A heat exchanger with box-shaped peripheral bevel seal and different plate spacing

Abstract

A heat exchanger with a box-shaped peripheral bevel seal and different plate spacings. The heat exchanger is composed of a plurality of box-shaped peripheral bevel seals and heat exchange plates that can be stacked relatively in sequence. The periphery of each heat exchange plate has a bevel turned up in the same direction, and the bevel has a sufficient height. In the same heat exchanger, the bevel angles of each heat exchange plate are the same, and the plate thickness of each heat exchange plate is the same. In the heat exchanger, in the interlayers formed by the relative stacking of each heat exchange plate and on each heat exchange plate, there are corner holes for the circulation of heat exchange medium and heat exchange devices for interwall heat exchange. The heat exchange device is located in the middle of each heat exchange plate, and the corner holes are distributed at both ends of each heat exchange plate. It is characterized in that in the same heat exchanger, the bottom plane dimensions of each heat exchange plate with different plate spacings are different.

Description

Technical Field

[0001] The invention relates to a heat exchanger, in particular to a heat exchanger with a box-shaped peripheral bevel seal and different plate spacings. Background Art

[0002] This heat exchanger is composed of a plurality of box-shaped heat exchange plates with bevel seals on the periphery and which can be stacked relatively in sequence. The periphery of each heat exchange plate has a bevel turned up in the same direction, and the bevel has a sufficient height. In the same heat exchanger, the bevel angles of each heat exchange plate are the same, and the plate thickness of each heat exchange plate is the same. In the heat exchanger, in the interlayers formed by the relative stacking of each heat exchange plate and on each heat exchange plate, there are corner holes for the circulation of heat exchange medium and heat exchange devices for interwall heat exchange. The heat exchange device is located in the middle of each heat exchange plate, and the corner holes are distributed at both ends of each heat exchange plate.

[0003] In the same heat exchanger, the plates have the same thickness and bevel angle, are sealed by multiple box-shaped peripheral bevels and can be stacked in sequence. The internal plate spacing is often the same.

[0004] When this type of heat exchanger with the same plate spacing faces a certain heat exchange medium with a large flow rate or a small flow resistance, or faces a heat exchange medium with different properties, it has to increase the number of plates to expand the fluid cross-sectional area of ​​a certain heat exchange medium to meet its heat exchange requirements. To this end, the number of flow channel layers and the number of plates will be increased, which greatly increases the manufacturing cost of the product and increases the weight of the product.

[0005] Therefore, people have explored the use of structures with different plate spacings in the same heat exchanger. While meeting the requirements of a certain heat exchange medium flow rate or flow resistance, the number of flow channel layers and the number of heat exchange plates can be relatively reduced, thereby reducing product costs.

[0006] For this type of heat exchanger with different plate spacings, the following patents have been disclosed in the prior art:

[0007] Among them, the patent No. 2013104394987 describes a structural form with different plate thicknesses and different plate spacings, characterized in that this type of heat exchange plate has a section of inclined surface turned up in the same direction on its periphery, and the inclined surface has a sufficient height and is connected to the bottom plate of the heat exchange plate. In the same heat exchanger, the inclined surface angles of the peripheries of various heat exchange plates with different plate thicknesses are the same, and they are stacked together in sequence, thereby resulting in different spacings between the plates with different plate thicknesses, that is, different flow channel heights.

[0008] The disadvantage of the above-mentioned patent 2013104394987 is that it is necessary to prepare two or more heat exchange plates with different plate thicknesses at the same time, and the cost of raw material preparation and mold preparation is relatively high.

[0009] Another patent with the patent number of 2013104395000 describes a structural form with the same plate thickness and different plate spacing, characterized in that the periphery of the first type of heat exchange plate is a single-section flipped open slope, the slope has a certain height, and the slope angles of each heat exchange plate of the first type are the same; the periphery of the second type of heat exchange plate is composed of three flipped open sections, and the heights of the three sections are K1, K2, and K3, respectively. The first peripheral slope section with a height of K1 connected to the bottom plate of the heat exchange plate and the third peripheral slope section with a flipped top height of K3 have the same slope angle, and their slope angle values ​​are the same as those of the first type of heat exchange plate periphery slope angles. On the second type of heat exchange plate, the second peripheral section with a height of K2 between the first peripheral slope section and the third peripheral slope section is a circular arc Rt curved surface transition.

