Box-type laminated heat exchanger with novel inner flow channel sealing structure
By adopting a closed internal flow channel structure in the box-shaped stacked heat exchanger and utilizing the buckling and brazing sealing of the inclined box-shaped heat exchange plates, the eddy current problem is solved and the heat exchange efficiency and product performance are improved.
Patent Information
- Application Number
- CN202422864312.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In existing box-shaped stacked heat exchangers, the medium flowing through the open external circulation heat exchange structure is prone to form eddy currents, which affects the heat exchange efficiency.
A box-type stacked heat exchanger with a new internal flow channel sealing structure is used. A closed internal flow channel is formed on the box-shaped heat exchange plate. The box-shaped heat exchange plates with a peripheral inclined surface structure are buckled together to form a closed internal flow channel, and are sealed by brazing to avoid eddy currents.
It can effectively avoid eddy current phenomenon, improve heat exchange efficiency, reduce flow resistance, reduce weight, reduce production costs, improve assembly convenience and brazing yield rate, and enhance market competitiveness.
Smart Images
Figure CN223388992U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a heat exchange structure, in particular to a box-type stacked heat exchanger with a novel inner flow channel sealing structure. Background Art
[0002] The box-type stacked heat exchanger with a new internal flow channel sealing structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on the periphery, which are stacked together in sequence, and the inclined surfaces that are closely attached to each other constitute the external seal of the closed internal flow channel. Each box-type heat exchange plate is provided with a heat exchange structure for partition heat exchange. There are high pad structures at both ends of the open external flow channel heat exchange structure, and low pad structures at both ends of the closed internal flow channel heat exchange structure. The external flow channel heat exchange structure and the internal flow channel heat exchange structure are both located in the middle of each box-type heat exchange plate. Relative to the heat exchange medium for partition 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 pad and flows through each closed internal flow channel, forming an internal flow channel heat exchange structure. The internal flow channel heat exchange structure and the external flow channel heat exchange structure are cross-type partition heat exchange.
[0003] The prior art of the box-type stacked heat exchanger with a novel internal flow channel sealing structure has been disclosed in a patent entitled "Box-type stacked heat exchanger with open external circulation heat exchange structure" and patent application number 2022204815887. However, the disclosed box-type stacked heat exchanger has a defect, that is, in the box-type stacked heat exchanger with an open external circulation heat exchange structure, the heat exchange medium flowing through the open external circulation heat exchange structure is generally a gaseous heat exchange medium or a liquid heat exchange medium. When such a heat exchange medium flows through this type of open external circulation heat exchange structure, vortices will be formed in the concave box-type space flowing through the inclined surface. Such vortices will increase the flow resistance of the heat exchange medium, thereby affecting the heat exchange efficiency of the open external circulation heat exchange structure. Summary of the Invention
[0004] The main purpose of the present utility model is to avoid and eliminate the formation of vortex phenomenon when the heat exchange medium flows through the box-shaped stacked heat exchanger with an open external circulation heat exchange structure, thereby improving the heat exchange efficiency of this type of box-shaped stacked heat exchanger with an open external circulation heat exchange structure.
[0005] The purpose of the present utility model is achieved by adopting the following scheme. The box-type stacked heat exchanger with a novel inner flow channel sealing structure is composed of a plurality of box-shaped heat exchange plates with inclined surfaces on the periphery which are stacked together in sequence, and the inclined surfaces which are respectively and closely attached to each other constitute the external seal of the closed inner flow channel. There is a heat exchange structure for partition heat exchange on each box-type heat exchange plate. There are high pad structures at both ends of the open outer flow channel heat exchange structure, and low pad structures at both ends of the closed inner flow channel heat exchange structure. The outer flow channel heat exchange structure and the inner flow channel heat exchange structure are both located in the middle of each box-type heat exchange plate. With respect to the heat exchange medium for partition heat exchange, one type of heat exchange medium flows through the outer flow channel heat exchange structure which is open and circulates outside, while the other type of heat exchange medium flows through the through holes in the high pads in each closed inner flow channel to form an inner flow channel. The heat exchange structure, the inner flow channel heat exchange structure and the outer flow channel heat exchange structure are in a cross-type partition heat exchange, which is characterized in that the assembly structure of the two box-shaped heat exchange plates with inclined surfaces on the periphery forming the inner flow channel is that the peripheral inclined surface of one box-shaped heat exchange plate with inclined surfaces on the periphery has an open inclined surface structure, and the peripheral inclined surface of the other box-shaped heat exchange plate with inclined surfaces on the periphery has a necked inclined surface structure. The two box-shaped heat exchange plates with different peripheral inclined surface structures are relatively buckled together, so that the box-shaped heat exchange plate with the necked peripheral inclined surface is buckled inside the box-shaped heat exchange plate with the open peripheral inclined surface structure. The inclined surface structure that is buckled with each other and the inclined surfaces are tightly attached to each other forms an external seal of the closed inner flow channel. After such buckling assembly and brazing sealing, a new inner flow channel sealing structure is formed.
