Plate heat exchanger

Abstract

The utility model discloses a plate heat exchanger, and relates to the technical field of heat exchangers. The plate heat exchanger comprises a plurality of first plates and a plurality of second plates. The multiple first plates and the multiple second plates are sequentially arranged in an overlapped mode, a first heat exchange flow channel is formed between each first plate and one adjacent second plate, a second heat exchange flow channel is formed between each first plate and the other adjacent second plate, each first heat exchange flow channel comprises a main flow channel and two side flow channels, and the two side flow channels are oppositely arranged on the two sides of the main flow channel; the height of the section of the side flow channel is larger than that of the section of the main flow channel. Compared with the prior art, due to the fact that the side flow channels with the section height larger than that of the main flow channel are adopted in the plate heat exchanger, the flow resistance borne by heat exchange media can be effectively reduced, the inlet pressure of the heat exchange media is reduced, the distribution uniformity of the heat exchange media is improved, the heat exchange efficiency is improved, and the plate heat exchanger is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and in particular to a plate heat exchanger. Background Art

[0002] A plate heat exchanger is a highly efficient heat exchanger composed of a series of stacked metal plates. Flow channels are formed between the plates. These channels consist of alternating first and second heat exchange channels. The first channels are used to circulate a heat exchange medium, while the second channels are used to circulate the fluid to be exchanged. The fluid to be exchanged and the heat exchange medium exchange heat through the plates. As the heat exchange medium flows through the first channels, due to the uniform height throughout the channels, the liquid tension and friction create significant flow resistance. This results in uneven distribution of the heat exchange medium within the channels, directly impacting heat exchange efficiency.

[0003] In view of this, it is particularly important to design and manufacture a plate heat exchanger with high heat exchange efficiency, especially in heat exchanger production. Utility Model Content

[0004] The purpose of the utility model is to provide a plate heat exchanger that can effectively reduce the flow resistance of the heat exchange medium, thereby reducing the inlet pressure of the heat exchange medium, improving the uniformity of the heat exchange medium distribution, improving the heat exchange efficiency, and being stable and reliable.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A plate heat exchanger includes multiple first plates and multiple second plates, which are arranged in sequence overlapping each other, and a first heat exchange channel is formed between the first plate and an adjacent second plate, and a second heat exchange channel is formed between the first plate and another adjacent second plate, wherein the first heat exchange channel includes a main channel and two side channels, and the two side channels are arranged on both sides of the main channel relative to each other and are both connected to the main channel, and the cross-sectional height of the side channel is greater than the cross-sectional height of the main channel.

[0007] Optionally, the area of ​​the main flow channel is equal to the area of ​​the second heat exchange flow channel.

[0008] Optionally, the first plate includes a first main body and two first protrusions, the two first protrusions are relatively arranged at the two ends of the first main body and are both connected to the first main body, the first protrusion is spaced apart from an adjacent second plate to form a side flow channel, and the first protrusion is abutted against another adjacent second plate.

[0009] Optionally, the first main body is provided with two first through holes, each first protrusion is provided with a second through hole, the first through hole is used to connect two adjacent second heat exchange channels, and the second through hole is used to connect two adjacent first heat exchange channels.

[0010] Optionally, the first protrusion is provided with an arc-shaped notch, and the position of the arc-shaped notch corresponds to the position of the first through hole.

[0011] Optionally, the area of ​​the first through hole is equal to the area of ​​the second through hole, and / or the two first through holes and the two second through holes are distributed in a rectangular array.

[0012] Optionally, the second plate includes a second main body and two second protrusions, the two second protrusions are arranged at intervals and are both connected to the second main body, the second protrusion is abutted against the first main body of an adjacent first plate, and is spaced apart from the first main body of another adjacent first plate, and the first heat exchange channel is arranged outside the second protrusion.

[0013] Optionally, the second main body is provided with two third through holes, each second protrusion is provided with a fourth through hole, each third through hole is communicated with a second through hole, and each fourth through hole is communicated with a first through hole.

[0014] Optionally, the second plate further includes a surrounding edge portion, which is arranged outside the second main body portion; the first plate further includes a retaining edge portion, which is simultaneously arranged outside the first main body portion and the two first protrusions; the surrounding edge portion and the retaining edge portion are fitted together and seal-welded.

[0015] Optionally, the plate heat exchanger further includes fins, and the fins are arranged in the main flow channel.

