CN111238271A - A heat exchanger core for printed circuit board heat exchangers - Google Patents

Abstract

The invention proposes a heat exchanger core for a printed circuit board heat exchanger, which includes a plurality of unit plates. The unit plates include a first heat exchange plate body and a second heat exchange plate body that are connected in layers. The first heat exchange plate body is One side of the plate body is provided with a first hot fluid groove, the other side is provided with a first cold fluid groove, and a second hot fluid groove and a second cold fluid groove are opened on the second heat exchange plate body symmetrically to the first heat exchange plate body. The fluid groove, the first hot fluid groove and the second hot fluid groove are closed to form a hot fluid channel, and the first cold fluid groove and the second cold fluid groove are closed to form a cold fluid channel. In the present invention, the hot and cold fluid channels are formed by grooving multiple heat exchange plates on both sides, thereby increasing the flow area; by setting the grooves as V-shaped grooves, the cold and hot fluid channels can be arranged more compactly, and the heat exchange is fully utilized. Plates, and the hot fluid channel can be partially embedded between the cold fluid channels, so that the cold and hot fluid channels have more heat exchange area and improve the heat exchange efficiency.

Description

A heat exchanger core for printed circuit board heat exchangers

technical field

The invention relates to the field of chemical equipment, in particular to a heat exchanger core for a printed circuit board heat exchanger.

Background technique

The printed circuit board heat exchanger has the characteristics of high compactness, small volume, high structural strength, and high temperature and pressure bearing capacity. At present, the heat exchanger core of the printed circuit board heat exchanger is usually chemically etched first, then the cold and hot runners are arranged, and then the heat exchanger core is formed by diffusion welding or brazing. However, the heat transfer surface of the heat exchanger core of the printed circuit board heat exchanger is still a single heat transfer surface, and the flow area is small, so the heat exchange plate cannot be used well to achieve greater heat exchange efficiency.

SUMMARY OF THE INVENTION

In view of the above technical problems, the present invention proposes a heat exchanger core for a printed circuit board heat exchanger to solve the problem that the heat exchanger core of the printed circuit board heat exchanger in the prior art is a single heat transfer surface , The problem of not making good use of the heat exchange plate to achieve greater heat exchange efficiency.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

A heat exchanger core for a printed circuit board heat exchanger, the unit plate comprises a first heat exchange plate body and a second heat exchange plate body that are connected in layers, the first heat exchange plate body facing the second heat exchange plate body One side of the heat exchange plate body is provided with a first hot fluid groove, and the other side is provided with a first cold fluid groove, and the second heat exchange plate body is provided with a second hot fluid groove symmetrical to the first heat exchange plate body. and the second cold fluid tank, the first heat exchange plate body and the second heat exchange plate body are closed and connected so that the first hot fluid tank and the second hot fluid tank are closed to form a hot fluid channel; The adjacent first cold fluid groove and the second cold fluid groove are closed to form a cold fluid channel.

Further, the first hot fluid groove, the first cold fluid groove, the second hot fluid groove and the second cold fluid groove are all V-shaped grooves.

Further, the top corners of the V-shaped grooves are rounded corners.

Further, the first heat exchange plate body is provided with a plurality of first hot fluid grooves and a plurality of first cold fluid grooves, and the plurality of first hot fluid grooves are arranged at equal intervals on the first heat exchange plate body, A plurality of first cold fluid grooves are also arranged on the first heat exchange plate body at equal intervals, and the mirror images of the first cold fluid grooves and the first hot fluid grooves are staggered by 1/2 distance.

Further, the distribution shapes of the hot fluid passages and the cold fluid passages on the heat exchanger core are S-shaped, Z-shaped or straight-channel type.

Further, a boundary cover plate is also included, the boundary cover plate is arranged on both ends of the heat exchanger core and is stacked and airtightly connected with the unit plate.

