Plate of a plate heat exchanger

Abstract

A plate for a plate-type heat exchanger includes a plate body, a first water inlet hole provided at the upper left corner of the plate body, a first water outlet hole provided at the lower left corner, one or more raised portions provided at the bottom of the first water inlet hole, and the normal pitch between any adjacent first wave crests and first wave troughs being smaller than the normal pitch between any adjacent second wave crests and second wave troughs. Two recessed portions are provided at the bottom of the first water inlet hole, thereby increasing the cross-sectional area of ​​the fluid channel and increasing the processing capacity by 30% compared to similar heat exchangers. The normal pitch between any adjacent first wave crests and first wave troughs is larger than the normal pitch between any adjacent second wave crests and second wave troughs, so that the pressure drop generated by the first corrugation is greater than the pressure drop generated by the second corrugation. Based on the zoned pressure difference design, the fluid flows more to the flow channel formed by the second corrugation with smaller density, so that the flow in the flow channel on the right side of the plate surface is balanced with the flow channel on the left side of the plate surface.

Description

Technical Field

[0001] The present invention relates to the field of physics, in particular to a plate heat exchanger, and in particular to a plate of a plate heat exchanger. Background Art

[0002] Traditional plate heat exchangers feature circular holes in their plates. Due to the plate heat exchanger's unique structure, a significant portion of the fluid flow enters the heat exchange area from the lower half of the circular cross-section, significantly impacting the fluid flow resistance. Furthermore, fluid typically flows unilaterally, for example, from the upper left corner to the lower left corner. Because the corner holes are located on the same edge, this can easily lead to fluid flow deviation, where the flow rate in the left half of the channel exceeds that in the right half. This deviation can result in decreased heat transfer performance, excessive localized fluid resistance, and inefficient plate operation. Summary of the Invention

[0003] The object of the present invention is to provide a plate for a plate heat exchanger, which is intended to solve the technical problems in the prior art of large fluid flow resistance and easy occurrence of flow deviation.

[0004] A plate of a plate heat exchanger of the present invention comprises a plate body, wherein a first water inlet is provided at the upper left corner of the plate body, a first water outlet is provided at the lower left corner, a second water inlet is provided at the lower right corner, and a second water outlet is provided at the upper right corner, the cross-sectional shape of the first water outlet is symmetrical with the cross-sectional shape of the first water inlet, the cross-sectional shape of the second water inlet is symmetrical with the cross-sectional shape of the first water outlet, the cross-sectional shape of the second water outlet is symmetrical with the cross-sectional shape of the second water inlet, and the bottom of the first water inlet is provided with one or more protrusions, and the one or more protrusions are provided. The bottom of the first water inlet hole is formed with two or more recessed portions, the bottom surface of the recessed portions is a curved surface, a plurality of first corrugations are arranged at intervals along the length direction of the left portion of the side surface of the plate body, a plurality of second corrugations are arranged at intervals along the length direction of the right portion of the side surface of the plate body, the first corrugations include a plurality of first wave peaks and a plurality of first wave valleys, the second corrugations include a plurality of second wave peaks and a plurality of second wave valleys, and the normal pitch between any adjacent first wave peaks and a first wave valley is smaller than the normal pitch between any adjacent second wave peaks and a second wave valley.

[0005] Furthermore, the edge of the cross-sectional shape of the first water inlet hole includes a first curved edge, a second curved edge, a third curved edge, and a fourth curved edge. The first curved edge is the upper edge of the cross-sectional shape of the first water inlet hole, and the second curved edge, the third curved edge, and the fourth curved edge are the lower edges of the cross-sectional shape of the first water inlet hole. The first end of the first curved edge is connected to the first end of the second curved edge, the second end of the second curved edge is connected to the first end of the third curved edge, the second end of the third curved edge is connected to the first end of the fourth curved edge, and the second end of the fourth curved edge is connected to the first end of the first curved edge. The third curved edge is provided with more than one curved section along its extension direction, and the curved sections are all curved upward.

[0006] Furthermore, the first corrugations and the second corrugations are herringbone corrugations, oblique straight corrugations or sinusoidal corrugations.

