CN117288008A - A kind of heat exchange micro-element, heat exchange plate and plate heat exchanger - Google Patents
A kind of heat exchange micro-element, heat exchange plate and plate heat exchanger Download PDFInfo
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- CN117288008A CN117288008A CN202311201960.XA CN202311201960A CN117288008A CN 117288008 A CN117288008 A CN 117288008A CN 202311201960 A CN202311201960 A CN 202311201960A CN 117288008 A CN117288008 A CN 117288008A
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- heat exchange
- curved surface
- plate
- surface section
- plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明提供一种换热微元、换热板及板式换热器，换热微元包括一个凸出部和围设在凸出部周围的多个子凹陷部；凸出部与各个子凹陷部通过曲面连接，曲面为多段结构且包括依次设置的第一曲面段和第二曲面段；第一曲面段的曲率方向和第二曲面段的曲率方向不同；优化了曲面结构，结构紧凑，使凸出部与各个子凹陷部光滑过渡；换热板包括主体板，主体板形成有主换热区，主换热区由多个换热微元构成；相邻的多个换热微元拼接在一起，使多个子凹陷部构成凹陷部；保证换热板各处的厚度均匀，降低了开裂风险，简化了换热板的加工过程，提高了换热板的加工质量，解决换热板加工难度大、厚度不均、开裂风险大和可靠性低的问题。
The invention provides a heat exchange microelement, a heat exchange plate and a plate heat exchanger. The heat exchange microelement includes a protruding part and a plurality of sub-recessed parts surrounding the protruding part; the protruding part and each sub-recessed part Through the curved surface connection, the curved surface is a multi-segment structure and includes a first curved surface segment and a second curved surface segment arranged in sequence; the curvature direction of the first curved surface segment and the curvature direction of the second curved surface segment are different; the curved surface structure is optimized and the structure is compact, making the convex The outlet part and each sub-recessed part have a smooth transition; the heat exchange plate includes a main plate, which forms a main heat exchange area, and the main heat exchange area is composed of multiple heat exchange micro-units; multiple adjacent heat exchange micro-units are spliced in At the same time, multiple sub-recessed parts are formed into a recessed part; the thickness of the heat exchange plate is ensured to be uniform throughout, reducing the risk of cracking, simplifying the processing process of the heat exchange plate, improving the processing quality of the heat exchange plate, and solving the difficulty of processing the heat exchange plate. Large, uneven thickness, high risk of cracking and low reliability.
Description
Technical Field
The invention belongs to the technical field of heat exchange, and particularly relates to a heat exchange micro-element, a heat exchange plate and a plate heat exchanger.
Background
The heat exchange plate is a core part of the plate heat exchanger, and the structure of the heat exchange plate has obvious influence on the overall performance. In the prior art, a plurality of raised points and a plurality of recessed points are formed in a heat exchange area of a heat exchange plate, adjacent raised points are in transition through a concave curved surface, adjacent recessed points are in transition through a convex curved surface, and two adjacent heat exchange plates are stacked to realize contact between the recessed points and the raised points; but the convex point and the concave point are both planes, the curvature change at the transition part of the planes and the curved surface is large, the structures of the concave curved surface and the convex curved surface are complex, the uneven thickness and the cracking risk of the heat exchange plate are increased, and the performance of the heat exchange plate is further influenced.
Disclosure of Invention
In view of the above, the invention provides a heat exchange micro-element, a heat exchange plate and a plate heat exchanger, which are used for solving the problems of uneven thickness, high cracking risk, low reliability and the like of the heat exchange plate caused by complex transition curved surface structure of the heat exchange micro-element in the prior art.
The invention provides a heat exchange infinitesimal for a heat exchange plate; the heat exchange micro element comprises a protruding part and a plurality of sub-recessed parts surrounding the protruding part; the convex parts are connected with the sub-concave parts through curved surfaces, and the curved surfaces are of multi-section structures and comprise a first curved surface section and a second curved surface section;
the first curved surface section is connected with the convex part, the second curved surface section is connected with the sub-concave part, and the curvature direction of the first curved surface section is different from the curvature direction of the second curved surface section.
