A kind of high-efficiency asymmetric brazing plate heat exchanger suitable for
By designing a novel plate structure to form stable large and small flow channels, the problem of poor pressure resistance of brazed plate heat exchangers under high temperature and high pressure differential environments was solved, and the stability and fluid heat transfer effect in high-efficiency asymmetric brazed plate heat exchangers were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU BAODE HEAT-EXCHANGER EQUIPMENT CO LTD
- Filing Date
- 2023-01-13
- Publication Date
- 2026-06-16
AI Technical Summary
Existing brazed plate heat exchangers have poor pressure resistance under high temperature and high pressure differential environments, and cannot fully utilize their high performance characteristics. This is especially true in the refrigeration industry where the refrigerant side pressure drop is large and the water side pressure drop is small, which affects stability.
The design incorporates novel first and second plates. The first plate features a corrugated section with a half-high groove in the shape of a fishbone, while the second plate features low corrugations. Stable large and small flow channels are formed through welding points and bonding, thereby increasing the density and strength of the welding points and creating turbulent points to enhance the fluid heat exchange effect.
It improves the pressure resistance and pressure resistance of the heat exchanger, ensures stability under high temperature difference/high pressure difference environment, and enhances the fluid heat exchange effect. It is suitable for high-efficiency asymmetric brazed plate heat exchangers.
Smart Images
Figure CN116294713B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of heat exchanger technology, and in particular relates to a high-efficiency asymmetric brazed plate heat exchanger. Background Technology
[0002] In the brazed plate heat exchanger industry, there are often situations where the flow rate of fluid on one side is large and the flow rate of fluid on the other side is small. Or, when used in the refrigeration industry, the required pressure drop on the refrigerant side is large and the required pressure drop on the water side is small, forming a high temperature difference and a pressure difference, which affects the stability of the heat exchanger.
[0003] The current solution is to use an asymmetrical design, with a small flow channel on one side and a large flow channel on the other. The large flow channel side is often achieved by increasing the distance between the weld points and using high and low corrugations. The obvious drawbacks are that the pressure resistance of the heat exchanger is greatly reduced, and the turbulence on the large channel side is reduced by using the high and low corrugation design, which cannot fully utilize the high performance characteristics of plate heat exchangers. Summary of the Invention
[0004] The purpose of this invention is to provide a high-efficiency asymmetric brazed plate heat exchanger. By designing a novel first plate and second plate as heat exchange plates, the upper half-height groove of the first plate facilitates positioning and fixing with the second plate, ensuring a dense weld point distance, high strength, and improved pressure resistance of the heat exchanger. At the same time, it can form stable large and small flow channels, making it suitable for use in high temperature difference / high pressure difference environments, ensuring the stability of the heat exchanger during use.
[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:
[0006] This invention relates to a high-efficiency asymmetric brazed plate heat exchanger, comprising a front end plate, a rear end plate, a plurality of first plates and a plurality of second plates, wherein a first corrugated part is formed on the first plates and a second corrugated part is formed on the second plates.
[0007] The first corrugated forming part has several half-height grooves on its high corrugations. The first corrugated forming part is in the shape of a regular herringbone, and the several half-height grooves form a half-height forming part in the shape of an inverted herringbone.
[0008] When the second plate is superimposed on the front side of the first plate, the low corrugation of the second corrugated forming part on the second plate is fitted into the half-height forming part and forms a solder joint, and a small flow channel is formed between the first corrugated forming part and the second corrugated forming part.
[0009] When the first plate is superimposed on the front side of the second plate, the high corrugations of the second corrugated part and the low corrugations of the first corrugated part are attached to form a weld point, and a large flow channel is formed between the first corrugated part and the second corrugated part, and a half-high groove in the large flow channel forms a turbulent point.
[0010] Furthermore, a plurality of first plates and a plurality of second plates are disposed between the front end plate and the rear end plate, with the plurality of first plates and the plurality of second plates being spaced apart.
[0011] Furthermore, the first plate, the second plate, the front plate, and the rear plate are all provided with peripheral edges, and the peripheral edges of the front plate, the plurality of first plates, the plurality of second plates, and the rear plate are sequentially nested.
[0012] Furthermore, each of the four corners of the front side of the front plate is provided with an end tube, and each of the four corners of the first plate and the second plate is provided with a corner hole concentric with the end tube.
[0013] Furthermore, a first protrusion is provided on the outer side of the corner hole at the upper and lower part of one side of the first plate, and the first protrusion is flush with the half-height groove.
[0014] Furthermore, a second protrusion is provided on the outer side of the corner hole at the upper and lower part of one side of the second plate. The second protrusion is flush with the high corrugation of the second corrugated part. The first and second protrusions are located on both sides of the heat exchanger, respectively.
[0015] Furthermore, the first plate has a first outward protruding edge on the outer side of the corner hole away from the first outward protrusion, and the second plate has a first inward concave edge on the outer side of the corner hole near the second outward protrusion. The first outward protruding edge and the first inward concave edge are attached to each other to form a solder joint.
