extent of the fastening device ( 6 ) differs with respect to the longitudinal extent of the remainder of the end plate ( 3 . 4 ) and the disk stack ( 2 ).

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 2005/0121182 A1 [0002, 0003]

Claims (8)

Plate heat exchanger ( 1 ) with a disk stack ( 2 ) with two end plates ( 3 . 4 ) and a number of heat transfer plates ( 5 ) between the end plates ( 3 . 4 ) are arranged, wherein an end plate ( 3 . 4 ) with a fastening device ( 6 ) located outside the plate stack ( 2 ), wherein the plate heat exchanger ( 1 ) continue with passes ( 7 ) on one end plate ( 3 . 4 ) provided for the connections ( 10 ) at a place of attachment ( 9 ) to which the plate heat exchanger ( 1 ), characterized in that the longitudinal extensions (B) of the fastening device ( 6 ) with respect to the longitudinal extent (A) of the remainder of the end plate ( 3 . 4 ) and the disk stack ( 2 ), and wherein the fastening device ( 6 ) can be defined so that the longitudinal extensions (B) of the fastening device ( 6 ) parallel to the longitudinal extent (A) of the end plate ( 3 . 4 ) and the disk stack ( 2 ), when the plate heat exchanger ( 1 ) at the place of attachment ( 9 ), wherein the deformation leads to an improved stability of the fastening device ( 6 ) leads. Plate heat exchanger ( 1 ) according to claim 1, wherein the fastening means take the form of brackets ( 6 ), which extends from the end plate ( 3 . 4 ). Plate heat exchanger ( 1 ) according to one of claims 1 and 2, wherein the fastening device ( 6 ) asymmetrically on the short sides of the end plate ( 3 . 4 ) is arranged. Plate heat exchanger ( 1 ) according to one of claims 1-3, wherein a fastening device ( 6 ) asymmetrically on each short side of the end plate ( 3 . 4 ) is arranged. Plate heat exchanger ( 1 ) according to one of claims 1-4, wherein the fastening device ( 6 ) with holes for fixing the plate heat exchanger ( 1 ) at the place of attachment ( 9 ) is provided. Plate heat exchanger ( 1 ) according to one of claims 1-4, wherein the fastening device ( 6 ) with slots for fixing the plate heat exchanger ( 1 ) at the place of attachment ( 9 ) is provided. Plate heat exchanger ( 1 ) according to one of claims 1-6, wherein a longitudinal extension (B) of the fastening device ( 6 ) with respect to the longitudinal extent (A) of the remainder of the end plate ( 3 . 4 ), and wherein the angle of deviation (α) is between 1 and 15 degrees, and preferably between 2 and 8 degrees. Plate heat exchanger ( 1 ) according to any one of claims 1-6, wherein the longitudinal extent (B) of the fastening device ( 6 ) with respect to the longitudinal extent (A) of the remainder of the end plate ( 3 . 4 ), and wherein the angle of deviation (α) is sufficiently large to permit plastic deformation of at least part of the fastening device ( 6 ) when the plate heat exchanger ( 1 ) at the place of attachment ( 9 ) is attached.