Box-shaped laminated heat exchanger with partition plates in external circulation heat exchange structure
By adding baffles and support structures to the open external flow heat exchange structure, the eddy current problem was solved, the heat exchange efficiency was improved, the flow noise was reduced, and the assembly process was simplified.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 刘启春
- Filing Date
- 2024-10-18
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the heat exchange medium in open external flow heat exchange structures is prone to forming eddies, which leads to increased flow resistance and affects heat exchange efficiency.
In an open external flow heat exchange structure, a baffle is added, and a corrugated structure and a support structure are set on the baffle. The welded seal and flow guiding structure between the baffle and the heat exchange plate are used to avoid the generation of eddy currents.
It effectively reduces flow resistance, improves heat exchange efficiency, reduces flow noise, simplifies the assembly process, and reduces product weight and cost.
Smart Images
Figure CN121898181A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a heat exchange structure, and more particularly to a box-shaped stacked heat exchanger with a partition in an external flow heat exchange structure. Background Technology
[0002] A box-shaped stacked heat exchanger with baffles in an external flow heat exchange structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on their perimeter, stacked sequentially. The inclined surfaces, which are individually and tightly attached to each other, form a closed internal flow channel that is sealed to the outside. Each box-shaped 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-shaped heat exchange plate. For 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 box-shaped stacked heat exchangers with baffles in the external flow heat exchange structure has been disclosed in the patent entitled "Box-shaped Stacked Heat Exchanger with Open External Flow Heat Exchange Structure", patent application number 2022204815887. However, such disclosed box-shaped stacked heat exchangers have a drawback. In box-shaped stacked heat exchangers with open external flow heat exchange structures, the heat exchange medium flowing through the open external flow heat exchange structure is generally a gaseous heat exchange medium or a liquid heat exchange medium. When such heat exchange medium flows through such open external flow heat exchange structures, 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 reduce and eliminate the generation of eddy currents in heat exchangers with open external flow heat exchange structures, thereby improving the heat exchange efficiency of such box-shaped stacked heat exchangers.
[0005] The objective of this invention is achieved through the following scheme: a box-shaped stacked heat exchanger with baffles in the external flow heat exchange 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 with an external seal. Each box-shaped 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, and 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-shaped heat exchange plate, relatively separated. The heat exchange medium in the wall heat exchanger consists of two types: one type flows through an open external flow channel heat exchange structure, and the other type flows through through holes in a high plate in various closed internal channels, forming an 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 wall heat exchange. The key feature is that a baffle is added at the bottom of the open external flow heat exchange structure. The baffle is laid flat on a box-shaped space formed by an inwardly concave inclined surface, allowing the heat exchange medium flowing through the open external flow heat exchange structure to flow smoothly and preventing the generation of eddies.
[0006] To enhance the strength of the partition itself, it has a corrugated structure.
[0007] To support the partition, there is a finned support structure beneath the partition in the box-shaped space formed by the concave slope.
[0008] To support the partition, there is a support structure made of pads under the partition in the box-shaped space formed by the inward concavity of the sloping surface.
[0009] To prevent the heat exchange medium from flowing into the box-shaped space formed by the inclined and concave surfaces, there are steps around the outer perimeter of the high plate to facilitate welding and sealing of the partition.
[0010] To prevent the heat exchange medium from flowing into the box-shaped space formed by the inclined concave surface, a welded sealing structure is provided around the perimeter where the partition plate and the high pad plate come into contact.
[0011] To prevent the heat exchange medium from flowing into the box-shaped space formed by the inclined concave surface, there is a flow guiding structure around the partition.
[0012] To enhance the strength of the partition and to prevent the heat exchange medium from flowing into the box-shaped space formed by the inwardly recessed slope, the perimeter of the partition is welded and sealed together with the horizontal flange at the top of the slope of the box-shaped heat exchange plate.
[0013] This invention has the following advantages and positive effects:
[0014] Adding baffles to an open external flow heat exchange structure can prevent and eliminate eddy currents in the heat exchange medium flowing through it, thereby reducing the flow resistance and making the heat exchange structure more efficient and practical.
[0015] The baffle has the function of guiding the heat exchange medium flowing through the open external heat exchange structure.
