CN212378568U

CN212378568U - Plate heat exchanger

Info

Publication number: CN212378568U
Application number: CN202020804873.9U
Authority: CN
Inventors: 李华; 郑希茹; 其他发明人请求不公开姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2020-04-01
Filing date: 2020-05-14
Publication date: 2021-01-19
Anticipated expiration: 2030-05-14
Also published as: CN112414182A

Abstract

A plate heat exchanger comprises a plurality of plates which are arranged in a stacked mode and have the same structure and size, wherein the plates comprise a first plate and a second plate which are adjacent to each other, and the second plate is horizontally rotated 180 degrees relative to the first plate so as to save the cost of a mold. The plate is provided with a plurality of convex points and a plurality of concave points in the main heat exchange area, and the convex points are convex relative to the concave points on the first surface; the two adjacent convex points are in transition through a concave first curved surface structure, the two adjacent concave points are in transition through a convex second curved surface structure, the lowest point of the first curved surface structure is higher than the concave point, and the highest point of the second curved surface structure is lower than the convex point; the concave point on the first plate contacts with the convex point on the second plate; the convex points on the first plate are opposite to the concave points on the second plate, so that the assembly of the plates with the dense convex point and concave point structures can be realized.

Description

Plate heat exchanger

Technical Field

The application relates to a plate heat exchanger, which belongs to the technical field of heat exchangers.

Background

Plate heat exchangers in the related art present challenges to plate assembly for realizing a compact and efficient channel structure, and if the assembly effect between plates is not good, for example, the welding position is misaligned, the flow of fluid on the plates is affected, and thus the heat exchange performance of the plate heat exchanger is ultimately affected.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a lower and better plate heat exchanger of slab equipment effect of cost.

In order to achieve the purpose, the following technical scheme is adopted in the application: a plate heat exchanger comprises a plurality of plates which are arranged in a stacked mode and have the same structure and size, wherein the plurality of plates comprise a first plate and a second plate which are adjacent, and the second plate is horizontally rotated 180 degrees relative to the first plate; the plate is provided with a main heat exchange area, the plate comprises a first surface and a second surface opposite to the first surface, and the first surface of the second plate is opposite to the second surface of the first plate;

the plate is provided with a plurality of convex points and a plurality of concave points in the main heat exchange area, and the convex points are convex relative to the concave points on the first surface; the two adjacent convex points are in transition through a concave first curved surface structure, the two adjacent concave points are in transition through a convex second curved surface structure, the lowest point of the first curved surface structure is higher than the concave point, and the highest point of the second curved surface structure is lower than the convex points; along a plane perpendicular to the lamination direction of the plates, at least partial area of the projection of each convex point on the plane and at least partial area of the projection of one concave point on the plane are centrosymmetric with the projection point of the right center of the plate on the plane;

the concave points of the first plate are in at least partial area contact with the convex points on the second plate; the convex points of the first plate are opposite to the concave points on the second plate at least in partial areas, and fluid flowing spaces are formed between the adjacent first plate and the second plate;

the plate is also provided with two first through holes and two second through holes, the first through holes of the first plate are opposite to the second through holes of the second plate, and the first through holes and the second through holes are communicated with the fluid flowing space; the plate surface of the first plate surrounding the edge of the second through hole is hermetically connected with the plate surface of the second plate surrounding the edge of the first through hole, so that the second through hole of the first plate and the first through hole of the second plate are isolated from the fluid circulation space.

First slab is 180 degrees for second slab horizontal rotation in this application, and the structure and the size homogeneous phase of a plurality of slabs of plate heat exchanger can just produce first slab and second slab through one set of mould, has saved the mould cost, is favorable to reducing the accumulative total tolerance of slab processing that forms when making the slab through two sets and above moulds. For the slab that is equipped with a plurality of salient points and a plurality of sunken point to main heat transfer region, at the plane along the range upon range of direction of perpendicular to slab, through to the design that realizes central symmetry for the projection point at slab center to slab salient point projection position and sunken point projection position, be favorable to making the slab satisfy and realize the self-assembly between the same slab after rotatory 180, thereby be favorable to making the plate heat exchanger of this application can realize the equipment of the slab that has intensive salient point and sunken point structure, be favorable to improving the assembly effect between the slab, thereby improve plate heat exchanger's heat transfer performance.

Drawings

Fig. 1 is a schematic perspective view of a plate heat exchanger according to the present application.

Fig. 2 is a perspective view of a plate of the present application.