[0006] After the box-shaped heat exchange plate with a periphery having a tapered slope structure is buckled together with the box-shaped heat exchange plate with a periphery having an open slope structure, the outer plane of the box-shaped heat exchange plate with a periphery having a tapered slope structure is flush with the highest open point of the box-shaped heat exchange plate with a periphery having an open slope structure.
[0007] After the box-shaped heat exchange plate with a periphery having a contracted slope structure is buckled together with the box-shaped heat exchange plate with a periphery having an open slope structure, the outer plane of the box-shaped heat exchange plate with a periphery having a contracted slope structure is slightly higher than the highest open point of the box-shaped heat exchange plate with a periphery having an open slope structure.
[0008] The box-shaped heat exchange plate with an open inclined surface structure at the periphery has a horizontal outer flange structure at the maximum inclined surface exposure.
[0009] The utility model has the following advantages and positive effects:
[0010] This inner flow channel structure, in which a box-shaped heat exchange plate with a tapered slope structure on the peripheral slope is buckled with a box-shaped heat exchange plate with an open slope structure on the peripheral slope, can avoid and eliminate the vortex phenomenon caused by the existing technology "box-shaped stacked heat exchanger with an open external circulation heat exchange structure" in the simplest structural way.
[0011] The inner flow channel structure in which the box-shaped heat exchange plate with a tapered slope structure on the periphery is buckled with the box-shaped heat exchange plate with an open slope structure on the periphery has a lighter overall weight, higher product pressure resistance, easier assembly, higher brazing yield rate, lower overall manufacturing and production costs, better cost performance, and stronger market competitiveness compared to traditional plate-fin heat exchangers with seals. BRIEF DESCRIPTION OF THE DRAWINGS
[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 new 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 cross-sectional view
[0017] Figure 5 for Figure 1 DD cross-sectional view
[0018] Figure 6 for Figure 5 Enlarged view of circle E
[0019] Figure 7 for Figure 6 A single enlarged image of h1
[0020] Figure 8 for Figure 6 A single magnified image of 3e DETAILED DESCRIPTION
[0021] The following is further explained with reference to the embodiments and figures;
[0022] In all the figures, the symbols 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k represent box-shaped heat exchange plates with an open inclined surface structure around the periphery. Figure 4The mark 1e in the figure specifically indicates that the length of the inclined surface is longer than the inclined surfaces 1, 1a, 1b, 1c, 1d, 1f, 1g, 1h, and 1k of other open inclined surface structures. Its significance lies in that it can be used to assemble and position the upper cover plates 4, 4a, 4b, and 4c; the marks 2, 2a, and 2b all indicate the short pad structures at both ends of the internal flow channel heat exchange structure; the marks 3, 3a, 3b, 3c, 3d, 3e, and 3f all indicate box-shaped heat exchange plates with a tapered inclined surface structure around the periphery; the marks 4, 4a, 4b, and 4c all indicate the upper cover plate; the marks 5, 5a, 5b, 5c, and 5d all indicate an open external circulation heat exchange structure. Figure 5 The mark 5d in the figure indicates that the open external circulation heat exchange structure has a special-shaped structure in order to increase the heat exchange area and heat exchange efficiency; the marks 6, 6a, 6b, 6c, and 6d all indicate the high pads located on both sides of the open external circulation heat exchange structure 5, 5a, 5b, 5c, and 5d; the marks 7, 7a, and 7b all indicate the lower cover plate; the marks 8 and 8a all indicate the flow direction of the heat exchange medium A in the inner flow channel heat exchange structure; the marks 9, 9a, 9b, 9c, and 9d all indicate the inner flow channel heat exchange structure; the marks 10 and 10a all indicate the flow direction of the heat exchange medium B in the open external circulation heat exchange structure; the marks 11, 11a, and 11b all indicate the high pads 6 and 6a , 6b, 6c, 6d, the inner channel for heat exchange medium A to circulate; marks 12, 12a, 12b all indicate that there are small protrusions at the bottom of the high pads 6, 6a, 6b, 6c, 6d, which are convenient for the assembly and positioning of the high pads; marks 13, 13a, 13b indicate the raised small edges on the outer sides of the upper surfaces of the high pads 6, 6a, 6b, 6c, 6d; marks 14, 14a both indicate the inner channel for heat exchange medium B to circulate in the short pads 2, 2a, 2b on both sides of the inner flow channel heat exchange structure 9, 9a, 9b, 9c, 9d; marks 15, 15a both indicate that there are small protrusions at the bottom of the short pads 2, 2a, 2b, which are convenient for the assembly and positioning of the short pads; Figure 5 The mark 16 in the figure indicates that there is a reinforcing brazing sheet on the open external circulation heat exchange structure 5c and below the bottom plane of the box-shaped heat exchange plates 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g with an open inclined surface structure around the periphery. The significance of the reinforcing brazing sheet 16 is to strengthen the Figure 5 The structural strength of the open external circulation heat exchange structure 5c is shown.
