Heat exchange plate and heat exchange unit

Abstract

The utility model belongs to the technical field of heat exchangers, particularly relates to a heat exchange plate and a heat exchange unit, and solves the problem that mixing of heat exchange media on two sides caused by inner leakage cannot be avoided. The heat exchange plate comprises an upper corrugated plate and a lower corrugated plate which are arranged in a stacked mode, a plurality of corrugation sets distributed in the transverse direction are arranged between the upper corrugated plate and the lower corrugated plate, each corrugation set comprises an upper corrugation body of the upper corrugated plate and a lower corrugation body of the lower corrugated plate, and the upper corrugation bodies and the lower corrugation bodies are arranged in a stacked mode. A flow guide structure is arranged between the upper corrugation body and the lower corrugation body of at least one corrugation set, and the flow guide structure can prevent fluid on the two sides from being mixed when the upper corrugation body or the lower corrugation body is damaged and can enable the fluid entering the position between the upper corrugation body and the lower corrugation body to flow out to the outside. The leaked heat exchange medium can be guided out in time when inner leakage occurs, mixing is avoided, and safety and reliability are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a heat exchange plate and a heat exchange unit. Background Art

[0002] As the most important heat exchange component of the plate heat exchanger, the heat exchange efficiency and flow resistance of the heat exchanger basically determine the thermal performance of the plate heat exchanger.

[0003] Currently, two types of plate heat exchangers are commonly used: single-plate herringbone corrugated plates and double-plate herringbone corrugated plates. However, single-plate heat exchangers can experience internal leakage when subjected to excessive pressure, fatigue, corrosion, ice breakage, and other factors, leading to mixing of fluids on both sides and affecting heat transfer performance. Furthermore, in some specific applications, different heat transfer media may flow between the two sides. Such mixing can lead to contamination of the heat transfer media and even safety concerns. Utility Model Content

[0004] The purpose of the utility model is to propose a heat exchange plate in view of the above problems existing in the prior art.

[0005] In order to achieve the purpose of innovation of this utility model, the following technical solutions can be used:

[0006] A heat exchange plate comprises an upper corrugated plate and a lower corrugated plate arranged in a stacked manner, wherein a plurality of corrugated groups distributed in the transverse direction are arranged between the upper corrugated plate and the lower corrugated plate, wherein the corrugated groups comprise an upper corrugated body of the upper corrugated plate and a lower corrugated body of the lower corrugated plate, wherein the upper corrugated body and the lower corrugated body are stacked, and a flow guide structure is provided between the upper corrugated body and the lower corrugated body of at least one corrugated group, which can avoid mixing of fluids on both sides when the upper corrugated body or the lower corrugated body is damaged and can allow the fluid entering between the upper corrugated body and the lower corrugated body to flow out to the outside.

[0007] The heat exchange plate provided by the present invention is mainly composed of an upper corrugated plate and a lower corrugated plate, which are stacked and arranged, and relevant channels for the circulation and heat exchange of heat exchange medium are formed between the corrugated groups. For the function of circulating heat exchange medium, the stacked upper corrugated plate and the lower corrugated plate are equivalent to one piece. In particular, a guide structure is provided between the upper corrugated body and the lower corrugated body. The guide structure has the function of damage protection. When the upper corrugated body or the lower corrugated body is damaged, the guide structure formed by the double-layer plate design can promptly guide the leaked heat exchange medium to prevent the media on both sides from mixing. In specific application scenarios, the fluids on both sides may be different media. Preventing mixing can effectively avoid performance degradation, pollution and even safety problems.

[0008] In the above heat exchange plate, the guide structure includes a first guide channel provided between the peak of the upper crest of the upper corrugated body and the peak of the lower crest of the lower corrugated body and extending along the corrugation direction.

[0009] The first guide channel is located between the peaks of the upper and lower wave crests. When the corrugated body is damaged, the leaked heat exchange medium can flow out through this channel, effectively preventing the mixing of the fluids on both sides and being able to promptly guide the leaked fluid out, thereby improving the safety and reliability of the heat exchange plate. The corrugation direction refers to the length direction of the corrugated body.