Fig. 3 is a top view of the first plate.

Fig. 4 is a top view of the second plate.

Fig. 5 is a partially enlarged view of a circled portion M in fig. 2.

Fig. 6 is a partially enlarged view of the picture frame portion N of fig. 4.

Fig. 7 is an enlarged view of a portion of the primary heat exchange area of fig. 2.

Fig. 8 is a partial perspective view of two first sheet pieces alternating with two second sheet pieces.

Fig. 9 is an exploded perspective view of fig. 8.

Fig. 10 is a partial front view of fig. 8.

FIG. 11 is an enlarged view of a portion of a first embodiment of the raised structure of the transition zone of the present application.

FIG. 12 is an enlarged view of a portion of a second embodiment of the raised structure of the transition zone of the present application.

Detailed Description

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. If several embodiments exist, the features of these embodiments may be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The statements made in the following exemplary detailed description do not represent all implementations consistent with the present application; rather, they are merely examples of apparatus, products, and/or methods consistent with certain aspects of the present application, as recited in the claims of the present application.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in the specification and claims of this application, the singular form of "a", "an", or "the" is intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like, as used in the description and claims of this application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the appearances of the phrases "in an" or "in an" embodiment "or the like are not necessarily limited to the particular position or orientation. The word "comprise" or "comprises", and the like, is an open-ended expression meaning that an element that precedes "includes" or "comprising" includes "that the element that follows" includes "or" comprises "and its equivalents, that do not preclude the element that precedes" includes "or" comprising "from also including other elements. In this application, the meaning of "a number" if it occurs is two as well as more than two.

Referring to fig. 1 to 10, the present application discloses a plate heat exchanger 100, which includes a plurality of plates 7 stacked and having the same structure and size, wherein the plurality of plates 7 are provided with a first fluid inlet 3, a first fluid outlet 4, a second fluid inlet 5 and a second fluid outlet 6. The plurality of plates 7 comprises adjacent first plates 1 and second plates 2, wherein the first plates 1 and the second plates 2 are alternately arranged in the thickness direction T-T of the plate heat exchanger 100. Referring to fig. 1 and 10, a fluid flowing space 75 is formed between two adjacent first plates 1 and second plates 2. The fluid flow space 75 includes a first fluid flow space 751 communicating with the first fluid inlet 3 and the first fluid outlet 4, and a second fluid flow space 752 communicating with the second fluid inlet 5 and the second fluid outlet 6. It will be appreciated that the first fluid flow spaces 751 and the second fluid flow spaces 752 are alternately arranged in the thickness direction T-T of the plate heat exchanger 100, e.g. the first fluid flow spaces 751 are located at odd numbered levels and the second fluid flow spaces 752 are located at even numbered levels, or vice versa. The first fluid inlet 3 is used for the inflow of a first fluid medium, the second fluid inlet 5 is used for the inflow of a second fluid medium, and the first fluid medium and the second fluid medium exchange heat through the plate heat exchanger 100 of the present application. Since the working principle of a plate heat exchanger is well known to those skilled in the art, the present application is not described in detail herein.

The first plate 1 and the second plate 2 are formed by plates 7 with the same structure. Referring to fig. 3 and 4, the second plate 2 is horizontally rotated 180 degrees with respect to the first plate 1. By the design, the first plate 1 and the second plate 2 can be manufactured by only one set of die, so that die cost is saved.

Referring to FIG. 3, the plate 7 is substantially rectangular and has a width direction W-W and a length direction L-L. The plate 7 is provided with a plate portion 71 and a main heat exchange area 72, wherein the plate portion 71 is located on both sides of the main heat exchange area 72 in the length direction L-L. The plate 7 includes a first surface 721 (e.g., an upper surface) and a second surface 722 (e.g., a lower surface) opposite the first surface 721. In the embodiment illustrated in the present application, the plate portion 71 is provided with two first perforations 711 and two second perforations 712. The two first through holes 711 and the two second through holes 712 are substantially distributed at four corners of the rectangle. In the illustrated embodiment of the present application, two first through holes 711 are aligned along the length direction L-L, two second through holes 712 are also aligned along the length direction L-L, one first through hole 711 and one second through hole 712 located on the same side are aligned along the width direction W-W, and the other first through hole 711 and the other second through hole 712 located on the same side are also aligned along the width direction W-W.

