Top plate assembly of plate heat exchanger

Abstract

The top plate assembly comprises a partition plate and a top plate, the partition plate is of a rectangular corrugated plate structure with a ridge part and a groove part, and through holes are formed in the four corners of the partition plate correspondingly. Boss structures are formed at the positions, corresponding to the plate faces of two through holes, of the partition plate, and sinking table structures are formed at the positions, corresponding to the plate faces of the other two through holes, of the partition plate. A partition ridge which is as high as the ridge part and cuts off the ridge part and the groove part on the partition plate is arranged on the plate surface, corresponding to the position between the boss and the sinking table, of the partition plate in an upward protruding manner; the top plate is of a flat plate structure, four upwards-protruding bulge structures are arranged at the positions, corresponding to the four through holes, of the top plate respectively, and a first medium inlet, a first medium outlet, a second medium inlet and a second medium outlet are formed in the four bulge structures respectively. According to the utility model, the separation ridges are arranged on the separation plate, so that the flow division between heat exchange media is realized only through two plate sheets, and the manufacturing cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a top plate component of a plate heat exchanger. Background Art

[0002] Plate heat exchangers are widely used in refrigeration and heating systems as evaporators, condensers, economizers, etc. due to their compact structure, high heat transfer coefficient, strong reliability, and small refrigerant charge.

[0003] Existing plate heat exchangers generally include a heat exchange body and a top plate assembly stacked above the heat exchange body, wherein the heat exchange body mainly realizes heat exchange between two heat exchange media through two inter-plate spaces arranged alternately therein, and the top plate assembly is mainly used to connect with the external medium pipe to realize diversion between different heat exchange media and guide them into different inter-plate spaces of the heat exchange body; in order to facilitate its installation, the existing heat exchanger generally has four upwardly raised bulge structures on the top plate of the top plate assembly and corresponding medium inlets and outlets are opened on the bulges. However, in order to realize the diversion of two heat exchange media, the existing top plate assembly generally includes a top plate, a flat plate arranged below the top plate, and a corrugated plate arranged below the flat plate. The top plate assembly realizes diversion between the media by forming two dead water spaces that do not participate in heat exchange between the three plates, which causes waste of plates, increases the manufacturing cost of the heat exchanger, and has room for improvement. Utility Model Content

[0004] The present invention aims to overcome the above-mentioned defects in the prior art and provides a top plate assembly of a plate heat exchanger, which is provided with a partition ridge on the partition plate, so that the diversion between the heat exchange media is achieved by only two plates. Compared with the existing top plate assembly, one plate is omitted, thereby effectively reducing the manufacturing cost.

[0005] To achieve the above-mentioned object, the present invention provides a top plate assembly of a plate heat exchanger, characterized in that the top plate assembly includes a partition plate and a top plate stacked above the partition plate, the partition plate being a rectangular corrugated plate structure having ridges and grooves and having through holes at each of its four corners, the plate surface of the partition plate corresponding to two of the through holes being raised upward to form a convex structure having the same height as the ridge, and the plate surface corresponding to the other two through holes being recessed downward to form a sunken platform structure having the same height as the groove;

[0006] The plate surface of the partition plate corresponding to the convex platform and the sunken platform is upwardly raised and provided with a partition ridge of the same height as the ridge portion and which cuts off the ridge portion and the groove portion thereon;

[0007] The top plate is a flat plate structure and is provided with four upwardly protruding bulge structures corresponding to the four through holes. The four bulge structures are respectively provided with a first medium inlet, a first medium outlet, a second medium inlet and a second medium outlet.

[0008] It is further configured as follows: the first medium inlet and the first medium outlet are located at two ends of a long side and are arranged diagonally.

[0009] It is further configured that: the separation ridge is located in the middle of the short side of the separation plate and is arranged parallel to the long side.

[0010] It is further configured as follows: the top plate is provided with a first flange extending downward along its outer edge, the partition plate is provided with a second flange extending downward along its outer edge, and the top plate and the partition plate are connected by nesting the flanges.

[0011] Compared with the existing technology, the utility model has a simple and reasonable structure. The top plate assembly is composed only of a top plate and a partition plate. The separation ridge structure in the middle of the partition plate effectively realizes the diversion between the two heat exchange media. Compared with the existing top plate assembly, one plate is eliminated, thereby effectively simplifying the manufacturing and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a plate heat exchanger of the utility model;

[0013] Figure 2 It is a schematic diagram of the separation structure of the top plate assembly.

[0014] The following reference numerals are marked on the accompanying drawings:

[0015] 1. Heat exchange body; 2. Top plate assembly; 21. Top plate; 211. Bulge; 212. First medium inlet; 213. First medium outlet; 214. Second medium inlet; 215. Second medium outlet; 216. First flange; 22. Partition plate; 221. Ridge; 222. Groove; 223. Through hole; 224. Boss; 225. Sink; 226. Partition ridge; 227. Second flange. DETAILED DESCRIPTION

[0016] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0017] The utility model discloses a plate heat exchanger such as Figure 1As shown, it includes a heat exchange main body 1 and a top plate assembly 2 arranged above the heat exchange main body 1; wherein the heat exchange main body 1 is formed by stacking and welding a plurality of stainless steel plates and the corresponding adjacent plates are matched to form a first inter-plate space and a second inter-plate space arranged alternately, and the first heat exchange medium and the second heat exchange medium flow in the first inter-plate space and the second inter-plate space respectively to realize heat exchange between the two heat exchange media; four medium inlets and outlets for connecting to the external medium pipe are provided on the top plate assembly 2, namely the first medium inlet 212, the first medium outlet 213, the second medium inlet 214 and the second medium outlet 215, and the top plate assembly 2 is used to realize the diversion of the first heat exchange medium and the second heat exchange medium and introduce the two heat exchange media into the first inter-plate space and the second inter-plate space of the heat exchange main body 1 respectively.

