Heat exchange unit and heat exchanger

Abstract

The application discloses a heat exchange unit and a heat exchanger, which comprise a first heat exchange plate, the first heat exchange plate comprising a first heat exchange part and first connecting parts connected to two sides of the first heat exchange part, the first connecting parts comprising first bending sections; and a second heat exchange plate, the second heat exchange plate comprising a second heat exchange part and second connecting parts connected to two sides of the second heat exchange part, the second connecting parts comprising second bending sections; wherein the first bending sections abut the inner side surfaces of the second bending sections, and the first heat exchange part and the second heat exchange part have a spacing to form a heat exchange channel. The abutment of the first bending sections and the second bending sections forms a guiding sliding structure, so that one end of any heat exchange plate can be quickly pushed along the corresponding bending section to realize quick connection and positioning before the first heat exchange plate and the second heat exchange plate are connected and positioned, the subsequent connection is facilitated, and the efficiency of assembly and production is improved.

Description

Technical Field

[0001] This application relates to the technical field of heat exchangers, and in particular to a heat exchanger and a heat exchanger unit. Background Technology

[0002] Stenter machines are widely used in the textile printing and dyeing industry, enabling the drying and setting of fabrics. The high-temperature exhaust gas generated during the stenter's operation is discharged after passing through an exhaust gas treatment device. Currently, to utilize the heat energy of the exhaust gas generated in the stenter, a waste heat recovery device is typically connected to the waste gas discharge pipeline. This device contains a heat exchanger, which first cools the exhaust gas. Simultaneously, fresh air entering the waste heat recovery device is heated using the heat from the exhaust gas itself. This heated fresh air is then introduced into the stenter, achieving energy savings.

[0003] The heat exchanger in a waste heat recovery device is generally composed of multiple heat exchange units. For example, the invention with publication number CN104406436A discloses "an energy-saving plate heat exchanger", which includes a heat exchange core. The heat exchange core is composed of multiple heat exchange plates stacked and connected to each other. In the actual connection process, the heat exchange plates are generally sheet metal parts. The connection is achieved by welding the folded edges of the outer edges of two heat exchange plates together. The main body of the two heat exchange plates has a gap to form an air channel.

[0004] In the above structure, the welding connection of the two heat exchange plates requires the upper and lower folded edges to be aligned. However, in actual operation, the manual alignment of the upper and lower folded edges takes a certain amount of time and there is also a certain alignment error, which affects production efficiency and product quality. Utility Model Content

[0005] To facilitate rapid assembly and positioning of two heat exchangers before connection and improve production efficiency, the primary objective of this application is to provide a heat exchange unit.

[0006] The heat exchange unit provided in this application adopts the following technical solution:

[0007] A heat exchange unit, comprising:

[0008] A first heat exchange plate, the first heat exchange plate including a first heat exchange section and a first connecting section connecting both sides of the first heat exchange section, the first connecting section including a first bent section; and

[0009] The second heat exchange plate includes a second heat exchange section and a second connecting section connecting both sides of the second heat exchange section. The second connecting section includes a second bending section.

[0010] The first bending section abuts against the inner side of the second bending section, and there is a gap between the first heat exchange section and the second heat exchange section to form a heat waste channel.

[0011] Preferably, the first bending segment includes a first inclined segment and a second inclined segment with a certain angle; the second bending segment includes a third inclined segment and a fourth inclined segment with a certain angle, the first inclined segment and the third inclined segment abutting each other, and the second inclined segment and the fourth inclined segment abutting each other.

[0012] Preferably, the first connecting portion further includes an extension section connected to the end of the first bent section; the second connecting portion further includes a fifth inclined section connected to the end of the second bent section, the extension section abutting against the inner surface of the fifth inclined section.

[0013] Preferably, the second connecting portion further includes an adjusting section, which connects the fifth inclined section and the second heat exchange portion.

[0014] Preferably, the first connecting portion further includes a flange connecting the first heat exchange portion and the first bending section; the second connecting portion further includes a flange extending outward from one end of the second bending section, the flange abutting against the upper end face of the flange.

