Printed circuit board type heat exchanger

Abstract

The utility model discloses a printed circuit board type heat exchanger which comprises a first heat exchange plate, a second heat exchange plate and a cover plate. The first heat exchange plate comprises a plate body, a plurality of rib plates are arranged on the plate body, and the plate body is divided into a plurality of flow channels through the rib plates. Shunting ribs are arranged at the top ends of the rib plates in the middle of the plate body, converging ribs are arranged at the bottom ends of the rib plates on the two sides of the plate body, and the shunting ribs and the converging ribs are arc-shaped plates; the second heat exchange plates and the first heat exchange plates are the same in structure. The first heat exchange plates and the second heat exchange plates are alternately arranged, and runners are perpendicular to each other. The heat exchanger further comprises a plurality of headers which are internally provided with linkage cavities, and the flow channels of all the first heat exchange plates communicate with the flow channels of all the second heat exchange plates through the linkage cavities. The connecting pipes are in one-to-one correspondence with the headers and are communicated with the connecting cavities. By additionally arranging the shunting ribs and the converging ribs, the flow direction of fluid is forcibly changed, so that the purposes of shunting at an inlet and converging at an outlet are achieved, the velocity field distribution condition of the fluid in the heat exchanger is optimized, and the heat exchange effect of the heat exchanger is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment, in particular to a printed circuit board type heat exchanger. Background Art

[0002] Printed circuit board heat exchangers are microchannel plate heat exchangers with advantages such as compact structure, high temperature and high pressure resistance, safety and reliability. They are widely used in refrigeration and air conditioning, oil and gas, nuclear industry, chemical industry, and power industry. The heat exchange plate is the core component of the printed circuit board heat exchanger, providing both flow channels for high and low temperature working fluids and heat transfer area between them.

[0003] At present, the heat exchange plates of printed circuit board heat exchangers are formed by mechanical processing, chemical etching, etc. The flow channel size is generally at the millimeter level or below, the number of flow channels is large, the single flow cross-section is small, and the fluid flow rate is low; at the same time, since the size of the pipe is smaller than the size of the heat exchange plate, the uneven distribution of the fluid is further aggravated, resulting in poor overall heat exchange effect of the heat exchanger. Utility Model Content

[0004] The purpose of the utility model is to provide a printed circuit board type heat exchanger to solve the problems in the prior art of uneven fluid velocity field distribution, low overall heat exchange efficiency and poor heat exchange effect due to the small flow channel size and low flow velocity of the heat exchange plate.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A printed circuit board type heat exchanger comprises a first heat exchange plate and a second heat exchange plate arranged vertically, and also comprises a cover plate arranged on both sides of the first heat exchange plate and the second heat exchange plate;

[0007] The first heat exchange plate comprises a plate body, on which a plurality of ribs are provided, and a plurality of flow channels are separated by the ribs; the top of the ribs in the middle of the plate body is provided with a diverter rib, and the bottom of the ribs on both sides of the plate body is provided with a converging rib, and the diverter ribs and converging ribs are both arc-shaped plates facing the center line of the plate body;

[0008] The second heat exchange plate has the same structure as the first heat exchange plate; the first heat exchange plate and the second heat exchange plate are alternately arranged and the flow channels are perpendicular to each other;

[0009] The invention also includes a plurality of headers respectively covering both ends of the first heat exchange plate and the second heat exchange plate, wherein a connection cavity is provided inside the header, and the connection cavity connects the flow channels of all the first heat exchange plates and the flow channels of all the second heat exchange plates respectively;

[0010] It also includes connecting pipes corresponding to the connecting boxes one by one, and the connecting pipes are communicated with the connecting cavity.

[0011] Particularly, connecting cavities are left between the two ends of the ribs and the edges of the first and second heat exchange plates, and the ends of the diverter ribs and the converging ribs are flush with the edges of the first and second heat exchange plates.

[0012] Particularly, both ends of the ribs on the leftmost and rightmost sides of the first heat exchange plate are provided with guide arc plates inclined toward the central axis.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] The utility model forcibly changes the flow direction of the fluid by adding diverter ribs and converging ribs, thereby achieving the purpose of diverting the flow at the inlet and converging the flow at the outlet, effectively improving the fluid flow at the inlet and outlet of the heat exchange flow channel, optimizing the fluid velocity field distribution inside the heat exchanger, and thus enhancing the heat exchange effect of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the internal structure of the device of the present invention.

[0016] Figure 2 It is a schematic diagram of the first heat exchange plate structure with a header and a pipe.

[0017] Figure 3 It is a schematic diagram of the second heat exchange plate structure with a header and a pipe.