[0010] As an optimization, the lower surface of the upper corrugated plate is tightly and sealedly connected to the upper surface of the lower corrugated plate except for the first guide channel.

[0011] The upper and lower corrugated plates fit tightly together over most areas, ensuring the formation of a primary flow channel and the timely removal of leaked heat exchange media when diversion is required. The fit provides mutual support between the two, enhancing structural strength and ensuring efficient heat exchange while minimizing the impact on heat exchange performance. Furthermore, it eliminates the possibility of air trapped between the plates, preventing structural damage due to thermal expansion and contraction, and improving safety and reliability. The sealed connection can be achieved by brazing the upper and lower plates at relevant locations.

[0012] In the above heat exchange plate, a second flow guide channel extending along the corrugation direction is provided between the bottom of the upper trough of the upper corrugated body and the bottom of the lower trough of the lower corrugated body.

[0013] Corresponding guide structures can be set not only at the crest but also at the trough. Specifically, a second guide channel is set between the upper trough and the lower trough. The second guide channel is similar to the first guide channel.

[0014] As an optimization, the areas between the lower surface of the upper corrugated plate and the upper surface of the lower corrugated plate except the first guide channel and the second guide channel are all fitted and sealed.

[0015] Except for the first guide channel and the second guide channel, the upper corrugated plates and the lower corrugated plates in the remaining areas are sealed and fitted together, ensuring structural strength and heat exchange performance.

[0016] In the above-mentioned heat exchange plate, the inner wall of the first guide channel is provided with at least one first branch channel distributed along its circumference and extending in the corrugation direction; and / or the inner wall of the second guide channel is provided with at least one second branch channel distributed along its circumference and extending in the corrugation direction.

[0017] The first diverter is arranged on the inner wall of the first guide channel and extends axially and is distributed circumferentially. Together with the main part of the first guide channel, it plays a diversion role. Specifically, the first diverter is generated by the different cross-sectional shapes of the first guide channel. For example, the top shape of the lower corrugated body inside the first guide channel can be flat, convex, two-stage, arc-shaped, trapezoidal, concave, etc., and the first diverter is formed between the top of the lower corrugated body and the top of the upper corrugated body. The specific shape and number are adapted to the shape of the top of the lower corrugated body, making the form diversified. The same is true for the second diverter.

[0018] In the above-mentioned heat exchange plate, the cross-sectional area of ​​the first guide channel is equal to the cross-sectional area of ​​the second guide channel; or, the cross-sectional area of ​​the first guide channel is larger than the cross-sectional area of ​​the second guide channel; or, the cross-sectional area of ​​the first guide channel is smaller than the cross-sectional area of ​​the second guide channel.

[0019] The cross-sectional areas of the first guide channel and the second guide channel may be the same or different, and are mainly designed to smoothly guide out the leaked heat exchange medium, and are flexibly configured.

[0020] As a further optimization, the distance between the peak of the upper crest of the upper corrugated body and the peak of the lower crest of the lower corrugated body is 0.2-1mm; the distance between the bottom of the upper trough of the upper corrugated body and the bottom of the lower trough of the lower corrugated body is 0.2-1mm.

[0021] The tops of the upper and lower wave crests are preferably flat, i.e., the two crests are flat and parallel to each other. The spacing between the two crests is between 0.2-1mm to ensure good and sufficient flow guidance. The spacing is preferably 0.2-0.5mm to ensure heat exchange performance. The upper and lower corrugated bodies are arranged similarly.

[0022] In the above heat exchange plate, one of two adjacent corrugation groups is provided with the first guide channel, or all the corrugation groups are provided with the first guide channel.

[0023] The first flow guiding channel can be provided on each corrugation group or can be provided at intervals. The setting is flexible, ensuring a good and sufficient flow guiding effect while also ensuring heat exchange performance.

[0024] In the aforementioned heat exchange plate, the first flow guide channels are closed at both ends. Two adjacent first flow guide channels are connected by a first connecting structure that intersects the corrugations. The first connecting structure includes N first connecting channels distributed along the length of the two adjacent first flow guide channels. The first connecting channels connect the two adjacent first flow guide channels, and N ≥ 1. The number of first connecting channels in two adjacent first connecting structures is equal and arranged in a one-to-one correspondence; alternatively, the number of first connecting channels in two adjacent first connecting structures is unequal.