In the illustrated embodiment of the present application, the first through hole 711 is a convex hole, and the second through hole 712 is a flat hole. Specifically, on the first surface 721 of the plate 7, a first boss 7110 (see fig. 2) protruding from the plate portion 71 is formed on the periphery of the first through hole 711, so that the first through hole 711 is a convex hole and the second through hole 712 is a planar hole penetrating through the plate portion 71.

In addition, the plate portion 71 is further provided with a plurality of ribs 715, the ribs 715 protruding relative to the plate portion 71 at the first surface 721, and in the embodiment illustrated in the present application, the ribs 715 include a plurality of first ribs 7151 between one first perforation 711 and one second perforation 712 and a plurality of second ribs 7152 between the other first perforation 711 and the other second perforation 712. The first ribs 7151 and the second ribs 7152 are symmetrically arranged on two sides of the plate 7. The number of the first ribs 7151 and the second ribs 7152 includes at least two ribs having different sizes, respectively.

The plate 7 is provided with a plurality of raised points 73 and a plurality of recessed points 74 in the primary heat exchange area 72, the raised points 73 being raised relative to the recessed points 74 at the first surface 721. Referring to fig. 7, two adjacent convex points 73 are transited by a concave first curved surface structure 731, two adjacent concave points 74 are transited by a convex second curved surface structure 741, a lowest point 7311 of the first curved surface structure 731 is higher than the concave point 74, and a highest point 7411 of the second curved surface structure 741 is lower than the convex point 73. So designed, these convex points 73 and concave points 74 constitute a dense point wave, and how to assemble the dense point wave to improve the quality is also the technical content related to the present application. In the illustrated embodiment of the present application, the lowest point 7311 of the first curved surface structure 731 coincides with the highest point 7411 of the second curved surface structure 741. Referring to FIG. 6, the convex dots 73 and the concave dots 74 are alternately arranged along the width direction W-W and the length direction L-L. Around a convex point 73, adjacent to the convex point 73, four concave points 74 are arranged around the convex point 73; centered on a recessed point 74, around the recessed point 74 and adjacent to the recessed point 74 are four raised points 73.

For a plate 7, along a plane perpendicular to the stacking direction of the plates 7, the projection of each convex point 73 on the plane and the projection of one concave point 74 on the plane are in central symmetry with respect to the projection point of the plate at the plane at the midpoint thereof, and correspondingly, the projection of each concave point 74 on the plane and the projection of one convex point 73 on the plane are in central symmetry with respect to the projection point of the plate at the midpoint thereof. It should be noted that the terms "convex point" and "concave point" used in the present application do not refer to a theoretical point, but refer to a certain raised or depressed unit structure, and each unit structure is regarded as a "point" because the area occupied by itself is small compared with the area of the plate 7.

When the first plate 1 and the second plate 2 are assembled in a stack:

the first surface 721 of the second plate 2 is arranged opposite to the second surface 722 of the first plate 1; a fluid flow space 75 is formed between the first plate 1 and the second plate 2;

the first through hole 711 of the first plate 1 is opposite to the second through hole 712 of the second plate 2 with a gap communicating with the fluid flow space 75 formed therebetween; the second through hole 712 of the first plate 1 is opposite to the first through hole 711 of the second plate 2, and the plate surface of the first plate 1 surrounding the edge of the second through hole 712 is hermetically connected with the plate surface of the second plate 2 surrounding the edge of the first through hole 711, so that the second through hole 712 of the first plate 1 and the first through hole 711 of the second plate 2 are both isolated from the fluid circulation space 75.

The recessed points 74 on the first plate 1 are in contact with and secured to the raised points 73 on the second plate 2, the raised points 73 on the first plate 1 being opposite the recessed points 74 on the second plate 2. Thereby achieving self-assembly between identical plates.

Compared with the method of manufacturing the first plate 1 and the second plate 2 by using two sets of dies respectively, the method of manufacturing the plate 7 by using one set of dies is beneficial to reducing the deviation caused by the accuracy of the two sets of dies, so that the problem of assembling the first plate 1 and the second plate 2 during stacking is caused.

