Heat exchanger flat tube and heat exchanger
By setting large-section ribs in the heat exchanger plate connection section, the problem of insufficient connection strength of flat tubes in heat exchangers over long distances is solved, achieving higher connection strength and customization flexibility, while reducing production costs.
Patent Information
- Application Number
- CN202520374712.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-05
AI Technical Summary
When existing heat exchanger flat tubes are connected over long distances, the connection strength at the junction of the sub-plates is insufficient, affecting the service life.
A rib with a cross-sectional area larger than the bulge is set at the connection section of the heat exchange plate to increase the connection area, and the length of the flat tube is adjusted by the mold to enhance the connection strength, thereby reducing the types of molds and reducing costs.
It improves the connection strength of the heat exchange plates, increases customization flexibility, reduces production costs, and reduces the resistance to medium flow.
Smart Images
Figure CN223954733U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchange technical field especially relates to a kind of heat exchanger flat tube and heat exchanger. BACKGROUND
[0002] Microchannel heat exchanger includes multiple flat tubes, and the flat tube is formed by two heat exchange plates, and the heat exchange plate is formed by die machining, and the length of the heat exchange plate formed by die machining is short, and when a heat exchange plate of a certain length is needed, multiple sub-plates need to be connected to form.
[0003] In the prior art, after the sub-plates are spliced to form a heat exchange plate of a desired length, the heat exchange plate is formed by stamping, the two heat exchange plates are arranged oppositely, and the convex hull on one heat exchange plate and the convex hull on the other heat exchange plate are butt-welded and connected. The convex hulls are also butt-welded and connected at the joint of the sub-plates. However, the cross-sectional area of the convex hulls is small, and when the length of the heat exchange plate is too long, the connection strength at the joint of the sub-plates is not enough, which affects the service life of the heat exchanger. SUMMARY
[0004] Therefore, it is necessary to provide a heat exchanger flat tube that can increase the connection strength between sub-plates.
[0005] The utility model provides a kind of heat exchanger flat tube, including two oppositely arranged heat exchange plates, the heat exchange plate includes plate body, multiple interval arranged convex hulls are equipped on the plate body, the convex hulls on two plate bodies are oppositely arranged and are interconnected, to make the gap between the convex hulls form flow-through channel;The plate body includes multiple sub-plates, the adjacent sub-plates have connecting section between them, the connecting section is connected with the adjacent sub-plates at both ends respectively, multiple convex ribs are equipped on the connecting section, multiple convex ribs are interval arranged, and are interval arranged with the convex hull, the cross-sectional area of the convex rib is greater than the cross-sectional area of the convex hull, and the convex ribs on two plate bodies are oppositely arranged and are interconnected.
[0006] In this way, the length of the flat tube can be adjusted according to the needs, the flexibility of customization is increased, only a few types of molds are needed, the cost is reduced, and the cross-sectional area of the convex rib is greater than that of the convex hull at the joint of the sub-plates. When the upper and lower heat exchange plates are connected, the connection area of the two plates can be increased, thereby increasing the connection strength between the sub-plates.
[0007] In one embodiment, the length of the convex rib ranges from 2mm to 20mm, and / or the width of the convex rib ranges from 0.5mm to 5mm.
[0008] How to set, not only can guarantee connection strength, can guarantee heat exchange length of heat exchange plate.
[0009] In one of the embodiments, the distance between adjacent ribs is in the range of [0.5mm, 10mm], and / or, the two ends of the rib are in the shape of an arc with a radius R, R being 0.5 times the width of the rib.
[0010] In this way, the width of the flow channel between the ribs and the ribs, and between the ribs and the convexes can be ensured, the medium flow resistance can be reduced, and the connection strength between the sub-plates can be ensured.
[0011] In one of the embodiments, along the width direction of the flat tube, the distance between adjacent convexes is W3, the distance between adjacent ribs is H, the number of a row of ribs on the connecting section is N1, and the number of a row of convexes close to the ribs is N3, (N1+1)×H≥0.5×W3×(N3+1).