[0025] The first connecting structure is used to guide the leaked medium from the first flow channel. One or more first connecting channels can be provided to improve the efficiency of heat exchange medium guidance. Adjacent first connecting structures have the same number of first connecting channels, and they correspond one to one. This ensures that the flow rate of leaked fluid is the same between adjacent first connecting structures, improving the efficiency of leaked fluid guidance. Of course, the first connecting channels can also be different, allowing for flexibility and freedom in configuration while ensuring effective leakage fluid guidance.

[0026] In the above heat exchange plate, one of two adjacent corrugation groups is provided with the second flow guiding channel, or all the corrugation groups are provided with the second flow guiding channel.

[0027] The second guide channel can be provided on each corrugation group, or can be provided at intervals, similar to the first guide channel.

[0028] In the aforementioned heat exchange plate, the second flow guide channels are closed at both ends, and two adjacent second flow guide channels are connected by a second connecting structure. The second connecting structure includes M second connecting channels distributed along the length of the two adjacent second flow guide channels. The second connecting channels connect the two adjacent second flow guide channels, and M ≥ 1. The number of second connecting channels in two adjacent second connecting structures is equal and arranged in a one-to-one correspondence; alternatively, the number of second connecting channels in two adjacent second connecting structures is unequal.

[0029] Similar to the first connecting channel, the second connecting structure is realized by one or more second connecting channels, and the second connecting channels also have a variety of flexible settings.

[0030] In the above-mentioned heat exchange plate, the longitudinal ends of the upper corrugated plate are provided with flanges connected to the lower corrugated plate for closing the ends.

[0031] The flanges are used to close each diversion channel from both ends to ensure that the leaked fluid flows out through the connecting structure when diversion is required.

[0032] As an optimization, an extension section is provided on the flange.

[0033] The flange extends in the vertical direction, and the extended portion is the extension section, which ensures complete closure and facilitates the fixed connection between the flange and the upper corrugated plate and the lower corrugated plate. It can also be used for positioning and connection when multiple heat exchange plates are stacked for use.

[0034] In the above-mentioned heat exchange plate, the upper corrugated body and the lower corrugated body are distributed in the horizontal direction, and the horizontal cross-sections of the upper corrugated body and the lower corrugated body are both V-shaped; the vertical cross-section of the first guide channel is a flat-top trapezoid or a circular-arc-top trapezoid, and the vertical cross-section of the second guide channel is a flat-top trapezoid or a circular-arc-top trapezoid.

[0035] The corrugated body is V-shaped, which is conducive to guiding the heat exchange medium to both sides after it is input, ensuring complete contact between the heat exchange medium and the plate body, and also increasing the setting length of the guide channel, thereby improving the heat exchange efficiency. In addition, the cross-section of the guide channel is preferably trapezoidal, but can also be other suitable shapes. The trapezoid can be a flat top or a circular top. The circular top here can be the upper bottom and / or lower bottom of the trapezoid, with various forms and flexible settings.

[0036] Another purpose of the present invention is to propose a heat exchange unit to address the above-mentioned problems in the prior art.

[0037] In order to achieve the purpose of the innovative utility model, the following technical solutions can be used:

[0038] A heat exchange unit comprises two heat exchange plates as described above, wherein the lower corrugated plate of one heat exchange plate is connected to the upper corrugated plate of the other heat exchange plate, and the upper corrugated plate contacts the lower corrugated plate to form a cross contact point.

[0039] A heat exchange unit consists of two stacked heat exchange plates. A channel for the circulation of heat exchange medium is formed between the two heat exchange plates. The heat exchange medium flows through the channel and exchanges heat with the outside world or adjacent heat exchange units through the plate body of the heat exchange plate to achieve the purpose of heat exchange. The contact position between the upper corrugated plate and the lower corrugated plate is the cross contact point. Welding is applied at this cross contact point to fix the two heat exchange plates and ensure the structural stability of the heat exchange unit.

[0040] In the above heat exchange unit, one of the heat exchange plates is rotated 180 degrees horizontally.

