CN219934739U - Plate heat exchanger - Google Patents

Abstract

The utility model discloses a plate heat exchanger. The plate heat exchanger includes a first heat transfer plate and a second heat transfer plate stacked on the first heat transfer plate in a stacking direction. The first heat transfer plate includes a plurality of projections protruding upward, the projections of the first heat transfer plate have tops, and the plurality of projections of the first heat transfer plate include a plurality of void-forming projections. The second heat transfer plate includes a plurality of concave portions recessed downward, the concave portions of the second heat transfer plate have bottoms, and the plurality of concave portions of the second heat transfer plate include a plurality of void-forming concave portions. The tops of the plurality of void-forming projections of the first heat transfer plate and the bottoms of the plurality of void-forming recesses of the second heat transfer plate face each other in the stacking direction and are spaced apart by a predetermined void, respectively. Thereby, the heat exchanging performance of the plate heat exchanger can be improved.

Description

Plate heat exchanger

Technical Field

Embodiments of the present utility model relate to a plate heat exchanger.

Background

In a conventional plate heat exchanger, the top of a protrusion of one of two adjacent heat transfer plates and the bottom of a corresponding recess of the other heat transfer plate are welded together. Thereby, channels may be formed between two adjacent heat transfer plates.

Disclosure of Invention

It is an object of embodiments of the present utility model to provide a plate heat exchanger, whereby the heat exchanging performance of the plate heat exchanger is improved.

According to an embodiment of the present utility model, there is provided a plate heat exchanger including: a first heat transfer plate, the first heat transfer plate comprising: a plurality of projections protruding upward, the projections of the first heat transfer plate having a top, and the plurality of projections of the first heat transfer plate including a plurality of void-forming projections; and a second heat transfer plate stacked on the first heat transfer plate in the stacking direction, the second heat transfer plate including a plurality of concave portions recessed downward, the concave portions of the second heat transfer plate having bottoms, and the plurality of concave portions of the second heat transfer plate including a plurality of void-forming concave portions, wherein tops of the plurality of void-forming convex portions of the first heat transfer plate and bottoms of the plurality of void-forming concave portions of the second heat transfer plate respectively face each other in the stacking direction and are spaced apart by a predetermined void.

According to an embodiment of the utility model, the plurality of protrusions of the first heat transfer plate further comprises a plurality of non-void-forming protrusions, the plurality of recesses of the second heat transfer plate further comprises a plurality of non-void-forming recesses, and tops of the plurality of non-void-forming protrusions of the first heat transfer plate face each other and are connected to bottoms of the plurality of non-void-forming recesses of the second heat transfer plate, respectively.

According to an embodiment of the utility model, the top of the void-forming projections of the first heat transfer plate protrudes upwards by the same, smaller or larger distance than the top of the non-void-forming projections of the first heat transfer plate.

According to an embodiment of the utility model, the bottom of the void-forming recess of the second heat transfer plate is recessed downwards by the same, smaller or larger distance than the bottom of the non-void-forming recess of the second heat transfer plate.

According to an embodiment of the utility model, a height difference between at least one of the plurality of void-forming projections of the first heat transfer plate or at least one row of the projections and a top of the non-void-forming projections of the first heat transfer plate, and a height difference between a bottom of the plurality of void-forming recesses of the second heat transfer plate, which corresponds to the at least one of the at least one row of the projections of the first heat transfer plate, and a bottom of the non-void-forming recesses of the second heat transfer plate, are the same or different.

According to an embodiment of the utility model, at least one of the plurality of void-forming projections of the first heat transfer plate or at least one row protrudes upwards by the same or different distance as at least another of the plurality of void-forming projections of the first heat transfer plate or at least another row.

According to an embodiment of the utility model, at least one of the bottoms of the plurality of void-forming recesses of the second heat transfer plate or at least one row is recessed downwards by the same or different distance as at least another of the bottoms of the plurality of void-forming recesses of the second heat transfer plate or at least another row.

According to an embodiment of the utility model, the plurality of void-forming projections of the first heat transfer plate and the plurality of void-forming recesses of the second heat transfer plate are located in at least a partial area of the heat transfer area of the plate heat exchanger and/or around at least a partial area of the port area of the inlet port.

According to an embodiment of the utility model, the plate heat exchanger comprises a plurality of the first heat transfer plates and a plurality of the second heat transfer plates, the plurality of the first heat transfer plates and the plurality of the second heat transfer plates being alternately arranged.

According to an embodiment of the utility model, the predetermined clearance is 10% to 50% of the maximum height of the channel formed between the first heat transfer plate and the second heat transfer plate.

According to an embodiment of the utility model, the predetermined clearance is in the range of 0.1mm to 0.5 mm.

According to an embodiment of the utility model, the first heat transfer plate further comprises: a plurality of concave portions recessed downward, the concave portions of the first heat transfer plate having a bottom, and the plurality of concave portions of the first heat transfer plate including a plurality of void-forming concave portions; the plate heat exchanger further comprises: a third heat transfer plate on which the first heat transfer plate is stacked, the third heat transfer plate including: a plurality of projections protruding upward, the projections of the third heat transfer plate having a top, and the plurality of projections of the third heat transfer plate including a plurality of void-forming projections; and top portions of the plurality of void-forming projections of the third heat transfer plate and bottom portions of the plurality of void-forming recesses of the first heat transfer plate respectively face each other in the stacking direction and are spaced apart by a predetermined void.

According to an embodiment of the utility model, the plurality of protrusions of the third heat transfer plate further comprises a plurality of non-void-forming protrusions, the plurality of recesses of the first heat transfer plate further comprises a plurality of non-void-forming recesses, and tops of the plurality of non-void-forming protrusions of the third heat transfer plate face each other and are connected to bottoms of the plurality of non-void-forming recesses of the first heat transfer plate, respectively.

