Box-type laminated heat exchanger with novel inner flow channel sealing structure
By employing a closed internal flow channel structure in the box-shaped stacked heat exchanger and utilizing the interlocking of the inclined box-shaped heat exchange plates to avoid eddies, the heat exchange efficiency is improved. This solves the problem of increased flow resistance caused by eddies in existing technologies, enabling lightweight and low-cost production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 刘启春
- Filing Date
- 2024-11-22
- Publication Date
- 2026-05-22
Smart Images
Figure CN122072142A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a heat exchange structure, and more particularly to a box-type stacked heat exchanger with a novel internal flow channel sealing structure. Background Technology
[0002] The box-type stacked heat exchanger with a novel internal flow channel sealing structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on their periphery stacked sequentially. The inclined surfaces, which are individually and tightly attached to each other, form a closed internal flow channel for external sealing. Each box-type heat exchange plate has a heat exchange structure that allows for indirect heat exchange. The open external flow channel heat exchange structure has high pad structures at both ends, and the closed internal flow channel heat exchange structure has low pad structures at both ends. Both the external and internal flow channel heat exchange structures are located in the middle of each box-type heat exchange plate. Regarding the heat exchange medium undergoing indirect heat exchange, one type of heat exchange medium flows through the open external flow channel heat exchange structure, while the other type of heat exchange medium flows through the through holes in the high pads in each closed internal flow channel, forming the internal flow channel heat exchange structure. This internal flow channel heat exchange structure and the external flow channel heat exchange structure form a cross-shaped indirect heat exchange.
[0003] The prior art of a box-type stacked heat exchanger with a novel internal flow channel sealing structure has been disclosed in the patent entitled "Box-type Stacked Heat Exchanger with Open External Flow Heat Exchange Structure", patent application number 2022204815887. However, this disclosed box-type stacked heat exchanger has a drawback. In a box-type stacked heat exchanger with an open external flow heat exchange structure, the heat exchange medium flowing through the open external flow heat exchange structure is generally a gaseous or liquid heat exchange medium. When such a heat exchange medium flows through this type of open external flow heat exchange structure, it will form eddies in the inclined concave box-shaped space. Such eddies will increase the flow resistance of the heat exchange medium, thereby affecting the heat exchange efficiency of the open external flow heat exchange structure. Summary of the Invention
[0004] The main objective of this invention is to avoid and eliminate the formation of eddy currents when the heat exchange medium flows through a box-shaped stacked heat exchanger with an open external flow heat exchange structure, thereby improving the heat exchange efficiency of such box-shaped stacked heat exchangers with an open external flow heat exchange structure.
[0005] The objective of this invention is achieved through the following scheme: a box-type stacked heat exchanger with a novel internal flow channel sealing structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on their periphery, stacked sequentially. The inclined surfaces, which are individually and tightly attached to each other, form a closed internal flow channel for external sealing. Each box-type heat exchange plate has a heat exchange structure capable of indirect heat exchange. High-padded plate structures are located at both ends of the open external flow channel heat exchange structure, while low-padded plate structures are located at both ends of the closed internal flow channel heat exchange structure. Both the external and internal flow channel heat exchange structures are located in the middle of each box-type heat exchange plate. Regarding the heat exchange medium undergoing indirect heat exchange, one type of heat exchange medium flows through the open external flow channel heat exchange structure, while the other type flows through the through-holes in the high-padded plate into each closed internal flow channel, thus forming an internal flow channel heat exchange... A thermal structure, wherein the inner flow channel heat exchange structure and the outer flow channel heat exchange structure form a cross-shaped partition wall heat exchange, characterized in that the assembly structure of the two box-shaped heat exchange plates with inclined surfaces around the inner flow channel is such that one of the box-shaped heat exchange plates with inclined surfaces around its periphery has an open inclined surface structure, while the other box-shaped heat exchange plate with inclined surfaces around its periphery has a constricted inclined surface structure. These two box-shaped heat exchange plates with different inclined surface structures around their periphery are fastened together, so that the box-shaped heat exchange plate with the constricted inclined surface structure around its periphery is fastened inside the box-shaped heat exchange plate with the open inclined surface structure around its periphery. The inclined surface structure with each other fastened and the inclined surfaces tightly attached together forms a closed seal for the outer surface of the inner flow channel. After such fastening assembly and brazing sealing, a novel inner flow channel sealing structure is formed.
[0006] After the box-shaped heat exchange plate with a constricted sloping perimeter is fastened together with the box-shaped heat exchange plate with an open sloping perimeter, the outer plane of the box-shaped heat exchange plate with the constricted sloping perimeter is flush with the highest point of the open sloping perimeter of the box-shaped heat exchange plate with the open sloping perimeter.