[0041] There is a 180-degree angle between adjacent heat exchange plates in the horizontal direction, which makes the V-shaped corrugations intersect with each other, ensuring the connectivity between the guide channels, ensuring the passage of the heat exchange medium, and making the heat exchange medium fully contact with the corrugated plate, thereby improving the heat exchange efficiency.

[0042] As an optimization, the longitudinal length of one heat exchange plate is smaller than that of the other, and the extension section of one heat exchange plate is located outside the extension section of the other heat exchange plate. This ensures that adjacent extension sections can be staggered, achieves positioning effects, and also facilitates the fixing of adjacent extension sections.

[0043] Compared with the prior art, the present invention has the following advantages:

[0044] 1. This heat exchange plate is equipped with a guide structure between the upper and lower corrugated bodies, which has the function of damage protection. When the upper or lower corrugated body is damaged, the guide structure can promptly guide the leaked heat exchange medium to prevent the mixing of the media on both sides, which can effectively avoid performance degradation, pollution and even safety problems.

[0045] 2. The upper corrugated plate and the lower corrugated plate fit tightly together in most areas, so that they support each other, improve the structural strength, reduce the impact on heat exchange performance, avoid the possibility of air between them, prevent the problem of structural damage caused by thermal expansion and contraction of air, and improve safety and reliability.

[0046] 3. The top shape of the lower corrugated body inside the first guide channel can be flat, convex, two-stage, arc-shaped, trapezoidal, concave, etc. The specific shape and number of the first branch channel are adapted to the shape of the top of the lower corrugated body, and the forms are diverse.

[0047] 4. The peaks of the upper and lower wave peaks are flat and parallel to each other. The peak spacing is between 0.2-1mm to ensure a good and sufficient flow guidance effect. The spacing is preferably 0.2-0.5mm to ensure heat exchange performance.

[0048] 5. The first connecting structure is used to guide the leaked medium in the first guide channel. One or more first connecting channels can be provided to improve the guide efficiency of the heat exchange medium.

[0049] 6. The V-shaped corrugated bodies intersect with each other, ensuring the connectivity between the guide channels, ensuring the passage of the heat exchange medium, and also making the heat exchange medium fully contact with the corrugated plate body, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural diagram of the heat exchange unit provided by the present invention (Example 1);

[0051] Figure 2 This is a schematic structural diagram of the heat exchange plate provided by the present invention (Example 1);

[0052] Figure 3 This is a schematic cross-sectional view of the heat exchange plate provided by the present invention (Example 1);

[0053] Figure 4 This is a schematic structural diagram of the heat exchange plate provided by the present invention (Example 2);

[0054] Figure 5 1 is a schematic top view of the heat exchange plate provided by the present invention (Example 3);

[0055] Figure 6 It is a cross-sectional schematic diagram of the heat exchange plate provided by the present invention (Example 4).

[0056] In the figure, the heat exchange plate 1, the upper corrugated plate 2, the lower corrugated plate 3, the corrugated group 4, the upper corrugated body 5, the lower corrugated body 6, the guide structure 7, the upper crest 8, the lower crest 9, the first guide channel 10, the upper trough 11, the lower trough 12, the second guide channel 13, the first branch channel 14, the second branch channel 15, the first connecting structure 16, the first connecting channel 17, the second connecting structure 18, the second connecting channel 19, the flange 20, and the extension section 21. DETAILED DESCRIPTION

[0057] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0058] Example 1

[0059] The specific implementation of the heat exchange plate 1 provided by the utility model is as follows Figure 1-3 As shown, it includes an upper corrugated plate 2 and a lower corrugated plate 3 stacked together, and a plurality of corrugated groups 4 distributed laterally are provided between the upper corrugated plate 2 and the lower corrugated plate 3. The corrugated group 4 includes an upper corrugated body 5 of the upper corrugated plate 2 and a lower corrugated body 6 of the lower corrugated plate 3. The upper corrugated body 5 and the lower corrugated body 6 are stacked together, and a guide structure 7 is provided between the upper corrugated body 5 and the lower corrugated body 6, which can avoid mixing of fluids on both sides when the upper corrugated body 5 or the lower corrugated body 6 is damaged and can allow the fluid entering between the upper corrugated body 5 and the lower corrugated body 6 to flow out to the outside.

