Plate heat exchanger
By employing a symmetrical heat exchange corrugated structure and arrow pattern design with different flow directions in the plate heat exchanger, the problem of large fluid pressure loss is solved, resulting in higher heat exchange performance and lower fluid resistance, thus improving the overall efficiency of the plate heat exchanger.
Patent Information
- Application Number
- CN202423148169.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-10-09
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-19
AI Technical Summary
While existing plate heat exchangers with a double herringbone corrugated structure offer good heat exchange performance, they also suffer from significant fluid pressure loss, making it difficult to reduce fluid pressure loss while simultaneously improving heat exchange capacity.
The heat exchanger employs a symmetrical corrugated structure. When the fluid flows to the symmetrical position, it is obstructed by the corrugations in the opposite direction, generating turbulence and improving the heat exchange capacity of the plate. Furthermore, by arranging arrow patterns with different flow directions in the same heat exchange unit, the direction of fluid flow can be changed, thereby reducing fluid resistance.
While maintaining smooth fluid flow, the overall heat exchange performance of the plate heat exchanger is significantly improved, and fluid pressure loss is reduced.
Smart Images
Figure CN223580741U_ABST
Abstract
Description
[0001] The present application claims priority to the Chinese patent application No. 202422437174.6, filed on October 09, 2024, and entitled "Plate heat exchanger", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD
[0002] The utility model relates to heat exchange device for refrigeration air conditioning and heat pump field, in particular to a kind of plate heat exchanger. BACKGROUND
[0003] Plate heat exchanger is widely used in refrigeration and heat exchange system with its compact structure and high heat exchange efficiency. Plate heat exchanger balances the heat exchange capacity of plate and the pressure loss of fluid by pressing corrugated structure to achieve better heat exchange effect. The heat exchange plate in the background technology adopts single heavy herringbone corrugation. When single heavy herringbone is arranged on a plate with large size specification, the large-span corrugation is beneficial to fluid distribution, and the pressure loss is small, but the heat exchange effect is poor. If double herringbone wave form is used, better heat exchange performance can be obtained, but the pressure loss of fluid will increase. SUMMARY
[0004] Therefore, it is necessary to provide a plate heat exchanger to solve the above problems. The heat exchange plate in the plate heat exchanger has a new corrugated structure, which improves the heat exchange capacity of the plate heat exchanger while reducing the pressure loss of fluid, so that the plate heat exchanger as a whole has good heat exchange performance.
[0005] To achieve the above technical purposes, the utility model adopts the following technical solutions:
[0006] A plate heat exchanger includes a heat exchange plate, the heat exchange plate includes a plate surface with a corrugated structure, the plate surface includes a distribution part and a heat exchange part, the distribution part includes a first distribution area and a second distribution area located at both ends of the plate surface in the length direction, and the heat exchange part is located between the first distribution area and the second distribution area, wherein:
[0007] The heat exchange part includes a heat exchange unit, the heat exchange unit extends from one side to the other side of the plate surface in the width direction; the heat exchange unit includes two first arrow patterns, and the two first arrow patterns are mirror-symmetric in the length direction of the plate surface; along the length direction of the plate surface, the heat exchange part includes at least two heat exchange units.
[0008] The plate heat exchanger in the utility model adopts symmetrical heat exchange corrugation in the heat exchange part, and different arrow patterns are arranged in the same heat exchange unit, so that the fluid is hindered by another flow direction corrugation when flowing to the symmetrical position, thereby generating turbulent flow, improving the plate heat exchange capacity, and improving the overall heat exchange performance of the plate heat exchanger. BRIEF DESCRIPTION OF DRAWINGS
[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. The drawings are merely used to show some embodiments of the present application, and are not intended to limit the embodiments of the present application to them. In the drawings:
[0010] Figure 1 It is a whole schematic view of the heat exchange plate in an embodiment of the present application;
[0011] Figure 2 It is Figure 1 It is a partial enlarged view of position A of the heat exchange plate in the embodiment;
[0012] Figure 3 It is Figure 1 It is another partial enlarged view of position A of the heat exchange plate in the embodiment;
[0013] Figure 4 It is a whole schematic view of the first heat exchange plate in another embodiment of the present application;
[0014] Figure 5 It is a whole schematic view of the second heat exchange plate in another embodiment of the present application;
[0015] Figure 6 It is Figure 5 It is a front view of the second heat exchange plate in the embodiment;
[0016] Figure 7 It is Figure 6 It is a partial enlarged view of position B in the embodiment;
[0017] Figure 8 It is a schematic view of the heat exchange plate in the overlapping state in another embodiment of the present application;
[0018] Figure 9 It is Figure 8 It is a partial enlarged view of position C in the embodiment.