[0012] In this way, the gap between the ribs and the gap between the ribs and the convexes can be ensured, and the flow resistance can be prevented from being increased due to too small gap.
[0013] In one of the embodiments, the plate body is provided with a barrier portion, the barrier portion is protrudingly arranged relative to the plate body, the plate body has a first end and a second end, the barrier portion extends from the first end to close to the second end and is spaced from the second end, so that the flow channel forms a first channel and a second channel which are in communication with each other, the medium enters the first channel from the first end, turns at the second end and flows into the second channel and flows out from the first end.
[0014] In one of the embodiments, the length of the rib in the first channel is L1, the length of the rib in the second channel is L2, 0.25≤L1 / L2≤4; and / or, the width of the rib in the first channel is W1, the width of the rib in the second channel is W2, 0.25≤W1 / W2≤4; and / or, the distance between adjacent ribs in the first channel is H1, the distance between adjacent ribs in the second channel is H2, 0.25≤H1 / H2≤4.
[0015] In this way, the length and width of the rib in the first channel, the distance between adjacent ribs, and the distance between the rib and the adjacent convexes in the first channel and the rib in the second channel can not be too different.
[0016] In one of the embodiments, the length of the rib in the first channel is L1, the length of the rib in the second channel is L2, 0.33≤L1 / L2≤3; or, the shape of the rib in the first channel is different from the shape of the rib in the second channel.
[0017] In this way, the difference between L1 and L2 is not too large, so that the strength of the ribs in the first channel or the second channel is not too small, and meanwhile, the processing difficulty is not increased and the heat exchange is not affected.
[0018] In one of the embodiments, one end of the sub-plate is stretched towards and overlapped with one end of the adjacent sub-plate to form the connecting section.
[0019] In one of the embodiments, the ribs are in any one of a waist shape, an elliptical shape and a diamond shape, and / or the ribs are provided with protrusions protruding along the width direction of the flat tube.
[0020] The utility model also provides a heat exchanger which comprises a plurality of the above-mentioned heat exchanger flat tubes, and the plurality of heat exchanger flat tubes are arranged in parallel and at intervals.
[0021] The utility model discloses a heat exchanger plate, which is modularized, and the ribs with a cross-sectional area larger than the convex envelope are arranged at the connecting section of the adjacent sub-plates, so that the connecting area of the sub-plates of the upper and lower heat exchanger plates at the connecting section is increased, the connecting strength of the heat exchanger plates is strengthened, the length of the flat tube can be flexibly adjusted by increasing or decreasing the number of the intermediate sub-plates, the types of the molds can be reduced, and the cost of mold opening is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.
[0023] Figure 1 The structure diagram of the heat exchanger plate of the heat exchanger flat tube provided by the utility model is shown in the figure.
[0024] Figure 2 The structure diagram of the heat exchanger plate of the heat exchanger flat tube provided by the utility model is shown in the figure. Figure 1 The local enlarged view of A in the figure.
[0025] Figure 3 The structure diagram of the rib of one embodiment is shown in the figure.
[0026] Figure 4 The structure diagram of the rib of another embodiment is shown in the figure.
[0027] Figure 5 The structure diagram of the rib of still another embodiment is shown in the figure.
[0028] Figure 6 The structure diagram of the rib of still another embodiment is shown in the figure.
[0029] Figure 7Here is a schematic diagram of the structure of the protruding rib in another embodiment;
[0030] Figure 8 This is a 3D view of the heat exchanger.
[0031] Reference numerals: 100, flat tube; 101, flow channel; 101a, first channel; 101b, second channel; 10, heat exchange plate; 11, plate body; 111, sub-plate; 111a, rib; 111b, protrusion; 112, barrier; 12, bulge; 13, first opening; 14, second opening; 15, first end; 16, second end; 17, groove; 200, heat exchanger; 201, fin; 202, manifold. Detailed Implementation
[0032] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0035] In the utility model, unless another definite provision and limitation, first feature is on second feature "on", "under" can be first feature direct and second feature contact, or first feature and second feature indirectly contact through intermediate medium.