[0016] The plate heat exchanger provided by the utility model has the following beneficial effects:

[0017] The plate heat exchanger provided by the present invention comprises a plurality of first plates and a plurality of second plates arranged in an overlapping manner. A first heat exchange channel is formed between a first plate and an adjacent second plate, and a second heat exchange channel is formed between a first plate and another adjacent second plate. The first heat exchange channel comprises a main channel and two side channels, the two side channels being arranged on opposite sides of the main channel and both communicating with the main channel, with the cross-sectional height of the side channels being greater than that of the main channel. Compared with the prior art, the plate heat exchanger provided by the present invention, due to the use of side channels having a cross-sectional height greater than that of the main channel, can effectively reduce the flow resistance of the heat exchange medium, thereby reducing the inlet pressure of the heat exchange medium, improving the uniformity of the heat exchange medium distribution, and enhancing the heat exchange efficiency, thereby achieving stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a plate heat exchanger provided in an embodiment of the present utility model;

[0020] Figure 2 A cross-sectional view of a plate heat exchanger provided in an embodiment of the present utility model;

[0021] Figure 3 for Figure 2 A partial enlarged view of middle III;

[0022] Figure 4 This is an exploded view of a plate heat exchanger provided in an embodiment of the present invention.

[0023] Icons: 100-plate heat exchanger; 110-first plate; 111-first main body; 112-rib; 113-first raised portion; 114-first through-hole; 115-second through-hole; 116-arc-shaped notch; 120-second plate; 121-second main body; 122-rib; 123-second raised portion; 124-third through-hole; 125-fourth through-hole; 130-first heat exchange channel; 131-main channel; 132-side channel; 140-second heat exchange channel; DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0030] Please refer to Figures 1 to 4 The present invention provides a plate heat exchanger 100 for heat exchange. The plate heat exchanger 100 can effectively reduce the flow resistance of the heat exchange medium, thereby reducing the heat exchange medium inlet pressure, improving the uniformity of the heat exchange medium distribution, and improving the heat exchange efficiency, thereby being stable and reliable.

[0031] The plate heat exchanger 100 comprises a plurality of first plates 110 and a plurality of second plates 120. The plurality of first plates 110 and the plurality of second plates 120 are sequentially and superimposedly arranged, a first heat exchange flow channel 130 is formed between the first plate 110 and the adjacent second plate 120, and a second heat exchange flow channel 140 is formed between the first plate 110 and the adjacent second plate 120, that is, the plurality of first plates 110 and the plurality of second plates 120 jointly form a plurality of first heat exchange flow channels 130 and a plurality of second heat exchange flow channels 140, the plurality of first heat exchange flow channels 130 and the plurality of second heat exchange flow channels 140 are sequentially and alternately arranged, wherein the plurality of first heat exchange flow channels 130 are sequentially communicated, and the plurality of first heat exchange flow channels 130 are all used for circulating heat exchange medium, the plurality of second heat exchange flow channels 140 are sequentially communicated, and the plurality of second heat exchange flow channels 140 are all used for circulating heat exchange fluid, the heat exchange medium is used for exchanging heat with the heat exchange fluid through the first plate 110 and the second plate 120, so as to realize the heat exchange function of the plate heat exchanger 100.

[0032] Further, the first heat exchange flow channel 130 comprises a main flow channel 131 and two side flow channels 132. The heat exchange medium in the main flow channel 131 can exchange heat with the heat exchange fluid in the second heat exchange flow channel 140 through the first plate 110 and the second plate 120. The two side flow channels 132 are oppositely arranged on both sides of the main flow channel 131 and are communicated with the main flow channel 131, that is, the side flow channel 132 is close to the end of the plate heat exchanger 100 relative to the main flow channel 131, the cross-sectional height of the side flow channel 132 is greater than the cross-sectional height of the main flow channel 131, the cross-sectional height is the distance between the first plate 110 and the second plate 120, so that the entire first heat exchange flow channel 130 has a certain height staggered distribution, so that the flow rate of the heat exchange medium in the side flow channel 132 is greater than the flow rate of the heat exchange medium in the main flow channel 131, and the heat exchange medium in the side flow channel 132 has a tendency to flow towards the main flow channel 131, so as to reduce the flow resistance of the heat exchange medium in the main flow channel 131, thereby reducing the inlet pressure of the heat exchange medium, improving the uniformity of the distribution of the heat exchange medium, and improving the heat exchange efficiency and stability. Specifically, the two side flow channels 132 jointly act to increase the height staggered distribution degree of the first heat exchange flow channel 130, further reduce the flow resistance of the heat exchange medium in the main flow channel 131, improve the uniformity of the distribution of the heat exchange medium, and improve the heat exchange efficiency.

