Plate heat exchanger plate, plate heat exchanger and plate heat exchanger with unequal cold and hot medium flow

Abstract

The utility model relates to a plate heat exchanger plate, a plate heat exchanger and a plate heat exchanger with unequal cold and hot medium flow. The plate comprises a corner hole area, a sealing area and a heat exchange area, supporting points on the corner hole area and the sealing area are symmetrically arranged relative to the longitudinal axis of the plate, the supporting points on the corner hole area and the sealing area are completely opposite in convex-concave mode relative to the transverse axis of the plate, and the convex-concave supporting points on the periphery of the sealing area are of an all-through opening structure. An even number of plates in a plurality of plates in the heat exchanger are installed by horizontally rotating 180 degrees on the basis of an odd number of plates, the plurality of plates are formed by alternately arranging a plurality of multi-runner plate pairs and a plurality of single plates, and the installation positions of sealing gaskets of the single plates and the installation positions of plate sealing gaskets of the multi-runner plate pairs are symmetrically arranged relative to the longitudinal axes of the plates. The left end and the right end of the plate sheet are designed to be vertically symmetrical and completely consistent in structure, and through different bonding combination assembling modes of the plate sheet and the sealing gasket, the product has multiple functions, different flow ratio requirements of users can be fully met, meanwhile, resistance loss is reduced, and heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment, in particular to a plate heat exchanger plate and a plate heat exchanger and a plate heat exchanger with unequal flow rates of cold and hot media. Background Art

[0002] A plate heat exchanger is a device used for heat exchange. It consists of a series of plate adhesive (hanging) pads. These plate components are tightly combined together by clamping force to form a plate bundle. Each plate has a certain shape and size, and there are small intervals between each other to form a flow channel for hot and cold fluids. The plate heat exchanger can perform hot and cold exchange through two different fluids, thereby transferring heat from one fluid to another to achieve heat transfer and energy conversion.

[0003] With the continuous development of the field of heat exchange equipment, the user selection conditions are constantly changing. The flow rate of the medium on the cold and hot sides of conventional products is basically close to 1:1, but in some special conditions, such as steam heating of air conditioning water, the flow rate ratio of the medium on the cold and hot sides often reaches 2:1 or more. In the past, when encountering such a situation, two sets of plate molds and two sets of sealing gasket molds were usually used to press two different plates and vulcanize two different sealing gaskets, and such working conditions were met through different assembly forms. The disadvantages of the above-mentioned plate-type equipment are low heat exchange efficiency, increased heat exchange area required for the same working conditions, and an additional set of plate molds and sealing gasket molds are added to the core component plates and sealing gaskets on the basis of normal pressing and vulcanization, which increases the procurement and manufacturing costs, and there are many types of plates and sealing gaskets, which are not easy to assemble and store. In addition, due to the limitations of plates and sealing gaskets, the fluid flow mode of such plates and gaskets can only be unilateral flow or diagonal flow, and the user pipeline connection is limited.

[0004] Based on the above reasons, it is urgent to develop a new type of plate heat exchange equipment to achieve the purpose of adjustable flow of cold and hot side media. Summary of the invention

[0005] The utility model aims to provide a plate heat exchanger with unequal plate pieces and cold and hot medium flow rates, wherein the number of cold and hot side medium flow channels of the heat exchanger is unequal, the installation is convenient, and the purchase and manufacturing cost is low.

[0006] The technical solution of this utility model:

[0007] A plate for a plate-type heat exchanger, the plate comprising corner hole areas at both ends, a sealing area and a heat exchange area in the middle, the supporting points on the corner hole areas and the sealing area at both ends of the plate are symmetrically arranged with the longitudinal axis of the plate as the center, and the supporting points on the corner hole areas and the sealing area at both ends of the plate are arranged with the convex and concave shapes being completely opposite with the transverse axis of the plate as the center.