[0007] Furthermore, the longitudinal distance between any adjacent first wave crests and first wave troughs is smaller than the longitudinal distance between any adjacent second wave crests and second wave troughs.

[0008] Compared with the prior art, the present invention has a positive and obvious effect. Two recessed portions are provided at the bottom of the first water inlet of this embodiment of the present invention, which increases the fluid channel. Under the same working conditions, the processing capacity is increased by 30% compared with the same type of heat exchanger, and the flow rate permeability is increased by more than 30%. Since the normal pitch between any adjacent first wave crests and first wave troughs is greater than the normal pitch between any adjacent second wave crests and second wave troughs, the pressure drop generated by the first corrugation is greater than the pressure drop generated by the second corrugation. Therefore, the flow channel composed of the second corrugation with more fluid flow density and smaller pressure drop balances the flow of the right flow channel and the left flow channel, thereby effectively preventing the influence of uneven distribution of fluid on heat transfer performance and reducing the footprint of the whole machine. The plate has the advantages of special structure, energy saving and high efficiency, performance surpassing plates of the same level, and suitability for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of a plate of a plate heat exchanger of the present invention.

[0010] Figure 2 The figure is a schematic diagram of the cross-sectional shape of a first water inlet hole in a plate of a plate heat exchanger of the present invention. DETAILED DESCRIPTION

[0011] The present invention is further described below with reference to the accompanying drawings and embodiments. However, the present invention is not limited to these embodiments. Any similar structure and similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for convenience of description and does not limit the technical solutions of the present invention.

[0012] Example 1

[0013] like Figure 1 and Figure 2 As shown, a plate of a plate heat exchanger of the present invention includes a plate body 1, a first water inlet 2 is provided at the upper left corner of the plate body 1, a first water outlet 3 is provided at the lower left corner, a second water inlet 4 is provided at the lower right corner, and a second water outlet 5 is provided at the upper right corner. The cross-sectional shape of the first water outlet 3 is symmetrical with the cross-sectional shape of the first water inlet 2, the cross-sectional shape of the second water inlet 4 is symmetrical with the cross-sectional shape of the first water outlet 3, and the cross-sectional shape of the second water outlet 5 is symmetrical with the cross-sectional shape of the second water inlet 4. The bottom of the first water inlet 2 is provided with one or more protrusions 6, and the protrusions 6 form the bottom of the first water inlet 2. There are more than two recessed portions 7, the bottom surface of the recessed portions 7 is a curved surface, a plurality of first corrugations 8 are arranged at intervals along the length direction on the left portion of the side surface of the plate body 1, a plurality of second corrugations 9 are arranged at intervals along the length direction on the right portion of the side surface of the plate body 1, the first corrugations 8 include a plurality of first wave crests 10 and a plurality of first wave troughs 11, the second corrugations 9 include a plurality of second wave crests 12 and a plurality of second wave troughs 13, and the normal pitch (lateral distance) between any adjacent first wave crest 10 and a first wave trough 11 is smaller than the normal pitch (lateral distance) between any adjacent second wave crest 12 and a second wave trough 13.

[0014] Furthermore, the edges of the cross-sectional shape of the first water inlet hole 2 include a first curved edge 14, a second curved edge 15, a third curved edge 16, and a fourth curved edge 17. The first curved edge 14 is the upper edge of the cross-sectional shape of the first water inlet hole 2, and the second curved edge 15, the third curved edge 16, and the fourth curved edge 17 are the lower edge of the cross-sectional shape of the first water inlet hole 2. The first end of the first curved edge 14 is connected to the first end of the second curved edge 15, the second end of the second curved edge 15 is connected to the first end of the third curved edge 16, the second end of the third curved edge 16 is connected to the first end of the fourth curved edge 17, and the second end of the fourth curved edge 17 is connected to the first end of the first curved edge 14. The third curved edge 16 is provided with more than one curved section along its extension direction, and the curved sections are all curved upward.

[0015] Furthermore, the first corrugations 8 and the second corrugations 9 are herringbone corrugations, oblique straight corrugations or sinusoidal corrugations.