According to an embodiment of the utility model, the bottom of the void-forming recess of the first heat transfer plate is recessed downwards by the same, smaller or larger distance than the bottom of the non-void-forming recess of the first heat transfer plate.

According to an embodiment of the utility model, the top of the void-forming projections of the third heat transfer plate protrudes upwards by the same, smaller or larger distance than the top of the non-void-forming projections of the third heat transfer plate.

According to an embodiment of the utility model, a height difference between at least one of the plurality of void-forming recesses of the first heat transfer plate or at least one row of the bottoms and a bottom of the non-void-forming recess of the first heat transfer plate, and a height difference between a top of the plurality of void-forming projections of the third heat transfer plate, which corresponds to the at least one of the at least one row of bottoms of the first heat transfer plate, and a top of the non-void-forming projections of the third heat transfer plate, are the same or different.

According to an embodiment of the utility model, at least one of the bottoms of the plurality of void-forming recesses of the first heat transfer plate or at least one row is recessed downwards by the same or different distance as at least another of the bottoms of the plurality of void-forming recesses of the first heat transfer plate or at least another row.

According to an embodiment of the utility model, at least one of the plurality of void-forming projections of the third heat transfer plate or at least one row protrudes upwards by the same or different distance as at least another of the plurality of void-forming projections of the third heat transfer plate or at least another row.

According to an embodiment of the utility model, the plurality of void-forming projections of the third heat transfer plate and the plurality of void-forming recesses of the first heat transfer plate are located in at least a partial area of the heat transfer area of the plate heat exchanger and/or around at least a partial area of the port area of the inlet port.

According to an embodiment of the utility model, the second heat transfer plate and the third heat transfer plate are the same heat transfer plate.

According to an embodiment of the utility model, the first heat transfer plate further comprises: a plurality of concave portions recessed downward, the concave portions of the first heat transfer plate having a bottom, and the plurality of concave portions of the first heat transfer plate including a plurality of non-void forming concave portions; the plate heat exchanger further comprises: a third heat transfer plate on which the first heat transfer plate is stacked, the third heat transfer plate including: a plurality of projections protruding upward, the projections of the third heat transfer plate having a top, and the plurality of projections of the third heat transfer plate including a plurality of non-void forming projections; and top portions of the plurality of non-void-forming projections of the third heat transfer plate and bottom portions of the plurality of non-void-forming recesses of the first heat transfer plate respectively face and are connected to each other in the stacking direction.

According to an embodiment of the utility model, the second heat transfer plate and the third heat transfer plate are the same heat transfer plate.

According to an embodiment of the utility model, the plurality of recesses of the first heat transfer plate are all non-void forming recesses; the plurality of projections of the third heat transfer plate are non-void forming projections.

According to an embodiment of the utility model, at least one or at least one row of the plurality of void-forming projections of the first heat transfer plate has a concave portion that is recessed downward and within a top portion of the at least one or at least one row of the plurality of void-forming projections of the first heat transfer plate when viewed in the stacking direction.

According to an embodiment of the utility model, the top of the protrusions of the first heat transfer plate and the bottom of the recesses of the second heat transfer plate are flat.

According to an embodiment of the utility model, the bottom of the recess of the first heat transfer plate and the top of the protrusion of the third heat transfer plate are flat.

According to an embodiment of the utility model, the second heat transfer plate further comprises: and a plurality of protruding portions protruding upward, the protruding portions of the second heat transfer plate having a top portion, the top portion of the protruding portions of the second heat transfer plate being flat.

According to an embodiment of the utility model, the plurality of void-forming projections of the first heat transfer plate comprises a plurality of void-forming projection groups, each void-forming projection group comprising at least one empty void-forming projection of the first heat transfer plate; the plurality of non-void-forming projections of the first heat transfer plate includes a plurality of non-void-forming projection groups, each non-void-forming projection group including at least one row of non-void-forming projections of the first heat transfer plate; and the plurality of void-forming protrusion groups and the plurality of non-void-forming protrusion groups are alternately arranged.

According to an embodiment of the present utility model, the number of rows of the void-forming projections of the plurality of void-forming projection groups is the same or different; and/or the number of rows of non-void forming projections of the plurality of non-void forming projection sets is the same or different.

According to an embodiment of the present utility model, the number of rows of void-forming projections of at least one void-forming projection group is the same as or different from the number of rows of non-void-forming projections of at least one non-void-forming projection group.

In the plate heat exchanger according to an embodiment of the present utility model, the heat exchanging performance of the plate heat exchanger is improved by the top portions of the plurality of void-forming projections of the first heat transfer plate being spaced apart from the bottom portions of the plurality of void-forming recesses of the second heat transfer plate, respectively, by predetermined voids.

Drawings

Fig. 1 is a schematic perspective view of a plate heat exchanger according to an embodiment of the utility model;

fig. 2 is a schematic perspective view of a heat transfer plate of the plate heat exchanger shown in fig. 1;

fig. 3 is a schematic top view of a heat transfer plate of a plate heat exchanger according to an embodiment of the utility model, wherein the heat exchange area and the port area of the plate heat exchanger are shown in hatched lines.

Fig. 4 is a schematic top view of a heat transfer plate of a plate heat exchanger according to an embodiment of the utility model, wherein the port area of the plate heat exchanger surrounding the inlet port is shown in hatched lines.