[0008] A plate heat exchanger with unequal flow rates of cold and hot media comprises a fixed plate, a movable plate, a first plate, an end plate and a plurality of plates arranged between the fixed plate and the movable plate, the plurality of plates being arranged between the first plate and the end plate, the first plate, the end plate and the plurality of plates being clamped to form a plate bundle, the plates being the above-mentioned plate heat exchanger plates, the even-numbered plates among the plurality of plates being installed by rotating 180 degrees horizontally on the basis of the odd-numbered plates, the plurality of plates being composed of a plurality of multi-channel plate pairs and a plurality of single plates arranged alternately, the multi-channel plate pairs being composed of a plurality of plates, the sealing gaskets of the plurality of plates being installed at the same position, the sealing gaskets of the single plate and the sealing gaskets of the multi-channel plate pairs being symmetrically arranged about the longitudinal axis of the plate.

[0009] Beneficial effects of the utility model:

[0010] 1. The left and right ends of the heat exchanger plate of this application are designed to be symmetrical in the upper and lower parts, and the structure is completely consistent. Under the premise of ensuring the performance of the equipment, through different bonding and combination assembly forms with sealing gaskets, the product can achieve multiple functions in one machine, which can fully meet the user's different flow ratio requirements, while reducing resistance loss and improving heat exchange efficiency.

[0011] 2. The heat exchanger plate of the present application adopts a fully open structure with convex and concave support points around the sealing groove, and the support points around the sealing groove are densely arranged, which can provide single-sided or diagonal connection methods according to the user's pipeline connection needs.

[0012] 3. Due to the special design of the core component plates, the heat exchanger of this application can realize multi-functionality through different bonding combinations and assembly forms with sealing gaskets, fully meeting the different flow ratio requirements of users, while reducing resistance losses and improving heat exchange efficiency. It can also facilitate the diversity of external pipeline connections, and the core component plates are pressed with only one set of molds, which reduces the purchase and manufacturing costs of the equipment and makes up for the shortcomings of existing heat exchange equipment technology. Not only that, this utility model also has the advantages of novel and unique inventive conception, compact and reasonable structure, stable and reliable performance, reduced process links, energy-saving and consumption-reducing production, wide range of applications, broad development prospects, and suitable for industry promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the plate structure of the plate heat exchanger of this application;

[0015] Figure 2 This is a partial enlarged view of one end of a plate of a plate heat exchanger of the present application;

[0016] Figure 3 This is a partial enlarged view of the other end of the plate of the plate heat exchanger of this application;

[0017] Figure 4 This is a partial enlarged view of the convex and concave support points around the sealing groove of the heat exchanger plate of this application;

[0018] Figure 5 This is a schematic diagram of a heat exchanger with a flow channel ratio of 1:1 in this application;

[0019] Figure 6 This is a schematic diagram of the arrangement of heat exchanger plates and the bonding position of sealing gaskets with a flow channel ratio of 1:1 in this application;

[0020] Figure 7 This is a schematic diagram of a heat exchanger process combination with a flow channel ratio of 1:1 in this application;

[0021] Figure 8 This is a schematic diagram of a heat exchanger with a flow channel ratio of 2:1 for this application;

[0022] Fig. 9 This is a schematic diagram of the arrangement of heat exchanger plates and the bonding position of sealing gaskets with a flow channel ratio of 2:1 in this application;

[0023] Fig.10 This is a schematic diagram of the heat exchanger process combination with a flow ratio of 2:1 in this application.

[0024] Reference numerals:

[0025] Plate 1; fixed plate 2; movable plate 3; first plate 4; last plate 5; sealing gasket 6; multi-channel plate pair 7; corner hole area 11; one sealing groove 12; two sealing grooves 13; heat exchange area 14; peripheral sealing grooves 15; gap 16. DETAILED DESCRIPTION

[0026] In order to solve the problems in the background technology, a plate heat exchanger with unequal flow rates of plate heat exchanger plates and hot and cold media is specially invented. The external pipeline connection of this equipment can adopt both unilateral flow and diagonal flow, and through the special design of the core component plates, it is ensured that the equipment can meet the 1:1 flow ratio requirement of conventional heat exchange equipment and the different flow ratios of 2:1 and higher ratios on the hot and cold sides through different bonding assembly forms. At the same time, the heat exchange effect of the equipment is fully improved, the resistance loss of the equipment is reduced, and the best match between the two is achieved.