Further optionally, the curved surface further comprises a transition surface segment, the transition surface segment being located between the first curved surface segment and the second curved surface segment.
Further optionally, the protruding portion and the sub-recessed portion are both planar; the first curved surface section is a convex curved surface, the first curved surface section protrudes to one side of the protruding portion, one end of the first curved surface section is tangent to the protruding portion, and the other end of the first curved surface section is tangent to the transition surface section;
the second curved surface section is a concave curved surface, the second curved surface section is concave to one side of the sub-concave part, one end of the second curved surface section is tangent to the sub-concave part, and the other end of the second curved surface section is tangent to the transition surface section.
Further optionally, a tangent point of the convex part and the first curved surface section is A, and a tangent point of the sub-concave part and the second curved surface section is B; the method meets the following conditions: θ < 0.05 °;
the θ is an included angle between a line a and a line B, the line a is a line passing through the point a and tangent to both the convex portion and the first curved surface section, and the line B is a line passing through the point B and tangent to both the sub-concave portion and the second curved surface section.
Further optionally, the heat exchange infinitesimal is a three-dimensional polygonal surface, corners of the polygonal surface are respectively provided with a sub-concave part, and a central point of the polygonal surface is provided with the convex part; the edges of the polygonal surface are arc lines, and the protruding direction of the arc lines is consistent with that of the protruding parts.
Further alternatively, two adjacent curved surfaces are formed with a transition curve, the transition curve connects a center point of the polygonal surface and a midpoint of an arc line and the transition curve includes a first curve and a second curve connected with the first curve;
the first curve is close to the center point of the polygonal surface, and the second curve is close to the midpoint of the arc line; the curvature radius of the first curve is equal to that of the second curve, and the length of the first curve is equal to that of the second curve.
The invention also provides a heat exchange plate, which comprises a main body plate, wherein the main body plate is provided with a main heat exchange area; the main heat exchange area is composed of a plurality of heat exchange microelements of any one of the above, and the adjacent heat exchange microelements are spliced together to form a concave part by a plurality of sub-concave parts.
Further optionally, the body plate further comprises a first plane, a second plane, and a central plane; the first plane and the second plane are arranged oppositely, and the central plane is positioned between the first plane and the second plane; the convex part of each heat exchange element is positioned on the first plane and protrudes from the central plane to the first plane; the sub-concave part of each heat exchange primordial is positioned on the second plane and is concave to the second plane from the central plane; the area of the convex part is larger than that of the concave part;
wherein the central plane is a plane passing through a central point of the body plate.
Further alternatively, the following is satisfied: s0/s is more than 0.4 and less than 0.6;
and s0 is the distance between the midpoint of the arc line of the heat exchange infinitesimal and the first plane, and s is the distance between the convex part and the concave part.
Further optionally, in the plurality of heat exchange microelements sequentially arranged around the same point, a line of projection of the central points of the plurality of concave parts on the central plane forms a regular polygon, and the projection of the central points of the convex parts on the central plane is the central point of the regular polygon.
Further optionally, the heat exchange plate further comprises a side plate, and the side plate is connected with the edge of the main body plate; the method meets the following conditions: cosα=h/(h+s);
wherein alpha is an included angle between the plate surface of the side plate and the central plane, s is a distance between the convex part and the concave part, and h is the thickness of the main body plate.
The invention also provides a plate heat exchanger, which comprises a front end plate, a rear end plate and any one of the heat exchange plates, wherein a plurality of heat exchange plates are arranged, and the plurality of heat exchange plates are sequentially stacked and arranged between the front end plate and the rear end plate; a cavity is formed between two adjacent heat exchange plates.