Fig. 5 is a schematic enlarged partial cross-sectional view of adjacent heat transfer plates of a plate heat exchanger according to an embodiment of the utility model;

fig. 6 is a schematic enlarged partial cross-sectional view of adjacent heat transfer plates of a plate heat exchanger according to another embodiment of the utility model;

fig. 7 is a schematic enlarged partial cross-sectional view of an adjacent heat transfer plate of a plate heat exchanger according to a further embodiment of the utility model;

fig. 8 is a schematic enlarged partial cross-sectional view of adjacent heat transfer plates of a plate heat exchanger according to a variant of the embodiment shown in fig. 6;

fig. 9 is a schematic enlarged partial cross-sectional view of adjacent heat transfer plates of a plate heat exchanger according to another variant of the embodiment shown in fig. 6;

Fig. 10 is a schematic partial enlarged perspective view of a heat transfer plate of a plate heat exchanger according to an embodiment of the utility model

FIG. 11 is a schematic partial enlarged top view of a heat transfer plate of the plate heat exchanger shown in FIG. 10; and

fig. 12 is a schematic partial enlarged front view of two adjacent heat transfer plates of a plate heat exchanger according to an embodiment of the utility model.

Detailed Description

The utility model is further described with reference to the drawings and detailed description.

Referring to fig. 1, a plate heat exchanger 100 according to an embodiment of the utility model comprises a plurality of heat transfer plates 10; channels 101 (see fig. 5 to 9, 12) formed between adjacent heat transfer plates 10 of the plurality of heat transfer plates 10; and ports formed in the heat transfer plate 10. The openings 11 (fig. 2 to 4) of the plurality of heat transfer plates 10 constitute the port. In fig. 1 is shown a nipple 102 connected to a port in a heat transfer plate 10. As shown in fig. 3, 4, the heat transfer plate 10 or the heat exchanger 100 comprises a heat exchange area 21 for heat exchange of a heat exchange medium and a port area 22 surrounding the opening or surrounding the inlet port and the outlet port. The channels 101 comprise channels for circulating a refrigerant and channels for circulating a coolant, the channels for circulating a refrigerant and the channels for circulating a coolant being alternately arranged to exchange heat with each other.

As shown in fig. 5 to 12, the plurality of heat transfer plates 10 includes: a first heat transfer plate 10A; and a second heat transfer plate 10B stacked on the first heat transfer plate 10A in the stacking direction. The first heat transfer plate 10A includes: a plurality of projections 5 projecting upward, the projections 5 of the first heat transfer plate 10A having a top 51, and the plurality of projections 5 of the first heat transfer plate 10A including a plurality of void-forming projections 5G. The second heat transfer plate 10B includes a plurality of concave portions 6 recessed downward, the concave portions 6 of the second heat transfer plate 10B have bottoms 61, and the plurality of concave portions 6 of the second heat transfer plate 10B include a plurality of void-forming concave portions 6G. The top portions 51 of the plurality of void-forming projections 5G of the first heat transfer plate 10A face each other in the stacking direction with the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, respectively, and are spaced apart by predetermined voids G, G, G2. The top portions 51 of the plurality of void-forming projections 5G of the first heat transfer plate 10A and the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, respectively, are not welded together. For example, the heat exchange medium may flow through a predetermined gap. The projections of the top portions 51 of the plurality of void-forming projections 5G of the first heat transfer plate 10A on a plane perpendicular to the stacking direction may substantially coincide with the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B on a plane perpendicular to the stacking direction, respectively, or the projections of the top portions 51 of the plurality of void-forming projections 5G of the first heat transfer plate 10A on a plane perpendicular to the stacking direction may be located within the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B on a plane perpendicular to the stacking direction, respectively, or the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B on a plane perpendicular to the stacking direction may be located within the projections of the top portions 51 of the plurality of void-forming projections 5G of the first heat transfer plate 10A, respectively. The plurality of projections 5 of the first heat transfer plate 10A further includes a plurality of non-void forming projections 5N, the plurality of recesses 6 of the second heat transfer plate 10B further includes a plurality of non-void forming recesses 6N, and the top portions 51 of the plurality of non-void forming projections 5N of the first heat transfer plate 10A face each other and are connected to the bottom portions 61 of the plurality of non-void forming recesses 6N of the second heat transfer plate 10B, respectively. For example, the top portions 51 of the plurality of non-void forming projections 5N of the first heat transfer plate 10A and the bottom portions 61 of the plurality of non-void forming recesses 6N of the second heat transfer plate 10B are welded to each other by brazing filler metal, respectively.

Note that each of the plurality of heat transfer plates 10 includes a plurality of convex portions 5 having a top 51 and a plurality of concave portions 6 having a bottom 61, the plurality of convex portions 5 includes a plurality of non-void-forming convex portions 5N and may further include a plurality of void-forming convex portions 5G, and the plurality of concave portions 6 includes a plurality of non-void-forming concave portions 6N and may further include a plurality of void-forming concave portions 6G. The top portions 51 of the plurality of non-void-forming projections 5N of one heat transfer plate 10 face and are connected to the bottom portions 61 of the plurality of non-void-forming recesses 6N of an adjacent heat transfer plate 10 above in the heat transfer plate stacking direction, respectively. The bottom portions 61 of the plurality of non-void-forming concave portions 6N of one heat transfer plate 10 face and are connected to the top portions 51 of the plurality of non-void-forming convex portions 5N of the adjacent heat transfer plate 10 below in the heat transfer plate stacking direction, respectively. The heat transfer plate 10 may be pressed from a flat plate by upper and lower mold cores having projections and depressions. The convex portion 5 is convex when viewed from the upper surface of the heat transfer plate 10, the convex portion 5 is concave when viewed from the lower surface of the heat transfer plate 10, the concave portion 6 is concave when viewed from the upper surface of the heat transfer plate 10, and the concave portion 6 is convex when viewed from the lower surface of the heat transfer plate 10.