[0019] In the drawings:
[0020] 1, heat exchange plate; 100, plate surface; 10, distribution part; 11, first distribution area; 12, second distribution area; 13, port hole; 14, distribution corrugated part; 141, herringbone corrugated area; 142, first corrugated area; 143, second corrugated area;
[0021] 20, heat exchange part; 200, heat exchange unit; 21, first arrow pattern; 22, second arrow pattern; 23, first axis; 24, second axis;
[0022] 110, first heat exchange plate; 111, first distribution part; 112, first heat exchange part;
[0023] 120. Second heat exchange plate; 121. Second distribution section; 122. Second heat exchange section. Detailed Implementation
[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other technical solutions obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] In the accompanying drawings, shapes and dimensions may be enlarged for clarity, and the same reference numerals will be used in all figures to indicate the same or similar parts.
[0026] In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, and lower are defined relative to the structure shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other orientations should not be interpreted as restrictive terms.
[0027] Terms involving attachment, connection, etc., refer to the relationship in which these structures are fixed or restrained by direct connection to each other or by indirect connection through intermediate structures, as well as movable or rigid attachment, unless otherwise clearly stated.
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0029] To achieve the above-mentioned objectives and other advantages of this utility model, the present utility model provides the following technical solution:
[0030] On the one hand, such as Figures 1 to 9 As shown, this utility model provides a plate heat exchanger, including heat exchange plates 1. The heat exchange plates include a plate surface 100 with a corrugated structure. The plate surface 100 includes a distribution section 10 and a heat exchange section 20. The distribution section 10 includes a first distribution area 11 and a second distribution area 12 located at two ends along the length of the plate surface 100, respectively. The heat exchange section 20 is located between the first distribution area 11 and the second distribution area 12. Specifically:
[0031] like Figure 2 , Figure 3As shown in the figure, the distribution part 10 comprises a port hole 13 and a distribution corrugated part 14. The distribution corrugated part 14 is arranged around the port hole 13. The distribution corrugated part 14 comprises a herringbone corrugated area 141, a first corrugated area 142 and a second corrugated area 143 located on both sides of the herringbone corrugated area 141. The first corrugated area 142 and the second corrugated area 143 are mirror symmetrical in the width direction of the plate surface 100. The first corrugated area 142 and the second corrugated area 143 are both arranged with inclined corrugations, and the included angle formed by the inclined corrugations and the length direction edge of the plate surface 100 is an acute angle. Defining the included angle of the herringbone corrugations in the herringbone corrugated area 141 as d, and the acute included angle of the inclined corrugations in the first corrugated area 142 or the second corrugated area 143 as c, then d>2c. The acute angle c of the inclined corrugations is reduced relative to the herringbone angle c of the herringbone corrugated area 141, which can change the flow direction of the fluid, guide the herringbone corrugated area 141 to the direction of the heat exchange part 20, and is beneficial to the uniform distribution of the fluid; compared with the herringbone corrugated area 141, the included angle d of the inclined corrugations is smaller, which can increase the number of welding points at the positions of the first corrugated area 142 and the second corrugated area 143, and play a role in strengthening the connection. Further, in the heat exchange unit 200 adjacent to the distribution part 10 in the scheme, the first arrow pattern 21 adjacent to the herringbone corrugated area 141 has a different opening direction from the herringbone corrugations, which further changes the flow direction of the fluid and is beneficial to the uniform distribution of the fluid in the entire heat exchange part 20.
[0032] The heat exchange part 20 comprises a heat exchange unit 200, and the heat exchange unit 200 extends from one side to the other side in the width direction of the plate surface 100. The heat exchange unit 200 comprises two first arrow patterns 21, and the two first arrow patterns 21 are mirror symmetrical in the length direction of the plate surface 100. (It should be noted that all the thickened axes and arrow patterns in the drawings of the utility model are only position indications, and do not represent actual product features)
[0033] In an embodiment, as shown in the figure, Figure 2 As shown in the figure, the heat exchange unit 200 comprises two first arrow patterns 21, and the two first arrow patterns 21 are symmetrical about a first axis 23, and the first axis 23 is parallel to the width direction edge of the plate surface 100. The first axis 23 is located at the position where the corrugations of the two first arrow patterns are adjacent.