[0007] When the box-shaped heat exchange plate with a constricted sloping perimeter is fastened together with the box-shaped heat exchange plate with an open sloping perimeter, the outer plane of the box-shaped heat exchange plate with the constricted sloping perimeter is slightly higher than the highest point of the open sloping perimeter of the box-shaped heat exchange plate.
[0008] The box-shaped heat exchange plate with an open sloping structure around its perimeter has a horizontal outward-flaring structure at the maximum sloping opening.
[0009] This invention has the following advantages and positive effects:
[0010] This internal flow channel structure, in which box-shaped heat exchange plates with constricted sloping surfaces on the periphery are fastened together with box-shaped heat exchange plates with open sloping surfaces on the periphery, can avoid and eliminate the vortex phenomenon generated by existing technologies such as "box-shaped stacked heat exchangers with open external flow heat exchange structures" in the simplest structural way.
[0011] This internal flow channel structure, which combines box-shaped heat exchange plates with constricted bevels on the periphery and box-shaped heat exchange plates with open bevels on the periphery, is lighter overall, has higher pressure resistance, is easier to assemble, has a higher brazing yield, and lower overall manufacturing and production costs compared to traditional plate-fin heat exchangers with seals. It also has better cost performance and stronger market competitiveness. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings.
[0013] Figure 1 Front view of a box-type stacked heat exchanger with a novel internal flow channel sealing structure
[0014] Figure 2 for Figure 1 AA side view
[0015] Figure 3 for Figure 1 BB cross-sectional view
[0016] Figure 4 for Figure 1 CC section view
[0017] Figure 5 for Figure 1 DD section view
[0018] Figure 6 for Figure 5 Enlarged image of the E circle
[0019] Figure 7 for Figure 6 A single magnified image of the middle 1 hour.
[0020] Figure 8 for Figure 6 A single enlarged image of 3e Detailed Implementation
[0021] The following description, in conjunction with embodiments and illustrations, provides further details;
[0022] In all the illustrations, the labels 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k all represent box-shaped heat exchange plates with an open, sloping perimeter. Figure 4The identifier 1e specifically indicates that the length of this slope is longer than the slopes 1, 1a, 1b, 1c, 1d, 1f, 1g, 1h, and 1k of other open slope structures. This is significant because it allows for the assembly and positioning of the upper cover plates 4, 4a, 4b, and 4c. Identifiers 2, 2a, and 2b all indicate the low-profile pad structures at both ends of the internal flow channel heat exchange structure. Identifiers 3, 3a, 3b, 3c, 3d, 3e, and 3f all indicate box-shaped heat exchange plates with constricted slope structures around the perimeter. Identifiers 4, 4a, 4b, and 4c all indicate the upper cover plate. Identifiers 5, 5a, 5b, 5c, and 5d all indicate an open external flow heat exchange structure. Figure 5 The marking 5d indicates an irregular structure in the open external flow heat exchange structure designed to increase heat exchange area and efficiency; markings 6, 6a, 6b, 6c, and 6d all indicate high pads located on both sides of the open external flow heat exchange structures 5, 5a, 5b, 5c, and 5d; markings 7, 7a, and 7b all indicate the lower cover plate; markings 8 and 8a both indicate the flow direction of heat exchange medium A in the internal flow channel heat exchange structure; markings 9, 9a, 9b, 9c, and 9d all indicate the internal flow channel heat exchange structure; markings 10 and 10a both indicate the flow direction of heat exchange medium B in the open external flow heat exchange structure; markings 11, 11a, and 11b all indicate the high pads 6, 6a, 6b, 6c, and 6d located on both sides of the open external flow heat exchange structure 5, 5a, 5b, 5c, and 5d. The internal channels through which heat exchange medium A flows in 6b, 6c, and 6d; markings 12, 12a, and 12b indicate small protrusions at the bottom of the high pads 6, 6a, 6b, 6c, and 6d to facilitate assembly and positioning of the high pads; markings 13, 13a, and 13b indicate small raised edges on the outer side of the upper surface of the high pads 6, 6a, 6b, 6c, and 6d; markings 14 and 14a indicate internal channels through which heat exchange medium B flows in the low pads 2, 2a, and 2b located on both sides of the internal flow channel heat exchange structures 9, 9a, 9b, 9c, and 9d; markings 15 and 15a indicate small protrusions at the bottom of the low pads 2, 2a, and 2b to facilitate assembly and positioning of the low pads. Figure 5 The identifier 16 indicates a reinforcing brazed piece existing above the open external flow heat exchange structure 5c and below the bottom plane of the box-shaped heat exchange plates 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g, which have open sloping surfaces around their perimeter. The significance of the reinforcing brazed piece 16 is to strengthen... Figure 5 The structural strength of the open external flow heat exchange structure 5c shown.