Compared with the prior art, the invention has the following main beneficial effects:
designing a convex part to be connected with a plurality of sub-concave parts around the convex part through a curved surface, wherein the curved surface is of a multi-section structure and comprises a first curved surface section and a second curved surface section; the first curved surface section is connected with the convex part, the second curved surface section is connected with the sub-concave part, and the curvature direction of the first curved surface section is different from the curvature direction of the second curved surface section; the curved surface structure is optimized, the convex parts and the concave parts of each sub-are in smooth transition, the thickness uniformity of each part of the heat exchange plate is ensured, the cracking risk is reduced, the processing process of the heat exchange plate is simplified, the processing quality of the heat exchange plate is improved, and the problems of high processing difficulty, uneven thickness, high cracking risk and low reliability of the heat exchange plate are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic diagram of a heat exchange micro-element embodiment provided by the invention;
FIG. 2 is a schematic view of a heat exchanger plate according to an embodiment of the present invention;
FIG. 3 is a schematic view of the overall structure of an embodiment of a heat exchanger plate according to the present invention;
fig. 4 is a schematic structural view of an embodiment of a plate heat exchanger provided by the invention;
in the figure:
1-a heat exchange plate; 11-a body plate; 111-a main heat exchange zone; 112-heat exchange infinitesimal; 113-a projection; 114-a sub-depression; 115-a first curved section; 116-a second curved section; 117-transition surface section; 118-first curve; 119-a second curve; 1110-an arcuate line; 1111-A angular holes; 1112-B angular aperture; 1113-C angular aperture; 1114-D angular holes; 12-side plates;
2-plate heat exchanger; 21-a front end plate; 211-first connector; 212-a second linker; 213-third linker; 214-fourth linker; 22-rear end plate.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
In the prior art, a plurality of raised points and a plurality of recessed points are formed in a heat exchange area of a heat exchange plate, adjacent raised points are in transition through a concave curved surface, adjacent recessed points are in transition through a convex curved surface, and two adjacent heat exchange plates are stacked to realize contact between the recessed points and the raised points; however, the convex points and the concave points are planes, the curvature change at the transition part of the planes and the curved surface is large, the structures of the concave curved surface and the convex curved surface are complex, the uneven thickness and the cracking risk of the heat exchange plate are increased, and the performance of the heat exchange plate is further influenced;
the invention creatively provides a heat exchange infinitesimal for a heat exchange plate; the heat exchange microelement comprises a convex part and a plurality of sub-concave parts, wherein the convex part is connected with each sub-concave part through a curved surface, and the curved surface is of a multi-section structure and comprises a first curved surface section and a second curved surface section which are sequentially arranged; the curvature direction of the first curved surface section is different from the curvature direction of the second curved surface section;
the curved surface structure is optimized, the structure is compact, the convex parts and the concave parts of each sub-are in smooth transition, the thickness uniformity of each part of the heat exchange plate is ensured, the cracking risk is reduced, the processing process of the heat exchange plate is simplified, the processing quality of the heat exchange plate is improved, and the problems of high processing difficulty, uneven thickness, high cracking risk and low reliability of the heat exchange plate are solved.
< heat exchange primordia >
As shown in fig. 1, the present embodiment provides a heat exchange micro-element 112, which includes a protruding portion 113 and a plurality of sub-recessed portions 114 surrounding the protruding portion 113; the convex part 113 is connected with each sub-concave part 114 through a curved surface, and the curved surface is of a multi-section structure and comprises a first curved surface section 115, a second curved surface section 116 and a transition surface section 117; the first curved surface section 115 is connected with the convex part 113, the second curved surface section 116 is connected with the sub-concave part 114, the curvature direction of the first curved surface section 115 is different from that of the second curved surface section 116, the curvature directions of all parts of the first curved surface section 115 are consistent, the curvature directions of all parts of the second curved surface section 116 are consistent, and the quality of the curved surface is ensured; the transition surface section 117 is positioned between the first curved surface section 115 and the second curved surface section 116, so that the structure of the curved surface is optimized, and the processing difficulty of the curved surface is reduced;
in this embodiment, one heat exchange micro-element 112 includes four sub-concave portions 114; the four heat exchange microelements 112 are sequentially arranged around the same point, the four sub-concave parts 114 are spliced to form a concave part, and the projection connecting lines of the central points of the four convex parts 113 on the same surface form a regular quadrangle.
