Plate sheet and heat exchanger
By conducting non -symptoms on the traditional point waveform plate, the fluid flow caused by symmetrical layout is too regular problem, and the higher thermal exchange performance and smoother medium circulation are achieved.
Patent Information
- Application Number
- CN202420897554.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The symmetrical arrangement of traditional point corrugated plates leads to relatively regular fluid flow and lack of turbulence, which in turn limits the heat exchange performance of the heat exchanger.
A non -symmetrical dot -shaped plate is designed. By setting a cross and slope -shaped connection parts at different axes of the heat exchange unit to form the top of the dull -angle triangle distribution, it enhances the turbulence of the fluid.
Through asymmetric design, the fluid of the fluid is strengthened, and the heat exchange performance is improved. The simulation results show that the heat exchange performance increases by 20%, and at the same time reduce the medium flow resistance.
Smart Images
Figure CN222418724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat exchangers, in particular to a plate and a heat exchanger. Background Art
[0002] There are two main types of corrugation forms in the plate heat exchanger products that are maturely used in the market. One is the herringbone corrugation form: it has the longest development time, the most mature technology, and the largest number of patents; the second is the point corrugation form, which has a short development time, unclear technical principles, and there are still many technical breakthroughs.
[0003] The surface of the conventional dot-corrugated plate is provided with a plurality of concave portions 1 and convex portions 2, and the concave portions and convex portions are distributed in a periodic array. Figure 1 This is an enlarged view of one of the heat exchange units on the surface of a traditional corrugated plate (the convex part 2 only shows half of it). Figure 1 There are four symmetry axes, a, b, c, and d, and the heat exchange units are symmetrically distributed along the four symmetry axes. This regular arrangement results in a uniform distribution of the flow channels and a relatively regular flow of the fluid. From the perspective of enhanced heat transfer, the symmetrically arranged structure is not conducive to generating turbulence and enhancing the overall heat transfer performance. Utility Model Content
[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a plate and a heat exchanger to further improve the heat exchange performance of the heat exchanger. The present invention at least solves some of the problems in the prior art.
[0005] The utility model is achieved in this way:
[0006] The utility model provides a plate, comprising a plurality of heat exchange units, wherein the heat exchange units are provided with a plurality of raised tops and a plurality of recessed bottoms, the tops and the bottoms are both welding portions for welding with adjacent plates, the tops and the bottoms are connected via side surfaces, a portion of the bottoms on the heat exchange units is located on a first axis, another portion of the bottoms on the heat exchange units is located on a second axis, the first axis and the second axis are in a cross relationship, both the first axis and the second axis pass through the bottom located at the center of the heat exchange unit, two adjacent bottoms located on the first axis are connected via a first sloped connection portion, two adjacent bottoms located on the second axis are connected via a second sloped connection portion, and the height of the first sloped connection portion is greater than the height of the second sloped connection portion.
[0007] Furthermore, the first sloped connection portion is 0.1 to 0.5 mm higher than the second sloped connection portion.
[0008] Furthermore, the side surface is a smooth curved surface.
[0009] Furthermore, the top is in the shape of an elongated strip.
[0010] Furthermore, the bottom is in a water drop shape.
[0011] Furthermore, the heat exchange unit has three tops, and the three tops are distributed in an obtuse triangle.
[0012] Furthermore, the obtuse angle of the obtuse triangle is 90° to 150°.
[0013] Furthermore, the bottom of the center of the heat exchange unit is located between the three tops.
[0014] Furthermore, the heat exchange units are arranged in an array in the length direction and width direction of the plate.
[0015] The utility model also provides a heat exchanger, comprising a heat exchange core, wherein the heat exchange core comprises a plurality of the above-mentioned plates, and each of the plates is welded in sequence along a set direction.
[0016] The utility model has the following beneficial effects:
[0017] 1. The utility model provides a new type of point wave plate, which is asymmetrically designed on the cross sections corresponding to the four axes a, b, c, and d, thereby enhancing the turbulence of the fluid in the heat exchange unit and improving the overall heat exchange performance.
[0018] 2. In the utility model, the convex top and the concave bottom on the plate are connected by a smooth curved surface, so that the medium flows more smoothly, the flow resistance of the medium is reduced, and thus the pressure loss of the medium fluid is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 This is a partial enlarged picture of the traditional point-wave plate;
[0021] Figure 2 A schematic diagram of a plate provided in an embodiment of the utility model;
[0022] Figure 3 Schematic diagram of the diversion area provided by the embodiment of the utility model ( Figure 2 lower right corner);
[0023] Figure 4 The embodiment of the utility model provides Figure 3 A magnified image of
[0024] Figure 5 A schematic diagram of a heat exchange unit provided in an embodiment of the utility model;
[0025] Figure 6 A top view of a heat exchange unit provided in an embodiment of the utility model;
[0026] Figure 7 A schematic diagram of the four symmetry axes a, b, c, and d of the heat exchange unit provided in an embodiment of the utility model;
[0027] Figure 8 A schematic cross-sectional view of a along the symmetry axis a provided in an embodiment of the utility model;
[0028] Fig. 9 A schematic diagram of a cross section along the symmetry axis b provided by an embodiment of the utility model;
[0029] Fig.10 A schematic diagram of a cross section along the symmetry axis c provided by an embodiment of the utility model;
[0030] Fig.11 This is a schematic cross-sectional view along the symmetry axis d provided in an embodiment of the present utility model.