[0027] A plate 1 for a plate-type heat exchanger comprises corner hole areas 11 at both ends, a sealing area (including the area around a first sealing groove 12 and the area around a second sealing groove 13), a heat exchange area 14 in the middle and a sealing groove 15 around the plate. The corner hole areas 11 at both ends of the plate and the supporting points on the sealing area are symmetrically arranged with the longitudinal axis of the plate as the center, and the corner hole areas 11 at both ends of the plate and the supporting points on the sealing area are arranged with the transverse axis of the plate as the center, and the convex and concave shapes of ...

[0028] The gaps between the convex and concave support points on both sides of the sealing groove 15, the first sealing groove 12 and the second sealing groove 13 around the heat exchanger plate are of the same height, and are in the same height as the sealing groove 15, the first sealing groove 12 and the second sealing groove 13 around the heat exchanger plate. Due to the special characteristics of the design of the fully open structure of the sealing groove 15, the first sealing groove 12 and the second sealing groove 13 of the plate, and the consistent upper and lower symmetrical structures, the sealing gasket is free to bond on the water side and the sealing side, and can be switched at will. Therefore, whether it is a conventional equal flow product assembly or a single and double flow channel interval assembly, the unilateral or diagonal flow mode can be arbitrarily selected according to the user's piping requirements. The convex and concave support points on both sides of the sealing groove around the plate and the first and second sealing grooves are designed as a fully open structure, and the convex and concave support points of the sealing groove are encrypted on the original basis, increasing the number of support points and improving the pressure bearing capacity of the equipment.

[0029] The application is described in detail below with reference to the accompanying drawings:

[0030] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] like Figure 1 As shown, the heat exchanger plate, the core component of the heat exchanger, is mainly designed into three areas, namely the corner hole area 11 and the sealing area at the left end, the corner hole area 11 and the sealing area at the right end, and the corrugated heat exchange area in the middle. The main feature is that the convex and concave support points of the fluid flow side and the sealing side (i.e., the corner hole area and the sealing area) at the left end are designed to be symmetrical up and down, and the structure is completely consistent, and the convex and concave support points of the fluid flow side and the sealing side (i.e., the corner hole area and the sealing area) at the right end are also designed to be symmetrical up and down, and the structure is completely consistent. The convex and concave support points of the left end and the right end are completely opposite, and the second plate is rotated 180 degrees and assembled with the first plate to form a honeycomb fluid flow channel.

[0032] like Figure 2-4As shown, the gap 16 between the convex and concave support points on both sides of the sealing groove around the heat exchange plate and the first and second sealing grooves is of the same height, and is consistent with the sealing groove around the heat exchanger plate, the first sealing groove and the second sealing groove. It is designed as a fully open structure, and the convex and concave support points of the sealing groove are encrypted on the original basis, increasing the number of support points and improving the pressure bearing capacity of the equipment. The corrugation of the middle heat exchange zone is directly connected to the left and right ends, and no transition zone is set. During assembly, different methods are used to bond and assemble the plate and gasket assembly according to the different flow ratios required by the user. Single-sided or diagonal connection methods can be provided according to the user's pipeline connection requirements.

[0033] The plate heat exchanger of the present application can meet the user's selection conditions of equal flow of cold and hot fluids, and can also meet the needs of unequal flow on both sides. At the same time, it can also provide two connection methods, single-side or diagonal, according to the different piping requirements of users, optimize the design of the equipment, fully reflect the performance of high heat transfer and low resistance, and fully meet the ever-changing market needs of users.

[0034] The following describes the structure and assembly process of the plate heat exchanger for the working condition where the flow rates of hot and cold fluids are equal:

[0035] like Figure 5-7 As shown, a plate heat exchanger comprises a fixed plate 2, a movable plate 3, a first plate 4, a last plate 5 and a plurality of plates 1 placed between the fixed plate 2 and the movable plate 3, the plurality of plates 1 being placed between the first plate and the last plate, the first plate, the last plate and the plurality of plates being clamped to form a plate bundle, and the plates adopt the plate structure of the plate heat exchanger described above. A sealing gasket 6 is installed in the sealing groove on the odd-numbered plates, the even-numbered plates are horizontally rotated 180 degrees and a sealing gasket 6 is installed in the sealing groove, and the positions of the sealing gaskets on the odd-numbered plates and the even-numbered plates are symmetrically arranged with respect to the longitudinal axis of the plates.