Referring to fig. 2 and 7, in order to reduce the difficulty of manufacturing and assembling, the plate 7 further includes a transition area 76. The transition area 76 is arranged, so that when the plate 7 is machined and manufactured, the plate can be manufactured by a mold in a region dividing mode, namely, partial regions can be manufactured respectively, the machining and manufacturing difficulty is reduced, the region which needs large-area concave point and convex point machining originally is reduced to the region which needs small-area concave point and convex point machining, the transition area 76 is equivalent to the boundary between the partial regions, and when the plate is machined and manufactured, the transition area can be used as a reference object of the boundary, so that the machining and manufacturing precision of each partial heat exchange region is improved, and the manufacturing and processing errors are reduced. For the plurality of protruding points 73 and the plurality of recessed points 74, at least some of the plurality of protruding points 73 and the plurality of recessed points 74 are distributed on both sides of the transition region 76 along the length direction L-L of the plate 7, so that the main heat transfer region 72 forms a first heat transfer region 723 and a second heat transfer region 724 on both sides of the transition region 76, respectively. The plurality of convex points 73 and the plurality of concave points 74 located in the first heat transfer area 723 are uniformly distributed, and the plurality of convex points 73 and the plurality of concave points 74 located in the second heat transfer area 724 are uniformly distributed; the dimension of the first heat transfer zone 723 in the length direction L-L of the plate 7 is equal to the dimension of the second heat exchanger 722 in the length direction L-L of the plate. The transition zone 76 extends in a direction perpendicular to the longitudinal direction of the panel 7, and a center line S2 of the extension direction of the transition zone 76 coincides with a center line S1 of the panel 7 in the width direction W-W thereof.

The size of the transition area 76 arranged along the length direction L-L of the plate can be set according to actual conditions, the plurality of protruding points 73 can be arranged in a row along the width direction W-W of the plate by taking the protruding points 73 as a reference, and the size of the transition area 76 arranged along the length direction L-L of the plate can be set to be capable of arranging 1-4 rows of protruding points 73. Specifically, referring to fig. 7, in the illustrated embodiment of the present application, the plurality of protrusions 73 includes a plurality of first protrusions 733 and a plurality of second protrusions 734; in any one of the first heat transfer region 723 and the second heat transfer region 724, the plurality of first protrusions 733 form at least one row in the width direction W-W of the sheet 7, and the plurality of second protrusions 734 form a plurality of rows in the width direction W-W of the sheet 7; the first projection point 733 is closer to the transition region 76 than the second projection point 734, and the size of the first projection point 733 is larger than the size of the second projection point 734. Accordingly, the plurality of pit points 74 includes a plurality of first pit points 743 and a plurality of second pit points 744. The size of first indentation point 743 is larger than the size of second indentation point 744; along a plane perpendicular to the lamination direction of the plate 7, the projection of each first sunken point 743 on the plane is centrosymmetric to the projection of one first protruded point 731 on the plane by taking the projection point of the center of the plate on the plane as the center; the projection of each second indentation point 744 on the plane is centrosymmetric to the projection of one second protrusion point 732 on the plane about the projection point of the plate midpoint on the plane.

By the design, the die can be conveniently manufactured. Specifically, when the transition region 76 exists, the distance between the convex points on the two sides of the transition region 76 in the plate length direction L-L is relatively long, and when the adjacent plates are assembled, in order to reduce the risk that the relatively long convex points are welded poorly and the problem that the plate deformation and the like affect the plate assembly stability due to the large fluid pressure, the size of the convex points can be increased appropriately, that is, the size of the first convex point 733 which is relatively close to the transition region 76 is appropriately larger than the size of the second convex point 734, so that the welding area of the first convex point 733 can be increased, the plate connection strength of the region near the transition region 76 can be increased, and the overall stability of the plate heat exchanger product can be improved.

In the transition zone 76, the plate 7 is provided with a flat portion 761, the flat portion 761 forming a plane both at the first surface 721 and at the second surface 722, the flat portion 761 being lower than the projection 73 and higher than the depression 74. The line of the transition area 76 on the side, viewed in the direction parallel to the width W-W of the plate 7, can be used as a marking line for observing whether the first plate 1 and the second plate 2 are aligned when the plate 7 is assembled, which is beneficial to improving the assembling quality.

As shown in fig. 11, in order to enhance the heat exchange, the plate 7 is further provided with a raised structure 763 at the transition region 76, and the raised structure 763 is raised from the flat portion 761 at the first surface 721.

In one embodiment, the protruding structure 763 includes a plurality of extending segments 762, two ends of the extending direction of each extending segment 762 are respectively connected to two first protruding points 733 located at two sides of the transition region 76, in some cases, the extending direction of each extending segment 762 respectively passes through the centers of two first protruding points 733 located at two sides of the transition region 76 and adjacent to the transition region 76, the extending directions of two adjacent extending segments 762 intersect, the protruding structure 763 may be in a continuous form, and the protruding structure 763 undulates up and down along the width direction W-W of the sheet 7.

