Heat exchange plate and heat exchange unit

Abstract

The invention 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 the two sides due to 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 present invention 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] The heat exchange plate is the most important heat exchange component of the plate heat exchanger. Its heat transfer efficiency and flow resistance basically determine the thermal performance of the plate heat exchanger.

[0003] There are two types of plate types commonly used in existing plate heat exchangers, namely single-plate herringbone plate and double-plate herringbone plate. However, when a single-layer plate heat exchanger is subjected to excessive pressure, fatigue, corrosion, ice breakage, etc., it may cause internal leakage and cause the fluids on both sides to mix, affecting the heat exchange performance. Moreover, in some specific applications, different heat exchange media may flow on both sides. If mixed, it may cause contamination of the heat exchange medium and even affect safety. Summary of the invention

[0004] The purpose of the present invention 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 the invention, the following technical solutions can be used:

[0006] A heat exchange plate comprises an upper corrugated plate and a lower corrugated plate which are stacked, a plurality of corrugated groups distributed in the transverse direction are arranged between the upper corrugated plate and the lower corrugated plate, the corrugated groups comprise an upper corrugated body of the upper corrugated plate and a lower corrugated body of the lower corrugated plate, the upper corrugated body and the lower corrugated body are stacked, and a flow guide structure is arranged 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 make the fluid entering between the upper corrugated body and the lower corrugated body 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, and 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 timely guide the leaked heat exchange medium to prevent the mixing of the media on both sides. 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 which is arranged 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 extends along the corrugation direction.

[0009] The first guide channel is located between the peak of the upper wave crest and the peak of the lower wave crest. 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 sealingly connected to the upper surface of the lower corrugated plate except for the first guide channel.

[0011] The upper corrugated plate and the lower corrugated plate are tightly fitted in most areas, ensuring the formation of the first guide channel, ensuring that the leaked heat exchange medium can be promptly guided out when diversion is required, and the fitting method allows the two to support each other, improving the structural strength, ensuring efficient heat exchange, and reducing the impact on heat exchange performance. In addition, it also 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 position between the upper corrugated plate and the lower corrugated plate.

[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 flow guiding structures may be provided not only at the wave crests but also at the wave troughs, specifically, a second flow guiding channel provided between the upper wave trough and the lower wave trough, and the second flow guiding channel is the same as the first flow guiding channel.

[0014] As an optimization, the area 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 tightly sealed and connected.

[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 the structural strength and the 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 flow diversion channel is arranged on the inner wall of the first flow guide channel, and is axially extended and circumferentially distributed, and plays a diversion role together with the main part of the first flow guide channel. Specifically, the first flow diversion channel is generated by the different cross-sectional shapes of the first flow guide channel. For example, the top shape of the lower corrugated body inside the first flow guide channel can be flat, boss-shaped, two-stage step-shaped, arc-shaped, trapezoidal, concave, etc., and the first flow diversion channel 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 second flow diversion channel is the same.

[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. The main purpose is to smoothly guide out the leaked heat exchange medium, and the arrangement is flexible and free.

[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 in a planar shape, that is, the two crests are flat and parallel to each other, and the spacing between the two crests is between 0.2-1mm to ensure a good and sufficient flow guiding effect, and the spacing is preferably 0.2-0.5mm to ensure heat exchange performance. The upper and lower corrugated bodies are arranged in the same manner.

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

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

[0024] In the above heat exchange plate, the first flow guide channel is closed at both ends, and two adjacent first flow guide channels are connected by a first connecting structure intersecting with the corrugations, and the first connecting structure includes N first connecting channels distributed along the length direction of the two adjacent first flow guide channels, and the first connecting channel connects the two adjacent first flow guide channels, and N≥1. The number of first connecting channels of two adjacent first connecting structures is equal and arranged in one-to-one correspondence; or, the number of first connecting channels of two adjacent first connecting structures is unequal.

[0025] The first connecting structure is used to guide the leaked medium in the first flow guide channel. One or more first connecting channels can be provided to improve the efficiency of guiding the heat exchange medium. The number of first connecting channels of adjacent first connecting structures is the same and corresponds one to one, which ensures that the flow rate of the leaked fluid of adjacent first connecting structures is the same, thereby improving the efficiency of guiding the leaked fluid. Of course, the first connecting channels can also be different, and the setting is flexible and free on the basis of ensuring the effect of guiding the leaked fluid.