[0034] Through the above structural design, the opposite arrow patterns can guide the fluid from the distribution part (10) to the width direction of the plate surface 100, and change the flow direction of the fluid at the symmetrical position of the two arrow patterns, so that the fluid generates turbulent flow, while maintaining the smooth flow of the fluid under the condition of small flow resistance, the heat exchange capacity of the plate is improved.
[0035] It should be noted that the arrow pattern in the utility model refers to the corrugated structure having different directions of angles to distribute fluid to different directions, and the arrow pattern can be designed as discontinuous inclined corrugation for the same purpose.
[0036] Further, as shown in Figure 2 、 Figure 7 The first axis 23 is the middle line of the length direction of the heat exchange zone 200, and the first arrow pattern 21 can be arranged to point towards each other or away from each other, that is, the opening angle of the two first arrow patterns 21 can be opposite or opposite. When the sheet is pressed into corrugations of different angles, it can be divided into large-angle corrugations with large inclination angles and small-angle corrugations with small inclination angles. The large-angle corrugation is characterized by increasing fluid resistance and enhancing heat exchange capacity, and the small-angle corrugation is characterized by reducing fluid resistance and improving sheet heat transfer capacity. Selecting a suitable corrugation inclination angle is beneficial to balance the fluid resistance and heat exchange effect. The opening angle of the first arrow pattern 21 (if it is an inclined corrugation, it is the included angle of the opposite inclined corrugation) is defined as a, and the inclination range of the included angle a is 120°-150°, so that the fluid can flow at a large angle and be quickly distributed.
[0037] The angle a in the utility model is preferably 130 degrees.
[0038] In an embodiment, as shown in Figure 7 The heat exchange part 20 comprises at least two heat exchange units 200, and the heat exchange units 200 are arranged along the length direction of the plate surface 100. The heat exchange unit 200 further comprises a second arrow pattern 22 and a second axis 24. The second axis 24 is parallel to the length direction of the edge of the plate surface 100. The two second arrow patterns 22 are symmetrical about the second axis 24. Preferably, the second axis 24 is the middle line of the width direction of the heat exchange unit 200. The first arrow pattern 21 and the second arrow pattern 22 are arranged adjacent to each other, and the opening angle of the second arrow pattern 22 is defined as b, then a+b=180°. Similarly, the second arrow pattern 22 can also be designed as discontinuous inclined corrugation. Through the above structure design, the fluid in the heat exchange unit 200 flows along the "X" shaped corrugation, which can generate a larger turbulent flow at the symmetrical center position, thereby improving the heat exchange efficiency of the heat exchange unit 200.
[0039] Further, along the length direction of the plate surface 100, the first arrow pattern 21 of the two heat exchange units 200 adjacent to each other point in opposite directions, changing the flow direction of the fluid. Preferably, the adjacent heat exchange units 200 are arranged in mirror symmetry about the width direction of the plate surface 100, and at the joint position of the adjacent heat exchange units 200, the flow direction of the fluid is deflected, which can increase the convection heat exchange intensity of the plate sheet and improve the heat exchange performance. On the other hand, the two adjacent heat exchange units 200 can also change the wave angle of the arrow pattern or the length of the heat exchange unit 200 according to the actual design needs on the premise that the first arrow pattern 21 of the adjacent heat exchange units 200 point in opposite directions, for example, the wave angle of the arrow pattern near the fluid inlet end is larger to increase the flow resistance and improve the heat exchange, and the wave angle of the arrow pattern near the fluid outlet end is relatively smaller to make the fluid flow out smoothly, etc.
[0040] In an embodiment, as shown in Figure 8 、 Figure 9 , the corrugation height of the distribution part 10 of the heat exchange plate sheet 1 is equal, and the corrugation of the heat exchange part 20 is arranged alternately with high corrugation and low corrugation, and the height of the high corrugation is equal to the corrugation height of the distribution part 10. The corrugation with different heights is beneficial to increase the turbulent flow and improve the heat exchange capacity of the plate sheet.