[0036] Unless otherwise defined, all technical and scientific terms used in the specification of the utility model are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the description of the utility model merely for the purpose of describing specific embodiments and is not intended to limit the utility model. The term "and / or" used in the specification of the utility model includes any and all combinations of one or more associated listed items.
[0037] Please see Figure 1 The utility model provides a kind of flat tube 100 of heat exchanger, install in microchannel heat exchanger 200, for the flow of medium, medium is heat exchanged with outside by heat exchanger 200.
[0038] Specifically, flat tube 100 includes two heat exchange plates 10, heat exchange plate 10 includes slab 11, slab 11 is equipped with multiple mutually spaced convex 12, two slab 11 are oppositely arranged, and the convex 12 on slab 11 are oppositely arranged and one-to-one corresponding and connect, so that the gap between convex 12 forms flow-through passage 101, medium flows in flow-through passage 101.
[0039] Convex 12 is arranged in row and is multiple rows, multiple rows of convex 12 are staggered in the length direction of heat exchange plate 10, so that medium flows in wave-shaped path in flow-through passage 101.
[0040] Groove 17 is set on slab 11, and convex 12 is arranged in groove 17.
[0041] Two heat exchange plates 10 are fixed after stamping by welding connection.
[0042] The end of flat tube 100 has first port 13 and second port 14, and first port 13 and second port 14 are communicated with flow-through passage 101 respectively, for medium to enter and exit.
[0043] The plate body 11 comprises a plurality of sub-plates 111, which are connected in sequence. Thus, only a few types of sub-plates 111 at both ends and in the middle need to be processed. The length of the heat exchange plate 10 is adjusted by increasing or decreasing the number of sub-plates 111 in the middle, which improves the flexibility of production and customization for customers, reduces the types of molds required, and reduces costs.
[0044] The adjacent sub-plates 111 have a connecting section (not labeled in the figure) at both ends, which is connected to the plate body 11 of the adjacent sub-plate 111. A plurality of ribs 111a are provided on the connecting section, which are spaced apart. The ribs 111a are spaced apart from the convex bump 12. The provision of the ribs 111a can strengthen the strength of the joint of the sub-plates 111.
[0045] The cross-sectional area of the ribs 111a is greater than that of the convex bump 12, which can increase the contact area when two heat exchange plates 10 are connected, and strengthen the connection strength of the heat exchange plate 10. It can be understood that the existing heat exchange plate is connected by stamping after being spliced by the sub-plate. The convex bumps on the two heat exchange plates are one-to-one corresponding and placed opposite to each other, and then connected by convex bump to convex bump welding. The cross-sectional area of the convex bump is small, and the connection strength of the joint of the sub-plate and the sub-plate is not enough, thereby affecting the performance of the heat exchanger.
[0046] One end of the sub-plate 111 is stretched towards the direction of the adjacent sub-plate 111 and overlaps one end of the adjacent sub-plate 111, thereby forming a connecting section. The connecting section has a sufficient area to form ribs 111a with a cross-sectional area greater than that of the convex bump 12. The ribs 111a are formed by stamping at the connecting section of the sub-plate 111, which is simple in process.
[0047] The opposite ends of the adjacent sub-plates 111 are stretched, and the stretched section of one sub-plate 111 overlaps the stretched section of the adjacent sub-plate 111 to form a connecting section. The connecting section does not need to be formed by adding additional material, which is simple in process and can save material.
[0048] Please refer to Figure 3 and Figure 4 The shape of the ribs 111a can be any one of a waist type, an oval type, and a diamond type. Among them, the length of the oval type and the diamond type is shorter, which can strengthen the length of the heat exchange area of the heat exchange plate 10. It should be explained that each row of ribs 111a in the groove 17 on the heat exchange plate 10 is a connecting area, and the rest is a heat exchange area.
