Heat exchanger plate and plate heat exchanger
Patent Information
- Application Number
- CN202522398035.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-11
AI Technical Summary
[0003]本实用新型提出一种换热器板片及板式换热器，旨在解决板式换热器进水阻力较大的问题
[0014]为了解决换热流体进水阻力较大的问题，本实用新型换热器板片在板片主体的表面凹设有凹槽以形成连通所述进水口和所述出水口的水流通道。也就是说，本实用新型换热器板片中的水流通道为凹槽结构，水流通道的底面低于板片主体所在的平面，换热流体从进水口流出时不会面临波纹凸起的阻挡，能够大幅降低换热流体的压降与泵耗。与此同时，水流通道至少设有两条，两条及两条以上的水流通道交叉形成有交汇点，其中一条水流通道中的流体流至交叉口时，既可以沿着原水流通道的路径继续向前流动，也可以在无任何竖向壁面的阻挡下分流至另外一条水流通道，使得换热流体的流动具有更高的自由度。
Smart Images
Figure CN224921027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, and in particular to a heat exchanger plate and a plate heat exchanger. Background Technology
[0002] Plate heat exchangers consist of stacked metal heat exchange plates with corrugated protrusions. The fluid undulates periodically along the corrugations to ensure turbulence and improve heat exchange efficiency. However, the inlet area experiences significant resistance to fluid flow due to the corrugated protrusions, resulting in higher energy consumption. Utility Model Content
[0003] This utility model proposes a heat exchanger plate and a plate heat exchanger, aiming to solve the problem of high water inlet resistance in plate heat exchangers.
[0004] The heat exchanger plate provided by this utility model includes a plate body, with an inlet and an outlet respectively provided at opposite ends of the plate body. The surface of the plate body is recessed with grooves to form a water flow channel connecting the inlet and the outlet. At least two water flow channels are provided, and the at least two water flow channels intersect to form a confluence point.
[0005] In one embodiment, the water flow channel includes an inlet section and a heat exchange section. The inlet section is arranged in a straight line toward the inlet, and the heat exchange section is connected to the end of the inlet section away from the inlet. The heat exchange sections intersect to form a junction point.
[0006] In one embodiment, the heat exchange section is curved, and the heat exchange sections of at least two water flow channels intersect to form an array of intersection points.
[0007] In one embodiment, the water flow channel further includes an outlet section, which is connected to the end of the heat exchange section away from the inlet section and communicates with the outlet; the plate body has a heat exchange area and an inlet area and an outlet area located at both ends of the heat exchange area, the inlet is located in the inlet area, the outlet is located in the outlet area, the water flow channel is formed in the heat exchange area, the inlet section extends to the inlet area, and the outlet section extends to the outlet area.
[0008] In one embodiment, the water outlet section is arranged in a straight line.
[0009] In one embodiment, the bottom surface of the water inlet area is an inclined surface, with the end of the inclined surface away from the heat exchange area being higher and the end closer to the heat exchange area being lower, and the water inlet is located at the end of the inclined surface away from the heat exchange area.
[0010] In one embodiment, the inlet section, the heat exchange section, and the outlet section are arranged sequentially along the length of the plate body. The projected length of the inlet section along the length of the plate body is L1, the projected length of the heat exchange section along the length of the plate body is L2, and the projected length of the outlet section along the length of the plate body is L3. L1 / L2≤1 / 20, L3 / L2≤1 / 20.
[0011] In one embodiment, the cross-sectional area of the inlet section is larger than that of the heat exchange section.
[0012] In one embodiment, the cross-sectional area of the inlet section gradually narrows from the end near the inlet to the end away from the inlet.
[0013] This utility model also proposes a plate heat exchanger, which includes a heat exchanger body composed of several heat exchanger plates stacked in sequence as described above.