Referring to fig. 5, 6, 7, 9, 12, at least one of the plurality of void-forming projections 5G of the first heat transfer plate 10A or at least one row of the top portions 51 is the same as a predetermined void, which is spaced apart from each other, of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B corresponding to the at least one of the at least one row of the top portions 51 of the first heat transfer plate 10A and at least another one of the plurality of void-forming projections 5G of the first heat transfer plate 10A or at least another one of the top portions 51 of the plurality of void-forming projections 5G is the same as a predetermined void, which is spaced apart from each other, of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B corresponding to the at least another one of the at least another row of the top portions 51 of the first heat transfer plate 10A. As shown in fig. 8, at least one of the plurality of void-forming projections 5G or at least one row of the tops 51 of the first heat transfer plate 10A is different from a predetermined void G1 of the bottoms 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, which is spaced apart from each other by the bottom 61 corresponding to the at least one of the at least one row of the tops 51 of the first heat transfer plate 10A, and at least another one of the tops 51 of the plurality of void-forming projections 5G or at least another row of the tops 51 of the first heat transfer plate 10A is different from a predetermined void G2 of the bottoms 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, which is spaced apart from each other by the bottom 61 corresponding to the at least another one of the at least another row of the tops 51 of the first heat transfer plate 10A. With this configuration, more turbulence in the fluid flow direction of the heat exchange medium can be obtained.

Referring to fig. 5 to 10, 12, in the embodiment of the present utility model, the top 51 of the void-forming protrusion 5G of the first heat transfer plate 10A protrudes upward by a smaller distance than the top 51 of the non-void-forming protrusion 5N of the first heat transfer plate 10A. At least one of the top portions 51 or at least one row of the plurality of void-forming projections 5G of the first heat transfer plate 10A may protrude upward by the same distance (see fig. 5, 6, 7, 9, 10, 12) or by a different distance (see fig. 8) than at least another one of the top portions 51 or at least another row of the plurality of void-forming projections 5G of the first heat transfer plate 10A. In the case where the top 51 of the convex portion 5G protrudes upward by different distances, more turbulence in the fluid flow direction of the heat exchange medium can be obtained. As an alternative to the above or on the basis of the above, referring to fig. 5, the bottom 61 of the void-forming recess 6G of the second heat transfer plate 10B is recessed downward by a smaller distance than the bottom 61 of the non-void-forming recess 6N of the second heat transfer plate 10B. It is to be understood that the following examples are also possible as long as a void is formed between the top 5 of the non-void forming protrusion 5N of the first heat transfer plate 10A and the bottom 61 of the non-void forming recess 6N of the second heat transfer plate 10B: the top 51 of the void-forming projections 5G of the first heat transfer plate 10A may protrude upward by the same or a greater distance than the top 51 of the non-void-forming projections 5N of the first heat transfer plate 10A; the bottom 61 of the void forming recess 6G of the second heat transfer plate 10B may be recessed downward by the same distance (see fig. 6, 7, 8, 9, 12) or more than the bottom 61 of the non-void forming recess 6N of the second heat transfer plate 10B. At least one of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B or at least one row may be recessed the same or a different distance as at least another one of the bottom portions 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B or at least another row. In the case where the bottom 61 of the recess 6G is recessed downward by different distances, more turbulence in the fluid flow direction of the heat exchange medium can be obtained.

Referring to fig. 5-9, 12, in an embodiment of the utility model, the difference in height between at least one of the plurality of void-forming projections 5G of the first heat transfer plate 10A or at least one row of the tops 51 and the top 51 of the non-void-forming projections 5N of the first heat transfer plate 10A, and the difference in height between the bottom 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, which corresponds to the at least one of the at least one row of the tops 51 of the first heat transfer plate 10A, and the bottom 61 of the non-void-forming recesses 6N of the second heat transfer plate 10B, are the same (see fig. 5) or different (see fig. 6-9, 12). Referring to fig. 6-9, 12, the bottom 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, which corresponds to the at least one or at least one row of tops 51 of the first heat transfer plate 10A, is recessed the same distance as the bottom 61 of the non-void-forming recess 6N of the second heat transfer plate 10B.

In the case where the difference in height between at least one of the plurality of void-forming projections 5G of the first heat transfer plate 10A or at least one row of the tops 51 and the top 51 of the non-void-forming projections 5N of the first heat transfer plate 10A, and the difference in height between the bottom 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B, which corresponds to the at least one of the at least one row of the tops 51 of the first heat transfer plate 10A, and the bottom 61 of the non-void-forming recesses 6N of the second heat transfer plate 10B, is the same, the first heat transfer plate 10A and the second heat transfer plate 10B may be symmetrical with respect to a plane perpendicular to the stacking direction, see fig. 5. The first heat transfer plate 10A and the second heat transfer plate 10B have the same or similar stretching areas, improving the reliability of the product. In the conventional point wave heat exchanger, the main flow direction of the heat exchange medium is in the same plane, so that the heat exchange medium basically flows along the approximate two-dimension of the heat transfer plate. In case the height differences are different, see fig. 6-9, 12, a flow of the heat exchanging medium with a high and low fluctuation can be realized, i.e. the heat exchanging medium is realized in the depth direction of the heat transfer plate in addition to the approximately two-dimensional flow along the surface of the heat transfer plate, thereby realizing a three-dimensional flow of the heat exchanging medium. Thus, more turbulence in the flow direction of the heat exchange medium can be obtained to obtain better heat exchange performance. When the top 51 of the void forming protrusion 5G of the first heat transfer plate 10A protrudes upward by a larger distance than the top 51 of the non-void forming protrusion 5N of the first heat transfer plate 10A, or when the bottom 61 of the void forming recess 6G of the second heat transfer plate 10B is recessed downward by a larger distance than the bottom 61 of the non-void forming recess 6N of the second heat transfer plate 10B, disturbance of the heat exchange medium may be further improved to obtain better heat exchange performance.