[0023] exist Figure 1 The left side shows a partial front view of the integral box-type stacked heat exchanger with an open external flow heat exchange structure, while the right side shows a partial front view of the integral box-type stacked heat exchanger with an open external flow heat exchange structure.
[0024] in Figure 1The identifier 3 indicates the outer plane of the box-shaped heat exchange plate with a constricted beveled structure after it is fastened together. This outer plane 3 is flush with the highest point of the opening of the box-shaped heat exchange plate with an open beveled structure, or the outer plane 3 is slightly higher or slightly lower than the highest point of the opening of the box-shaped heat exchange plate with an open beveled structure. Figure 1 3a in Figure 4 3b and Figure 5 The 3c in the text indicates a structure with a constricted bevel around the perimeter. It also indicates that the end of the constricted bevel has a small bevel or a small arc. The small bevel or small arc at the end of the constricted bevel is to facilitate the natural sinking of the box-shaped heat exchange plate with the constricted bevel structure after the brazing filler metal melts during the brazing process, so that the natural sinking process is not hindered by the sharp corners at the ends.
[0025] from Figure 1 6a on the left and Figure 4 6d in the middle, especially from Figure 2 As seen in 6c and 6b, these raised pads have raised edges 13, 13a, and 13b on their outer sides. The significance of these raised edges 13, 13a, and 13b is that they can be used to assemble and position the box-shaped heat exchange plates 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g, which have open and sloping structures around them. This assembly and positioning structure is beneficial for the verticality of the assembled product and also for the automated assembly by the robotic arm.
[0026] exist Figure 2 The markings 12 and 12a are shown as dashed lines. These dashed lines indicate that the small protrusion is located outside the channels 11, 11a, and 11b within the high pad, and that the small protrusion is located at the bottom of the high pads 6, 6a, 6b, 6c, and 6d. Figure 4 The identifier 12b indicates that the small protrusions 12, 12a, and 12b are inserted into the flow corner holes of the box-shaped heat exchange plates 3, 3a, 3b, and 3c with constricted bevel structures around the perimeter. Thus, the small protrusion structures 12 and 12a present at the bottom of the high plate and on the outside of the inner channels 11, 11a, and 11b are beneficial to the assembly consistency of the high plate and also to the verticality of the entire product after assembly.
[0027] exist Figure 3 The dotted line 15 indicates that the small protrusion 15 is located outside the channels 14 and 14a within the low pads 2, 2a, and 2b, and that the dotted line 15 indicates that the small protrusion is located at the bottom of the low pads 2, 2a, and 2b. Figure 4The mark 15a indicates that the small protrusion is inserted into the flow corner hole of the box-shaped heat exchange plate 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g with an open sloping structure around it. The small protrusion structure 15 and 15a at the bottom of the low plate is beneficial to the assembly consistency of the low plate and also to the verticality of the entire product after assembly.
[0028] Additionally, to demonstrate the presence of raised edges 13 on the outer surface of the high pad, in Figure 2 The high pad 6b on the left side was not viewed in section, but... Figure 2 The right side 6c shows its cross-section, and also shows the small raised edge 13a dotted line on the outer side of the upper surface of the high pad 6c. At the same time, it also shows the small protrusion 12 dotted line at the bottom of the high pad 6c to facilitate the assembly and positioning of the high pad.
[0029] In fact, it can also be Figure 1 , Figure 4 and Figure 5 The graphic description is reversed, where a box-shaped heat exchange plate with a constricted structure on the periphery is fastened to a box-shaped heat exchange plate with an open slope on the periphery. That is, the open slope is downward. Alternatively, in a single product, the open slope can be mixed and assembled with the open slope downward or the open slope upward.
[0030] Alternatively, it can also be Figure 1 , Figure 4 and Figure 5 The box-shaped heat exchange plate with a constricted structure on the periphery is placed on the outside, and the box-shaped heat exchange plate with an open beveled structure on the periphery is fastened inside the box-shaped heat exchange plate with a constricted structure on the periphery. The box-shaped heat exchange plate with a constricted beveled structure also has a horizontal outward flange structure at the constricted end face.
[0031] For the sake of simplicity in drawing the accompanying diagrams, the illustrations described in the above two paragraphs will not be included in the accompanying diagrams here.