[0049] Please refer to Figure 5 , Figure 6 and Figure 7The convex rib 111a is provided with a convex 111b protruding towards the width direction of the heat exchange plate 10. The convex 111b is arranged to make the gap between the convex ribs 111a wavy and consistent with the gap between the convex 12, thereby reducing the flow loss of the medium and enhancing the heat exchange effect.
[0050] The length of the convex rib 111a ranges from 2mm to 20mm, or the width of the convex rib 111a ranges from 0.5mm to 5mm, or the length of the convex rib 111a ranges from 2mm to 20mm and the width of the convex rib 111a ranges from 0.5mm to 5mm. It can be understood that if the convex rib 111a is too long, the heat exchange length of the heat exchange plate 10 will be affected, if the convex rib 111a is too short, the connection strength between the sub-plates 111 will not be enough, similarly, if the convex rib 111a is too wide, the number of convex ribs 111a will be affected, and the firmness of the connection between the sub-plates 111 will be affected, if the convex rib 111a is too narrow, the strength of the connection will be affected. The length of the convex rib 111a can be 2mm, 5mm, 8mm, 10mm, 12mm, 15mm, 20mm or any other value between 2mm and 20mm, and the width of the convex rib 111a can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm or any other value between 0.5mm and 5mm.
[0051] The distance between the adjacent convex ribs 111a ranges from 0.5mm to 10mm, that is, the distance between the central axes of the adjacent convex ribs 111a minus the width of the convex rib 111a ranges from 0.5mm to 10mm, thereby ensuring the width of the gap between the convex ribs 111a and reducing the flow resistance of the medium. It should be explained that if the convex rib 111a is rhombic, elliptical or other non-constant distance, the distance between the adjacent convex ribs 111a refers to the narrowest distance, which is also the case hereinafter and will not be repeated.
[0052] Please refer to Figure 2 In an embodiment, the convex rib 111a is elliptical, and the two ends of the convex rib 111a are arc-shaped with a radius R, and R is 0.5 times the width of the convex rib 111a, thereby ensuring the width of the gap between the two ends of the convex rib 111a and the convex 12.
[0053] In the direction along the width of the plate body 11, the distance between adjacent convex blocks 12 is W3, the number of convex ribs 111a in one row on one connecting section is N1, the number of convex blocks 12 in one row close to the convex ribs 111a is N3, and the distance between adjacent convex ribs 111a is H, satisfying (N1+1)×H≥0.5×W3×(N3+1). Thus, the gap between the convex ribs 111a and the gap between the convex ribs 111a and the convex blocks 12 are ensured, preventing the flow resistance from being increased due to too small gaps. It should be noted that if the flow passage 101 is multiple rows, W3, N1, N3, and H are all parameters of the same row of flow passages 101.
[0054] Embodiment One
[0055] The flow passage 101 is single row (not shown in the figure), that is, the first port 13 and the second port 14 are respectively arranged at the two ends of the heat exchange plate 10. When the heat exchanger 200 is an evaporator, the first port 13 is the inlet, and the medium enters the flow passage 101 from the first port 13 and then flows out from the second port 14; when the heat exchanger 200 is a condenser, the second port 14 is the inlet, and the medium enters the flow passage 101 from the second port 14 and then flows out from the first port 13.
[0056] In this embodiment, the structure and parameters of each row of convex ribs 111a are consistent.
[0057] Embodiment Two
[0058] This embodiment is basically the same as Embodiment One, except that the flow passage 101 of this embodiment is double row.