Referring to fig. 7, in an embodiment of the present utility model, the first heat transfer plate 10A further includes: the plurality of concave portions 6 recessed downward, the concave portion 6 of the first heat transfer plate 10A has a bottom portion 61, and the plurality of concave portions 6 of the first heat transfer plate 10A include a plurality of void-forming concave portions 6G. The plurality of heat transfer plates 10 further includes: a third heat transfer plate 10C, the first heat transfer plate 10A being stacked on the third heat transfer plate 10C, the third heat transfer plate 10C including: a plurality of projections 5 projecting upward, the projections 5 of the third heat transfer plate 10C having a top 51, and the plurality of projections 5 of the third heat transfer plate 10C including a plurality of void-forming projections 5G; and the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C face each other in the stacking direction with the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A, respectively, and are spaced apart by a predetermined void G3. The predetermined gap G3 may be different from the predetermined gap G1, and of course, the predetermined gap G3 may be the same as the predetermined gap G1. The top 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C and the bottom 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A, respectively, are not welded together. For example, the heat exchange medium may flow through a predetermined gap. The projections of the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C on a plane perpendicular to the stacking direction may substantially coincide with the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A on a plane perpendicular to the stacking direction, respectively, or the projections of the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C on a plane perpendicular to the stacking direction may be located within the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A on a plane perpendicular to the stacking direction, respectively, or the projections of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A may be located within the projections of the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C on a plane perpendicular to the stacking direction, respectively. The plurality of projections 5 of the third heat transfer plate 10C further includes a plurality of non-void forming projections 5N, the plurality of recesses 6 of the first heat transfer plate 10A further includes a plurality of non-void forming recesses 6N, and the top portions 51 of the plurality of non-void forming projections 5N of the third heat transfer plate 10C face each other and are connected to the bottom portions 61 of the plurality of non-void forming recesses 6N of the first heat transfer plate 10A, respectively.

Referring to fig. 7, at least one of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least one row of the top portions 51 is the same as a predetermined void, of the bottoms 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A, which are spaced apart from each other by the bottoms 61 of the third heat transfer plate 10C corresponding to the at least one of the at least one row of the top portions 51, and at least another of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least another row of the top portions 51 is spaced apart from each other by the bottoms 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A. At least one of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least one row of the top portions 51 may be spaced apart from a predetermined void of the bottom 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A, which is spaced apart from the bottom 61 of the third heat transfer plate 10C, which corresponds to the at least one of the at least one row of the top portions 51, and at least another one of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least another row of the top portions 51 may be different from a predetermined void of the bottom 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A, which is spaced apart from the bottom 61 of the third heat transfer plate 10C, which corresponds to the at least another one of the at least another row of the top portions 51. With this configuration, more turbulence in the fluid flow direction of the heat exchange medium can be obtained.

Referring to fig. 7, in the embodiment of the utility model, the bottom 61 of the void-forming recess 6G of the first heat transfer plate 10A is recessed downward by a smaller distance than the bottom 61 of the non-void-forming recess 6N of the first heat transfer plate 10A. Of course, the bottom 61 of the void-forming recess 6G of the first heat transfer plate 10A may be recessed downward by the same or a greater distance than the bottom 61 of the non-void-forming recess 6N of the first heat transfer plate 10A with the clearance ensured. At least one of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A or at least one row may be recessed the same or a different distance as at least another one of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A or at least another row. As an alternative to the above or on the basis of the above, the top 51 of the void-forming projections 5G of the third heat transfer plate 10C may protrude upward a smaller distance than the top 51 of the non-void-forming projections 5N of the third heat transfer plate 10C. Of course, the top 51 of the void-forming projections 5G of the third heat transfer plate 10C may protrude upward by the same distance or more than the top 51 of the non-void-forming projections 5N of the third heat transfer plate 10C with the clearance ensured. At least one of the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least one row may protrude upward by the same or different distances as at least another one of the top portions 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C or at least another row.

According to an embodiment of the utility model, referring to fig. 7, at least one of the bottom portions 61 of the plurality of void-forming recesses 6G of the first heat transfer plate 10A or the height difference between at least one row of bottom portions 61 and the bottom portion 61 of the non-void-forming recess 6N of the first heat transfer plate 10A, and the height difference between the top portion 51 of the plurality of void-forming projections 5G of the third heat transfer plate 10C, which corresponds to the at least one of the bottom portions 61 or the at least one row of bottom portions 61 of the first heat transfer plate 10A, and the top portion 51 of the non-void-forming projections 5N of the third heat transfer plate 10C are the same or different.

Referring to fig. 2, 3, 4, the plurality of void-forming projections 5G of the first heat transfer plate 10A and the plurality of void-forming recesses 6G of the second heat transfer plate 10B are located in at least a partial area of the heat transfer area 21 of the plate heat exchanger 100 and/or in at least a partial area of the port area 22 surrounding the inlet port. The plurality of void-forming raised portions 5G of the third heat transfer plate 10C and the plurality of void-forming recessed portions 6G of the first heat transfer plate 10A are located in at least a partial area of the heat transfer area 21 of the plate heat exchanger 100 and/or at least a partial area of the port area 22 surrounding the inlet port. The inventive concept may also be applied to the entire heat transfer plate 10, as indicated by hatching in fig. 3, i.e. the inventive concept may be applied to heat transfer areas and port areas of a plate heat exchanger. The inventive concept may also be applied only to a partial area of a plate heat exchanger. For example, the concepts of the present utility model have application only to heat exchange zones to improve heat exchange performance while reducing the charge of one heat exchange medium. For example, the inventive concept is only applied to the port area surrounding the inlet port to obtain more turbulence in the area around the inlet port for the heat exchange medium into the plate heat exchanger for better heat exchange performance, as indicated by the hatching in fig. 4. It is noted that although fig. 4 shows a hatched area around the inlet port for one heat exchange medium into the plate heat exchanger, the inventive concept may also be applied to an area around the inlet port for another heat exchange medium into the plate heat exchanger, or to an area around all inlet ports. Furthermore, the inventive concept may also be used for other types of plate heat exchangers, not limited to the type of plate heat exchanger shown in the figures.