[0041] In an embodiment, as shown in Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 , the heat exchange plate sheet 1 includes a first heat exchange plate sheet 110 and a second heat exchange plate sheet 120, and the first heat exchange plate sheet 110 and the second heat exchange plate sheet 120 are superimposed, and a single-layer fluid channel is formed between the adjacent first heat exchange plate sheet 110 and the second heat exchange plate sheet 120. The specific structure of the first heat exchange plate sheet 110 is as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , and the specific structure of the second heat exchange plate sheet 120 is as shown in Figure 5 、 Figure 6 、 Figure 7As shown in the drawings; define the distribution part 10 in the first heat exchange sheet 110 as a first distribution part 111, and the heat exchange part 20 as a first heat exchange part 112; define the distribution part 10 in the second heat exchange sheet 120 as a second distribution part 121, and the heat exchange part 20 as a second heat exchange part 122; the second distribution part 121 is opposite to the first distribution part 111, and the second heat exchange part 122 is opposite to the first heat exchange part 112; the projection of the corrugated structure at the opposite position of the first heat exchange sheet 110 and the second heat exchange sheet 120 in the stacking direction of the heat exchange sheet 1 is staggered. That is, when the first heat exchange sheet 110 and the second heat exchange sheet 120 are stacked, the distribution part 10 is in position correspondence, and the herringbone wave opening faces in opposite directions; the arrow pattern in the heat exchange part 20 is in position correspondence, the arrow pattern points in different directions, the included angle is equal, which is beneficial to form regular and uniform heat exchange channels, and is beneficial to improve the heat exchange efficiency of the sheet and prevent freezing.
[0042] Through the above structural design, the heat exchange sheet 1 in the utility model is in zonal correspondence when stacked, the corrugated inclined directions are different, different sheets are easy to distinguish, and the multiple layers are not easy to be reversed or misassembled when stacked.
[0043] Further, as shown in the drawings, Figure 2 , Figure 7 The heat exchange unit of the first heat exchange sheet 110 includes a group of oppositely arranged first arrow patterns 21, and the heat exchange unit 200 of the second heat exchange sheet 120 includes a group of first arrow patterns 21 arranged opposite to each other along the width direction of the plate surface 100 and a group of second arrow patterns 22 arranged opposite to each other along the length direction of the plate surface 100. The first arrow pattern 21 in the second heat exchange sheet 120 points in the opposite direction of the first arrow pattern 21 in the first heat exchange sheet 110. Actually, the second arrow pattern 22 in the second heat exchange sheet 120 is also connected by the inclined corrugation opposite to the inclined direction of the first arrow pattern 21 in the first heat exchange sheet 110, that is, whether the continuous or not of the inclined corrugation can achieve the same technical effect. Correspondingly, the first arrow pattern 21 in the first heat exchange sheet 110 can also be partially or entirely arranged to be disconnected in the length direction of the plate surface 100 and connected in the width direction of the plate surface 100, and similar deformations will not be described here.(It should be understood that the different inclined directions in the utility model refer to the different flow directions of the corrugation guided fluid, that is, the difference between the corrugation inclined direction from the upper left of the plate surface 100 to the lower right and the corrugation inclined direction from the upper right of the plate surface 100 to the lower left)
[0044] Further to the scheme, the first heat exchange plate 110 and the second heat exchange plate 120 can be selected with different corrugation heights according to different heat exchange requirements. Specifically, define the distribution part 10 in the first heat exchange plate 110 as a first distribution part 111, and the heat exchange part 20 as a first heat exchange part 112; define the distribution part 10 in the second heat exchange plate 120 as a second distribution part 121, and the heat exchange part 20 as a second heat exchange part 122. When the first heat exchange plate 110 and the second heat exchange plate 120 are combined, the following can be selected (only one embodiment is shown in the figure):
[0045] (1) The corrugation height of the first heat exchange part 112 and the first distribution part 111 is equal; the corrugation height of the second heat exchange part 122 and the second distribution part 121 is equal, and the corrugation height of the first heat exchange part 112 and the second heat exchange part 122 is equal.
[0046] (2) As shown in Figure 8 , Figure 9 , the corrugation height of the first heat exchange part 112 and the first distribution part 111 is equal; the corrugation height of the second distribution part 121 is equal to the corrugation height of the first distribution part 111; the corrugation of the second heat exchange part 122 is arranged alternately with high waves and low waves, and the height of the high waves is equal to the corrugation height of the second distribution part 121. Several first heat exchange plates 110 and second heat exchange plates 120 overlap to form asymmetric channels with different internal volumes. Generally, the channel with larger volume is the water side channel, and the channel with smaller volume is the refrigerant channel, which reduces the refrigerant charge and reduces the water side pressure drop to improve the heat exchange performance.