[0010] The disadvantage of the above-mentioned patent 2013104395000 is that there are two inclined surface sections with heights of K1 and K2 around the second type heat exchange plate, and a transition section with a height of K2 in the middle. After the product is assembled and brazed, due to the existence of the transition section with a height of K2, a circle of weak rings with a thickness of only one plate will appear on the peripheral inclined surfaces of all the second type heat exchange plates of the heat exchanger. The weak rings formed by the transition section with a height of K2 have weak compressive and fatigue resistance. After brazing, the total thickness of the peripheral inclined surfaces with heights of K1 and K2 in other parts is at least the thickness of two plates stacked and brazed together. Such a structure will cause the entire heat exchanger to have a low burst pressure resistance and poor fatigue resistance due to the existence of a weak ring with a height of K2 on each second type heat exchange plate, which limits the scope of use of this type of heat exchanger with the same plate thickness and different plate spacing.

[0011] In addition, manufacturing this type of heat exchanger with two different types of heat exchange plates requires two complete sets of molds, including respective blanking molds, hydraulic molds, etc., especially for the second type of heat exchange plate hydraulic mold has a higher cost and a more complicated manufacturing process. Summary of the invention

[0012] The purpose of the present invention is to eliminate the various disadvantages of the above-mentioned heat exchangers with different plate spacings. In the same heat exchanger, the same plate thickness is used, and the periphery of the heat exchange plate is a single-stage open slope, the slope has a sufficient height, and the slope angle of each heat exchange plate is the same. A plurality of such box-shaped heat exchange plates with slopes on the periphery are alternately and relatively stacked together in sequence. On the basis of ensuring that each flow channel layer of the entire heat exchanger has a high bursting pressure resistance and fatigue resistance, it has different plate spacings inside, thereby meeting different flow rates, different flow resistances, different heat exchange media and other heat exchange requirements in the same heat exchanger, and reducing manufacturing costs.

[0013] The objective of the present invention is achieved by adopting the following scheme: a heat exchanger with a box-shaped peripheral bevel seal and different plate spacings, the heat exchanger is composed of a plurality of box-shaped peripheral bevel seals and heat exchange plates that can be stacked relatively in sequence, each heat exchange plate has a bevel turned up in the same direction around the periphery, the bevel has a sufficient height, in the same heat exchanger, the bevel angles of each heat exchange plate are the same, the plate thickness of each heat exchange plate is the same, in the heat exchanger, in the interlayers formed by the relative stacking of each heat exchange plate and on each heat exchange plate, there are corner holes for the circulation of heat exchange medium and heat exchange devices for inter-wall heat exchange, the heat exchange device is located in the middle of each heat exchange plate, and the corner holes are distributed at both ends of each heat exchange plate, and it is characterized in that in the same heat exchanger, the bottom plane dimensions of each heat exchange plate with different plate spacings are different.

[0014] In the same heat exchanger, the bevel angles of the heat exchange plates are the same, the plate thickness of the heat exchange plates is the same, and this type of heat exchanger with two different plate spacings is composed of two heat exchange plates with different bottom plane sizes stacked together in sequence and alternately.

[0015] In the same heat exchanger, the bevel angles of the heat exchange plates are the same, the plate thicknesses of the heat exchange plates are the same, and this type of heat exchanger with a variety of different plate spacings is composed of a variety of heat exchange plates with different bottom plane sizes stacked together in sequence and alternately.

[0016] In the same heat exchanger, the bevel angles of the heat exchange plates are the same, and the plate thicknesses of the heat exchange plates are the same. When heat exchange plates with the same bottom plane size are stacked together to form a group, the heat exchange plates will have the same plate spacing.

[0017] In the same heat exchanger, various heat exchange plates with two or more different plate spacings, as well as various heat exchange plates with the same bevel angle, the same plate thickness, and different bottom plane sizes described by two or more different plate spacings can form various multi-channel and multi-flow heat exchange structures inside the heat exchanger by changing different corner hole connection structures.

[0018] The present invention has the following advantages and positive effects

[0019] 1. When facing different heat exchange media, the heat exchanger with the same plate thickness, the same bevel angle of each heat exchange plate, and two or more different plate spacings can use the flow layers with larger plate spacings to circulate the heat exchange media with larger flow or smaller flow resistance. Compared with the heat exchanger with the same plate spacing, the number of heat exchange plates can be relatively reduced while meeting the flow requirements and the flow resistance requirements, thereby reducing the product manufacturing cost.

[0020] 2. This type of heat exchanger has the same plate thickness, each heat exchange plate has the same bevel angle, and has two or more different plate spacing structures. Its bursting pressure resistance and fatigue resistance are higher, and the bursting pressure resistance and fatigue resistance values ​​between each layer and each flow channel are the same.