[0033] Preferably, the area of the main flow channel 131 is equal to the area of the second heat exchange flow channel 140, so as to facilitate production and processing, and ensure the heat exchange efficiency.

[0034] The first plate 110 includes a first main body 111, a rib 112, and two first protrusions 113. The two first protrusions 113 are arranged at opposite ends of the first main body 111 and are both connected to the first main body 111. The first protrusions 113 protrude upward relative to the first main body 111. Specifically, the first protrusion 113 is spaced apart from an adjacent second plate 120 to form a side flow channel 132, and the first main body 111 is spaced apart from the second plate 120 to form a main flow channel 131; the first protrusion 113 abuts against another adjacent second plate 120, and the first main body 111 is spaced apart from the second plate 120 to form a second heat exchange flow channel 140.

[0035] Furthermore, the rib portion 112 is disposed around the first main portion 111 and the two first protrusions 113 to prevent the heat exchange fluid from overflowing. In this embodiment, the first main portion 111, the rib portion 112 and the two first protrusions 113 are integrally formed to improve connection strength.

[0036] In this embodiment, the first main body portion 111 defines two first through holes 114, which are used to connect two adjacent second heat exchange channels 140, so that the fluid to be heat exchanged can flow to different second heat exchange channels 140 through the first through holes 114, thereby ensuring heat exchange efficiency. Each first raised portion 113 defines a second through hole 115, which is used to connect two adjacent first heat exchange channels 130, so that the heat exchange medium can flow through the second through hole 115 to the side channels 132 in different first heat exchange channels 130, and then flow to the main channels 131 in different first heat exchange channels 130, thereby ensuring heat exchange efficiency.

[0037] Furthermore, the first protrusion 113 is provided with an arc-shaped notch 116 , the position of which corresponds to the position of the first through hole 114 . The arc-shaped notch 116 is used to make way for the first through hole 114 so that the heat exchange fluid can flow through the first through hole 114 to different second heat exchange channels 140 .

[0038] Preferably, the first through hole 114 and the second through hole 115 are both circular, and the area of ​​the first through hole 114 is equal to the area of ​​the second through hole 115 to ensure that the flow rates of the heat exchange medium and the fluid to be heat exchanged in the plate heat exchanger 100 are the same, thereby improving the heat exchange efficiency and ensuring the heat exchange effect.

[0039] Preferably, the two first through holes 114 and the two second through holes 115 are distributed in a rectangular array, wherein one first through hole 114 is used to realize the inlet of the fluid to be heat exchanged, the other first through hole 114 is used to realize the outlet of the fluid to be heat exchanged, one second through hole 115 is used to realize the inlet of the heat exchange medium, and the other second through hole 115 is used to realize the outlet of the heat exchange medium.

[0040] The second plate 120 includes a second main body 121, a peripheral edge 122, and two second protrusions 123. The two second protrusions 123 are spaced apart and are both connected to the second main body 121. The second protrusions 123 protrude upward relative to the second main body 121. Specifically, the second protrusions 123 abut against the first main body 111 of an adjacent first plate 110, and the second main body 121 is spaced apart from the first main body 111 to form a first heat exchange channel 130. The first heat exchange channel 130 is disposed outside the second protrusions 123; the second protrusions 123 are spaced apart from the first main body 111 of another adjacent first plate 110, and the second main body 121 is spaced apart from the first main body 111 to form a second heat exchange channel 140.

[0041] Furthermore, the edge portion 122 is disposed outside the second main body portion 121 to prevent the heat exchange medium from overflowing. In this embodiment, the second main body portion 121 and the two second protrusions 123 of the edge portion 122 are integrally formed to improve the connection strength.

[0042] Furthermore, the surrounding edge portion 122 is fitted and seal-welded with the retaining edge portion 112 to ensure the connection strength between the first plate 110 and the second plate 120 , while ensuring the sealing of the first heat exchange channel 130 and the second heat exchange channel 140 , thereby improving the reliability of the plate heat exchanger 100 .

[0043] In this embodiment, the second main body portion 121 defines two third through holes 124, each of which communicates with a second through hole 115, thereby connecting two adjacent first heat exchange channels 130. Each second protrusion portion 123 defines a fourth through hole 125, each of which communicates with a first through hole 114, thereby connecting two adjacent second heat exchange channels 140.