[0014] To address the issue of high inlet resistance for the heat exchange fluid, this invention features heat exchanger plates with recessed grooves on their surfaces to form water flow channels connecting the inlet and outlet. In other words, the water flow channels in the heat exchanger plates are grooved structures, with the bottom surface of the channels lower than the plane of the plate body. This prevents the heat exchange fluid from encountering corrugated protrusions when flowing out of the inlet, significantly reducing pressure drop and pump consumption. Furthermore, at least two water flow channels are provided, intersecting to form a junction. When fluid in one channel reaches the junction, it can either continue along its original path or branch off into another channel without any vertical obstruction, allowing for greater freedom of flow for the heat exchange fluid. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a top view of an embodiment of the heat exchanger plate provided by this utility model.
[0017] Explanation of reference numerals in the attached figures: 1. Plate body; 11. Water inlet area; 12. Heat exchange area; 13. Water outlet area; 2. Water inlet; 3. Water outlet; 4. Water flow channel; 41. Water inlet section; 42. Heat exchange section; 43. Water outlet section; 5. First rib; 6. First slow water zone; 7. Second rib; 8. Second slow water zone. Detailed Implementation
[0018] 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.
[0019] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.
[0020] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0021] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.
[0022] This utility model proposes a heat exchanger plate and a plate heat exchanger, aiming to solve the problem of high water inlet resistance in plate heat exchangers.
[0023] like Figure 1 As shown, an embodiment of the heat exchanger plate of this utility model includes a plate body 1. The plate body 1 has an inlet 2 and an outlet 3 at opposite ends. The surface of the plate body 1 is recessed with grooves to form a water flow channel 4 connecting the inlet 2 and the outlet 3. There are at least two water flow channels 4, and the at least two water flow channels 4 intersect to form a confluence point.
[0024] Specifically, the plate body 1 can be stamped from metals or metal alloys such as copper, iron, stainless steel, and copper alloys, thus ensuring good thermal conductivity and corrosion resistance. The plate body 1 has inlets 2 and outlets 3 at opposite ends along its length or width. In traditional heat exchanger plates, the surface of the plate body is formed with an undulating corrugated structure through a stamping process. The heat exchange fluid flows in from the inlet and then flows periodically along the corrugated structure towards the outlet. The heat exchange fluid can be liquid or gas. At the moment of exiting the inlet, the flow resistance is relatively high due to the obstruction of the corrugated protrusions, resulting in high energy consumption.
[0025] To address the issue of high resistance to the inlet water of the heat exchanger, the heat exchanger plates of this invention have recessed grooves on the surface of the plate body 1 to form a water flow channel 4 connecting the inlet 2 and the outlet 3. In other words, the water flow channel 4 in the heat exchanger plates of this invention has a grooved structure, and the bottom surface of the water flow channel 4 is lower than the plane of the plate body 1. When the heat exchanger fluid flows out from the inlet 2, it will not face obstruction from the corrugated protrusions, significantly reducing the pressure drop and pump consumption of the heat exchanger fluid. Simultaneously, at least two water flow channels 4 are provided, and two or more water flow channels 4 intersect to form a junction point. When the fluid in one water flow channel 4 reaches the junction, it can either continue flowing along the original path of the original water flow channel 4, or it can be diverted to another water flow channel 4 without any vertical wall obstruction, giving the heat exchanger fluid a higher degree of freedom of flow.
[0026] Furthermore, the water flow channel 4 includes an inlet section 41 and a heat exchange section 42. The inlet section 41 is arranged in a straight line toward the inlet 2, and the heat exchange section 42 is connected to the end of the inlet section 41 away from the inlet 2, and the heat exchange sections 42 intersect to form a junction point.
[0027] The inlet section 41 receives the heat exchange fluid flowing out of the inlet 2 and guides it to the heat exchange section 42. The heat exchange section 42 sweeps the heat exchange fluid across a larger area of the plates, thereby promoting efficient heat exchange. The inlet section 41 is arranged in a straight line towards the inlet 2, so the heat exchange fluid flows out of the inlet 2 in a straight line without turning, which can weaken the local eddies near the inlet 2 and further reduce the inlet resistance.