[0023] exist Figure 1 In the figure, the left side shows a partial front section of an integral box-type stacked heat exchanger with an open external circulation heat exchange structure, and the right side shows a partial front appearance of an integral box-type stacked heat exchanger with an open external circulation heat exchange structure.
[0024] in Figure 1The mark 3 in the figure indicates the outer plane of the box-shaped heat exchange plate with a peripheral tapered structure after being fastened. The outer plane 3 is flush with the highest exposed part of the box-shaped heat exchange plate with a peripheral open tapered structure, or the outer plane 3 is slightly higher or slightly lower than the highest exposed part of the box-shaped heat exchange plate with a peripheral open tapered structure. In addition, Figure 1 3a in Figure 4 3b and Figure 5 The 3c in the figure indicates a structural form with a tapered bevel on the periphery, and also indicates that the end of the peripheral tapered bevel has a small bevel or a small arc. The purpose of having a small bevel or a small arc at the end of the peripheral tapered bevel is to facilitate the box-shaped heat exchange plate with a tapered bevel structure on the entire periphery to sink naturally after the brazing material melts during the brazing process, and the natural sinking process will not be hindered by the sharp corners of the end.
[0025] from Figure 1 6a on the left and Figure 4 6d in, especially from Figure 2 As can be seen from 6c and 6b in the figure, there are raised small edges 13, 13a, and 13b on the outside of these high pads. The significance of the existence of these raised small 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 with open inclined surface structures around them. Such an assembly and positioning structure is conducive to the verticality of the product after assembly and is also conducive to the automated assembly of the robot arm.
[0026] exist Figure 2 The marks 12 and 12a in the figure are dotted lines. The dotted lines 12 and 12a indicate that the small protrusion is outside the channels 11, 11a and 11b in the high pad, and the dotted lines 12 and 12a indicate that the small protrusion is located at the bottom of the high pad 6, 6a, 6b, 6c and 6d. Figure 4 The mark 12b in the figure indicates that the small protrusions 12, 12a, 12b are just inserted into the flow corner holes of the box-shaped heat exchange plates 3, 3a, 3b, 3c with a tapered slope structure on the periphery. In this way, the small protrusion structures 12, 12a at the bottom of the high pad and on the outside of the inner channels 11, 11a, 11b are beneficial to the assembly consistency of the high pad and also to the verticality of the entire product after assembly.
[0027] exist Figure 3 The middle mark 15 is a dotted line display, indicating that the small protrusion 15 is outside the channel 14, 14a in the short pad 2, 2a, 2b, and the dotted line 15 indicates that the small protrusion is located at the bottom of the short pad 2, 2a, 2b. Figure 4The mark 15a in the figure indicates that the small protrusion is inserted into the flow angle hole of the box-shaped heat exchange plates 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g with an open inclined surface structure on the periphery. The small protrusion structure 15 and 15a at the bottom of the short pad is conducive to the assembly consistency of the short pad and also to the verticality of the entire product after assembly.
[0028] In addition, in order to show that there is a raised edge 13 on the outer side of the high pad surface, Figure 2 The high pad 6b on the left side is not cut away. Figure 2 The right side 6c shows its cross section, and also shows that there is a raised small edge 13a dotted line on the outer side of the upper surface of the high pad 6c, and also shows that there is a small protrusion 12 dotted line at the bottom of the high pad 6c for facilitating the assembly and positioning of the high pad.
[0029] In fact, you can also Figure 1 、 Figure 4 and Figure 5 The box-shaped heat exchange plate with a tapered peripheral slope is buckled into the box-shaped heat exchange plate with an open peripheral slope, which is described in reverse, that is, the opening is downward, or in a single product, the opening can be mixed and assembled downward or upward.
[0030] In addition, you can also Figure 1 、 Figure 4 and Figure 5 The box-shaped heat exchange plate with a peripheral inclined surface having a necked structure is placed on the outside, and the box-shaped heat exchange plate with an open inclined surface structure on the peripheral inclined surface is buckled inside the box-shaped heat exchange plate with a peripheral inclined surface having a necked structure. The box-shaped heat exchange plate with a peripheral necked inclined surface structure also has a horizontal outer flange structure at the necked end surface.
[0031] For the convenience of drawing the figures, the diagrams described in the above two paragraphs are no longer drawn in the figures.