[0015] Preferably, both the first heat exchange section and the second heat exchange section include:

[0016] The first heat exchange section has multiple sections arranged at intervals; and

[0017] The second heat exchange section is located between two adjacent first heat exchange sections;

[0018] The first heat exchange section includes a plurality of convex portions arranged at intervals, and the second heat exchange section includes a plurality of concave portions arranged at intervals.

[0019] Preferably, the recess is located between two adjacent protrusions.

[0020] Preferably, the first heat exchange section further includes a first arc-shaped section connecting two adjacent protrusions; the second heat exchange section further includes a second arc-shaped section connecting two adjacent concave portions; wherein the first arc-shaped section is concave and the second arc-shaped section is convex.

[0021] Preferably, the first heat exchange section further includes an arc-shaped groove, which is formed on the protrusion; the second heat exchange section further includes a rib, which protrudes upward from the end face of the concave portion.

[0022] To facilitate rapid assembly and positioning of two heat exchangers before connection and improve production efficiency, the second objective of this application is to provide a heat exchange unit.

[0023] The heat exchange unit provided in this application adopts the following technical solution:

[0024] A heat exchanger includes at least two of the heat exchange units, with adjacent heat exchange units having a spacing to form a fresh air passage.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. A guiding sliding structure is formed by the contact between the first and second bending sections. Before the first and second heat exchange plates are connected and positioned, one end of any heat exchange plate can be quickly pushed in along the corresponding bending section to achieve rapid connection and positioning, which facilitates subsequent connection and improves the efficiency of assembly and production. At the same time, combined with the contact between the extension section and the fifth inclined section, the first and second connecting parts form a labyrinth-like sealing structure, which improves the sealing of both sides of the heat waste channel formed after the two heat exchange plates are connected, and reduces the possibility of heat waste overflowing from the connection position into the fresh air channel during the cooling process.

[0027] 2. By setting several intervals of protrusions and concave parts in the first heat exchange section and the second heat exchange section, the heat exchange area of ​​the waste heat channel and the fresh air channel is increased. At the same time, the grooves opened on the protrusions and the ribs of the concave parts are combined to further increase the heat exchange area and enhance the heat exchange effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the heat exchange unit in Example 1;

[0029] Figure 2 This is an exploded view of a heat exchange unit according to an embodiment;

[0030] Figure 3 This is a cross-sectional view of the heat exchange unit in Example 1;

[0031] Figure 4 This is a schematic diagram showing the first connecting part and the second connecting part in action, as illustrated in Embodiment 1.

[0032] Figure 5 This is a schematic diagram showing the arrangement and structure of the first heat exchange section and the second heat exchange section in Embodiment 1;

[0033] Figure 6 This is a schematic diagram of the heat exchanger in Example 2.

[0034] Explanation of reference numerals in the attached drawings: 10, heat exchange unit; 11, first heat exchange plate; 111, first heat exchange section; 112, first connecting section; 1121, flange; 1122, first inclined section; 1123, second inclined section; 1124, extension section; 12, second heat exchange plate; 121, second heat exchange section; 1221, folded edge; 1222, third inclined section; 1223, fourth inclined section; 1224, fifth inclined section; 1225, adjusting section; 122, second connecting section; 13, waste heat channel; 14, first heat exchange section; 141, protrusion; 142, first arc-shaped section; 143, arc-shaped groove; 15, second heat exchange section; 151, recess; 152, second arc-shaped section; 153, protruding rib; 20, fresh air channel; 30, frame. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0038] Figure 1 and Figure 2 The diagram illustrates the structure of a heat exchange unit, comprising a first heat exchange plate 11 and a second heat exchange plate 12 connected to each other. Both are sheet metal structures formed by processes such as stamping and bending. The first heat exchange plate 11 includes a first heat exchange portion 111 and a first connecting portion 112 connected to both sides of the first heat exchange portion 111. The second heat exchange plate 12 includes a second heat exchange portion 121 and a second connecting portion 122 connected to both sides of the second heat exchange portion 121. The connection between the first connecting portion 112 and the second connecting portion 122 is achieved by connecting the first heat exchange plate 11 and the second heat exchange plate 12.