[0060] Specifically, the heat exchange plate 1 provided by the present invention is mainly composed of an upper corrugated plate 2 and a lower corrugated plate 3. The two plates are stacked, and relevant channels for the circulation and heat exchange of heat exchange medium are formed between the corrugated groups 4. For the function of circulating heat exchange medium, the stacked upper corrugated plate 2 and the lower corrugated plate 3 are equivalent to one piece. In particular, a guide structure 7 is provided between the upper corrugated body 5 and the lower corrugated body 6. The guide structure 7 has the function of damage protection. When the upper corrugated body 5 or the lower corrugated body 6 is damaged, the guide structure 7 formed by the double-layer plate design can promptly guide the leaked heat exchange medium to prevent the media on both sides from mixing. In specific application scenarios, the fluids on both sides may be different media. Preventing mixing can effectively avoid performance degradation, pollution and even safety problems.

[0061] like Figure 3 As shown, the flow guide structure 7 includes a first flow guide channel 10 extending along the corrugation direction and disposed between the peaks of the upper crests 8 of the upper corrugated body 5 and the lower crests 9 of the lower corrugated body 6. The lower surface of the upper corrugated plate 2 and the upper surface of the lower corrugated plate 3 are tightly connected and sealed in an area other than the first flow guide channel 10.

[0062] Specifically, the first flow guide channel 10 is located between the peaks of the upper wave crest 8 and the lower wave crest 9. When the corrugated body is damaged, the leaked heat exchange medium can flow out through this channel, effectively preventing the mixing of the fluids on both sides and enabling the timely discharge of the leaked fluid, thereby improving the safety and reliability of the heat exchange plate 1. The upper corrugated plate 2 and the lower corrugated plate 3 are tightly fitted in most areas, ensuring the formation of the first flow guide channel 10 and ensuring that the leaked heat exchange medium can be discharged in a timely manner when diversion is required. The fitting method allows the two to support each other, improving structural strength. The fitting method ensures efficient heat exchange and reduces the impact on heat exchange performance. In addition, it avoids the possibility of air between them, preventing the problem of structural damage caused by thermal expansion and contraction of air, and improving safety and reliability. Among them, the sealed connection can be achieved by brazing at the relevant positions between the upper corrugated plate 2 and the lower corrugated plate 3.

[0063] Similarly, a second guide channel 13 extending along the corrugation direction is provided between the bottom of the upper trough 11 of the upper corrugated body 5 and the bottom of the lower trough 12 of the lower corrugated body 6. The areas between the lower surface of the upper corrugated plate 2 and the upper surface of the lower corrugated plate 3, except for the first guide channel 10 and the second guide channel 13, are all tightly and hermetically connected.

[0064] like Figure 3 As shown, the inner wall of the first guide channel 10 is provided with four first branch channels 14 distributed along its circumference and extending along the corrugation direction; the inner wall of the second guide channel 13 is provided with four second branch channels 15 distributed along its circumference and extending along the corrugation direction.

[0065] Specifically, the first flow diversion channels 14 are disposed on the inner wall of the first flow diversion channel 10, extending axially and distributed circumferentially. Together with the main body of the first flow diversion channel 10, they function as flow diversion channels. Specifically, the first flow diversion channels 14 are generated by the different cross-sectional shapes of the first flow diversion channel 10. In this embodiment, the top of the lower corrugated body 6 inside the first flow diversion channel 10 is flat, and the first flow diversion channel 10 has a trapezoidal cross-section. The first flow diversion channels 14 are formed at the four corners of this trapezoidal shape. The same applies to the second flow diversion channels 15.

[0066] In this embodiment, the cross-sectional area of ​​the first flow guiding channel 10 is equal to the cross-sectional area of ​​the second flow guiding channel 13. The spacing between the top of the upper crest 8 of the upper corrugated body 5 and the top of the lower crest 9 of the lower corrugated body 6 is 0.2-0.5 mm; the spacing between the bottom of the upper trough 11 of the upper corrugated body 5 and the bottom of the lower trough 12 of the lower corrugated body 6 is 0.2-0.5 mm.