Referring to fig. 6, in the embodiment of the present utility model, the predetermined gaps G, G, G2 are 10% to 50% of the maximum height Hm of the channel 101 formed between the first heat transfer plate 10A and the second heat transfer plate 10B. The predetermined gaps G, G, G2 may be in the range of 0.1mm to 0.5 mm. Also, referring to fig. 7, the predetermined clearance G3 is 10% to 50% of the maximum height of the channels 101 formed between the first heat transfer plate 10A and the third heat transfer plate 10C. The predetermined gap G3 may be in the range of 0.1mm to 0.5 mm. The voids in these size ranges and the small particles of solder attached to the surface of the heat transfer plate in the area where the voids are located can better excite the nucleate boiling effect, thereby further greatly improving the heat exchange performance.

Referring to fig. 5 to 9, in an embodiment of the present utility model, the plate heat exchanger 100 includes a plurality of the first heat transfer plates 10A and a plurality of the second heat transfer plates 10B, and a plurality of the first heat transfer plates 10A and a plurality of the second heat transfer plates 10B are alternately arranged. In other words, the plate heat exchanger 100 may comprise only two heat transfer plates. That is, the second heat transfer plate 10B and the third heat transfer plate 10C are the same heat transfer plate. Of course, the plate heat exchanger 100 may also comprise three or more heat transfer plates. Further, the plurality of concave portions 6 of the first heat transfer plate 10A may be all non-void forming concave portions 6N, and the plurality of convex portions 5 of the third heat transfer plate 10C may be all non-void forming convex portions 5N.

Referring to fig. 9, in an embodiment of the present utility model, at least one or at least one row of the plurality of void-forming projections 5G of the first heat transfer plate 10A has a concave portion 52, the concave portion 52 is recessed downward in the top 51 of the at least one or at least one row of the plurality of void-forming projections 5G of the first heat transfer plate 10A when viewed in the stacking direction. Further, as an alternative to or on the basis of the above, at least one of the plurality of void-forming recesses 6G of the second heat transfer plate 10B or at least one row may also have a concave portion that is recessed upward in the bottom 61 of the plurality of void-forming recesses 6G of the second heat transfer plate 10B as seen in the stacking direction.

Referring to fig. 10 to 12, in an embodiment of the utility model, at least one or at least one row of the tops 51 of the projections 5 and/or at least one row of the bottoms 61 of the recesses 6 of the heat transfer plate 10 may be flat and may be circular, oval, etc. as seen in the stacking direction. For example, the top 51 of the protruding portion 5 of the first heat transfer plate 10A and the bottom 61 of the recessed portion 6 of the second heat transfer plate 10B may be flat. The bottom 61 of the recess 6 of the first heat transfer plate 10A and the top 51 of the protrusion 5 of the third heat transfer plate 10C may be flat. The second heat transfer plate 10B further includes: a plurality of projections 5 projecting upward, the projections 5 of the second heat transfer plate 10B having a top 51, the top 51 of the projections 5 of the second heat transfer plate 10B may be flat.

Referring to fig. 10, 12, in the embodiment of the present utility model, the plurality of void-forming projections 5G of the first heat transfer plate 10A includes a plurality of void-forming projection groups, each void-forming projection group including at least one empty void-forming projection 5G of the first heat transfer plate 10A. The plurality of non-void-forming projections 5N of the first heat transfer plate 10A includes a plurality of non-void-forming projection groups, each including at least one row of non-void-forming projections 5N of the first heat transfer plate 10A. The plurality of void-forming protrusion groups and the plurality of non-void-forming protrusion groups are alternately arranged. The number of rows of the void forming projections 5G of the plurality of void forming projection groups is the same or different; and/or the number of rows of non-void forming projections 5N of the plurality of non-void forming projection groups is the same or different. The number of rows of the void-forming projections 5G of the at least one void-forming projection group may be the same as or different from the number of rows of the non-void-forming projections 5N of the at least one non-void-forming projection group. The above concepts can be applied to the convex 5 and concave 6 portions of any one plate. In fig. 10 and 12, a plurality of void-forming convex parts groups including a row of void-forming convex parts 5G and a plurality of non-void-forming convex parts groups including a row of non-void-forming convex parts 5N are alternately arranged. The multiple-row void-forming convex portions 5G are not welded with the corresponding multiple-row void-forming concave portions 6G, and the multiple-row non-void-forming convex portions 5N are welded with the corresponding multiple-row non-void-forming concave portions 6N. For example, the heat transfer plate may employ a distribution of the following projections 5:

A row of non-void-forming projections 5N, a row of void-forming projections 5G, a row of non-void-forming projections 5N, a row of void-forming projections 5G distributed;

a row of non-void forming convex parts 5N, a row of void forming convex parts 5G, a row of non-void forming convex parts 5N, a row of void forming convex parts 5G are distributed; or (b)

A row of non-void-forming convex parts 5N, a row of void-forming convex parts 5G, a row of non-void-forming convex parts 5N, a row of void-forming convex parts 5G are distributed.

That is, the distribution of the projections 5 of the heat transfer plate may be set as needed. The above-described distribution may be used for the concave portions 6 of the heat transfer plate, and only the convex portions 5 in the above-described distribution may be replaced with the concave portions 6.