Aiming at the problem that the heat exchange plate 1 is uneven in thickness and easy to crack due to the complex structure of the curved surface, the embodiment provides that the convex parts 113 and the sub-concave parts are all planes, and the sub-concave parts are uniformly distributed around the convex parts 113; the first curved surface section 115 is a convex curved surface, and the first curved surface section 115 is convex to one side of the convex portion 113; the second curved surface section 116 is a concave curved surface, and the second curved surface section 116 is concave to one side of the sub-concave part 114;
the convex part 113 is tangent to the first curved surface section 115, and the sub-concave part 114 is tangent to the second curved surface section 116; the two ends of the transition surface section 117 are tangent to the first curved surface section 115 and the second curved surface section 116 respectively, the first curved surface and the second curved surface are in smooth transition, the continuity of the curved surfaces is guaranteed, the large curvature change at the joint of the first curved surface section 115 and the transition surface section 117 and the joint of the second curved surface section 116 and the transition surface section 117 is avoided, and the cracking risk of the heat exchange plate 1 can be remarkably reduced.
Further, the tangent point of the convex portion 113 and the first curved surface section 115 is a, and the tangent point of the sub-concave portion 114 and the second curved surface section 116 is B; the method meets the following conditions: θ < 0.05 °;
where θ is an included angle between a line a and a line B, where a is a line passing through the point a and tangent to both the convex portion 113 and the first curved surface section 115, and B is a line passing through the point B and tangent to both the sub-concave portion 114 and the second curved surface section 116.
Aiming at the problem of poor heat exchange performance caused by unreasonable structural design of the heat exchange plate 1, the embodiment provides that the main body plate 11 further comprises a first plane, a second plane and a central plane; the first plane and the second plane are arranged oppositely, and the central plane is positioned between the first plane and the second plane; the convex part 113 of each heat exchange micro element 112 is positioned on the first plane and protrudes from the central plane to the first plane; the sub-concave part 114 of each heat exchange micro-element 112 is positioned on the second plane and is concave from the central plane to the second plane; the area of the convex portion 113 is larger than that of the concave portion; preferably, the area of the protrusion 113 is four times the area of the depression;
wherein the central plane is the plane passing through the central point of the body plate 11.
Aiming at the problem that the heat exchange efficiency of the heat exchange plate is low due to unreasonable structural design of the heat exchange micro-elements 112, the embodiment proposes that the heat exchange micro-elements 112 are three-dimensional polygonal surfaces, each corner of each polygonal surface is provided with a sub-concave part 114, and the center point of each polygonal surface is provided with a convex part 113; the sides of the polygonal surface are arc lines 1110, and the protruding direction of the arc lines 1110 is consistent with that of the protruding parts 113; preferably, the polygonal surface is a square surface, and four corners of the square surface are in rounded transition.
Aiming at the problem that the heat exchange efficiency of the heat exchange plate is low due to unreasonable structural design of a transition curve between two adjacent curved surfaces, the embodiment provides that the two adjacent curved surfaces are formed with transition curves which are connected with the center point of the polygonal surface and the middle point of the arc line 1110, and the transition curves comprise a first curve 118 and a second curve 119 connected with the first curve 118; the first curve 118 is near the center point of the polygonal surface and the second curve 119 is near the midpoint of the arcuate line 1110; the radius of curvature of the first curve 118 is equal to the radius of curvature of the second curve 119, and the length of the first curve 118 is equal to the length of the second curve 119; the large curvature change at the joint of the first curve 118 and the second curve 119 is avoided, and the cracking risk of the heat exchange plate 1 is remarkably reduced.
Preferably, the heat exchange microelements 112 are symmetrical in front-to-back and left-to-right.