[0067] Specifically, the tops of the upper crest 8 and the lower crest 9 are planar, i.e., the two crests are flat and parallel to each other, with a spacing of 0.2-0.5 mm between the two crests, ensuring heat transfer performance. The upper trough 11 is arc-shaped, and the lower trough 12 is planar.

[0068] In this embodiment, all corrugation groups 4 are equipped with first guide channels 10. Both ends of the first guide channels 10 are closed, and two adjacent first guide channels 10 are connected by a first connecting structure 16 that intersects the corrugations. The first connecting structure 16 includes N first connecting channels 17 distributed along the length of the two adjacent first guide channels 10. The first connecting channels 17 connect the two adjacent first guide channels 10, with N = 1. The number of first connecting channels 17 in two adjacent first connecting structures 16 is equal and arranged in a one-to-one correspondence.

[0069] Specifically, the first flow-guiding channels 10 are provided on each corrugation group 4, ensuring a good and sufficient flow-guiding effect while also guaranteeing heat exchange performance. The first connecting structure 16 is used to guide leaked media from the first flow-guiding channels 10. A single first connecting channel 17 is provided to ensure efficient heat exchange medium removal. Adjacent first connecting structures 16 have the same number of first connecting channels 17 and a one-to-one correspondence, ensuring that adjacent first connecting structures 16 have the same flow rate for leaked fluid, thereby improving leaked fluid removal efficiency.

[0070] Similarly, all corrugation groups 4 are equipped with second flow-guiding channels 13. These second flow-guiding channels 13 are closed at both ends, and two adjacent second flow-guiding channels 13 are connected by a second connecting structure 18. This second connecting structure 18 includes M second connecting channels 19 distributed along the length of the two adjacent second flow-guiding channels 13. These second connecting channels 19 connect the two adjacent second flow-guiding channels 13, with M = 1. The number of second connecting channels 19 in two adjacent second connecting structures 18 is equal and arranged in a one-to-one correspondence. Furthermore, in this embodiment, the first connecting channel 17 and the second connecting channel 19 are implemented through the same channel.

[0071] like Figure 1 、 2 As shown, the longitudinal ends of the upper corrugated plate 2 are each provided with a flange 20 connected to the lower corrugated plate 3 for closing the end, and an extension section 21 is provided on the flange 20.

[0072] Specifically, the flanges 20 are used to seal each diversion channel at both ends, ensuring that leaked fluid flows out through the connecting structure when diversion is required. The flanges 20 extend vertically, and this extended portion, known as the extension section 21, ensures complete sealing and facilitates the secure connection between the flanges 20 and the upper and lower corrugated plates 2, 3. It also serves to position and connect multiple heat exchange plates 1 when stacked.

[0073] As an optimization of this embodiment, the upper corrugated body 5 and the lower corrugated body 6 are distributed in the horizontal direction, and the horizontal cross-sections of the upper corrugated body 5 and the lower corrugated body 6 are both V-shaped; the vertical cross-section of the first guide channel 10 is a flat-top trapezoid, and the vertical cross-section of the second guide channel 13 is a flat-top trapezoid.

[0074] Specifically, the corrugated body is V-shaped, which is conducive to guiding the heat exchange medium to both sides after it is input, ensuring complete contact between the heat exchange medium and the plate body, and also increasing the setting length of the guide channel to improve the heat exchange efficiency.

[0075] The specific implementation of the heat exchange unit provided by the utility model is as follows Figure 1 As shown, it includes two heat exchange plates 1. The lower corrugated plate 3 of one heat exchange plate 1 is connected to the upper corrugated plate 2 of the other heat exchange plate 1. The upper corrugated plate 2 and the lower corrugated plate 3 contact each other to form a cross contact point. One of the heat exchange plates 1 is rotated 180 degrees horizontally.