[0032] Figure 6 for Figure 5 The purpose of the enlarged view of circle E in the middle is to show that Figure 7 The bevel angle a of the box-shaped heat exchange plate 1k with an open bevel structure in the middle periphery is Figure 8 The angles a1 of the box-shaped heat exchange plates 3f with the tapered bevel structure on the middle periphery are equal, so that the open bevel structure and the tapered bevel structure around the inner flow channel can be closely attached to each other, ensuring the brazing and sealing of the bevels around the inner flow channel. Figure 8The lead end marked 3f in the middle indicates that the outer side of the end of the tapered bevel structure is a small R arc, or a small bevel angle. Its purpose is to ensure that the box-shaped heat exchange plates marked 3, 3a, 3b, 3c, 3d, 3e, and 3f with a tapered bevel structure around them can move down smoothly and naturally during the brazing process and after the brazing material melts.
[0033] Finally, it should be noted that the bottom planes of the various slopes that constitute the bevel seal around the inner flow channel will naturally sink during brazing due to the melting of the brazing material, especially the box-shaped heat exchange plates with a tapered slope structure around the edges marked 3, 3a, 3b, 3c, 3d, 3e, and 3f. Due to the constraints of the slope, the bottom planes of the box-shaped heat exchange plates with a tapered slope structure around the edges marked 3, 3a, 3b, 3c, 3d, 3e, and 3f will no longer sink after sinking to a certain position, and will naturally and stably stay there. A stable and naturally existing plate spacing with a certain height will also be formed between the box-shaped heat exchange plates with an open bevel structure around the edges marked 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k. The value of the plate spacing is related to the melting rate of the brazing material on each heat exchange plate. And because the box-type stacked heat exchanger with a new internal flow channel sealing structure has only an inlet and an outlet in each internal flow channel heat exchange structure, on the premise of ensuring the brazing seal of each peripheral inclined surface of the box-type stacked heat exchanger with a new internal flow channel sealing structure, in order to reduce costs, it can be considered that the short pad structures at both ends of the internal flow channel heat exchange structures marked as 2, 2a, and 2b can also be cancelled.
Claims
1. A box-type stacked heat exchanger with a novel inner flow channel sealing structure is composed of a plurality of box-shaped heat exchange plates with inclined surfaces on the periphery stacked together in sequence, and the inclined surfaces that are closely attached to each other form an external seal of a closed inner flow channel. Each box-type heat exchange plate is provided with a heat exchange structure for performing partition heat exchange. There are high pad structures at both ends of the open outer flow channel heat exchange structure, and low pad structures at both ends of the closed inner flow channel heat exchange structure. The outer flow channel heat exchange structure and the inner flow channel heat exchange structure are both located in the middle of each box-type heat exchange plate. For the heat exchange mediums for relative partition heat exchange, one type of heat exchange medium flows through the open outer flow channel heat exchange structure, while the other type of heat exchange medium flows through the through holes in the high pads and flows through each closed inner flow channel, forming an inner flow channel heat exchange structure. The inner flow channel heat exchange structure and the outer flow channel heat exchange structure are in a cross-type partition heat exchange, characterized in that: The assembly structure of the two box-shaped heat exchange plates with beveled peripheries that form the inner flow channel is that one of the box-shaped heat exchange plates with beveled peripheries has an open beveled structure, while the other box-shaped heat exchange plate with beveled peripheries has a necked beveled structure. The two box-shaped heat exchange plates with different beveled structures are relatively buckled together, so that the box-shaped heat exchange plate with the necked beveled structure is buckled inside the box-shaped heat exchange plate with the open beveled structure. The beveled structure that is buckled together and the beveled surfaces are tightly attached to each other forms an external seal for the closed inner flow channel. After such buckling assembly and brazing sealing, a new inner flow channel sealing structure is formed.
2. The box-type stacked heat exchanger according to claim 1, characterized in that: After the box-shaped heat exchange plate with a periphery having a tapered slope structure is buckled together with the box-shaped heat exchange plate with a periphery having an open slope structure, the outer plane of the box-shaped heat exchange plate with a periphery having a tapered slope structure is flush with the highest open point of the box-shaped heat exchange plate with a periphery having an open slope structure.
3. The box-type stacked heat exchanger according to claim 1, characterized in that: After the box-shaped heat exchange plate with a periphery having a contracted slope structure is buckled together with the box-shaped heat exchange plate with a periphery having an open slope structure, the outer plane of the box-shaped heat exchange plate with a periphery having a contracted slope structure is slightly higher than the highest open point of the box-shaped heat exchange plate with a periphery having an open slope structure.
4. The box-type stacked heat exchanger according to claim 1, characterized in that: The box-shaped heat exchange plate with an open inclined surface structure at the periphery has a horizontal outer flange structure at the maximum inclined surface exposure.