[0018] In this embodiment, if Figure 2 As shown, the top plate assembly 2 includes a top plate 21 and a partition plate 22 stacked and arranged below the top plate 21 and sealed and welded to the top plate 21; wherein the partition plate 22 is a rectangular stainless steel corrugated plate structure with a ridge 221 and a groove 222 and a through hole 223 is opened at each of its four corners, and the ridge 221 and the groove 222 on the partition plate 22 are in a W-shaped, herringbone or oblique structure; the top plate 21 is a rectangular stainless steel flat plate structure adapted to the partition plate 22, and the top plate 21 is structured There are four upwardly protruding bulge 211 structures connected to the four through holes 223 on the partition plate 22, and each bulge 211 structure is provided with an opening to be used as the first medium inlet 212, the first medium outlet 213, the second medium inlet 214 and the second medium outlet 215 respectively, that is, the four through holes 223 are respectively located within the projection range of the four bulge 211 structures. In this way, by adjusting the bulge 211 structure on the top plate 21, the interface position of the top plate assembly 2 can be conveniently adjusted to facilitate the installation of the heat exchanger.

[0019] Specifically, such as Figure 2As shown, the four through holes 223 on the partition plate 22 correspond to the four medium inlet and outlet channels on the heat exchange main body 1. The plate surface of the partition plate 22 is provided with a convex platform 224 structure that is raised upward and has the same height as the ridge 221 at two of the through holes 223, and a sinking platform 225 structure that is recessed downward and has the same height as the groove 222 at the other two through holes 223. The plate surface of the partition plate 22 corresponding to the convex platform 224 and the sinking platform 225 is upwardly raised and provided with a separation ridge 226 that is the same height as the ridge 221 and cuts off the ridge 221 and the groove 222 on it. The convex platform 224, the ridge 221 and the separation ridge 226 on the partition plate 22 are connected to the top plate above. The plate surfaces 21 are welded together to form a dead water space between the partition plate 22 and the top plate 21, and the partition ridge 226 separates and cuts off the boss 224 and the sink 225 on both sides of the dead water space, avoiding the connection between adjacent bulge 211 structures through the groove 222, thereby realizing the diversion between the two heat exchange media; preferably, the first medium inlet 212 and the first medium outlet 213 are located at both ends of the long side and are arranged diagonally, and the partition ridge 226 is located in the middle of the short side of the partition plate 22 and is arranged parallel to the long side to cut off the ridge 221 and the groove 222 on the partition plate 22 from the middle position, thereby optimizing the flow and distribution of the heat exchange medium in the heat exchanger.

[0020] In this embodiment, the plate surface of the top plate 21 is provided with a first flange 216 extending downward along its outer edge, and the plate surface of the partition plate 22 is provided with a second flange 227 extending downward along its outer edge. The top plate 21 and the partition plate 22 are connected by nesting the flanges, which facilitates positioning welding between the top plate 21 and the partition plate 22.

[0021] Compared with the existing technology, the utility model has a simple and reasonable structure. The top plate assembly is composed only of a top plate and a partition plate. The separation ridge structure in the middle of the partition plate effectively realizes the diversion between the two heat exchange media. Compared with the existing top plate assembly, one plate is eliminated, thereby effectively simplifying the manufacturing and reducing the production cost.

[0022] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A top plate assembly of a plate heat exchanger, characterized in that: The top plate assembly includes a partition plate and a top plate stacked above the partition plate. The partition plate is a rectangular corrugated plate structure having a ridge and a groove, and through holes are opened at its four corners. The plate surface of the partition plate corresponding to two of the through holes is raised upward to form a convex structure with the same height as the ridge, and the plate surface corresponding to the other two through holes is recessed downward to form a sunken platform structure with the same height as the groove. The plate surface of the partition plate corresponding to the convex platform and the sunken platform is upwardly raised and provided with a partition ridge of the same height as the ridge portion and which cuts off the ridge portion and the groove portion thereon; The top plate is a flat plate structure and is provided with four upwardly protruding bulge structures corresponding to the four through holes. The four bulge structures are respectively provided with a first medium inlet, a first medium outlet, a second medium inlet and a second medium outlet.

2. The top plate assembly of a plate heat exchanger according to claim 1, characterized in that: The first medium inlet and the first medium outlet are located at two ends of a long side and are arranged diagonally.

3. The top plate assembly of a plate heat exchanger according to claim 1, characterized in that: The dividing ridge is located in the middle of the short side of the dividing plate and is arranged parallel to the long side.

4. The top plate assembly of a plate heat exchanger according to claim 1, characterized in that: The top plate is provided with a first flange extending downward along its outer edge, and the partition plate is provided with a second flange extending downward along its outer edge. The top plate and the partition plate are connected by nesting the flanges.

Images