[0016] Because the perimeter of the partition is welded and sealed together with the horizontal flange at the top of the slope, and the perimeter of the partition that contacts the high plate is welded and sealed together, coupled with the flow guiding structure and flow guiding function of the partition, this not only strengthens the welding strength and stability of the high plate, but also prevents and eliminates the flow of heat exchange medium into the box-shaped space formed by the concave slope, thereby reducing the flow noise of heat exchange medium flowing through the open external flow heat exchange structure.
[0017] This type of novel heat exchange structure with baffles and open external circulation, as well as its novel box-type stacked heat exchanger, greatly simplifies the assembly process and reduces product weight and cost because it no longer requires various sealing strips for welding. It can replace most of the aluminum plate fin heat exchangers with sealing strips that are currently manufactured using vacuum welding. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] Figure 1 A front view of a box-type stacked heat exchanger with baffles in an open external flow heat exchange structure.
[0020] Figure 2 for Figure 1 EE cross-section
[0021] Figure 3 for Figure 1 DD cross-section
[0022] Figure 4 for Figure 1 CC cross-section
[0023] Figure 5 for Figure 1 BB cross section
[0024] Figure 6 for Figure 1 AA section diagram Detailed Implementation
[0025] The following description, in conjunction with embodiments and illustrations, provides further details;
[0026] In all the illustrations, labels 1, 1a, 1b, and 1c all represent long, sloping box-type heat exchange plates; labels 2, 2a, 2b, 2c, 2d, and 2e all represent open-type external flow heat exchange structures, and also represent open-type external flow heat exchange structures above partitions 5, 5a, 5b, 5c and 15, 15a. Figure 22b and 2c represent a certain irregular open external flow heat exchange structure, the purpose of which is to increase the heat exchange area and heat exchange efficiency; labels 3, 3a, and 3b all indicate the flow direction of heat exchange medium A, which performs indirect heat exchange in the internal flow channel; labels 4, 4a, and 4b all indicate the fins supporting the partitions, and also indicate the fins supporting partitions 5, 5a, 5b, and 5c in the inclined concave box-shaped space formed by short inclined box-shaped heat exchange plates 6, 6a, 6b, and 6c, and in the lower part of partitions 5, 5a, 5b, and 5c; labels 5, 5a, 5b, and 5c all indicate partitions, and also indicate partitions laid flat on the box-shaped space formed by the inclined concave surface, and at the bottom of partitions with open external flow heat exchange structures 2, 2a, 2b, 2c, 2d, and 2e. The designation 5 indicates a shorter partition plate laid between high pads 8, 8a, 8b, 8c, 8d, and 8e. Designations 5a and 5c indicate that high pads 8, 8a, 8b, 8c, 8d, and 8e pass through partitions 5a and 5c. It also indicates that partitions 5a and 5c will be welded to the horizontal flanges at the top of the short, sloping box-type heat exchange plates 6, 6a, 6b, and 6c. Furthermore, it indicates that partitions 5a and 5c have flow-guiding structures 10, 10a, 10b, and 10c around their perimeter. Partition 5b indicates that the partition plate may not contact the horizontal flanges at the top of the short, sloping box-type heat exchange plates 6, 6a, 6b, and 6c, and there will be a gap h between partition 5b and the horizontal flanges at the top of the short, sloping box-type heat exchange plates 6, 6a, 6b, and 6c. Designations 6, 6a, 6b, and 6c... All of these indicate short-sloped box-type heat exchange plates, or short-sloped box-type heat exchange plates stacked on top of long-sloped box-type heat exchange plates 1, 1a, 1b, and 1c, sealed together with the slopes of the long-sloped box-type heat exchange plates 1, 1a, 1b, and 1c to form an inner flow channel; 7 and 7a both indicate that the outer periphery of high pads 8, 8a, 8b, 8c, 8d, and 8e has steps for welding and sealing partitions 5a, 5b, 5c, 15, and 15a; 8, 8a, 8b, 8c, 8d, and 8e both indicate high pads with through holes 17 and 17a located on both sides of open external flow heat exchange structures 3, 3a, and 3b; 9, 9a, 9b, and 9c indicate partitions 5a, 5c, and 15a and high pads 8, 8a, 8b, 8c, and 