[0044] In this embodiment, both the first main body 111 and the second main body 121 are planar, and no fins are provided between the first main body 111 and the second main body 121. However, this is not the only embodiment. In another embodiment, the plate heat exchanger 100 further includes fins, which are disposed within the main channel 131, i.e., between the two first protrusions 113. The fins are used to improve heat exchange efficiency. The fins can be welded to both first protrusions 113 simultaneously, or can be abutted against both first protrusions 113 simultaneously. The fins can also be welded between adjacent first plates 110 and second plates 120. The method of securing the fins is not specifically limited. In another embodiment, the first main body 111 and / or the second main body 121 can be provided with protrusions, so that the first main body 111 and / or the second main body 121 form a herringbone plate structure or a point wave plate structure, thereby improving heat exchange efficiency. In this case, fins can be provided between the first main body 111 and the second main body 121, or not.

[0045] The plate heat exchanger 100 provided in an embodiment of the present invention comprises a plurality of first plates 110 and a plurality of second plates 120 arranged in an overlapping manner. A first heat exchange channel 130 is formed between a first plate 110 and an adjacent second plate 120, and a second heat exchange channel 140 is formed between a first plate 110 and another adjacent second plate 120. The first heat exchange channel 130 comprises a main channel 131 and two side channels 132. The two side channels 132 are arranged on opposite sides of the main channel 131 and are both connected to the main channel 131. The cross-sectional height of the side channels 132 is greater than that of the main channel 131. Compared with the prior art, the plate heat exchanger 100 provided by the present invention, due to the use of side channels 132 having a cross-sectional height greater than that of the main channel 131, can effectively reduce the flow resistance of the heat exchange medium, thereby reducing the inlet pressure of the heat exchange medium, improving the uniformity of the heat exchange medium distribution, and enhancing the heat exchange efficiency and stability.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A plate heat exchanger, characterized in that: It includes multiple first plates and multiple second plates, and the multiple first plates and the multiple second plates are arranged in sequence overlapping, and a first heat exchange channel is formed between the first plate and an adjacent second plate, and a second heat exchange channel is formed between the first plate and another adjacent second plate, wherein the first heat exchange channel includes a main channel and two side channels, and the two side channels are relatively arranged on both sides of the main channel and are both connected to the main channel, and the cross-sectional height of the side channels is greater than the cross-sectional height of the main channel.

2. The plate heat exchanger according to claim 1, characterized in that The area of ​​the main flow channel is equal to the area of ​​the heat exchange flow channel.

3. The plate heat exchanger according to claim 1, characterized in that The first plate includes a first main body and two first protrusions, the two first protrusions are relatively arranged at the two ends of the first main body and are both connected to the first main body, the first protrusion is spaced apart from an adjacent second plate to form the side flow channel, and the first protrusion is abutted against another adjacent second plate.

4. The plate heat exchanger according to claim 3, characterized in that The first main body is provided with two first through holes, and each first protrusion is provided with a second through hole. The first through holes are used to connect two adjacent second heat exchange channels, and the second through holes are used to connect two adjacent first heat exchange channels.

5. The plate heat exchanger according to claim 4, characterized in that The first protrusion is provided with an arc-shaped notch, and the position of the arc-shaped notch corresponds to the position of the first through hole.

6. The plate heat exchanger according to claim 4, characterized in that The area of ​​the first through hole is equal to the area of ​​the second through hole, and / or the two first through holes and the two second through holes are distributed in a rectangular array.

7. The plate heat exchanger according to claim 4, characterized in that The second plate includes a second main body and two second protrusions, the two second protrusions are arranged at intervals and are both connected to the second main body, the second protrusion is abutted against the first main body of an adjacent first plate, and is arranged at intervals from the first main body of another adjacent first plate, and the first heat exchange channel is arranged outside the second protrusion.

8. The plate heat exchanger according to claim 7, characterized in that The second main body is provided with two third through holes, each of the second protrusions is provided with a fourth through hole, each of the third through holes is communicated with one of the second through holes, and each of the fourth through holes is communicated with one of the first through holes.

9. The plate heat exchanger according to claim 7, characterized in that The second plate also includes a surrounding edge portion, which is arranged outside the second main body portion; the first plate also includes a retaining edge portion, which is simultaneously arranged outside the first main body portion and the two first protrusions; the surrounding edge portion is fitted with the retaining edge portion and is seal-welded.

10. The plate heat exchanger according to any one of claims 1 to 9, characterized in that: The plate heat exchanger further includes fins, which are arranged in the main flow channel.

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