[0032] Figure 6 for Figure 5 The enlarged image of the E-ring is for demonstration purposes. Figure 7 The slope angle α of the box-shaped heat exchange plate 1k with an open sloping structure around its perimeter is related to... Figure 8 The angle α1 of the box-shaped heat exchange plate 3f with its constricted bevel structure around the middle perimeter is equal. This ensures that the open bevel structure and the constricted bevel structure around the inner flow channel fit tightly together, guaranteeing a brazing seal on each bevel around the inner flow channel. Additionally, it can be seen from... Figure 8The 3f lead end indicates that the outer side of the constricted bevel structure is a small R-shaped arc or a small bevel angle. The purpose is to ensure that the box-shaped heat exchange plates with constricted bevel structures around the markings 3, 3a, 3b, 3c, 3d, 3e, and 3f can move smoothly and naturally downwards during the brazing process and after the brazing filler metal melts.
[0033] Finally, it should be noted that the bottom planes of the inclined surfaces forming the perimeter seal of the inner flow channel will naturally sink during brazing due to the melting of the brazing filler metal. In particular, the box-shaped heat exchange plates with constricted inclined surface structures around the perimeters of the plates marked 3, 3a, 3b, 3c, 3d, 3e, and 3f will also sink to a certain position due to the constraint of the inclined surfaces, and will remain there naturally and stably. A stable and naturally existing plate spacing of a certain height will also be formed between the box-shaped heat exchange plates with open inclined surface structures around the perimeters of the plates marked 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k. The value of this plate spacing is related to the melting rate of the brazing filler metal on each heat exchange plate. Since the box-type stacked heat exchanger with the novel internal flow channel sealing structure has only an inlet and an outlet for each internal flow channel heat exchange structure, under the premise of ensuring the brazing seal of each peripheral inclined surface of the box-type stacked heat exchanger with the novel internal flow channel sealing structure, in order to reduce costs, it can be assumed that the short pad structure at both ends of the internal flow channel heat exchange structures marked as 2, 2a, and 2b can also be eliminated.
Claims
1. A box-type stacked heat exchanger with a novel internal flow channel sealing structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on their periphery, stacked sequentially. The inclined surfaces, which are individually and tightly attached to each other, form a closed internal flow channel for external sealing. Each box-shaped heat exchange plate has a heat exchange structure capable of indirect heat exchange. The open external flow channel heat exchange structure has high-padded plate structures at both ends, and the closed internal flow channel heat exchange structure has low-padded plate structures at both ends. Both the external and internal flow channel heat exchange structures are located in the middle of each box-shaped heat exchange plate. Regarding the heat exchange medium undergoing indirect heat exchange, one type of heat exchange medium flows through the open external flow channel heat exchange structure, while the other type flows through the through-holes in the high-padded plates into each closed internal flow channel, forming the internal flow channel heat exchange structure. This internal flow channel heat exchange structure and the external flow channel heat exchange structure form a cross-shaped indirect heat exchange structure. Its characteristic is that... The assembly structure of the two box-shaped heat exchange plates with beveled edges forming the inner flow channel is as follows: one box-shaped heat exchange plate with beveled edges has an open beveled edge structure, while the other box-shaped heat exchange plate with beveled edges has a constricted beveled edge structure. These two box-shaped heat exchange plates with different beveled edge structures are fastened together, so that the box-shaped heat exchange plate with the constricted beveled edge structure is fastened inside the box-shaped heat exchange plate with the open beveled edge structure. The beveled edge structure with each other fastened and the bevels tightly attached together forms a closed seal for the outer side of the inner flow channel. After such fastening assembly and brazing sealing, a new type of inner flow channel sealing structure is formed.
2. The box-shaped stacked heat exchanger according to claim 1, characterized in that, After the box-shaped heat exchange plate with a constricted sloping perimeter structure and the box-shaped heat exchange plate with an open sloping perimeter structure are fastened together, the outer plane of the box-shaped heat exchange plate with the constricted sloping perimeter structure is flush with the highest point of the open sloping perimeter structure of the box-shaped heat exchange plate.
3. The box-shaped stacked heat exchanger according to claim 1, characterized in that, When the box-shaped heat exchange plate with a constricted sloping perimeter is fastened together with the box-shaped heat exchange plate with an open sloping perimeter, the outer plane of the box-shaped heat exchange plate with the constricted sloping perimeter is slightly higher than the highest point of the open sloping perimeter of the box-shaped heat exchange plate.
4. The box-shaped stacked heat exchanger according to claim 1, characterized in that, The box-shaped heat exchange plate with an open sloping structure around its perimeter has a horizontal outward-flaring structure at the maximum sloping opening.