[0039] Combination Figure 3 and Figure 4The first connecting portion 112 includes a flange 1121 connecting one side of the first heat exchange portion 111, a first bent section connecting the flange 1121, and an extension section 1124 connecting the first bent section. The first bent section includes a first inclined section 1122 and a second inclined section 1123 at a certain angle, and the extension section 1124 connects one end of the second inclined section 1123, and the two also form a certain angle.

[0040] The second connecting portion 122 includes a second bent section, a folded edge 1221 connecting the two ends of the second bent section, a fifth inclined section 1224, and an adjusting section 1225 connecting the fifth inclined section 1224. One end of the adjusting section 1225 is connected to the second heat exchange portion 121. The second bent section includes a third inclined section 1222 and a fourth inclined section 1223 at a certain angle. One end of the fourth inclined section 1223 is connected to the fifth inclined section 1224, and the two also form a certain angle.

[0041] When the first connecting part 112 and the second connecting part 122 cooperate with each other, the first bent section abuts against the second bent section, and further, the inner surface of the first inclined section 1122 abuts against the inner surface of the third inclined section 1222, and the inner surface of the second inclined section 1123 abuts against the inner surface of the fourth inclined section 1223. At the same time, the inner surface of the extension section 1124 abuts against the inner surface of the fifth inclined section 1224, thereby realizing the guiding connection between the first connecting part 112 and the second connecting part 122. When connecting the first heat exchange plate 11 and the second heat exchange plate 12, one of the heat exchange plates can be guided and inserted from one end of the other heat exchange plate, and the two can slide together to achieve rapid connection and positioning.

[0042] Meanwhile, the flange 1121 and the folded edge 1221 abut against each other, and the two are connected by welding or fasteners to finally achieve the connection and fixation of the first heat exchange plate 11 and the second heat exchange plate 12. In this embodiment, the flange 1121 is a double-layer structure, which forms a triple-layer structure after abutting with the folded edge 1221. Compared with the existing two flanges 1221 abutting connection, it is better in terms of support strength and stability after connection.

[0043] Furthermore, the contact between the first and second bending sections, combined with the contact between the extension section 1124 and the fifth inclined section 1224, creates a labyrinthine-like sealing structure at the connection between the first connecting part 112 and the second connecting part 122. A certain distance exists between the first heat exchange part 111 and the second heat exchange part 121, forming a waste heat channel 13 for the flow of heating waste gas. The labyrinthine-like sealing structure formed on both sides of the waste heat channel 13 improves the sealing performance during waste heat flow, reducing the possibility of waste heat overflow. Additionally, the adjusting section 1225 has a vertical section at one end, the height of which can be adjusted according to the flow rate of waste heat, thereby changing the height of the waste heat channel 13.

[0044] See Figure 5Both the first heat exchange section 111 and the second heat exchange section 121 include several first heat exchange segments 14 and second heat exchange segments 15 arranged at intervals. The first heat exchange segment 14 includes a plurality of protrusions 141 arranged at intervals. Adjacent protrusions 141 are connected by a first arc-shaped segment 142. An arc-shaped groove 143 is also provided on the protrusion 141, and the arc-shaped groove 143 protrudes towards the side of the heat waste channel 13.

[0045] The second heat exchange section 15 includes a plurality of recesses 151 arranged at intervals. Adjacent recesses 151 are connected by a second arc-shaped section 152. A rib 153 is also provided on the recess 151, and the rib 153 protrudes away from the heat waste channel 13. The first arc-shaped section 142 protrudes towards the heat waste channel 13, and the second arc-shaped section 152 protrudes away from the heat waste channel 13. Thus, both the first heat exchange section 111 and the second heat exchange section 121 have a heat exchange structure with a similar wave shape to increase the heat exchange area. The arc-shaped groove 143 and the rib 153 are arranged in opposite directions to the extension direction of the ribs 141 and the recesses 151, which further increases the heat exchange area. Example 2

[0046] See Figure 6 The diagram shows a heat exchanger structure, including a frame 30 and a plurality of heat exchange units 10 mounted on the frame 30, with a gap between adjacent heat exchange units 10 forming a fresh air channel 20 for external fresh air circulation.