[0016] Furthermore, a second outward protruding edge is provided on the outer side of the corner hole away from the second outward protrusion on the second plate, and a second inward concave edge is provided on the outer side of the corner hole near the first outward protrusion on the first plate. The second outward protruding edge and the second inward concave edge are attached to each other and form a solder joint.
[0017] Furthermore, the upper and lower parts of one side of the rear end plate are provided with plugs, and the plugs are clearance-fitted with the corner holes.
[0018] Furthermore, the depth of the first corrugated forming part is set to 2mm, and the depth of the half-height groove is set to 1mm.
[0019] The present invention has the following beneficial effects:
[0020] 1. This invention designs a novel first plate and second plate as heat exchange plates for a heat exchanger. The upper half-height groove of the first plate facilitates positioning and fixing with the second plate, ensuring a dense weld point distance, high strength, and improved pressure resistance of the heat exchanger. At the same time, it can form stable large and small flow channels, making it suitable for use in high temperature / high pressure differential environments, ensuring the stability of the heat exchanger during use.
[0021] 2. The portion of the half-height groove on the first plate of the present invention located within the large flow channel can form a turbulent flow point, further improving the heat exchange effect of the fluid within the large flow channel and enhancing the performance of the heat exchanger.
[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is an exploded view of the structure of a high-efficiency asymmetric brazed plate heat exchanger according to the present invention.
[0025] Figure 2 This is a schematic diagram of the structure of the first plate;
[0026] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0027] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;
[0028] Figure 5 This is a schematic diagram of the second plate.
[0029] Figure 6 for Figure 5 A magnified view of a section at point C;
[0030] Figure 7 Schematic diagrams of small and large flow channels;
[0031] The attached diagram lists the components represented by each number as follows:
[0032] 1-Front end plate, 2-Rear end plate, 3-First plate, 4-Second plate, 5-Small flow channel, 6-Large flow channel, 7-Outer periphery, 101-End tube, 201-Plug, 301-First corrugated part, 302-Half-height groove, 303-Corner hole, 304-First outward protrusion, 305-First outward protruding edge, 306-Second inward concave edge, 401-Second corrugated part, 402-Second outward protrusion, 403-First inward concave edge, 404-Second outward protruding edge. Detailed Implementation
[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0034] Please see Figure 1-7 As shown, the present invention is a high-efficiency asymmetric brazed plate heat exchanger, including a front end plate 1, a rear end plate 2, a plurality of first plates 3 and a plurality of second plates 4, wherein a first corrugated forming part 301 is formed on the first plates 3 and a second corrugated forming part 401 is formed on the second plates 4.
[0035] The first corrugated forming part 301 has several half-height grooves 302 on its high corrugations. The first corrugated forming part 301 is in the shape of a regular herringbone, and the several half-height grooves 302 form an inverted herringbone-shaped half-height forming part.
[0036] When the second plate 4 is superimposed on the front side of the first plate 3, the low corrugation of the second corrugated forming part 401 on the second plate 4 is fitted into the half-height forming part and forms a solder joint, and a small flow channel 5 is formed between the first corrugated forming part 301 and the second corrugated forming part 401.
[0037] When the first plate 3 is superimposed on the front side of the second plate 4, the high corrugations of the second corrugated forming part 401 and the low corrugations of the first corrugated forming part 301 are attached to form a weld point, and a large flow channel 6 is formed between the first corrugated forming part 301 and the second corrugated forming part 401. The half-height groove 302 in the large flow channel 6 forms a turbulence point.
[0038] Among them, such as Figure 1 As shown, a number of first plates 3 and a number of second plates 4 are disposed between the front end plate 1 and the rear end plate 2, with the number of first plates 3 and the number of second plates 4 distributed at intervals.
[0039] Among them, such as Figure 1-6As shown, the edges of the first plate 3, the second plate 4, the front plate 1 and the rear plate 2 are all provided with an outer perimeter 7, and the outer perimeter 7 on the front plate 1, several first plates 3, several second plates 4 and the rear plate 2 are sequentially nested.
[0040] Among them, such as Figure 1 As shown, end tubes 101 are provided at the four corners of the front side of the front plate 1, and corner holes 303 concentric with end tubes 101 are provided at the four corners of the first plate 3 and the second plate 4. The four end tubes are used for the inflow and outflow of the two fluids.
[0041] Among them, such as Figure 2 and Figure 4 As shown, a first protrusion 304 is provided on the outer side of the corner hole 303 on the upper and lower parts of one side of the first plate 3, and the first protrusion 304 is flush with the half-height groove 302.
[0042] Among them, such as Figure 2 and Figure 4-6 As shown, a second protrusion 402 is provided on the outer side of the corner hole 303 on the upper and lower parts of one side of the second plate 4. The second protrusion 402 is flush with the high corrugation of the second corrugated forming part 401. The first protrusion 304 and the second protrusion 402 are located on both sides of the heat exchanger, and the first protrusion 304 and the second protrusion 402 form the gap between the water inlet and the water outlet.
