HEAT EXCHANGE PLATE FOR PLATE HEAT EXCHANGER, AND PLATE HEAT EXCHANGER
A heat exchange plate for use in a plate-type heat exchanger, and a plate-type heat exchanger having same. The heat exchange plate having a heat exchange portion and a port portion; fluids having different temperatures exchange heat with each other by means of the heat exchange portion; an opening used as the port of the heat exchanger is formed in the port portion. The heat exchange plate includes a first side and a second side in a direction perprendicular to the heat exchange plate; the port portion is provided with a contact porition that is in contact with the port portion of another heat exchange plate at the first side, and a protrusion protruding towards the second side relative to the contact portion. The heat exchange plate and the plate-type heat exchanger of the embodiments of the present invention can, for example, improve the quality of the port portion of the heat exchange plate of the heat exchanger.
[0000.1] This application is a National Stage application of International Patent Application No. PCT/CN2020/124321, filed on Oct. 28, 2020, which claims priority to Chinese Application No. 201911063164.8, filed on Oct. 31, 2019, and Chinese Application No. 201911189175.0, filed on Nov. 27, 2019, each of which is hereby incorporated by reference in its entirety.
TECHNICAL FIELDEmbodiments of the present invention relate to a heat exchange plate for plate heat exchanger, and a plate heat exchanger.
BACKGROUNDA plate heat exchanger comprises cover plates, heat exchange plates, connecting pipes, etc.
SUMMARYAn objective of embodiments of the present invention is to provide a heat exchange plate for a plate heat exchanger, and a plate heat exchanger having same, so that the quality of a port portion of the heat exchange plate of the heat exchanger can be improved, for example.
According to an embodiment of the present invention, a heat exchange plate for a plate heat exchanger is provided, the heat exchange plate comprising: a heat exchange portion and a port portion, wherein fluids having different temperatures exchange heat with each other through the heat exchange portion, and an opening used as a port of the heat exchanger is formed in the port portion, wherein the heat exchange plate comprises a first side and a second side in a direction perpendicular to the heat exchange plate; and the port portion is provided with a contact portion that is in contact with the port portion of another heat exchange plate on the first side, and a protrusion protruding toward the second side relative to the contact portion.
According to an embodiment of the present invention, the port portion comprises a plurality of protrusions distributed in a circumferential direction around the opening.
According to an embodiment of the present invention, when viewed in the direction perpendicular to the heat exchange plate, the plurality of protrusions are each in a circular, rectangular or trapezoidal shape.
According to an embodiment of the present invention, the port portion comprises an annular contact portion and an annular protrusion surrounding the opening, and the annular contact portion and the annular protrusion adjoin each other.
According to an embodiment of the present invention, the port portion comprises at least two annular protrusions surrounding the opening, and two of the at least two annular protrusions adjoin each other and have different protrusion amounts relative to the contact portion; or two of the at least two annular protrusions are separated by the annular contact portion.
According to an embodiment of the present invention, the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; and a second annular portion surrounding the first annular portion and adjoining the first annular portion, wherein at least a part of one of the first annular portion and the second annular portion constitutes the protrusion.
According to an embodiment of the present invention, a plurality of circumferentially-spaced parts of at least one of the first annular portion and the second annular portion constitute a plurality of protrusions; or one of the first annular portion and the second annular portion constitutes an annular protrusion; or one of the first annular portion and the second annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of the other of the first annular portion and the second annular portion constitute a plurality of protrusions.
According to an embodiment of the present invention, the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; a second annular portion surrounding the first annular portion and adjoining the first annular portion; and a third annular portion surrounding the second annular portion and adjoining the second annular portion, wherein at least a part of at least one of the first annular portion, the second annular portion and the third annular portion constitutes a protrusion.
According to an embodiment of the present invention, the second annular portion and the third annular portion protrude toward the second side relative to a part of a surface of the port portion to constitute protrusions, at least a part of the first annular portion constitutes a contact portion, and a protrusion amount of the second annular portion relative to the contact portion is less than a protrusion amount of the third annular portion.