[0047] (3) The corrugation of the first heat exchange part 112 is arranged alternately with high waves and low waves, and the height of the high waves is equal to the corrugation height of the first distribution part 111; the corrugation of the second heat exchange part 122 is arranged alternately with high waves and low waves, and the height of the high waves is equal to the corrugation height of the second distribution part 121. Several first heat exchange plates 110 and second heat exchange plates 120 overlap to form asymmetric channels with different internal volumes. Both plates are arranged alternately with high and low waves, which increases the difference between the internal volumes of different flow channels and further reduces the refrigerant charge and the water side pressure drop.
[0048] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.
[0049] The principles and implementation manners of the present application are described by using specific examples above, and the above examples are only used for helping to understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.
Claims
1. A plate heat exchanger comprising a heat exchange plate (1), the heat exchange plate (1) comprising a plate face (100) having a corrugated structure, the plate face (100) comprising a distribution portion (10) and a heat exchange portion (20), the distribution portion (10) comprising a first distribution area (11) and a second distribution area (12) respectively located at both ends of the plate face (100) in the length direction, and the heat exchange portion (20) being located between the first distribution area (11) and the second distribution area (12), characterized in that, the heat exchange portion (20) comprises a heat exchange unit (200) extending from one side to the other side of the plate face (100) in the width direction, the heat exchange unit (200) comprises two first arrowhead patterns (21), the two first arrowhead patterns (21) being mirror symmetrical in the length direction of the plate face, and the heat exchange portion (20) comprises at least two heat exchange units (200) in the length direction of the plate face. The two adjacent heat exchange units (200) are mirror symmetrical.
2. The plate heat exchanger according to claim 1, characterized in that The two first arrowhead patterns (21) point to each other.
3. The plate heat exchanger according to claim 1, characterized in that The two first arrowhead patterns (21) point away from each other.
4. The plate heat exchanger according to claim 1, characterized in that The heat exchange unit (200) further comprises two second arrowhead patterns (22), the two second arrowhead patterns (22) being mirror symmetrical in the width direction of the plate face.
5. The plate heat exchanger according to claim 2, characterized in that The opening angle of the first arrowhead pattern (21) and the opening angle of the second arrowhead pattern (22) are complementary.
6. The plate heat exchanger according to claim 5, characterized in that The opening angle of the first arrowhead pattern (21) ranges from 120° to 150°.
7. A plate heat exchanger according to claim 6, characterised in that The distribution portion (10) comprises a port hole (13) and a distribution corrugated portion (14), the distribution corrugated portion (14) being arranged around the port hole (13), the distribution corrugated portion (14) comprising a herringbone corrugated area (141), a first corrugated area (142) and a second corrugated area (143), the first corrugated area (142) and the second corrugated area (143) being located on both sides of the herringbone corrugated area (141) in the width direction of the plate face (100), the first corrugated area (142) and the second corrugated area (143) are both arranged with inclined corrugations, and the first corrugated area (142) and the second corrugated area (143) are mirror symmetrical in the width direction of the plate face (100).
8. A plate heat exchanger according to any of the claims 1-7, characterised in that The acute angle formed by the inclined corrugation and the edge of the plate face (100) in the length direction adjacent to the inclined corrugation is defined as c, and the herringbone opening angle of the herringbone corrugated area (141) is defined as d, then d>2c.
9. The plate heat exchanger according to claim 8, characterized in that The heat exchange plate (1) comprises a first heat exchange plate (110) and a second heat exchange plate (120), the first heat exchange plate (110) and the second heat exchange plate (120) being superimposed, the inclined angles of the corrugated structures in the opposite regions of the first heat exchange plate (110) and the second heat exchange plate (120) are equal, and the inclined directions are staggered.
10. The plate heat exchanger according to claim 9, characterized in that 11. The plate heat exchanger according to claim 10, characterized in that The heat exchange part (20) in the first heat exchange plate (110) is defined as a first heat exchange part (112), and the distribution part (10) is defined as a first distribution part (111); the heat exchange part (20) in the second heat exchange plate (120) is defined as a second heat exchange part (122), and the distribution part (10) is defined as a second distribution part (121); the corrugation height of the first heat exchange part (112) and the first distribution part (111) is equal; the second heat exchange part (122) has two corrugation heights, and the height of the higher corrugation is equal to the corrugation height of the second distribution part (121).