[0043] Among them, such as Figure 2 and Figure 4-6 As shown, a first external protruding edge 305 is provided on the outer side of the corner hole 303 away from the first external protrusion 304 on the first plate 3, and a first internal concave edge 403 is provided on the outer side of the corner hole 303 near the second external protrusion 402 on the second plate 4. The first external protruding edge 305 and the first internal concave edge 403 are attached to form a weld point, which plays a role in external sealing and reinforcement.
[0044] Among them, such as Figure 2 and Figure 4-6 As shown, a second outer protruding edge 404 is provided on the outer side of the corner hole 303 away from the second outer protrusion 402 on the second plate 4, and a second inner concave edge 306 is provided on the outer side of the corner hole 303 near the first outer protrusion 304 on the first plate 3. The second outer protruding edge 404 and the second inner concave edge 306 are attached to form a weld point, which plays a role in external sealing and reinforcement.
[0045] Among them, such as Figure 1 As shown, a plug 201 is provided on the upper and lower parts of one side of the rear plate 2. The plug 201 is fitted with the corner hole 303 with a clearance. When the heat exchange plate near the rear plate 2 is the first plate 3, the plug 201 blocks the corner hole 303 of the first protrusion 304 on the first plate 3. When the heat exchange plate near the rear plate 2 is the second plate 4, the plug 201 blocks the corner hole 303 of the second protrusion 402 on the second plate 4.
[0046] The depth of the first corrugated forming part 301 is set to 2mm, and the depth of the half-height groove 302 is set to 1mm. This specification is the optimal specification.
[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims
1. A high-efficiency asymmetric brazed plate heat exchanger, comprising a front end plate (1), a rear end plate (2), a plurality of first plates (3) and a plurality of second plates (4), wherein the first plates (3) are formed with a first corrugated portion (301) and the second plates (4) are formed with a second corrugated portion (401), characterized in that: The first corrugated forming part (301) has a plurality of half-height grooves (302) on its high corrugations. The first corrugated forming part (301) is in the shape of a regular herringbone, and the plurality of half-height grooves (302) form a half-height forming part in the shape of an inverted herringbone. When the second plate (4) is superimposed on the front side of the first plate (3), the low corrugation of the second corrugated forming part (401) on the second plate (4) is fitted into the half-height forming part and forms a solder joint, and a small flow channel (5) is formed between the first corrugated forming part (301) and the second corrugated forming part (401). When the first plate (3) is superimposed on the front side of the second plate (4), the high corrugation of the second corrugated forming part (401) and the low corrugation of the first corrugated forming part (301) are attached to form a weld point, and a large flow channel (6) is formed between the first corrugated forming part (301) and the second corrugated forming part (401), and a half-high groove (302) in the large flow channel (6) forms a turbulence point; The first plate (3), the second plate (4), the front plate (1) and the rear plate (2) are all provided with an outer edge (7), and the outer edges (7) on the front plate (1), the first plate (3), the second plate (4) and the rear plate (2) are sequentially fitted together; The first plate (3) has a first protrusion (304) on the outside of the corner hole (303) on the upper and lower parts of one side, and the first protrusion (304) is flush with the half-height groove (302); The second plate (4) has a second protrusion (402) on the outside of the corner hole (303) on the upper and lower parts of one side. The second protrusion (402) is flush with the high corrugation of the second corrugated part (401). The first protrusion (304) and the second protrusion (402) are located on both sides of the heat exchanger. The first plate (3) has a first outward protrusion edge (305) on the outside of the corner hole (303) away from the first outward protrusion (304), and the second plate (4) has a first inward concave edge (403) on the outside of the corner hole (303) near the second outward protrusion (402). The first outward protrusion edge (305) and the first inward concave edge (403) are attached to form a solder joint; The second plate (4) has a second outer protrusion edge (404) on the outside of the corner hole (303) away from the second outer protrusion (402), and the first plate (3) has a second inner concave edge (306) on the outside of the corner hole (303) near the first outer protrusion (304). The second outer protrusion edge (404) and the second inner concave edge (306) are attached to each other and form a solder joint.
2. The heat exchanger suitable for high-efficiency asymmetric brazed plate heat exchangers according to claim 1, characterized in that, A plurality of first plates (3) and a plurality of second plates (4) are disposed between the front end plate (1) and the rear end plate (2), and the plurality of first plates (3) and a plurality of second plates (4) are distributed at intervals.
3. A heat exchanger suitable for high-efficiency asymmetric brazed plate heat exchangers according to claim 1, characterized in that, The front end plate (1) has end tubes (101) at the four corners of its front side, and the first plate (3) and the second plate (4) have corner holes (303) concentric with the end tubes (101) at the four corners of their respective sides.
4. A heat exchanger suitable for high-efficiency asymmetric brazed plate heat exchangers according to claim 3, characterized in that, The rear end plate (2) is provided with plugs (201) on both the upper and lower parts of one side, and the plugs (201) are clearance-fitted with the corner holes (303).
5. A heat exchanger suitable for high-efficiency asymmetric brazed plate heat exchangers according to claim 1, characterized in that, The depth of the first corrugated forming part (301) is set to 2 mm, and the depth of the half-height groove (302) is set to 1 mm.