[0036] The specific steps for plate assembly and sealing gasket bonding are as follows:

[0037] Sealing gasket bonding steps: Divide a number of plates into two groups. The first group of plates (i.e., odd-numbered plates) are laid flat and fixed, and the sealing gaskets are bonded to their respective plate sealing grooves. The second group of plates (i.e., even-numbered plates) are rotated 180 degrees and laid flat, and then the sealing gaskets are bonded to the sealing grooves in the opposite direction of the first group, as shown in the attached figure. Figure 5 , 6 shown.

[0038] Plate assembly steps: assemble the plates with sealing gaskets glued on them in sequence and hang them on the equipment frame (Note: the first and second groups of plates are arranged and clamped in sequence to form a plate bundle, forming several cold and hot fluid interval flow channels to achieve cold and hot exchange, with a flow ratio of 1:1, see (Attachment Figure 7 ).

[0039] The following describes the structure and assembly process of the plate heat exchanger for the condition of unequal flow of hot and cold fluids:

[0040] like Figure 8-10 As shown, a plate heat exchanger with unequal flow rates of hot and cold media comprises a fixed plate 2, a movable plate 3, a first plate 4, an end plate 5 and a plurality of plates 1 placed between the fixed plate 2 and the movable plate 3, a plurality of heat exchange plates 1 are placed between the first plate 4 and the end plate 5, the first plate, the end plate and the plurality of plates are clamped to form a plate bundle, and the plates are the plate heat exchanger plates described above. The even-numbered plates in the plurality of plates 1 are installed by rotating 180 degrees horizontally on the basis of the odd-numbered plates. The plurality of plates are composed of a plurality of multi-channel plate pairs 7 and a plurality of single plates arranged alternately, the multi-channel plate pairs are composed of a plurality of plates, the sealing gaskets of the plurality of plates are installed at the same position, and the sealing gaskets of the single plate and the plate sealing gaskets 6 of the multi-channel plate pairs are installed symmetrically with respect to the longitudinal axis of the plate. In actual work, the multi-channel plate pairs are preferably composed of 2-4 plates. When the multi-channel plate pair includes two heat exchange plates, a heat exchanger with a medium flow channel ratio of 2:1 can be formed. When it includes three heat exchange plates, a heat exchanger with a medium flow channel ratio of 3:1 can be formed, and so on.

[0041] The specific steps for plate assembly and sealing gasket bonding are as follows:

[0042] Multi-channel plate pair assembly: Figure 8-10 The figure shows the case where the ratio of the cold and hot medium flow channels is 2:1. The first plate is laid flat and the sealing gasket is bonded to the plate sealing groove. The second plate is rotated 180 degrees and laid flat, and the sealing gasket is bonded to the sealing groove at the same position as the first plate to form a pair of multi-channel plates. Note: The number of plates in the multi-channel plate pair is determined according to the requirements of the cold and hot medium flow ratio. Multiple multi-channel plates are then made for use according to user requirements.

[0043] Sealing gasket bonding steps:

[0044] like Fig. 9 As shown, first lay the odd-numbered plates flat, and then lay the even-numbered plates flat after rotating them 180 degrees horizontally. The sealing gaskets of the first and second plates after the first plate are installed oppositely. The third and fourth plates are a multi-channel plate pair, and the sealing gaskets are installed in the same position and opposite to the second plate. The fifth plate is installed opposite to the sealing gaskets of the third and fourth plates. The sixth and seventh plates are a multi-channel plate pair, and the sealing gaskets are installed in the same position and opposite to the fifth plate. And so on, until the last plate.

[0045] Plate assembly steps: Alternately assemble the multi-channel plate pairs and plates with the sealing gaskets attached and hang them on the equipment frame. Fig.10As shown, the first medium flow channel is between the first plate and the first plate, the second medium flow channel is between the first and second plates, the first medium flow channel is between the second and third plates and the third and fourth plates, and so on, forming two combined plate bundles with a ratio of 2:1 of medium flow channels, which are hung on the frame and clamped to form the whole equipment. The equipment generally uses the cold side double flow channel as the main method to realize cold and heat exchange.