According to an embodiment of the present invention, one of the first annular portion, the second annular portion and the third annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of a further one of the first annular portion, the second annular portion and the third annular portion constitute a plurality of protrusions.
According to an embodiment of the present invention, the port portion comprises: a plurality of annular portions surrounding the opening, wherein an inner edge of the innermost annular portion constitutes an edge of the opening, two adjacent annular portions of the plurality of annular portions adjoin each other, and at least a part of at least one of the plurality of annular portions constitutes the protrusion.
According to an embodiment of the present invention, at least one of the plurality of annular portions protrudes toward the second side relative to a part of a surface of the port portion to constitute an annular protrusion; or a plurality of circumferentially-spaced parts of at least one of the plurality of annular portions protrude toward the second side relative to the part of the surface of the port portion to constitute a plurality of protrusions.
According to an embodiment of the present invention, a plate heat exchanger is further provided, comprising: a plurality of heat exchange plates, each being the heat exchange plate described above.
According to an embodiment of the present invention, protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, and a gap between two protrusions is in the range of 0.2-0.3 mm.
According to an embodiment of the present invention, protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, a gap between two protrusions is in the range of 0.2-0.3 mm, and the gap between the two protrusions is filled with a brazing alloy for brazing the plate heat exchanger, so as to braze the two protrusions together.
The heat exchange plate and the plate heat exchanger according to the embodiments of the present invention can improve the quality of the port portion of the heat exchange plate of the heat exchanger, for example.
The present invention will be further described below in conjunction with the accompanying drawings and specific implementations.
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Each of the first annular portion P1 and the second annular portion P2 has a predetermined width, and may be in a circular ring shape or other suitable shapes according to the shape of the opening 12.
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In some embodiments of the present invention, the heat exchange plate 10 is formed from a plate, such as by stamping. After the heat exchange plate 10 is formed, the plate has an undeformed portion that is not deformed toward the first side or the second side. The undeformed portion is in an initial plane, i.e., an undeformed plane in which the plate lies before being machined (e.g., stamped). Protrusions 15 protrude from the initial plane toward the second side, and at least one of a plurality of annular portions is not provided with a protrusion, i.e., is located in the initial plane.
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According to an embodiment of the present invention, when the size of a port of each heat exchange plate is larger and a larger number of heat exchange plates are stacked, a risk of warpage of the heat exchange plates can be significantly reduced, a product pass rate can be improved, and the flatness of the formed heat exchange plate in the vicinity of the opening for forming the port can be improved.
According to an embodiment of the present invention, a stepped structure is provided in the vicinity of the opening of the heat exchange plate, i.e., the original entire plane is reconfigured as two or more planes with different heights, so that the structure can improve the flatness of the heat exchange plate. In addition, this structure can significantly enhance the strength of the formed heat exchange plate in the vicinity of the opening and prevent the occurrence of warpage.
According to an embodiment of the present invention, warpage deformation that may occur if a large number of heat exchange plates are stacked or an opening of each heat exchange plate is larger is eliminated, the flatness of the heat exchange plate in the vicinity of the opening is improved, the brazing quality of the heat exchange plates is improved, and the strength of the entire structure of the heat exchanger is finally increased. In addition, the product pass rate is improved.
It should be noted that the features in one or more of the above embodiments can be combined into new embodiments. The features in an embodiment can be used in a further embodiment unless the features in the embodiment conflict with the technical solution of the further embodiment.
While the present disclosure has been illustrated and described with respect to a particular embodiment thereof, it should be appreciated by those of ordinary skill in the art that various modi-fications to this disclosure may be made without departing from the spirit and scope of the present disclosure.
Claims
1. A heat exchange plate for a plate heat exchanger, the heat exchange plate comprising:
- a heat exchange portion and a port portion, wherein fluids having different temperatures exchange heat with each other through the heat exchange portion, and an opening used as a port of the heat exchanger is formed in the port portion,
- wherein the heat exchange plate comprises a first side and a second side in a direction perpendicular to the heat exchange plate; and the port portion is provided with a contact portion that is in contact with the port portion of another heat exchange plate on the first side, and a protrusion protruding toward the second side relative to the contact portion.