[0059] The plate body 11 is provided with a barrier portion 112, which is protrudingly arranged relative to the plate body 11. The plate body 11 has opposite first and second ends 15 and 16, and the barrier portion 112 extends from the first end 15 to a position close to the second end 16 and is spaced from the second end 16, so that the flow passage 101 forms first and second channels 101a and 101b that are in communication with each other. The medium enters the first channel 101a from the first end 15, turns at the second end 16 to flow into the second channel 101b, and flows out from the first end 15. The first and second ports 13 and 14 are both located at the first end 15.
[0060] Please refer to Figure 2, the length of the rib 111a in the first channel 101a is L1, the length of the rib 111a in the second channel 101b is L2, 0.25≤L1 / L2≤4; or, the width of the rib 111a in the first channel 101a is W1, the width of the rib 111a in the second channel 101b is W2, 0.25≤W1 / W2≤4; the distance between adjacent ribs 111a in the first channel 101a is H1, the distance between adjacent ribs 111a in the first channel 101a is H2, 0.25≤H1 / H2≤4; or, 0.25≤L1 / L2≤4, 0.25≤W1 / W2≤4, 0.25≤H1 / H2≤4 are simultaneously satisfied. In this way, the length and width of the rib 111a in the first channel 101a, the distance between adjacent ribs 111a, and the distance between the rib 111a and the adjacent convex hull 12 are not too different from the rib 111a in the second channel 101b, so as to ensure that the pressure drop and other performances of the medium in the first channel 101a and the second channel 101b are not too different. It should be explained that the distance here refers to the width of the channel between the rib 111a and the adjacent rib 111a. L1 / L2 can be 0.25, 0.3, 1, 1.5, 2, 3, 4 or any other value between 0.25 and 4, W1 / W2 can be 0.25, 0.3, 1, 1.5, 2, 3, 4 or any other value between 0.25 and 4, H1 / H2 can be 0.25, 0.3, 1, 1.5, 2, 3, 4 or any other value between 0.25 and 4.
[0061] Further, in order to avoid that L1 and L2 are too different to cause the strength of the rib 111a in the first channel 101a or the second channel 101b to be too small, while avoiding increasing the processing difficulty and affecting heat exchange, the relationship between L1 and L2 is set to 0.33≤L1 / L2≤3. L1 / L2 can be 0.33, 1, 1.5, 2, 3 or any other value between 0.33 and 3.
[0062] The shape of the rib 111a in the first channel 101a and the shape of the rib 111a in the second channel 101b can be set to be different, i.e., the rib 111a in the first channel 101a is elliptical, the rib 111a in the second channel 101b is rhombic, or the rib 111a in the first channel 101a is waist-shaped, and the rib 111a in the second channel 101b is elliptical, which are not listed one by one here.
[0063] Please refer to Figure 8The utility model also provides a heat exchanger 200, for microchannel heat exchanger 200, including a plurality of fins 201, a plurality of flat tubes 100 and header 202, a plurality of flat tubes 100 are parallel and interval arrangement, a plurality of fins 201 are located between flat tube 100 respectively, header 202 is two, when the flow passage 101 is single row, two headers 202 are located at both ends of flat tube 100 respectively, when the flow passage 101 is double row, two headers 202 are located at the same end, and are communicated with first port 13 and second port 14 respectively.
[0064] The utility model discloses a different mould is used to process two ends' sub -board 111 and the middle sub -board 111, one end of sub -board 111 stretches and is lapped in one end of another sub -board 111, further through stamping forms the convex rib 111a of the cross -sectional area greater than the convex 12, can strengthen the connecting strength between sub -board 111, simultaneously, can through the quantity of middle sub -board 111 of increasing and reducing flexibly adjust the length of flat tube 100, the kind of mould can reduce to reduce the cost of opening mould.
[0065] The above-described technical features of the embodiments can be combined in any manner. For the sake of brevity, not all possible combinations are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure.
[0066] Those skilled in the art should understand that the above embodiments are only used to illustrate the present application, but not as a limitation on the present application. Any suitable modification and variation within the spirit and scope of the present application shall fall within the scope of the present application.