< Heat exchange plate >
As shown in fig. 2 and 3, the present embodiment provides a heat exchange plate 1 including a main body plate 11, the main body plate 11 being formed with a main heat exchange area 111; the main heat exchange area 111 is formed by a plurality of heat exchange micro-elements 112 as described in any one of the above, and the main heat exchange area 111 is mirror-symmetrical with respect to the length direction of the heat exchange plate 1; adjacent heat exchange microelements 112 are spliced together, so that a plurality of sub-concave parts 114 form concave parts; specifically, the plurality of heat exchange micro-elements 112 are arranged according to a regular array and form a main heat exchange area 111, and the adjacent plurality of heat exchange micro-elements 112 are spliced together, so that a plurality of sub-concave parts 114 form concave parts; the convex part 113 is provided with a high welding point plane, the concave part is provided with a low welding point plane, when two adjacent heat exchange plates 1 are connected, the concave part of one heat exchange plate 1 is correspondingly arranged with the convex part 113 of the other heat exchange plate 1, so that the two heat exchange plates 1 are contacted, and the welding strength is improved;
the protruding portions 113 are uniformly distributed in the main heat exchange area 111, the recessed portions are uniformly distributed in the main heat exchange area 111, and the protruding portions 113 and the recessed portions are arranged at intervals.
Aiming at the problem of poor heat exchange performance caused by unreasonable structural design of the heat exchange plate 1, the embodiment provides that the main body plate 11 further comprises a first plane, a second plane and a central plane; the first plane and the second plane are arranged oppositely, and the central plane is positioned between the first plane and the second plane; the convex part 113 of each heat exchange micro-element 112 is positioned on the first plane, and the convex part of each heat exchange micro-element 112 is protruded from the central plane to the first plane; the sub-concave part 114 of each heat exchange micro-element 112 is positioned on the second plane, and the sub-concave part 114 of each heat exchange micro-element 112 is concave from the central plane to the second plane; the area of the convex portion 113 is larger than that of the concave portion; preferably, the area of the protrusion 113 is four times the area of the depression;
wherein the central plane is the plane passing through the central point of the body plate 11.
Further, the following are satisfied: s0/s is more than 0.4 and less than 0.6;
where s0 is the distance between the midpoint of the arcuate line 1110 and the first plane, and s is the distance between the protrusion 113 and the recess.
Preferably, among the plurality of heat exchange microelements 112 sequentially arranged around the same point, a line of projection of the central points of the plurality of concave portions on the central plane forms a regular polygon, and the projection of the central points of the convex portions 113 on the central plane is the central point of the regular polygon.
Aiming at the problem that the unreasonable structural design of the side plates of the heat exchange plates leads to unreliable connection of a plurality of heat exchange plates, the embodiment provides that the heat exchange plate 1 further comprises the side plates 12, and when the plurality of heat exchange plates 1 are stacked, the two adjacent side plates 12 are completely attached to ensure the welding strength of the two adjacent heat exchange plates 1; the side plate 12 is connected with the edge of the main body plate 11; the method meets the following conditions: cosα=h/(h+s);
where α is an angle between the plate surface of the side plate 12 and the center plane, s is a distance between the convex portion 113 and the concave portion, and h is a thickness of the main body plate 11.
The main heat exchange area 111 is the middle area of the heat exchange plate 1, and angular holes are formed around the main heat exchange area 111; in this embodiment, the heat exchange plate 1 has a quadrilateral structure, and four corners of the quadrilateral structure are respectively formed with an a-corner hole 1111, a B-corner hole 1112, a C-corner hole 1113 and a D-corner hole 1114, the a-corner hole 1111 and the B-corner hole 1112 are oppositely arranged along the length direction of the heat exchange plate 1, the C-corner hole 1113 and the D-corner hole 1114 are oppositely arranged along the length direction of the heat exchange plate 1, the a-corner hole 1111 and the C-corner hole 1113 are oppositely arranged along the length width direction of the heat exchange plate 1, and the B-corner hole 1112 and the D-corner hole 1114 are oppositely arranged along the length width direction of the heat exchange plate 1; the A angle hole 1111 is communicated with a first liquid inlet joint, the B angle hole 1112 is communicated with a first liquid outlet joint, the C angle hole 1113 is communicated with a second liquid inlet joint, and the D angle hole 1114 is communicated with a second liquid outlet joint;
when a plurality of heat exchange plates 1 are stacked, a cavity is formed between two adjacent heat exchange plates 1, and an A angle hole 1111, a B angle hole 1112, a C angle hole 1113 and a D angle hole 1114 are communicated with the cavity; the fluid can enter the cavity through the first liquid inlet connector and be discharged through the first liquid outlet connector; or, the fluid can enter the cavity through the second liquid inlet connector and be discharged through the second liquid outlet connector.