2. The heat exchange plate for a plate heat exchanger as claimed in claim 1, wherein
- the port portion comprises a plurality of protrusions distributed in a circumferential direction around the opening.
3. The heat exchange plate for a plate heat exchanger as claimed in claim 2, wherein
- when viewed in the direction perpendicular to the heat exchange plate, the plurality of protrusions are each in a circular, rectangular or trapezoidal shape.
4. The heat exchange plate for a plate heat exchanger as claimed in claim 1, wherein
- the port portion comprises an annular contact portion and an annular protrusion surrounding the opening, and the annular contact portion and the annular protrusion adjoin each other.
5. The heat exchange plate for a plate heat exchanger as claimed in claim 4, wherein
- the port portion comprises at least two annular protrusions surrounding the opening, and two of the at least two annular protrusions adjoin each other and have different protrusion amounts relative to the contact portion; or two of the at least two annular protrusions are separated by the annular contact portion.
6. The heat exchange plate for a plate heat exchanger as claimed in claim 1, wherein
- the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; and a second annular portion surrounding the first annular portion and adjoining the first annular portion, wherein at least a part of one of the first annular portion and the second annular portion constitutes the protrusion.
7. The heat exchange plate for a plate heat exchanger as claimed in claim 6, wherein
- a plurality of circumferentially-spaced parts of at least one of the first annular portion and the second annular portion constitute a plurality of protrusions; or
- one of the first annular portion and the second annular portion constitutes an annular protrusion; or
- one of the first annular portion and the second annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of the other of the first annular portion and the second annular portion constitute a plurality of protrusions.
8. The heat exchange plate for a plate heat exchanger as claimed in claim 1, wherein
- the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; a second annular portion surrounding the first annular portion and adjoining the first annular portion; and a third annular portion surrounding the second annular portion and adjoining the second annular portion, wherein at least a part of at least one of the first annular portion, the second annular portion and the third annular portion constitutes a protrusion.
9. The heat exchange plate for a plate heat exchanger as claimed in claim 8, wherein
- the second annular portion and the third annular portion protrude toward the second side relative to a part of a surface of the port portion to constitute protrusions, at least a part of the first annular portion constitutes a contact portion, and a protrusion amount of the second annular portion relative to the contact portion is less than a protrusion amount of the third annular portion.
10. The heat exchange plate for a plate heat exchanger as claimed in claim 8, wherein
- one of the first annular portion, the second annular portion and the third annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of a further one of the first annular portion, the second annular portion and the third annular portion constitute a plurality of protrusions.
11. The heat exchange plate for a plate heat exchanger as claimed in claim 1, wherein
- the port portion comprises: a plurality of annular portions surrounding the opening, wherein an inner edge of the innermost annular portion constitutes an edge of the opening, two adjacent annular portions of the plurality of annular portions adjoin each other, and at least a part of at least one of the plurality of annular portions constitutes the protrusion.
12. The heat exchange plate for a plate heat exchanger as claimed in claim 11, wherein
- at least one of the plurality of annular portions protrudes toward the second side relative to a part of a surface of the port portion to constitute an annular protrusion; or
- a plurality of circumferentially-spaced parts of at least one of the plurality of annular portions protrude toward the second side relative to the part of the surface of the port portion to constitute a plurality of protrusions.
13. A plate heat exchanger, comprising:
- a plurality of heat exchange plates, each being the heat exchange plate as claimed in claim 1.
14. The plate heat exchanger as claimed in claim 13, wherein
- protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, and a gap between two protrusions is in the range of 0.2-0.3 mm.
15. The plate heat exchanger as claimed in claim 13, wherein
- protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, a gap between two protrusions is in the range of 0.2-0.3 mm, and the gap between the two protrusions is filled with a brazing alloy for brazing the plate heat exchanger, so as to braze the two protrusions together.
Type: Application
Filed: Oct 28, 2020
Publication Date: May 11, 2023
Inventors: Zhifeng ZHANG (Zhejiang), Jun LUO (Zhejiang)
Application Number: 17/773,118