8d. 8e has a welded sealing structure around its periphery; markings 10, 10a, 10b, and 10c all indicate flow guiding structures around partitions 5a, 5c, 15, and 15a; markings 11 and 11a both indicate short pads in the inner flow channels; marking 12 indicates the flow direction of heat exchange medium A flowing in the inner channels 17 and 17a of high pads 8, 8a, 8b, 8c, 8d, and 8e; markings 13, 13a, and 13b both indicate the heat exchange structure of the inner flow channels; markings 14, 14a, 14b, and 14c all indicate pads, and also indicate pads supporting partitions 5, 5a, 5b, and 5c in the inclined concave box-shaped space formed by short inclined box-shaped heat exchange plates 6, 6a, 6b, and 6c, and at the lower part of partitions 5, 5a, 5b, and 5c.Indications 15 and 15a indicate partitions with corrugated reinforcement structures. Indication 15 indicates that the partition with corrugated reinforcement structure is single-layered, while indication 15a indicates that the partition with corrugated reinforcement structure is double-layered. The bottom corrugated partition is for strengthening the partition, and the flat partition on top is for welding to the bottom corrugated partition and to the open external flow heat exchange structures 3, 3a, 3b above the partitions 5, 5a, 5b, 15, 15a. Indications 16 and 16a both indicate the flow direction of the heat exchange medium B in the open external flow heat exchange structures 3, 3a, 3b. Indications 17 and 17a both indicate the internal channels in the high pads 8, 8a, 8b, 8c, 8d, 8e. Figure 2 The identifier 18 indicates a reinforcing brazed piece present on the open external flow heat exchange structures 2, 2a, 2b, 2c, 2d, and 2e, and below the bottom plane of the long inclined box-shaped heat exchange plates 1, 1a, 1b, and 1c. The significance of the reinforcing brazed piece 18 is to strengthen... Figure 2 The structural strength of the open external flow heat exchange structure 2b shown.
[0027] exist Figure 1 The left side shows a partial front view of the integral box-type stacked heat exchanger with a partitioned, open external flow heat exchange structure, while the right side shows a partial front cross-section of the integral box-type stacked heat exchanger with a partitioned, open external flow heat exchange structure.
[0028] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that above the partitions 5, 5a, 5b, 5c and 15, 15a, there are open external flow channel heat exchange structures 3, 3a, 3b and their heat exchange medium B with a flow direction 16. It can be found that the heat exchange medium B, which has a cross-shaped heat exchange structure with the heat exchange medium A, will flow smoothly above the partitions 5, 5a, 5b, 5c, 15, 15a. Due to the presence of the partitions 5, 5a, 5b, 5c, 15, 15a, the heat exchange medium B will no longer be drawn into the concave space with short inclined surfaces, nor will it cause eddy currents in the heat exchange medium B.
[0029] Figure 3 for Figure 1 The DD cross-section, which is also a cross-section of all internal flow channel heat exchange structures 13, 13a, and 13b, clearly shows the flow direction of heat exchange medium A in the internal flow channel heat exchange structures 13, 13a, and 13b, and also shows that there are short pads 11 and 11a on both sides of the internal flow channel heat exchange structures 13, 13a, and 13b. Figure 3 yes Figure 1 DD section, Figure 3 The projection of the box-shaped component should be represented as box-shaped heat exchange plates 1, 1a, 1b, and 1c with long inclined surfaces.
[0030] Figure 4 for Figure 1 The CC section, which is also a section of the space below all partitions 5, 5a, 5b, and 5c, clearly shows that no heat exchange medium B flows below partitions 5, 5a, 5b, 5c, 15, and 15a. Fins 4, 4a, and 4b exist in the space below partitions 5, 5a, 5b, and 5c to support the partitions, as well as pads 14, 14a, 14b, and 14c to support partitions 5, 5a, 5b, and 5c. Alternatively, corrugated partitions 15 and 15a may exist. It also shows that high pads 8c are present at both ends of partition 5, or that high pads 8, 8a, 8b, 8c, and 8e pass through partitions 5a, 5b, 5c, 15, and 15a. Because... Figure 4 yes Figure 1 CC section, Figure 4 The projection of the box-shaped components should be represented as box-shaped heat exchange plates 6, 6a, 6b, and 6c with short bevels.