[0076] Specifically, a heat exchange unit consists of two stacked heat exchange plates 1. Channels for the heat exchange medium flow between the two plates 1. The heat exchange medium flows through these channels and, through the plates 1, exchanges heat with the outside world or adjacent heat exchange units, achieving the purpose of heat exchange. The upper corrugated plate 2 of the lower heat exchange plate 1 contacts the lower corrugated plate 3 of the upper heat exchange plate 1, forming a cross-contact point. These points are secured by welding to ensure the structural stability of the heat exchange unit. Adjacent heat exchange plates 1 form a 180-degree horizontal angle, resulting in the V-shaped corrugations intersecting each other. This ensures connectivity between the various flow channels, ensuring the passage of the heat exchange medium and ensuring full contact between the heat exchange medium and the corrugated plates, improving heat exchange efficiency.

[0077] As an optimization of this embodiment, the longitudinal length of one heat exchange plate 1 is smaller than that of the other heat exchange plate 1 , and the extension section 21 of one heat exchange plate 1 is located outside the extension section 21 of the other heat exchange plate 1 .

[0078] Specifically, the longitudinal lengths of the heat exchange plates 1 are slightly different, so that adjacent extension sections 21 can be staggered, which has a positioning effect and also facilitates fixing the adjacent extension sections 21 .

[0079] Specific working principle: After assembly is completed, the heat exchange medium is input into the circulation channel in the heat exchange unit through the corresponding input port, the heat exchange medium exchanges heat with the plate body, and is output from the corresponding output port after heat exchange. When the heat exchange plate 1 is damaged, the internal heat exchange medium leaks. For example, if the upper peak 8 of the upper corrugated body 5 is damaged, the heat exchange medium leaks to the first guide channel 10 and flows out through the first connecting channel 17.

[0080] Example 2

[0081] The specific working principle of this embodiment is substantially the same as that of embodiment 1, with the difference being the first connecting structure 16 .

[0082] Specific implementation examples Figure 4 As shown, the first connecting structure 16 includes N first connecting channels 17 distributed along the length of two adjacent first flow guiding channels 10. The first connecting channels 17 connect two adjacent first flow guiding channels 10, and N = 2. There are two first connecting channels 17, each located in the middle of the straight section of the V-shaped corrugated body.

[0083] Example 3

[0084] The specific working principle of this embodiment is basically the same as that of embodiment 2, and the difference lies in the first connecting structure 16 .

[0085] Specific implementation examples Figure 5 As shown, two first connecting channels 17 are provided and are respectively located at the two ends of the V-shaped corrugated body.

[0086] Example 4

[0087] The specific working principle of this embodiment is basically the same as that of Example 1, and the difference lies in the first guide channel 10 and the second guide channel 13.

[0088] Specific implementation examples Figure 6 As shown, the vertical cross-sections of the first guide channel 10 and the second guide channel 13 are both arc-top trapezoidal, that is, the lower crest 9 of the lower corrugated body 6 on the inner side of the first guide channel 10 is arc-shaped, and the upper trough 11 at the bottom of the upper corrugated body 5 of the second guide channel 13 is arc-shaped.

[0089] In this embodiment, two first branch channels 14 are provided on the inner wall of the first flow guide channel 10 along its circumference. The first branch channels 14 are formed at the angle between the arc-shaped lower corrugated body 6 and the upper corrugated body 5.

[0090] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A heat exchange plate, characterized in that: The invention comprises an upper corrugated plate (2) and a lower corrugated plate (3) which are stacked, wherein a plurality of corrugated groups (4) distributed in the transverse direction are provided between the upper corrugated plate (2) and the lower corrugated plate (3), wherein the corrugated group (4) comprises an upper corrugated body (5) of the upper corrugated plate (2) and a lower corrugated body (6) of the lower corrugated plate (3), wherein the upper corrugated body (5) and the lower corrugated body (6) are stacked, and a flow guide structure (7) is provided between the upper corrugated body (5) and the lower corrugated body (6) of at least one corrugated group (4), which can avoid mixing of fluids on both sides when the upper corrugated body (5) or the lower corrugated body (6) is damaged and can make the fluid entering between the upper corrugated body (5) and the lower corrugated body (6) flow out to the outside.

2. The heat exchange plate according to claim 1, characterized in that The flow guiding structure (7) comprises a first flow guiding channel (10) which is arranged between the peak of the upper wave crest (8) of the upper corrugated body (5) and the peak of the lower wave crest (9) of the lower corrugated body (6) and extends along the corrugation direction.