[0046] Due to the special design of the core component plate, the heat exchanger of this application adopts a fully open structure with convex and concave support points around the sealing groove. The left and right ends are designed to be symmetrical up and down, and the structure is completely consistent. The support points around the sealing groove are densely arranged. Under the premise of ensuring the performance of the equipment, the diversity of product circulation is achieved through different bonding combination assembly forms with the sealing gasket, which can not only meet the different flow ratio requirements of users, but also reduce resistance losses and improve heat exchange efficiency. It can also facilitate the diversity of external pipeline connections. The product appearance is neatly assembled and beautiful, without a back plate, and the qualified rate of one-time assembly is high, ensuring the appearance and internal quality. Moreover, the core component plate is pressed with only one set of molds to reduce the purchase and manufacturing cost of the equipment. Not only that, this utility model also has the advantages of novel and unique invention concept, compact and reasonable structure, stable and reliable performance, reduced process links, energy-saving and consumption-reducing production, wide range of applications, broad development prospects, and suitable for industry promotion.

[0047] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and does not deviate from the technical solution of the present invention, and designs a structure and implementation similar to the technical solution based on the above implementation examples without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A plate heat exchanger plate, characterized in that: The plate includes corner hole areas at both ends, a sealing area and a heat exchange area in the middle. The supporting points on the corner hole areas and the sealing area at both ends of the plate are symmetrically arranged with the longitudinal axis of the plate as the center, and the supporting points on the corner hole areas and the sealing area at both ends of the plate are arranged with the transverse axis of the plate as the center, and the convex and concave shapes are completely opposite.

2. A plate heat exchanger plate according to claim 1, characterized in that: The gaps between the convex and concave supporting points on both sides of the sealing groove, the first sealing groove and the second sealing groove around the plate are of the same height, and are also of the same height as the sealing groove, the first sealing groove and the second sealing groove around the plate.

3. A plate heat exchanger plate according to claim 1 or 2, characterized in that: The supporting points around the sealing groove of the plate of the plate heat exchanger are designed to be a fully open structure, and the upper and lower symmetrical structures are consistent. The sealing gasket is freely bonded on the water flow side and the sealing side and can be switched at will.

4. A plate heat exchanger, characterized in that: It comprises a fixed plate, a movable plate, a first plate, an end plate and a plurality of plates placed between the fixed plate and the movable plate, the plurality of plates are placed between the first plate and the end plate, the first plate, the end plate and the plurality of plates are clamped to form a plate bundle, the plates are the plate heat exchanger plates as described in claim 1 or 2; sealing gaskets are installed in the sealing grooves on the odd-numbered plates, the even-numbered plates are horizontally rotated 180 degrees and sealing gaskets are installed in the sealing grooves, and the positions of the sealing gaskets on the odd-numbered plates and the even-numbered plates are symmetrically arranged with respect to the longitudinal axis of the plates.

5. A plate heat exchanger with unequal flow rates of cold and hot media, characterized in that: It includes a fixed plate, a movable plate, a first plate, an end plate and a plurality of plates placed between the fixed plate and the movable plate, the plurality of plates are placed between the first plate and the end plate, the first plate, the end plate and the plurality of plates are clamped to form a plate bundle, the plates are the plate heat exchanger plates according to claim 1 or 2, the even-numbered plates among the plurality of plates are installed by horizontally rotating 180 degrees on the basis of the odd-numbered plates, the plurality of plates are composed of a plurality of multi-channel plate pairs and a plurality of single plates arranged alternately, the multi-channel plate pairs are composed of a plurality of plates, the sealing gaskets of the plurality of plates have the same installation position, the sealing gaskets of the single plate and the plate sealing gaskets of the multi-channel plate pairs are symmetrically arranged about the longitudinal axis of the plate.

6. A plate heat exchanger with unequal flow rates of cold and hot media according to claim 5, characterized in that: The multi-channel plate pair is composed of 2-4 plates.

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