According to an embodiment of the utility model, some of the bottoms 61 of mutually facing recesses 6 and some of the tops 51 of the protrusions 5 of adjacent heat transfer plates, respectively, are not welded together, e.g. some of the bottoms 61 of mutually facing recesses 6 and some of the tops 51 of the protrusions 5 of adjacent heat transfer plates, respectively, form a void, whereby the formation of weld spots will be hindered. Thus, there is more space between adjacent heat transfer plates on the side of the heat transfer plates where there is a void, and thus the pressure drop on this side will be reduced. The volume of the channels on the other side of the heat transfer plate will be correspondingly reduced and the filling amount of the heat transfer medium will be reduced. The reduction in the weld area may create more heat exchange area to improve heat exchange performance. In addition, these voids and small particles of solder attached to the surface of the heat transfer plate in the area where the voids are located will excite the nucleate boiling effect, thereby further greatly improving the heat exchange performance. For example, some refrigerants are flammable refrigerants that can burn or even explode under certain conditions, and thus related legal regulations place a limiting requirement on the charge of these refrigerants in air conditioning systems. This presents challenges to the design of the plate heat exchanger, both to reduce the charge of refrigerant on the refrigerant side and to ensure heat exchange performance. According to some embodiments of the utility model, on the channel side for circulating coolant (e.g., water), there are spaces between some of the bottoms 61 of the mutually facing recesses 6 and some of the tops 51 of the projections 5 of adjacent heat transfer plates, respectively, without welding together. The reduction of the welding area can form more heat exchange area so as to improve the heat exchange performance; and the refrigerant charge will be reduced due to the corresponding reduction in volume of the channels on the other side of the heat transfer plate, the channels for the flow of refrigerant. According to some embodiments of the utility model, there is a space between some of the bottoms 61 of the mutually facing concave portions 6 and some of the tops 51 of the convex portions 5 of adjacent heat transfer plates, respectively, without welding together, on the channel side for circulating the refrigerant. The gaps and the solder small particles attached to the surface of the heat transfer plate in the area where the gaps are positioned excite the nucleate boiling effect, thereby further greatly improving the heat exchange performance; and the reduction of the welding area can form more heat exchange area so as to improve heat exchange performance. Particularly for plate heat exchangers for charging low-and medium-pressure refrigerant. In the embodiment shown in fig. 7, the top 51 of the plurality of void-forming protrusions 5G is spaced apart from the bottom 61 of the plurality of void-forming recesses 6G, respectively, by a predetermined void on both sides of at least one heat transfer plate or on both sides of each heat transfer plate. The pressure drop of the channels of the heat transfer plate can be reduced at both sides of the heat transfer plate, the heat exchange area can be increased, and the heat exchange performance can be improved.

Although the above embodiments have been described, some of the above embodiments and some of the features of the above embodiments can be combined to form new embodiments.

Claims (30)

1. A plate heat exchanger, comprising:

a first heat transfer plate, the first heat transfer plate comprising: a plurality of projections protruding upward, the projections of the first heat transfer plate having a top, and the plurality of projections of the first heat transfer plate including a plurality of void-forming projections; and

a second heat transfer plate stacked on the first heat transfer plate in a stacking direction, the second heat transfer plate including a plurality of concave portions recessed downward, the concave portions of the second heat transfer plate having a bottom, and the plurality of concave portions of the second heat transfer plate including a plurality of void forming concave portions,

wherein tops of the plurality of void-forming projections of the first heat transfer plate and bottoms of the plurality of void-forming recesses of the second heat transfer plate face each other in the stacking direction and are spaced apart by a predetermined void, respectively.

2. A plate heat exchanger according to claim 1, wherein:

the plurality of projections of the first heat transfer plate further comprises a plurality of non-void forming projections,

the plurality of recesses of the second heat transfer plate further includes a plurality of non-void forming recesses, an

The tops of the plurality of non-void-forming projections of the first heat transfer plate and the bottoms of the plurality of non-void-forming recesses of the second heat transfer plate face each other and are connected to each other, respectively.

3. A plate heat exchanger according to claim 2, wherein:

the top of the void-forming projections of the first heat transfer plate protrudes upward the same, a smaller or a greater distance than the top of the non-void-forming projections of the first heat transfer plate.

4. A plate heat exchanger according to claim 2, wherein:

the bottom of the void-forming recess of the second heat transfer plate is recessed downwardly by the same, smaller or greater distance than the bottom of the non-void-forming recess of the second heat transfer plate.

5. A plate heat exchanger according to claim 2 or 3 or 4, wherein:

the height difference between at least one of the plurality of void-forming projections of the first heat transfer plate or at least one row of the tops and the non-void-forming projections of the first heat transfer plate, and the height difference between the bottom of the plurality of void-forming recesses of the second heat transfer plate, which corresponds to the at least one of the at least one row of the tops of the first heat transfer plate, and the bottom of the non-void-forming recesses of the second heat transfer plate, are the same or different.

6. A plate heat exchanger according to claim 3, wherein:

at least one of the top portions of the plurality of void-forming projections of the first heat transfer plate or at least one row protrudes upward by the same or different distance as at least another of the top portions of the plurality of void-forming projections of the first heat transfer plate or at least another row.

7. A plate heat exchanger according to claim 4, wherein:

at least one of the bottoms of the plurality of void-forming recesses of the second heat transfer plate or at least one row is recessed downwards by the same or different distance as at least another of the bottoms of the plurality of void-forming recesses of the second heat transfer plate or at least another row.

8. A plate heat exchanger according to claim 1, wherein:

the plurality of void-forming projections of the first heat transfer plate and the plurality of void-forming recesses of the second heat transfer plate are located in at least a partial area of the heat transfer area of the plate heat exchanger and/or at least a partial area of the port area surrounding the inlet port.

9. A plate heat exchanger according to claim 1, wherein:

the plate heat exchanger includes a plurality of the first heat transfer plates and a plurality of the second heat transfer plates, the plurality of the first heat transfer plates and the plurality of the second heat transfer plates being alternately arranged.

10. A plate heat exchanger according to claim 1, wherein:

the predetermined clearance is 10% to 50% of the maximum height of the channel formed between the first heat transfer plate and the second heat transfer plate.

11. A plate heat exchanger according to claim 1, wherein:

the predetermined gap is in the range of 0.1mm to 0.5 mm.