[0031] In the figure: recess 1, protrusion 2, plate 3, inlet and outlet area 4, guide area 5, main heat exchange area 6, angle 7 between distribution hole and short side of plate, angle 8 between rib and short side of plate, heat exchange unit 9, top 10, bottom 11, side 12, first sloped connection part 13, second sloped connection part 14, section a 15, section b 16, section c 17, section d 18. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0034] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "several" means two or more.
[0035] like Figure 2-Figure 11 The utility model provides a plate, including a plurality of heat exchange units, each of which is arranged in an array in the length direction and the width direction of the plate, and the heat exchange unit is provided with a plurality of raised tops 10 and a plurality of recessed bottoms 11, the top 10 is the highest point of the heat exchange unit, and the bottom 11 is the lowest point of the heat exchange unit, and the top 10 and the bottom 11 are both welding parts for welding with adjacent plates, the top 10 is in the shape of a long strip, and the bottom 11 is in the shape of a teardrop, and the top 10 and the bottom 11 are connected by a side 12, and a part of the bottom 11 on the heat exchange unit is located on the first axis (b axis), and another part of the heat exchange unit The bottom 11 is located on the second axis (d axis), and the first axis and the second axis of the heat exchange unit both pass through the three bottoms 11. The first axis and the second axis are in a cross relationship. The first axis and the second axis both pass through the bottom 11 located at the center of the heat exchange unit. The two adjacent bottoms 11 located on the first axis are connected by a first sloped connection portion 13, and the two adjacent bottoms 11 located on the second axis are connected by a second sloped connection portion 14. The height of the first sloped connection portion 13 is greater than the height of the second sloped connection portion 14. In this embodiment, the first sloped connection portion 13 is 0.1 to 0.5 mm higher than the second sloped connection portion 14.
[0036] In this embodiment, the heat exchange unit has three tops 10 (two of which are not fully shown on one heat exchange unit and can form a long strip of complete top with the corresponding tops on the adjacent heat exchange unit, such as Figure 4 ),like Figure 6 The three tops 10 are distributed in an obtuse triangle, and the obtuse angle of the obtuse triangle is 90-150 degrees. The bottom 11 at the center of the heat exchange unit is located between the three tops 10.
[0037] The plate 3 is provided with an inlet and outlet area 4 for cold fluid and hot fluid, a flow guide area 5, and a main heat exchange area 6 (see Figure 2), the four end corners of the plate 3 are the inlet and outlet areas 4, and the four end corners correspond to the cold fluid inlet and outlet and the hot fluid inlet and outlet respectively. The cold fluid inlet and outlet can be arranged diagonally or close to the same long side of the plate, and the hot fluid inlet and outlet are the same. When the plate 3 is used as an evaporator, the medium of the cold fluid is the refrigerant. At this time, a distribution hole is set at the refrigerant inlet (the refrigerant enters the refrigerant channel through the distribution hole). The diameter of the distribution hole is 0.8~1.2mm, and the angle between the distribution hole and the short side of the plate is 0~90°. Figure 2 Preferably, in this embodiment, the angle 7 between the distribution hole and the short side of the plate is 45°.
[0038] The guide area 5 of the plate 3 is provided with a plurality of ribs, each of which is arranged around the inlet and outlet area 4, and the inlet and outlet area 4 is connected with the main heat exchange area 6 through the plurality of ribs. The functions of the ribs are: first, to guide the fluid so that the fluid is more evenly distributed inside the plate; second, to increase the welding surface, strengthen the welding strength of the inlet and outlet area, and improve the overall reliability of the plate exchange. The angle 8 between the ribs and the short side of the plate is 0-90° (such as Figure 3 ).
[0039] The middle area of the plate 3 is the main heat exchange area 6, and the main heat exchange area 6 of the plate 3 is formed by a plurality of small heat exchange units 9 arranged in a periodic array along the length and width directions of the plate. The overall structure of the heat exchange unit 9 is as follows: Figure 5 As shown, the heat exchange unit 9 includes a side surface 12 , a convex top 10 , and a concave bottom 11 . Figure 6 is a top view of the heat exchange unit 9, α1 is the angle between three tops 10 in a heat exchange unit, α2 is the angle between a bottom 11 and two adjacent tops 10 in a heat exchange unit, Figure 6 The range of α1 is 90° to 150°, and the range of α2 is 120° to 180°. Preferably, in this embodiment, Figure 6 The range of α1 is 105°, and the range of α2 is 150°.