[0021] 3. This type of heat exchanger has the same plate thickness, each heat exchange plate has the same bevel angle, and has two or more different plate spacing structures. It only needs to stock one thickness of plate, and its manufacturing and material management costs are relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings;

[0023] Figure 1 Schematic diagram of the assembly of two different plate spacings with the same plate thickness and the same bevel angle

[0024] Figure 2 Figure 1 A cross-sectional diagram of a heat exchange plate

[0025] Figure 3 Figure 1 Another cross-sectional diagram of a heat exchange plate

[0026] Figure 4 Figure 1 A cross-sectional diagram of a heat exchange plate stack with the same plate spacing

[0027] Figure 5 Figure 1 Another cross-sectional diagram of stacked heat exchange plates with the same plate spacing

[0028] Figure 6 Schematic diagram of the assembly section with five different plate spacings for the same plate thickness and the same bevel angle

[0029] Figure 7 Pick Figure 6 Schematic diagram of the assembly of two different structures of plates with different plate spacing combinations

[0030] Figure 8 Pick Figure 6 Schematic diagram of the assembly of two different structures of plates with different plate spacing combinations

[0031] Fig. 9 Pick Figure 6 Schematic diagram of the assembly of two different structures of plates with different plate spacing combinations

[0032] Fig.10 Pick Figure 6Schematic diagram of the assembly of three different structures of plates with different plate spacing combinations

[0033] Fig.11 Pick Figure 6 Schematic diagram of the assembly of three different structures of plates with different plate spacing combinations DETAILED DESCRIPTION

[0034] The following is a further description with reference to the embodiments and drawings.

[0035] Figure 1 It shows that the heat exchange plates 1 and 2 have the same plate thickness t and the same bevel angle a, and are assembled by relative alternating stacking, but have two different plate spacings h1 and h2. In order to show the two heat exchange plates 1 and 2 with different bottom plane dimensions A and B, Figure 1 The heat exchange plate 1 in the figure is represented by a dotted line, and the heat exchange plate 2 is represented by a solid line.

[0036] exist Figure 2 and Figure 3 In the embodiment, the heat exchange plates 1 and 2 have the same plate thickness t and the same bevel angle a. The difference between them is that the bottom plane size A of the heat exchange plate 1 is different from the bottom plane size B of the heat exchange plate 2. Therefore, after the heat exchange plates 1 and 2 are alternately stacked in sequence, Figure 1 Different plate spacings h1 and h2 are shown.

[0037] Figure 1 In the figure, the heat exchange plate combination and heat exchanger with different bottom plane dimensions A and B of the heat exchange plates 1 and 2 can be represented by set plate spacing values ​​h1 and h2 and in sequence in the form of drawings.

[0038] Figure 4 The heat exchange plates in the figure are all heat exchange plates 1, with the same plate thickness t, the same bevel angle a, and the bottom plane dimensions A of the mutually stacked heat exchange plates are the same, so in Figure 4 The structure with the same plate spacing h3 is shown.

[0039] Figure 5 The heat exchange plates in the figure are all heat exchange plates 2, with the same plate thickness t, the same bevel angle a, and the bottom plane size B of the stacked heat exchange plates is the same, so in Figure 5 A structure with the same plate spacing h4 is shown.

[0040] Figure 6It shows that the heat exchange plates 3, 4, 5, 6, 7 have the same plate thickness t1 and the same bevel angle a1, and are stacked and assembled in sequence, but have five different plate spacings, namely H1, H2, H3, H4, and H5. In order to show the cross-sectional structures of five different heat exchange plates 3, 4, 5, 6, and 7, Figure 6 The heat exchange plates 3, 4, 5, 6, 7 in the figure are represented by solid lines and various dotted lines respectively.

[0041] Reference Figure 2 and Figure 3 It can also be understood that in the same heat exchanger, under the premise of having the same plate thickness t1 and the same bevel angle a1, Figure 6 There can be five obviously different plate spacings, such as H1, H2, H3, H4, and H5, because the heat exchange plates 3, 4, 5, 6, and 7 have different bottom plane dimensions G, D, E, F, and C. These different bottom plane dimensions can be expressed in the form of drawings by setting the plate spacing values ​​H1, H2, H3, H4, and H5 in sequence.

[0042] Figure 7 Indicated the use Figure 6 The heat exchange plates 4 and 7 are alternately stacked to form a heat exchange plate assembly and a heat exchanger, wherein the heat exchange plates 4 and 7 have the same plate thickness t1, the same bevel angle a1, and Figure 7 It is respectively marked that the bottom plane size C of the heat exchange plate 7 is different from the bottom plane size D of the heat exchange plate 4, indicating that the heat exchange plates 4 and 7 with different bottom plane sizes can be relatively alternately stacked and assembled into different plate spacing H6 and H7 combinations.