The heat exchange plate 1 in the embodiment ensures the molding effect of the heat exchange plate 1 through a novel curved surface modeling design method on the basis of ensuring compact structure and heat exchange performance, so that the thickness of each part is uniform, and the problems of high processing difficulty and easiness in cracking caused by complex curved surfaces of the plate heat exchanger are effectively solved.
< plate Heat exchanger >
As shown in fig. 4, the present embodiment proposes a plate heat exchanger 2 including a front end plate 21, a rear end plate 22, and heat exchange plates 1 according to any one of the above, the heat exchange plates 1 being provided in plurality, and the plurality of heat exchange plates 1 being stacked in order between the front end plate 21 and the rear end plate 22; a cavity is formed between two adjacent heat exchange plates 1, and when fluid flows through the cavity, heat exchange is formed by the heat exchange plates 1; specifically, the plate heat exchanger 2 is mainly formed by stacking a plurality of heat exchange plates 1 and brazing filler metal and then welding the stacked heat exchange plates at a high temperature;
the front end plate 21 and the rear end plate 22 are of quadrilateral structures, a front corner hole is formed in each of four corners of the front end plate 21, the front corner hole comprises an a front corner hole, a B front corner hole, a C front corner hole and a D front corner hole, the a front corner hole is arranged corresponding to the A corner hole 1111, the B front corner hole is arranged corresponding to the B corner hole 1112, the C front corner hole is arranged corresponding to the C corner hole 1113, and the D front corner hole is arranged corresponding to the D corner hole 1114; the front corner hole a, the front corner hole b, the front corner hole c and the front corner hole d are respectively provided with a joint, and the joints are connected with the outer tube; specifically, the joints include a first joint 211, a second joint 212, a third joint 213, and a fourth joint 214, the first joint 211 being disposed at the a-front corner hole, the second joint 212 being disposed at the b-front corner hole, the third joint 213 being disposed at the c-front corner hole, the fourth joint 214 being disposed at the d-front corner hole; each joint is communicated with a pipe, the flow area of the first joint 211 is larger than that of the fourth joint 214, and the flow area of the second joint 212 is larger than that of the third joint 213; the heat exchange plate 1 comprises a first heat exchange plate, a second heat exchange plate and a third heat exchange plate which are sequentially arranged, wherein the cavity comprises a first cavity and a second cavity, the first cavity is formed between the first heat exchange plate and the second heat exchange plate, and the second cavity is formed between the second heat exchange plate and the third heat exchange plate; the first joint 211 and the fourth joint 214 are both in communication with the first cavity, and the second joint 212 and the third joint 213 are both in communication with the second cavity; the external first fluid can enter the first cavity through the first connector 211 and then be discharged through the fourth connector 214; the external second fluid can enter the second cavity through the second connector 212 and then be discharged through the third connector 213; the first fluid completes heat exchange with the second fluid flowing through the second cavity when flowing through the first cavity; wherein the first fluid and the second fluid are the same kind of fluid or different kinds of fluid with different temperatures.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
1. A heat exchange micro element for a heat exchange plate; the heat exchange micro-element is characterized by comprising a convex part and a plurality of sub-concave parts surrounding the convex part; the convex parts are connected with the sub-concave parts through curved surfaces, and the curved surfaces are of multi-section structures and comprise a first curved surface section and a second curved surface section;
the first curved surface section is connected with the convex part, the second curved surface section is connected with the sub-concave part, and the curvature direction of the first curved surface section is different from that of the second curved surface section;
preferably, the curved surface further comprises a transition surface section, and the transition surface section is located between the first curved surface section and the second curved surface section.