[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 arranged on each corrugation group, or can be arranged at intervals, similar to the first guide channel.

[0028] In the above heat exchange plate, the second flow guide channel is closed at both ends, and two adjacent second flow guide channels are connected by a second connecting structure, and the second connecting structure includes M second connecting channels distributed along the length direction of the two adjacent second flow guide channels, and the second connecting channel connects the two adjacent second flow guide channels, and M≥1. The number of second connecting channels of two adjacent second connecting structures is equal and arranged in one-to-one correspondence; or, the number of second connecting channels of 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 channel also has 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 part 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 connecting multiple heat exchange plates when they 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 rounded-top trapezoid, and the vertical cross-section of the second guide channel is a flat-top trapezoid or a rounded-top trapezoid.

[0035] The corrugated body is V-shaped, which is conducive to guiding the heat exchange medium to both sides after 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. In addition, the cross-section of the guide channel is preferably a trapezoid, but it can also be other suitable shapes. The trapezoid can be a flat top or an arc top. The arc top here can be the upper bottom and / or lower bottom of the trapezoid, with various forms and flexible settings.

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

[0037] In order to achieve the purpose of the innovative present invention, 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 is composed of two stacked heat exchange plates. A related 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 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 the cross contact point to fix the two heat exchange plates to ensure the structural stability of the heat exchange unit.

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

[0041] There is a 180-degree angle between adjacent heat exchange plates in the horizontal direction, which makes the V-shaped corrugated bodies cross 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 body, thereby improving the heat exchange efficiency.

[0042] As an optimization, the longitudinal length of one heat exchange plate is smaller than the longitudinal length of another heat exchange plate, and the extension section of one heat exchange plate is located outside the extension section of another heat exchange plate, ensuring that adjacent extension sections can be staggered, having a positioning effect, and also facilitating the fixing of adjacent extension sections.

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

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

[0045] 2. The upper corrugated plate and the lower corrugated plate fit closely 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, boss, two-stage step, arc, trapezoid, 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, and 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 out of 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 flow 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 is a schematic structural diagram of a heat exchange unit provided by the present invention (Example 1);

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

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

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

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

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

[0056] In the figure, a heat exchange plate 1, an upper corrugated plate 2, a lower corrugated plate 3, a corrugated group 4, an upper corrugated body 5, a lower corrugated body 6, a guide structure 7, an upper crest 8, a lower crest 9, a first guide channel 10, an upper trough 11, a lower trough 12, a second guide channel 13, a first branch channel 14, a second branch channel 15, a first connecting structure 16, a first connecting channel 17, a second connecting structure 18, a second connecting channel 19, a flange 20, and an 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 example of the heat exchange plate 1 provided by the present invention is Figure 1-3 As shown, it includes an upper corrugated plate 2 and a lower corrugated plate 3 stacked together, a plurality of corrugated groups 4 distributed in the transverse direction are arranged 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 flow guide structure 7 is arranged 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 make the fluid entering between the upper corrugated body 5 and the lower corrugated body 6 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, and 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 stacking of the upper corrugated plate 2 and the lower corrugated plate 3 is 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 timely guide the leaked heat exchange medium to prevent the mixing of the media on both sides. 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 3As shown, the flow guiding structure 7 includes a first flow guiding channel 10 disposed 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 extending along the corrugation direction. The lower surface of the upper corrugated plate 2 and the upper surface of the lower corrugated plate 3 are closely connected and sealed except for the first flow guiding channel 10.

[0062] Specifically, the first flow guide channel 10 is located between the peak of the upper wave crest 8 and the peak of 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 being able to timely guide 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 fit tightly in most areas, ensuring the formation of the first flow guide channel 10, ensuring that the leaked heat exchange medium can be guided out in time when diversion is required, and the fitting method allows the two to support each other, improving the structural strength, and ensuring efficient heat exchange, reducing the impact on heat exchange performance. In addition, it also 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 position 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 the first guide channel 10 and the second guide channel 13 are all tightly connected and sealed.

[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 diverter 14 is arranged on the inner wall of the first flow guiding channel 10, and extends axially and is distributed circumferentially, and plays a role of guiding together with the main part of the first flow guiding channel 10. Specifically, the first flow diverter 14 is generated by the different cross-sectional shapes of the first flow guiding channel 10. In this embodiment, the top shape of the lower corrugated body 6 inside the first flow guiding channel 10 is a plane shape, and the cross section of the first flow guiding channel 10 is a trapezoidal shape, and the first flow diverter 14 is formed at the four corners of the trapezoid. The second flow diverter 15 is similar.