[0028] Reference Figure 1 The heat exchange section 42 can be bent, and the heat exchange sections 42 of two or more water flow channels 4 intersect to form an array of intersection points.
[0029] In practical applications, the curved path of the heat exchange section 42 can be sinusoidal, cosine, "V"-shaped, or "W"-shaped. These curved paths exhibit regular peaks and troughs, allowing the heat exchange fluid to undergo regular reciprocating motion as it flows along the heat exchange section 42. The fluid constantly changes direction during its journey, creating turbulence and ensuring heat exchange efficiency. The heat exchange sections 42 of two or more water flow channels 4 intersect to form an array of intersection points, i.e., several water flow channels 4 interweave to form a network, maximizing the coverage area of the plates and allowing the water flow channels 4 to cover a wider area, thus ensuring heat exchange efficiency.
[0030] The water flow channel 4 also includes an outlet section 43, which is connected to the end of the heat exchange section 42 away from the inlet section 41 and communicates with the outlet 3. The outlet section 43 is responsible for collecting the heat-exchanged fluid and guiding it to the outlet 3, avoiding end stagnation and eddy currents. The outlet section 43 can be arranged in a straight line, so that the heat-exchanged fluid flows in a straight line towards the outlet 3 without turning, which can reduce the outlet resistance.
[0031] Reference Figure 1 The plate body 1 has a heat exchange zone 12 and a water inlet zone 11 and a water outlet zone 13 located at both ends of the heat exchange zone 12. The water inlet 2 is located in the water inlet zone 11, the water outlet 3 is located in the water outlet zone 13, the water flow channel 4 is formed in the heat exchange zone 12, the water inlet section 41 extends to the water inlet zone 11, and the water outlet section 43 extends to the water outlet zone 13.
[0032] Specifically, the bottom surfaces of both the inlet area 11 and the outlet area 13 are flat, and are lower than the plane containing the opening of the water flow channel 4. The inlet 2 is located in the inlet area 11, and the outlet 3 is located in the outlet area 13. The coverage area of the inlet 2 is smaller than that of the inlet area 11, and the coverage area of the outlet 3 is smaller than that of the outlet area 13. The heat exchange area 12 serves as the main heat exchange area of the plate body 1. The area of the heat exchange area 12 is much larger than that of the inlet area 11 and the outlet area 13, being at least five times the size of either the inlet area 11 or the outlet area 13. The water flow channel 4 is formed in the heat exchange area 12, with the inlet section 41 extending into the inlet area 11 and the outlet section 43 extending into the outlet area 13. The inlet sections 41 of multiple water flow channels 4 are arranged at intervals. After the heat exchange fluid flows out of the inlet 2, it first diffuses into the inlet area 11 to achieve pressure equalization before being diverted to different inlet sections 41. This reduces the kinetic energy difference at the inlet of different water flow channels 4, making the flow rate of each water flow channel 4 more uniform. The outlet sections 43 of multiple water flow channels 4 are arranged at intervals or all point to the outlet 3. After the heat exchange fluid flows out of the outlet section 43, it converges in the outlet area 13. The liquid level in the outlet area 13 rises and accumulates static pressure, allowing the heat exchange fluid to be discharged smoothly from the outlet 3 with higher kinetic energy.
[0033] Furthermore, the bottom surface of the water inlet zone 11 can be configured as an inclined surface, with the end of the inclined surface away from the heat exchange zone 12 being higher and the end closer to the heat exchange zone 12 being lower. The water inlet 2 is located at the end of the inclined surface away from the heat exchange zone 12. That is, the water inlet 2 is located at the higher position of the inclined surface, and the water inlet 2 of the water inlet section 41 is located at the lower position of the inclined surface. Based on this, after the heat exchange fluid flows out from the water inlet 2, it will accelerate down the inclined surface under the action of the component of gravity, converting gravitational potential energy into kinetic energy and reducing pumping power consumption.