Beneficial effects of the present invention: the present invention provides a plurality of symmetrical first heat exchange plate bodies and second heat exchange plate bodies, and the double-sided grooves of the first heat exchange plate body and the second heat exchange plate body are sealed and connected The hot fluid channel and the cold fluid channel are formed later, which increases the circulation area of the hot and cold fluids and improves the heat exchange efficiency. On the core body, the interval between the hot fluid channel and the cold fluid channel is smaller, and the heat exchange plate is fully utilized to improve the heat exchange efficiency; the hot fluid channel can be partially embedded in the interval of the cold fluid channel, so as to make the cold fluid channel and the hot fluid channel There are more heat exchange areas to further improve the heat exchange efficiency.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1, in Embodiment 1 of the present invention, a heat exchanger core for a printed circuit board heat exchanger includes a plurality of unit plates 1, and the unit plates 1 include a first heat exchange plate body 11 and a layered connection. The second heat exchange plate body 12, the first heat exchange plate body 11 is disposed on the upper side of the second heat exchange plate body 12, and the side of the first heat exchange plate body 11 facing the second heat exchange plate body 12 is the first heat exchange plate body 12. The lower side of a heat exchange plate body 11 is provided with a first hot fluid groove 111 , the other side of the first heat exchange plate body 11 ie the upper side is provided with a first cold fluid groove 112 , the second heat exchange plate body 12 A second hot fluid groove 121 and a second cold fluid groove 122 are opened symmetrically to the first heat exchange plate body 11, that is, the upper side of the second heat exchange plate body 12 is provided with a second hot fluid groove 121, and the lower side is provided with a second hot fluid groove 121. The second cold fluid tank 122, the second hot fluid tank 121 is facing the first hot fluid tank 111, the second cold fluid tank 122 is opposite to the first cold fluid tank 112, the first heat exchange plate body 11 and the second heat exchange The plate bodies 12 are closed and connected by welding to close the first hot fluid groove 111 and the second hot fluid groove 121 to form the hot fluid channel 2. In this embodiment, the first heat exchange plate body 11 and the second heat exchange plate body 12 are diffused. Welding connection; a plurality of unit plates 1 are stacked and connected in sequence to close the adjacent first cold fluid grooves 112 and second cold fluid grooves 122 to form cold fluid channels 3. In this embodiment, a plurality of unit plates 1 are sequentially connected by diffusion welding. The structure of the heat exchange plate core body can increase the flow area of the hot fluid channel 2 and the cold fluid channel 3, and the two sides of the heat exchange plate are well used to set the fluid heat exchange channel, which improves the heat exchange efficiency.

Further, the first hot fluid groove 111 , the first cold fluid groove 112 , the second hot fluid groove 121 and the second cold fluid groove 122 are all V-shaped grooves. The V-shaped grooves enable the first hot fluid grooves 111 and the first cold fluid grooves 112 to be staggered and spaced on the first heat exchange plate body 11 , and the second hot fluid grooves 121 and the second cold fluid grooves 122 can exchange heat on the second heat exchange plate. The plate body 12 is arranged at staggered intervals, so that the hot fluid channel 2 and the cold fluid channel 3 are more compactly arranged on the core body of the heat exchange plate, and the interval between the hot fluid channel 2 and the cold fluid channel 3 is smaller, and the heat exchange plate is fully utilized. Improve heat exchange efficiency.

Further, the top corner of the V-shaped groove, that is, the sharp corner in the middle of the V-shaped groove is rounded, which can reduce the stress at the sharp corner.

Further, the first heat exchange plate body 11 is provided with a plurality of first hot fluid grooves 111 and a plurality of first cold fluid grooves 112 , and the plurality of first hot fluid grooves 111 are arranged on the first heat exchange plate body 11 . The first cold fluid grooves 112 are also arranged at equal intervals on the first heat exchange plate body 11, and the mirror images of the first cold fluid grooves 112 and the first hot fluid grooves 111 are staggered by 1/2 distance, that is, The position of the first cold fluid groove 112 on the first heat exchange plate body 11 is a mirror image of the first hot fluid groove 111 and then moved laterally by 1/2 distance; correspondingly, the second heat exchange plate body 12 is provided with a plurality of The second hot fluid grooves 121 and the plurality of second cold fluid grooves 122, the plurality of second hot fluid grooves 121 are arranged at equal intervals on the second heat exchange plate body 12, and the plurality of second cold fluid grooves 122 are also in the second heat exchange plate body 12. The hot plate body 12 is arranged at equal intervals, and the mirror images of the second cold fluid grooves 122 and the second hot fluid grooves 121 are staggered by 1/2 distance, that is, the position of the second cold fluid grooves 122 on the second heat exchange plate body 12 is The second thermal fluid groove 121 is mirrored and then moved laterally by 1/2 distance. In this embodiment, the first cold fluid grooves 112 can be partially embedded in the spaces between the first hot fluid grooves 111 , and correspondingly, the second cold fluid grooves 122 can be partially embedded in the spaces between the second hot fluid grooves 121 . In this way, the cold fluid channel and the hot fluid channel have more heat exchange area and improve the heat exchange efficiency.