3. The heat exchange plate according to claim 2, characterized in that: A second flow guide channel (13) extending along the corrugation direction is provided between the bottom of the upper trough (11) of the upper corrugated body (5) and the bottom of the lower trough (12) of the lower corrugated body (6).

4. The heat exchange plate according to claim 3, characterized in that The inner wall of the first flow guide channel (10) is provided with at least one first flow branch channel (14) distributed along its circumference and extending along the corrugation direction; And / or, the inner wall of the second flow guide channel (13) is provided with at least one second flow branch channel (15) distributed along its circumference and extending along the corrugation direction.

5. The heat exchange plate according to claim 3, characterized in that: The cross-sectional area of ​​the first flow guiding channel (10) is equal to the cross-sectional area of ​​the second flow guiding channel (13); Alternatively, the cross-sectional area of ​​the first flow guiding channel (10) is greater than the cross-sectional area of ​​the second flow guiding channel (13); Alternatively, the cross-sectional area of ​​the first flow guiding channel (10) is smaller than the cross-sectional area of ​​the second flow guiding channel (13).

6. The heat exchange plate according to any one of claims 2 to 5, characterized in that: One of the two adjacent corrugation groups (4) is provided with the first guide channel (10). Alternatively, all corrugation groups (4) are provided with the first flow guiding channel (10).

7. The heat exchange plate according to claim 6, characterized in that The first guide channel (10) is closed at both ends, and two adjacent first guide channels (10) are connected via a first connecting structure (16) intersecting the corrugations, the first connecting structure (16) comprising N first connecting channels (17) distributed along the length direction of the two adjacent first guide channels (10), the first connecting channels (17) connecting the two adjacent first guide channels (10), and N ≥ 1; The number of first connecting channels (17) of two adjacent first communicating structures (16) is equal and arranged in a one-to-one correspondence; Alternatively, the numbers of the first connecting channels (17) of two adjacent first communicating structures (16) are different.

8. The heat exchange plate according to any one of claims 3 to 5, characterized in that: One of the two adjacent corrugation groups (4) is provided with the second flow guide channel (13). Alternatively, all corrugation groups (4) are provided with the second flow guiding channel (13).

9. The heat exchange plate according to claim 8, characterized in that: The second guide channel (13) is closed at both ends, and two adjacent second guide channels (13) are connected via a second connecting structure (18). The second connecting structure (18) includes M second connecting channels (19) distributed along the length direction of the two adjacent second guide channels (13). The second connecting channels (19) connect the two adjacent second guide channels (13), and M is ≥ 1. The number of the second connecting channels (19) of two adjacent second communicating structures (18) is equal and arranged in a one-to-one correspondence; Alternatively, the numbers of the second connecting channels (19) of two adjacent second communicating structures (18) are different.

10. The heat exchange plate according to any one of claims 1 to 5, characterized in that: The longitudinal ends of the upper corrugated plate (2) are each provided with flanges (20) connected to the lower corrugated plate (3) for closing the ends.

11. The heat exchange plate according to any one of claims 3 to 5, characterized in that: The upper corrugated body (5) and the lower corrugated body (6) are distributed in the horizontal direction, and the horizontal cross-sections of the upper corrugated body (5) and the lower corrugated body (6) are both V-shaped; The vertical cross-section of the first guide channel (10) is a flat-top trapezoid or a circular-arc-top trapezoid, and the vertical cross-section of the second guide channel (13) is a flat-top trapezoid or a circular-arc-top trapezoid.

12. A heat exchange unit, characterized in that: The heat exchange plate (1) comprises two heat exchange plates (1) as claimed in any one of claims 1 to 11, wherein the lower corrugated plate (3) of one heat exchange plate (1) is connected to the upper corrugated plate (2) of the other heat exchange plate (1), and the upper corrugated plate (2) and the lower corrugated plate (3) are in contact to form a cross contact point.

13. The heat exchange unit according to claim 12, characterized in that: One of the heat exchange plates (1) is rotated 180 degrees horizontally.

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