[0066] In this embodiment, the cross-sectional area of ​​the first guide channel 10 is equal to the cross-sectional area of ​​the second guide channel 13. The distance between the peak of the upper crest 8 of the upper corrugated body 5 and the peak of the lower crest 9 of the lower corrugated body 6 is 0.2-0.5 mm; the distance 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 peaks of the upper wave crest 8 and the lower wave crest 9 are planar, that is, the two peaks are flat and parallel to each other, and the distance between the two peaks is between 0.2-0.5mm, which ensures the heat exchange performance. The upper wave valley 11 is arc-shaped, and the lower wave valley 12 is planar.

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

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

[0070] Similarly, all corrugation groups 4 are provided with a second flow guiding channel 13. The second flow guiding channel 13 is closed at both ends, and two adjacent second flow guiding channels 13 are connected by 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 flow guiding channels 13. The second connecting channel 19 connects the two adjacent second flow guiding channels 13, and M=1. The number of second connecting channels 19 of two adjacent second connecting structures 18 is equal, and they are arranged one by one. Moreover, in this embodiment, the first connecting channel 17 and the second connecting channel 19 are realized by 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 the flange 20 is provided with an extension section 21.

[0072] Specifically, the flange 20 is 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. The flange 20 extends in the vertical direction, and the extended part is the extension section 21, which ensures complete closure and facilitates the fixed connection between the flange 20 and the upper corrugated plate 2 and the lower corrugated plate 3. It can also be used for positioning and connection when multiple heat exchange plates 1 are stacked for use.

[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 the 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 present invention is as follows: Figure 1 As shown, it includes two heat exchange plates 1, and 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 contacts the lower corrugated plate 3 to form a cross contact point. One of the heat exchange plates 1 is rotated 180 degrees horizontally.

[0076] Specifically, a heat exchange unit is composed of two stacked heat exchange plates 1. A relevant channel for the circulation of heat exchange medium is formed between the two heat exchange plates 1. The heat exchange medium flows through the channel and exchanges heat with the outside or adjacent heat exchange units through the plate body of the heat exchange plate 1 to achieve 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 to form a cross contact point, which is fixed by welding to ensure the structural stability of the heat exchange unit. There is a 180-degree angle in the horizontal direction between adjacent heat exchange plates 1, that is, the V-shaped corrugated bodies intersect 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 body, thereby improving the 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 is also convenient for 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 wave crest 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, except for 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 direction of two adjacent first flow guiding channels 10. The first connecting channels 17 connect the two adjacent first flow guiding channels 10, and N = 2. There are two first connecting channels 17, and they are respectively 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 substantially the same as that of Embodiment 2, except for 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 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 Embodiment 1, except that 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 inside 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 flow-dividing channels 14 are arranged on the inner wall of the first flow-guiding channel 10 along the circumference thereof. The first flow-dividing 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 examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed 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, a plurality of corrugated groups (4) distributed in the transverse direction are arranged between the upper corrugated plate (2) and the lower corrugated plate (3), 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), the upper corrugated body (5) and the lower corrugated body (6) are stacked, and a flow guide structure (7) is arranged 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 in 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 guiding 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 guiding 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 flow 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 flow guiding channels (10) are closed at both ends, and two adjacent first flow guiding 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 flow guiding channels (10), the first connecting channels (17) connecting the two adjacent first flow guiding channels (10), and N ≥ 1; The number of first connecting channels (17) of two adjacent first connecting 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: The second flow guide channel (13) is provided on one of the two adjacent corrugation groups (4). 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 flow guiding channels (13) are closed at both ends, and two adjacent second flow guiding channels (13) are connected via a second connecting structure (18), wherein the second connecting structure (18) comprises M second connecting channels (19) distributed along the length direction of the two adjacent second flow guiding channels (13), and the second connecting channels (19) connect the two adjacent second flow guiding channels (13), and M≥1; The number of second connecting channels (19) of two adjacent second connecting 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 a flange (20) connected to the lower corrugated plate (3) for closing the end.

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 flow guiding channel (10) is a flat-top trapezoid or a rounded-top trapezoid, and the vertical cross-section of the second flow guiding channel (13) is a flat-top trapezoid or a rounded-top trapezoid.

12. A heat exchange unit, characterized in that: It 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) contacts the lower corrugated plate (3) 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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