Further, the distribution shapes of the hot fluid channel 2 and the cold fluid channel 3 on the heat exchanger core are S-shaped, Z-shaped or straight channel type. In this embodiment, the hot fluid channel 2 and the cold fluid channel 3 are in The distribution shape on the heat exchanger core is S-shaped. In other embodiments, the distribution shape of the hot fluid channel 2 and the cold fluid channel 3 on the heat exchanger core is Z-shaped or straight channel type.

Further, a boundary cover plate 4 is also included, the boundary cover plate 4 is arranged at both ends of the heat exchanger core body and is connected to the unit plates in layers, and the boundary cover plate 4 can seal the heat fluid passages at both ends of the heat exchanger core body. 2 or cold fluid passage 3.

Example 2, as shown in Figure 2, differs from Example 1 in that one of the hot fluid channel 2 and the cold fluid channel 3 is a straight channel type, the other is a Z type, and the two ends of the Z type have two straight sides. The two corners between it and the middle straight line are both right angles, and the hot fluid channel 2 or cold fluid channel 3 located on the Z-shaped middle straight line is arranged in parallel with the cold fluid channel 3 or hot fluid channel 2 on the other straight channel type; The first hot fluid groove 111 and the first cold fluid groove 112 on the heat exchange plate body 11 are not only staggered by a distance in the transverse direction, but also the first hot fluid groove 111 and the first cold fluid groove 112 are also staggered by a certain distance in the longitudinal direction; Correspondingly, the second hot fluid grooves 121 and the second cold fluid grooves 122 on the second heat exchange plate body 12 are not only staggered in the lateral direction, but also the second hot fluid grooves 121 and the second cold fluid grooves 122 in the longitudinal direction. Stagger a certain distance, so that the Z-channel and the straight channel do not interfere with each other.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. A heat exchanger core body for a printed circuit board heat exchanger comprises a plurality of unit plates (1), and is characterized in that each unit plate (1) comprises a first heat exchange plate body (11) and a second heat exchange plate body (12) which are connected in a stacked mode, a first hot fluid groove (111) is formed in one side, facing the second heat exchange plate body (12), of each first heat exchange plate body (11), a first cold fluid groove (112) is formed in the other side of each first heat exchange plate body, a second hot fluid groove (121) and a second cold fluid groove (122) are formed in the second heat exchange plate body (12) and are symmetrical to the first heat exchange plate body (11), and the first heat exchange plate body (11) and the second heat exchange plate body (12) are connected in a closed mode so that the first hot fluid groove (11) and the second hot fluid groove (121) form a closed fluid channel (2); a plurality of unit plates (1) are sequentially connected in a stacked manner so that the adjacent first cold fluid grooves (112) and second cold fluid grooves (122) are closed to form cold fluid channels (3).

2. The heat exchanger core for a printed circuit board heat exchanger according to claim 1, wherein the first hot fluid groove (111), the first cold fluid groove (112), the second hot fluid groove (121), and the second cold fluid groove (122) are all V-shaped grooves.

3. The heat exchanger core for a printed circuit board heat exchanger according to claim 2, wherein the apex angles of the V-shaped grooves are rounded.

4. The heat exchanger core for the printed circuit board heat exchanger according to any one of claims 1 to 3, wherein the first heat exchanger plate body (11) is provided with a plurality of first hot fluid grooves (111) and a plurality of first cold fluid grooves (112), the plurality of first hot fluid grooves (111) are arranged on the first heat exchanger plate body (11) at equal intervals, the plurality of first cold fluid grooves (112) are also arranged on the first heat exchanger plate body (11) at equal intervals, and the first cold fluid grooves (112) are staggered 1/2 intervals from the mirror image of the first hot fluid grooves (111).

5. Heat exchanger core for a printed circuit board heat exchanger according to claim 4, characterized in that the distribution shape of the hot fluid channels (2) and the cold fluid channels (3) on the heat exchanger core is S-shaped, Z-shaped or straight channel-shaped.

6. The heat exchanger core for a printed circuit board heat exchanger according to claim 1 or 2 or 3 or 5, further comprising boundary cover plates (4), wherein the boundary cover plates (4) are provided at both ends of the heat exchanger core and are laminated and connected with the unit plates in a closed manner.

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