[0047] In actual use, the heat waste generated by the styling machine enters the heat waste channel 13 of each heat exchange unit 10 through the diversion port on the diversion plate. The heat waste can fully contact the first heat exchange section 14 and the second heat exchange section 15. At the same time, external fresh air enters from the fresh air channel 20, and in the fresh air channel 20, it also fully contacts the first heat exchange section 14 and the second heat exchange section 15 in the two adjacent heat exchange units 10 to remove the heat of the heat waste, thereby reducing the temperature in the heat waste channel 13 and achieving the purpose of heat exchange.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat exchange unit, characterized in that, include: A first heat exchange plate (11) includes a first heat exchange section (111) and a first connecting section (112) connecting both sides of the first heat exchange section (111). The first connecting section (112) includes a first bent section. The second heat exchange plate (12) includes a second heat exchange section (121) and a second connecting section (122) connected to both sides of the second heat exchange section (121). The second connecting section (122) includes a second bending section. The first bending section abuts against the inner side of the second bending section, and there is a gap between the first heat exchange section (111) and the second heat exchange section (121) to form a heat waste channel (13).

2. The heat exchange unit according to claim 1, characterized in that, The first bending segment includes a first inclined segment (1122) and a second inclined segment (1123) with a certain angle; the second bending segment includes a third inclined segment (1222) and a fourth inclined segment (1223) with a certain angle, the first inclined segment (1122) and the third inclined segment (1222) abutting each other, and the second inclined segment (1123) and the fourth inclined segment (1223) abutting each other.

3. The heat exchange unit according to claim 1, characterized in that, The first connecting portion (112) further includes an extension (1124) connected to the end of the first bent section; the second connecting portion (122) further includes a fifth inclined section (1224) connected to the end of the second bent section, the extension (1124) abutting against the inner surface of the fifth inclined section (1224).

4. The heat exchange unit according to claim 3, characterized in that, The second connecting part (122) further includes an adjusting section (1225), which connects the fifth inclined section (1224) and the second heat exchange part (121).

5. The heat exchange unit according to claim 1, characterized in that, The first connecting part (112) further includes a flange (1121) connecting the first heat exchange part (111) and the first bending section; the second connecting part (122) further includes a flange (1221) extending outward from one end of the second bending section, the flange (1121) abutting against the upper end face of the flange (1221).

6. The heat exchange unit according to claim 1, characterized in that, Both the first heat exchange unit (111) and the second heat exchange unit (121) include: The first heat exchange section (14) has multiple sections arranged at intervals; and The second heat exchange section (15) is located between two adjacent first heat exchange sections (14); The first heat exchange section (14) includes a plurality of protrusions (141) arranged at intervals, and the second heat exchange section (15) includes a plurality of recesses (151) arranged at intervals.

7. The heat exchange unit according to claim 6, characterized in that, The recess (151) is located between two adjacent protrusions (141).

8. The heat exchange unit according to claim 6, characterized in that, The first heat exchange section (14) further includes a first arc-shaped section (142) connecting two adjacent protrusions (141); the second heat exchange section (15) further includes a second arc-shaped section (152) connecting two adjacent concave parts (151); wherein the first arc-shaped section (142) is recessed and the second arc-shaped section (152) is protruding.

9. The heat exchange unit according to claim 6, characterized in that, The first heat exchange section (14) further includes an arc groove (143), which is formed on the protrusion (141); the second heat exchange section (15) further includes a rib (153), which protrudes upward from the end face of the recess (151).

10. A heat exchanger, characterized in that, It includes at least two heat exchange units as described in any one of claims 1-9, with adjacent heat exchange units (10) having a spacing to form a fresh air duct (20).

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