Claims
1. A heat exchanger flat tube comprising two oppositely arranged heat exchange plates (10), the heat exchange plates (10) comprising plate bodies (11) provided with a plurality of convex blocks (12) arranged at intervals, the convex blocks (12) on the two plate bodies (11) being oppositely arranged and connected to each other, so that the gaps between the convex blocks (12) form flow-through channels (101); characterized in that the plate body (11) comprising a plurality of sub-plates (111), the adjacent sub-plates (111) having connecting sections, the two ends of the connecting section being connected to the adjacent sub-plates (111) respectively, the connecting section being provided with a plurality of convex ribs (111a), the plurality of convex ribs (111a) being arranged at intervals and spaced apart from the convex blocks (12), the cross-sectional area of the convex rib (111a) being larger than that of the convex block (12), the convex ribs (111a) on the two plate bodies (11) being oppositely arranged and connected to each other.
2. The heat exchanger tube as set forth in claim 1, wherein The length of the convex rib (111a) ranges from [2mm, 20mm], and / or the width of the convex rib (111a) ranges from [0.5mm, 5mm].
3. The heat exchanger tube as set forth in claim 1, wherein The distance between adjacent convex ribs (111a) ranges from [0.5mm, 10mm], and / or the two ends of the convex rib (111a) are arc-shaped with a radius R, R being 0.5 times the width of the convex rib (111a).
4. The heat exchanger tube as set forth in claim 1, wherein Along the width direction of the flat tube, the distance between adjacent convex blocks (12) is W3, the distance between adjacent convex ribs (111a) is H, the number of a row of convex ribs (111a) on the connecting section is N1, and the number of a row of convex blocks (12) close to the convex rib (111a) is N3, (N1+1)×H≥0.5×W3×(N3+1).
5. The heat exchanger tube as claimed in any one of claims 1 to 4, characterized in that The plate body (11) is provided with a barrier portion (112) protruding from the plate body (11), the plate body (11) having a first end (15) and a second end (16), the barrier portion (112) extending from the first end (15) to close to the second end (16) and spaced apart from the second end (16), so that the flow-through channels (101) form first and second channels (101a, 101b) that are connected to each other, the medium entering the first channel (101a) from the first end (15), turning at the second end (16) and flowing into the second channel (101b) and flowing out from the first end (15).
6. The heat exchanger tube as claimed in claim 5, wherein The length of the convex rib (111a) in the first channel (101a) is L1, the length of the convex rib (111a) in the second channel (101b) is L2, 0.25≤L1 / L2≤4; and / or, the width of the convex rib (111a) in the first channel (101a) is W1, the width of the convex rib (111a) in the second channel (101b) is W2, 0.25≤W1 / W2≤4; And / or, the interval between adjacent ribs (111a) in the first channel (101a) is H1, the interval between adjacent ribs (111a) in the second channel (101b) is H2, 0.25≤H1 / H2≤4.
7. The heat exchanger tube as set forth in claim 5 wherein, The length of the rib (111a) in the first channel (101a) is L1, the length of the rib (111a) in the second channel (101b) is L2, 0.33≤L1 / L2≤3; or, the shape of the rib (111a) in the first channel (101a) is different from the shape of the rib (111a) in the second channel (101b).
8. The heat exchanger tube as claimed in claim 1, wherein One end of the sub-plate (111) is stretched towards and overlapped with one end of the adjacent sub-plate (111) to form the connecting section.
9. The heat exchanger tube as claimed in claim 1, wherein The rib (111a) is any one of a waist type, an oval type, or a diamond type, and / or, the rib (111a) is provided with a protrusion (111b) protruding along the width direction of the flat tube.
10. A heat exchanger, characterized by The heat exchanger flat tube comprises a plurality of heat exchanger flat tubes as claimed in any one of claims 1-9, and the plurality of heat exchanger flat tubes are arranged in parallel and at intervals.