12. A plate heat exchanger according to claim 1, wherein:

the first heat transfer plate further includes: a plurality of concave portions recessed downward, the concave portions of the first heat transfer plate having a bottom, and the plurality of concave portions of the first heat transfer plate including a plurality of void-forming concave portions;

the plate heat exchanger further comprises: a third heat transfer plate on which the first heat transfer plate is stacked, the third heat transfer plate including: a plurality of projections protruding upward, the projections of the third heat transfer plate having a top, and the plurality of projections of the third heat transfer plate including a plurality of void-forming projections; and

the tops of the plurality of void-forming projections of the third heat transfer plate and the bottoms of the plurality of void-forming recesses of the first heat transfer plate, respectively, face each other in the stacking direction and are spaced apart by a predetermined void.

13. A plate heat exchanger according to claim 12, wherein:

The plurality of projections of the third heat transfer plate further includes a plurality of non-void forming projections,

the plurality of recesses of the first heat transfer plate further includes a plurality of non-void forming recesses, an

The top portions of the plurality of non-void-forming projections of the third heat transfer plate face and are connected to the bottom portions of the plurality of non-void-forming recesses of the first heat transfer plate, respectively.

14. A plate heat exchanger according to claim 13, wherein:

the bottom of the void-forming recess of the first heat transfer plate is recessed downwardly by the same, smaller or greater distance than the bottom of the non-void-forming recess of the first heat transfer plate.

15. A plate heat exchanger according to claim 13, wherein:

the top of the void-forming projections of the third heat transfer plate protrudes upward the same, a smaller or a greater distance than the top of the non-void-forming projections of the third heat transfer plate.

16. A plate heat exchanger according to claim 13, wherein:

at least one of the plurality of void-forming recesses of the first heat transfer plate or at least one row of the bottoms and the non-void-forming recesses of the first heat transfer plate have the same or different height difference between the top of the plurality of void-forming projections of the third heat transfer plate, which corresponds to the at least one of the at least one row of bottoms of the first heat transfer plate, and the top of the non-void-forming projections of the third heat transfer plate.

17. A plate heat exchanger according to claim 14, wherein:

at least one of the bottoms of the plurality of void-forming recesses of the first heat transfer plate or at least one row is recessed downwards by the same or different distance as at least another of the bottoms of the plurality of void-forming recesses of the first heat transfer plate or at least another row.

18. A plate heat exchanger according to claim 15, wherein:

at least one of the top portions of the plurality of void-forming projections of the third heat transfer plate or at least one row protrudes upward by the same or different distance as at least another of the top portions of the plurality of void-forming projections of the third heat transfer plate or at least another row.

19. A plate heat exchanger according to claim 12, wherein:

the plurality of void-forming projections of the third heat transfer plate and the plurality of void-forming recesses of the first heat transfer plate are located in at least a partial area of the heat transfer area of the plate heat exchanger and/or at least a partial area of the port area surrounding the inlet port.

20. A plate heat exchanger according to claim 12, wherein:

the second heat transfer plate and the third heat transfer plate are the same heat transfer plate.

21. A plate heat exchanger according to claim 1, wherein:

The first heat transfer plate further includes: a plurality of concave portions recessed downward, the concave portions of the first heat transfer plate having a bottom, and the plurality of concave portions of the first heat transfer plate including a plurality of non-void forming concave portions;

the plate heat exchanger further comprises: a third heat transfer plate on which the first heat transfer plate is stacked, the third heat transfer plate including: a plurality of projections protruding upward, the projections of the third heat transfer plate having a top, and the plurality of projections of the third heat transfer plate including a plurality of non-void forming projections; and

the top portions of the plurality of non-void-forming projections of the third heat transfer plate and the bottom portions of the plurality of non-void-forming recesses of the first heat transfer plate face and are connected to each other in the stacking direction, respectively.

22. A plate heat exchanger according to claim 21, wherein:

the second heat transfer plate and the third heat transfer plate are the same heat transfer plate.

23. A plate heat exchanger according to claim 21 or 22, wherein:

the plurality of concave parts of the first heat transfer plate are all non-gap forming concave parts;

the plurality of projections of the third heat transfer plate are non-void forming projections.

24. A plate heat exchanger according to claim 1, wherein:

At least one or at least one row of the plurality of void-forming projections of the first heat transfer plate has a concave portion that is recessed downward in a top portion of the at least one or at least one row of the plurality of void-forming projections of the first heat transfer plate when viewed in the stacking direction.

25. A plate heat exchanger according to claim 1, wherein:

the top of the protruding portion of the first heat transfer plate and the bottom of the recessed portion of the second heat transfer plate are flat.

26. A plate heat exchanger according to claim 12, wherein:

the bottom of the recess of the first heat transfer plate and the top of the protrusion of the third heat transfer plate are flat.

27. A plate heat exchanger according to claim 1, wherein:

the second heat transfer plate further includes: and a plurality of protruding portions protruding upward, the protruding portions of the second heat transfer plate having a top portion, the top portion of the protruding portions of the second heat transfer plate being flat.

28. A plate heat exchanger according to claim 2 or 3, wherein:

the plurality of void-forming projections of the first heat transfer plate includes a plurality of void-forming projection sets, each void-forming projection set including at least one empty void-forming projection of the first heat transfer plate;

The plurality of non-void-forming projections of the first heat transfer plate includes a plurality of non-void-forming projection groups, each non-void-forming projection group including at least one row of non-void-forming projections of the first heat transfer plate; and

the plurality of void-forming protrusion groups and the plurality of non-void-forming protrusion groups are alternately arranged.

29. A plate heat exchanger according to claim 28, wherein:

the number of rows of the void forming projections of the plurality of void forming projection groups is the same or different; and/or

The number of rows of non-void forming projections of the plurality of non-void forming projection groups is the same or different.

30. A plate heat exchanger according to claim 28, wherein:

the number of rows of void-forming projections of the at least one void-forming projection group is the same as or different from the number of rows of non-void-forming projections of the at least one non-void-forming projection group.