[0016] Furthermore, the longitudinal distance between any adjacent first wave crests 10 and first wave valleys 11 is smaller than the longitudinal distance between any adjacent second wave crests 12 and second wave valleys 13 .

[0017] Specifically, the plate body 1, herringbone corrugations, water corrugations, sinusoidal corrugations, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0018] The working principle of this embodiment is as follows:

[0019] The bottom of the first water inlet 2 of this embodiment is provided with two recessed portions 7, which increases the cross-sectional area of ​​the fluid channel. Therefore, under the same working conditions, the processing capacity is increased by 30% compared to the same type of heat exchanger, and the flow rate permeability is increased by more than 30%. Since the normal pitch between any adjacent first wave crests 10 and first wave troughs 11 is greater than the lateral distance between any adjacent second wave crests 12 and second wave troughs 13, the pressure drop generated by the first corrugation 8 is greater than the pressure drop generated by the second corrugation 9. According to the zoned pressure difference design, the flow channel formed by the second corrugation 9 with higher flow density and smaller pressure drop balances the flow of the flow channel on the right side of the plate surface with the flow channel on the left side of the plate surface, thereby effectively preventing the impact of uneven distribution of the fluid on the heat transfer performance and reducing the footprint of the entire machine. This plate has the advantages of special structure, energy saving and high efficiency, performance exceeding that of plates of the same level, and suitability for promotion.

Claims

1. A plate for a plate heat exchanger, characterized in that: The plate body (1) comprises a first water inlet (2) provided at the upper left corner of the plate body (1), a first water outlet (3) provided at the lower left corner, a second water inlet (4) provided at the lower right corner, and a second water outlet (5) provided at the upper right corner. The cross-sectional shape of the first water outlet (3) is symmetrical with the cross-sectional shape of the first water inlet (2) in the vertical direction, the cross-sectional shape of the second water inlet (4) is symmetrical with the cross-sectional shape of the first water outlet (3) in the left and right directions, and the cross-sectional shape of the second water outlet (5) is symmetrical with the cross-sectional shape of the second water inlet (4) in the vertical direction. The bottom of the first water inlet (2) is provided with one or more protrusions (6), and the protrusions (6) form two protrusions at the bottom of the first water inlet (2). The lower concave portion (7) is provided with a plurality of first corrugations (8) at intervals along the length direction of the left side of the plate body (1), and the right side of the plate body (1) is provided with a plurality of second corrugations (9) at intervals along the length direction of the plate body (1), the first corrugations (8) include a plurality of first wave crests (10) and a plurality of first wave troughs (11), the second corrugations (9) include a plurality of second wave crests (12) and a plurality of second wave troughs (13), and the normal pitch between any adjacent first wave crests (10) and a first wave trough (11) is smaller than the normal pitch between any adjacent second wave crests (12) and a second wave trough (13); The edges of the cross-sectional shape of the first water inlet hole (2) include a first curved edge (14), a second curved edge (15), a third curved edge (16), and a fourth curved edge (17); the first curved edge (14) is the upper edge of the cross-sectional shape of the first water inlet hole (2); the second curved edge (15), the third curved edge (16), and the fourth curved edge (17) are the lower edges of the cross-sectional shape of the first water inlet hole (2); the first end of the first curved edge (14) is connected to the first end of the second curved edge (15); the second end of the second curved edge (15) is connected to the first end of the third curved edge (16); the second end of the third curved edge (16) is connected to the first end of the fourth curved edge (17); the second end of the fourth curved edge (17) is connected to the first end of the first curved edge (14); and the third curved edge (16) is provided with more than one curved section along its extension direction, and the curved sections are all curved upward.

2. The plate of a plate heat exchanger according to claim 1, characterized in that: The first corrugation (8) and the second corrugation (9) are herringbone corrugations, oblique straight corrugations or sinusoidal corrugations.

3. The plate of a plate heat exchanger according to claim 1, characterized in that: The longitudinal distance between any adjacent first wave crests (10) and first wave valleys (11) is smaller than the longitudinal distance between any adjacent second wave crests (12) and second wave valleys (13).

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