[0043] Figure 8 Indicated the use Figure 6 The heat exchange plates 5 and 6 are alternately stacked relative to each other to form a heat exchange plate assembly and a heat exchanger, wherein the heat exchange plates 5 and 6 have the same plate thickness t1, the same bevel angle a1, and Figure 8 It is respectively marked that the bottom plane size F of the heat exchange plate 6 is different from the bottom plane size E of the heat exchange plate 5, indicating that the heat exchange plates 5 and 6 with different bottom plane sizes can be relatively alternately stacked and assembled into different plate spacing H8 and H9 combinations.

[0044] Fig. 9 Indicated the use Figure 6 The heat exchange plates 3 and 7 are alternately stacked to form a heat exchange plate assembly and a heat exchanger, wherein the heat exchange plates 3 and 7 have the same plate thickness t1, the same bevel angle a1, and Fig. 9 It shows that the bottom plane dimension G of the heat exchange plate 3 is different from Figure 7The bottom plane size C of the heat exchange plate 7 is shown in FIG. 1 . The two heat exchange plates 3 and 7 with different bottom plane sizes can be alternately stacked and assembled into two different plate spacing combinations H10 and H11.

[0045] Figure 7 , 8 , 9 indicates Figure 6 The heat exchange plates 7, 4, 5, 6, 3 having the same plate thickness t1 and the same bevel angle a1 but different bottom plane sizes C, D, E, F, G can be stacked alternately with two heat exchange plates of different bottom plane sizes at will according to requirements to form an arrangement and combination structure with various different plate spacings, and can also form various heat exchangers with different plate spacings.

[0046] Reference Figure 4 and Figure 5 , it can be considered Figure 6 The heat exchange plates 3, 4, 5, 6, 7 can also be made of heat exchange plates with the same bottom plane size, which can be stacked and assembled into various heat exchange plate combinations and heat exchangers with the same internal plate spacing.

[0047] Fig.10 Indicated the use Figure 6 The heat exchange plates 3, 5, and 6 are alternately stacked to form a heat exchange plate assembly and a heat exchanger, wherein the heat exchange plates 3, 5, and 6 have the same plate thickness t1, the same bevel angle a1, and are Fig.10 The bottom plane dimension F of the heat exchange plate 6 is shown in Figure 8 The bottom plane size F of the heat exchange plate 6 shown in the figure is the same. The three heat exchange plates 3, 5, 6 with different bottom plane sizes G, E, F can be relatively alternately stacked to assemble three different plate spacing combinations and heat exchangers of H9, H12, H13.

[0048] Fig.11 Indicated the use Figure 6 The heat exchange plates 4, 6, 7 are alternately stacked to form a heat exchange plate assembly and a heat exchanger, wherein the heat exchange plates 4, 6, 7 have the same plate thickness t1, the same bevel angle a1, and are Fig.11 The bottom plane dimension D of the heat exchange plate 4 is shown in Figure 7 The bottom plane size D of the heat exchange plate 4 shown in the figure is the same. The three heat exchange plates 4, 6, 7 with different bottom plane sizes D, F, C can be relatively alternately stacked to assemble three different plate spacing combinations and heat exchangers, namely H7, H14, and H15.

Claims

1. A heat exchanger with a box-shaped peripheral bevel seal and different plate spacings, the heat exchanger is composed of a plurality of box-shaped peripheral bevel seals and heat exchange plates that can be stacked relatively in sequence, each heat exchange plate has a bevel turned up in the same direction around the periphery, the bevel has a sufficient height, in the same heat exchanger, the bevel angle of each heat exchange plate is the same, the plate thickness of each heat exchange plate is the same, in the heat exchanger, the interlayers formed by the relative stacking of each heat exchange plate and on each heat exchange plate, there are corner holes for the flow of heat exchange medium and heat exchange devices for interwall heat exchange, the heat exchange devices are located in the middle of each heat exchange plate, and the corner holes are distributed at both ends of each heat exchange plate, characterized in that, In the same heat exchanger, the bottom plane dimensions of the heat exchange plates with different plate spacings are different.

2. The heat exchanger according to claim 1, characterized in that: In the same heat exchanger, the bevel angles of the heat exchange plates are the same, the plate thicknesses of the heat exchange plates are the same, and this type of heat exchanger with a variety of different plate spacings is composed of a variety of heat exchange plates with different bottom plane sizes stacked together in sequence and alternately.

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