[0034] The water inlet zone 11 may be provided with a first rib 5, which is a semi-enclosed protruding structure. The two ends of the first rib 5 are connected to or close to the boundary line between the water inlet zone 11 and the heat exchange zone 12. The first rib 5 and the boundary line between the water inlet zone 11 and the heat exchange zone 12 enclose a first slow-flow zone 6. The water inlet 2 is located in the first slow-flow zone 6, and one end of the water inlet section 41 facing the water inlet zone 11 extends into the first slow-flow zone 6. The first rib 5 can prevent the heat exchange fluid from diffusing excessively outward, causing the heat exchange fluid to concentrate and flow into each water inlet section 41 from the first slow-flow zone 6, thus avoiding overflow loss.
[0035] Similarly, the outlet zone 13 may be provided with a second rib 7, which is a semi-enclosed protruding structure. Both ends of the second rib 7 are connected to or near the boundary line between the outlet zone 13 and the heat exchange zone 12. The second rib 7, together with the boundary line between the outlet zone 13 and the heat exchange zone 12, forms a second slow-flow zone 8. The outlet 3 is located in the second slow-flow zone 8, and one end of the outlet section 43 facing the outlet zone 13 extends into the second slow-flow zone 8. The second rib 7 can prevent excessive outward diffusion of the heat exchange fluid, causing the heat exchange fluid to collect in the second slow-flow zone 8 and avoiding overflow loss.
[0036] The inlet section 41, the heat exchange section 42, and the outlet section 43 are arranged sequentially along the length of the plate body 1. It is easy to understand that if the inlet section 41 and the outlet section 43 are too long, they will occupy a large area of the heat exchange zone 12, resulting in the compression of the heat exchange section 42 and a decrease in the utilization rate of the heat transfer area. Let L1 be the projected length of the inlet section 41 along the length of the plate body 1, L2 be the projected length of the heat exchange section 42 along the length of the plate body 1, and L3 be the projected length of the outlet section 43 along the length of the plate body 1, where L1 / L2 ≤ 1 / 20 and L3 / L2 ≤ 1 / 20. This ratio range ensures that the coverage area of the heat exchange section 42 occupies at least 90% of the area of the heat exchange zone 12, guaranteeing that the main heat transfer area is not compressed and maintaining efficient heat exchange.
[0037] The cross-sectional area of the inlet section 41 can be larger than that of the heat exchange section 42. It is easy to understand that the larger the cross-sectional area, the smaller the flow resistance, and the smaller the cross-sectional area, the greater the flow resistance. In this embodiment, the cross-sectional area of the inlet section 41 is designed to be larger, which can further reduce the inlet resistance.
[0038] In practical applications, the flow cross-section of the inlet section 41 can be a gradually narrowing cross-section, that is, the flow cross-section of the inlet section 41 gradually narrows from the end near the inlet 2 to the end away from the inlet 2. The gradually narrowing cross-section makes the inlet section 41 form a gradually narrowing flow channel along the way, and the fluid continues to accelerate and the pressure gradient is uniform during the gentle contraction process, avoiding local eddies caused by sudden contraction of the cross-section, thereby further reducing the inlet pressure drop.
[0039] Similarly, the cross-sectional area of the outlet section 43 can also be larger than that of the heat exchange section 42, resulting in a lower outlet pressure of the heat exchange fluid. The cross-sectional area of the outlet section 43 can be a gradually expanding cross-section, meaning that the cross-sectional area of the outlet section 43 gradually expands from the end closest to the heat exchange section 42 to the end furthest from the heat exchange section 42. This gradually expanding cross-section creates a gradually expanding flow channel along the outlet section 43, allowing the fluid to gradually decelerate during the gentle expansion process, converting dynamic pressure into static pressure, and enabling the heat exchange fluid to flow out in a turbulent state.