[0040] In the present invention, the top 10 and the bottom 11 are connected by the side 12, and the side 12 is a curved surface, and the side 12 is smooth without dead angles, thereby reducing the pressure loss of the medium fluid. In this embodiment, preferably, the curvature of the side 12 can conform to the trigonometric function curve, so that the flow is smoother and the flow resistance is reduced. In this embodiment, the medium flow resistance is reduced by 10%.
[0041] The four main symmetry axes (a, b, c, d) of the heat exchange unit are as follows: Figure 7 As shown. Make four cross sections perpendicular to the xy plane through the four symmetry axes a, b, c, and d. The four cross sections are as follows Figure 8-11 As shown. Figure 8-Figure 11It can be seen that, except for the left-right symmetrical distribution of section a, the left-right symmetrical distribution of sections b, c and d is asymmetrical. In sections b and d, the heights of the left and right sides are the same (H1=H2, H3=H4), but the heights of H1 and H3 (or H2 and H4) are different, and the difference between H1 and H3 (or H2 and H4) ranges from 0.1 to 0.5 mm. Preferably, in this embodiment, the difference between H1 and H3 (or H2 and H4) ranges from 0.3 mm.
[0042] In the present invention, the asymmetric structural design of the heat exchange unit strengthens the fluid turbulence and enhances the heat exchange performance. The simulation results show that the heat exchange performance of the plate provided by the present invention is 20% higher than that of the traditional point-corrugated plate.
[0043] The second embodiment of the present invention provides a heat exchanger, including a heat exchange core, wherein the heat exchange core includes a plurality of the above-mentioned plates, and each of the plates is welded in sequence along a set direction.
[0044] When the plates provided in this embodiment are used to assemble a heat exchange core, multiple plates are stacked and arranged along a set direction (the height direction of the heat exchange core), and the multiple plates are welded in sequence to form a layer of medium channel between two adjacent plates; in this embodiment, the plates 3 are stacked and welded in sequence, one positive and one negative, that is, the top 10 of a certain plate is placed upward, and the top 10 of the adjacent plate above it is placed downward, and the tops of the two plates are welded to form a first medium channel layer; if the bottom 11 of a certain plate is placed upward, the bottom 11 of the adjacent plate above it is placed downward, and the bottoms of the two plates are welded to form a second medium channel layer.
[0045] In the utility model, when the medium fluid flows from the channel inlet to the channel outlet, the gaps between the two plates are different in the b-axis and d-axis directions, forming an asymmetric structure in the medium channel, strengthening the fluid turbulence and enhancing the heat exchange performance. In addition, in this embodiment, the asymmetric distribution of the c section is also conducive to enhancing the fluid turbulence and improving the heat exchange effect.
[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A plate, characterized in that: It comprises a plurality of heat exchange units, wherein the heat exchange units are provided with a plurality of raised tops and a plurality of recessed bottoms, the tops and the bottoms are welding portions for welding with adjacent plates, the tops and the bottoms are connected via side surfaces, a portion of the bottoms on the heat exchange units is located on a first axis, another portion of the bottoms on the heat exchange units is located on a second axis, the first axis and the second axis are in a cross relationship, both the first axis and the second axis pass through the bottom located at the center of the heat exchange unit, two adjacent bottoms on the first axis are connected via a first sloped connection portion, two adjacent bottoms on the second axis are connected via a second sloped connection portion, and the height of the first sloped connection portion is greater than the height of the second sloped connection portion.
2. The plate according to claim 1, characterized in that: The first sloped connection portion is 0.1 to 0.5 mm higher than the second sloped connection portion.
3. The plate according to claim 1, characterized in that: The side surface is a smooth curved surface.
4. The plate according to claim 1, characterized in that: The top is in the shape of an elongated strip.
5. The plate according to claim 1, characterized in that: The bottom is in a water drop shape.
6. The plate according to claim 1, characterized in that: The heat exchange unit has three tops, which are distributed in an obtuse triangle.
7. The plate according to claim 6, characterized in that: The obtuse angle of an obtuse triangle is 90° to 150°.
8. The plate according to claim 6, characterized in that: The bottom of the center of the heat exchange unit is located between the three tops.
9. The plate according to claim 1, characterized in that: The heat exchange units are arranged in an array in the length direction and width direction of the plate.
10. A heat exchanger, characterized in that: It comprises a heat exchange core, which comprises a plurality of plates as described in any one of claims 1 to 9, and each of the plates is welded in sequence along a set direction.