Referring to fig. 12, in another embodiment, at least some of the protrusions 73 and the depressions 74 are distributed in the transition region 76, so that the plate 7 forms an alternating concave-convex structure in the transition region 76, and the at least some of the protrusions 73 may be the first protrusions 733 and/or the second protrusions 734.

The above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and the present application should be understood by those skilled in the art based on the detailed description of the present application with reference to the above embodiments, but those skilled in the art should understand that the present application can be modified or substituted equally by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the claims of the present application.

Claims

1. The utility model provides a plate heat exchanger, its is including piling up a plurality of slabs that set up and structure and size are all the same, a plurality of slabs include adjacent first slab and second slab, its characterized in that: the second plate is horizontally rotated 180 degrees relative to the first plate; the plate is provided with a main heat exchange area, the plate comprises a first surface and a second surface opposite to the first surface, and the first surface of the second plate is opposite to the second surface of the first plate;

the concave points of the first plate are in at least partial area contact with the convex points of the second plate; the convex points of the first plate are opposite to the concave points of the second plate at least in partial areas, and fluid flowing spaces are formed between the adjacent first plate and the second plate;

2. A plate heat exchanger according to claim 1, wherein: the main heat exchange area of the plate comprises a transition area, and for the plurality of convex points and the plurality of concave points, at least parts of the plurality of convex points and the plurality of concave points are distributed on two sides of the transition area along the length direction of the plate, so that the main heat exchange area forms a first heat exchange area and a second heat exchange area on two sides of the transition area respectively; the central line of the extension direction of the transition area coincides with the central line of the plate along the width direction of the plate, and the size of the first heat exchange area along the length direction of the plate is equal to the size of the second heat exchange area along the length direction of the plate.

3. A plate heat exchanger according to claim 2, wherein: the plurality of convex points and the plurality of concave points positioned in the first heat exchange area are uniformly distributed, and the plurality of convex points and the plurality of concave points positioned in the second heat exchange area are uniformly distributed.

4. A plate heat exchanger according to claim 3, wherein: the plurality of raised points comprises a plurality of first raised points and a plurality of second raised points;

in any one of the first heat exchange area and the second heat exchange area, the plurality of first protrusions form at least one row along the width direction of the plate sheet, and the plurality of second protrusions form a plurality of rows along the width direction of the plate sheet; the first convex point is closer to the transition region than the second convex point, and the size of the first convex point is larger than that of the second convex point;

correspondingly, the plurality of recessed points comprise a plurality of first recessed points and a plurality of second recessed points, and the size of the first recessed points is larger than that of the second recessed points; along a plane perpendicular to the lamination direction of the plates, the projection of each first sunken point on the plane and the projection of one first convex point on the plane are centrosymmetric with the projection point of the centre of the plate on the plane; the projection of each second sunken point on the plane is centrosymmetric to the projection of one second salient point on the plane by the projection point of the plate right center on the plane.

5. A plate heat exchanger according to claim 3 or 4, wherein: in the transition area, the plate is provided with a flat portion, the flat portion forms a plane on both the first surface and the second surface, and the flat portion is lower than the protrusion point and higher than the indentation point.

6. A plate heat exchanger according to claim 5, wherein: in the transition region, the plate is further provided with a raised structure which is raised from the flat portion on the first surface.

7. A plate heat exchanger according to claim 6, wherein: the protruding structure comprises a plurality of extending sections, two ends of each extending section in the extending direction are respectively connected with two first protruding points located on two sides of the transition area, and the extending directions of two adjacent extending sections are intersected.

8. A plate heat exchanger according to claim 4, wherein: and part of convex points and part of concave points are distributed in the transition region, so that the plates form a structure with alternate concave and convex points in the transition region, and the part of convex points are first convex points and/or second convex points.

9. A plate heat exchanger according to claim 1, wherein: four concave points are arranged around the convex point and adjacent to the convex point by taking the convex point as the center; and taking a concave point as a center, wherein four convex points are arranged around the concave point and adjacent to the concave point, and the lowest point of the first curved surface structure is coincided with the highest point of the second curved surface structure.

10. A plate heat exchanger according to claim 1, wherein: the plate comprises plate parts which are positioned at two sides of a main heat exchange area in the length direction of the plate, the two first through holes and the two second through holes are arranged on the plate parts, and first bosses protruding out of the plate parts are formed on the peripheral sides of the first through holes on the first surface of the plate, so that the first through holes form convex surface holes; the second perforation is a planar hole that penetrates the sheet portion.