[0040] This utility model also proposes a plate heat exchanger, which includes a heat exchanger body composed of a plurality of heat exchanger plates stacked sequentially as described above. Specifically, the heat exchanger body includes a plurality of alternately stacked odd-numbered layers and even-numbered layers of heat exchanger plates. The specific structure of the odd-numbered and even-numbered layers of heat exchanger plates refers to the heat exchanger plates provided in the above embodiments. Since this plate heat exchanger adopts all the technical solutions of the above embodiments, it has all the beneficial effects of the above embodiments, and will not be repeated here.
[0041] In this design, the inlet and outlet directions of the odd-numbered heat exchanger plates can be opposite to those of the even-numbered heat exchanger plates; that is, when the odd-numbered heat exchanger plates have a left-in, right-out inlet, the even-numbered heat exchanger plates have a right-in, left-out inlet. The water flow channels in the odd-numbered heat exchanger plates are used to introduce the first heat exchange fluid, while the water flow channels in the even-numbered heat exchanger plates are used to introduce the second heat exchange fluid. Both the first and second heat exchange fluids can be liquids or gases. One of the first and second heat exchange fluids can be a relatively high-temperature fluid, and the other a relatively low-temperature fluid. The first and second heat exchange fluids, with a temperature difference, flow towards each other on opposite sides of the plates to exchange heat.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A heat exchanger plate, characterized in that, The device includes a plate body, with an inlet and an outlet at opposite ends of the plate body. The surface of the plate body is recessed with grooves to form a water flow channel connecting the inlet and the outlet. There are at least two water flow channels, and the at least two water flow channels intersect to form a confluence point.
2. The heat exchanger plates as described in claim 1, characterized in that, The water flow channel includes an inlet section and a heat exchange section. The inlet section is arranged in a straight line towards the inlet, and the heat exchange section is connected to the end of the inlet section away from the inlet. The heat exchange sections intersect to form a junction point.
3. The heat exchanger plates as described in claim 2, characterized in that, The heat exchange section is curved, and the heat exchange sections of at least two water flow channels intersect to form an array of intersection points.
4. The heat exchanger plates as described in claim 2, characterized in that, The water flow channel further includes a water outlet section, which is connected to the end of the heat exchange section away from the water inlet section and communicates with the water outlet. The plate body has a heat exchange zone and an inlet zone and an outlet zone located at both ends of the heat exchange zone. The inlet is located in the inlet zone, the outlet is located in the outlet zone, the water flow channel is formed in the heat exchange zone, the inlet section extends to the inlet zone, and the outlet section extends to the outlet zone.
5. The heat exchanger plate as described in claim 4, characterized in that, The water outlet section is set in a straight line.
6. The heat exchanger plate as described in claim 4, characterized in that, The bottom surface of the water inlet area is an inclined surface, with the end of the inclined surface away from the heat exchange area being higher and the end closer to the heat exchange area being lower. The water inlet is located at the end of the inclined surface away from the heat exchange area.
7. The heat exchanger plate as described in claim 4, characterized in that, The inlet section, the heat exchange section, and the outlet section are arranged sequentially along the length of the plate body. The projected length of the inlet section along the length of the plate body is L1, the projected length of the heat exchange section along the length of the plate body is L2, and the projected length of the outlet section along the length of the plate body is L3. L1 / L2≤1 / 20, L3 / L2≤1 / 20.
8. The heat exchanger plate as described in claim 2, characterized in that, The cross-sectional area of the inlet section is larger than that of the heat exchange section.
9. The heat exchanger plate as described in claim 8, characterized in that, The cross-sectional area of the inlet section gradually narrows from the end closest to the inlet to the end furthest from the inlet.
10. A plate heat exchanger, characterized in that, The heat exchanger body comprises a plurality of heat exchanger plates as described in any one of claims 1 to 9 stacked in sequence.