2. The heat exchange micro-element according to claim 1, wherein the convex part and the concave part are both planes; the first curved surface section is a convex curved surface, the first curved surface section protrudes to one side of the protruding portion, one end of the first curved surface section is tangent to the protruding portion, and the other end of the first curved surface section is tangent to the transition surface section;
the second curved surface section is a concave curved surface, the second curved surface section is concave to one side of the sub-concave part, one end of the second curved surface section is tangent to the sub-concave part, and the other end of the second curved surface section is tangent to the transition surface section.
3. The heat exchange micro-element according to claim 2, wherein the tangent point of the convex part and the first curved surface section is A, and the tangent point of the sub-concave part and the second curved surface section is B; the method meets the following conditions: θ < 0.05 °;
the θ is an included angle between a line a and a line B, the line a is a line passing through the point a and tangent to both the convex portion and the first curved surface section, and the line B is a line passing through the point B and tangent to both the sub-concave portion and the second curved surface section.
4. The heat exchange micro-element according to claim 1, wherein the heat exchange micro-element is a three-dimensional polygonal surface, each corner of the polygonal surface is provided with a sub-concave part, and the central point of the polygonal surface is provided with the convex part; the edges of the polygonal surface are arc lines, and the protruding direction of the arc lines is consistent with that of the protruding parts.
5. The heat exchange micro-element according to claim 4, wherein two adjacent curved surfaces are formed with a transition curve connecting a center point of the polygonal surface and a midpoint of an arc line and including a first curve and a second curve connected with the first curve;
the first curve is close to the center point of the polygonal surface, and the second curve is close to the midpoint of the arc line; the curvature radius of the first curve is equal to that of the second curve, and the length of the first curve is equal to that of the second curve.
6. A heat exchanger plate comprising a main body plate, said main body plate being formed with a main heat exchanger zone; the main heat exchange area is composed of a plurality of heat exchange microelements according to any one of claims 1 to 5, and the adjacent heat exchange microelements are spliced together, so that a plurality of the sub-concave parts form concave parts.
7. A heat exchanger plate according to claim 6, wherein the body plate further comprises a first plane, a second plane and a central plane; the first plane and the second plane are arranged oppositely, and the central plane is positioned between the first plane and the second plane; the convex part of each heat exchange element is positioned on the first plane and protrudes from the central plane to the first plane; the sub-concave part of each heat exchange primordial is positioned on the second plane and is concave to the second plane from the central plane; the area of the convex part is larger than that of the concave part;
wherein the central plane is a plane passing through a central point of the body plate.
8. A heat exchanger plate according to claim 7, wherein: s0/s is more than 0.4 and less than 0.6;
and s0 is the distance between the midpoint of the arc line of the heat exchange infinitesimal and the first plane, and s is the distance between the convex part and the concave part.
9. A heat exchange plate according to claim 7, wherein, among the plurality of heat exchange microelements sequentially arranged around the same point, a line of projection of the center points of the plurality of concave portions on the center plane constitutes a regular polygon, and a projection of the center points of the convex portions on the center plane is the center point of the regular polygon.
10. A heat exchanger plate according to claim 7, further comprising a side plate connected to the rim of the body plate; the method meets the following conditions: cosα=h/(h+s);
wherein alpha is an included angle between the plate surface of the side plate and the central plane, s is a distance between the convex part and the concave part, and h is the thickness of the main body plate.
11. A plate heat exchanger comprising a front end plate, a rear end plate and a heat exchanger plate according to any one of claims 6 to 10, wherein a plurality of heat exchanger plates are provided, a plurality of heat exchanger plates being stacked in sequence between the front end plate and the rear end plate; a cavity is formed between two adjacent heat exchange plates.
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| CN202311201960.XA CN117288008B (en) | 2023-09-15 | 2023-09-15 | Heat exchange microelement, heat exchange plate and plate heat exchanger |
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| CN202311201960.XA CN117288008B (en) | 2023-09-15 | 2023-09-15 | Heat exchange microelement, heat exchange plate and plate heat exchanger |
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