[0031] Figure 5 for Figure 1 The BB section, which is also a section of all open-type novel external flow channel heat exchange structures 2, 2a, 2b, 2c, 2d, and 2e, clearly shows the flow direction 16, 16a of the heat exchange medium B in the external flow channel heat exchange structures 3, 3a, and 3b. Due to the presence of baffles 5, 5a, 5b, 5c, 15, and 15a, it can be considered that the heat exchange medium B can flow smoothly through the open-type external flow channel heat exchange structures 3, 3a, and 3b. It also shows that there are high pads 8, 8a, 8b, 8c, 8d, and 8e on both sides of the open-type novel external flow channel heat exchange structures 3, 3a, and 3b. Figure 5 yes Figure 1 BB cross section, Figure 5 The projection of the box-shaped components should be represented as box-shaped heat exchange plates 6, 6a, 6b, and 6c with short bevels.
[0032] Figure 6 for Figure 1 Section AA, which is also a section of the space below all partitions 5, 5a, 5b, and 5c, clearly shows that no heat exchange medium B flows below partitions 5, 5a, 5b, 5c, 15, and 15a. Several pads 14, 14a, 14b, and 14c exist in the space below partitions 5, 5a, 5b, and 5c to support them. Figure 6 yes Figure 1 AA section, Figure 6The projection of the box-shaped components should be represented as box-shaped heat exchange plates 6, 6a, 6b, and 6c with short bevels.
[0033] Finally, it should be noted that the bottom planes of the inclined surfaces forming the perimeter seal of the closed internal flow channels will naturally sink during brazing due to the melting of the brazing filler metal. This is especially true for the short inclined box-type heat exchange plates marked 6, 6a, 6b, and 6c. Due to the constraint of the inclined surfaces, the bottom planes of these plates will sink to a certain position and then remain there naturally and stably. Similarly, a stable and naturally existing plate spacing of a certain height will be formed between the long inclined box-type heat exchange plates marked 1, 1a, 1b, and 1c. The value of this plate spacing is related to the melting rate of the brazing filler metal on each heat exchange plate. Furthermore, since the box-type stacked heat exchanger with baffles in the external flow heat exchange structure only has an inlet and an outlet for each closed internal flow channel heat exchange structure, to reduce costs while ensuring the brazing seal of the perimeter inclined surfaces of each closed internal flow channel, the short pads in the internal flow channels marked 11 and 11a can be considered unnecessary.
Claims
1. A box-shaped stacked heat exchanger with baffles in its external flow heat exchange structure is composed of multiple box-shaped heat exchange plates with inclined surfaces on their perimeter, stacked sequentially. The inclined surfaces, which are individually and tightly attached to each other, form a closed internal flow channel that is sealed externally. 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 an 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... At the bottom of the open external flow heat exchange structure, a baffle is added. The baffle is laid flat on the box-shaped space formed by the inward concavity of the slope, so that the heat exchange medium flowing through the open external flow heat exchange structure can flow smoothly and prevent the generation of eddy currents.
2. The box-shaped stacked heat exchanger according to claim 1, characterized in that, The partition has a corrugated structure.
3. The box-shaped stacked heat exchanger according to claim 1, characterized in that, In the box-shaped space formed by the concave slope, there is a supporting structure made of fins below the partition.
4. The box-shaped stacked heat exchanger according to claim 1, characterized in that, In the box-shaped space formed by the concave slope, there is a support structure made of pads under the partition.
5. The box-shaped stacked heat exchanger according to claim 1, characterized in that, There are steps around the outer perimeter of the high pad to facilitate welding and sealing of the partition.
6. The box-shaped stacked heat exchanger according to claim 1, characterized in that, The perimeter where the partition plate contacts the high pad has a welded sealing structure.
7. The box-shaped stacked heat exchanger according to claim 1, characterized in that, There are flow guiding structures around the partition.
8. The box-shaped stacked heat exchanger according to claim 1, characterized in that, The perimeter of the partition plate will be welded and sealed together with the horizontal flange at the top of the inclined surface of the box-shaped heat exchange plate.