[0018] Figure 4 This is a schematic diagram of the structure of the utility model when viewed from above after the bottom header is removed.

[0019] Figure 5 for Figure 2 Schematic diagram of the structure at the cross section of the AA plane.

[0020] Figure 6 for Figure 2 Schematic diagram of the structure at the cross section of the middle BB surface.

[0021] The meanings of the numbers in the figure are: first heat exchange plate—1; second heat exchange plate—2; plate body—3; rib—4; diverter rib—5; converging rib—6; header—7; connecting cavity—8; connecting pipe—9; connecting cavity—10; cover plate—11; guide arc plate—12. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0023] like Figures 1 to 6As shown, a printed circuit board type heat exchanger includes a first heat exchange plate 1 and a second heat exchange plate 2 arranged vertically, and also includes a cover plate 11 arranged on both sides of the first heat exchange plate 1 and the second heat exchange plate 2;

[0024] The first heat exchange plate 1 includes a plate body 3, on which a plurality of ribs 4 are provided, and a plurality of flow channels are separated by the ribs 4; a diverter rib 5 is provided at the top of the rib 4 in the middle of the plate body 3, and a converging rib 6 is provided at the bottom of the rib 4 on both sides of the plate body 3, and the diverter rib 5 and the converging rib 6 are both arc-shaped plates facing the center line of the plate body 3;

[0025] The second heat exchange plate 2 has the same structure as the first heat exchange plate; the first heat exchange plate 1 and the second heat exchange plate 2 are arranged alternately and the flow channels are perpendicular to each other;

[0026] The invention also includes a plurality of headers 7 respectively covering both ends of the first heat exchange plate 1 and the second heat exchange plate 2. The headers 7 are provided with a connection cavity 8 inside, and the connection cavity 8 connects the flow channels of all the first heat exchange plates 1 and the flow channels of all the second heat exchange plates respectively.

[0027] It also includes a connecting pipe 9 corresponding to the connecting box 7 on a one-to-one basis, and the connecting pipe 9 is communicated with the connecting cavity 8.

[0028] The main principle of this utility model is as follows: This utility model can be used for heat exchange between fluids, between fluids and gases, and between gases. When the heat exchange medium is all fluid, the fluid enters the header 7 at the inlet end along the top pipe 9. The fluid is divided by the diverter ribs 5 at the inlet of the heat exchange plate, and then enters the flow channel of the rib plate section for heat exchange. After the heat exchange is completed, it is collected by the converging ribs 6 at the outlet section of the heat exchange plate and flows out through the pipe 9 at the outlet end.

[0029] During this process, since the diverter ribs 5 at the inlet end of the heat exchange plate are smoothly connected to the ribs 4 as a whole, the fluid can be forced to change its flow direction, thereby achieving the purpose of evenly diverting the fluid and optimizing the fluid velocity field. Then, through the converging ribs 6 at the outlet end, the fluid can converge toward the location of the outlet pipe 2 after passing through the middle section of the ribs 4 of the heat exchange plate for heat exchange, thereby facilitating the fluid to converge and flow out of the heat exchanger. The other layer of fluid can also use the heat exchange plates in this solution or conventional heat exchange plates. It should be noted that the width of the heat exchange flow channel narrows from the left and right ends of the first heat exchange plate 1 to the middle. By adding diverter ribs 5 with a certain curvature at the inlet end of the first heat exchange plate 1, the fluid flow direction is forced to change, achieving the purpose of fluid diversion. The curvature of the diverter ribs 5 depends on the size of the pipe, the characteristics of the flow channel, and the size of the plate. The smaller the pipe 9 is and the faster the fluid flow rate is, the larger the central curvature angle of the diverter ribs 5 and the larger the curvature angles of the ends of the converging ribs 6. When the fluid flow channel density on the first heat exchange plate 1 is high and the size is small, the diverter ribs 5 and converging ribs 6 can be arranged at intervals. From the center flow channel to the sides of the heat exchange plate, the number of interval flow channels between the diverter ribs 5 gradually increases, and the number of heat exchange flow channels between the converging ribs 6 gradually decreases, to achieve better distribution, thereby improving the problem of local high temperature inside the heat exchange core, improving the heat exchange effect and product life. The larger the size of the first heat exchange plate 1, the shorter the arc length of the diverter ribs 5 from the center to the left and right sides of the first heat exchange plate 1, ensuring that the diverter ribs 5 and converging ribs 6 can adjust the flow direction and flow rate of the fluid or gas as a whole. The second heat exchange plate 2 can also adopt this solution or the conventional solution.

[0030] As a preferred embodiment, a connecting cavity 10 is left between the two ends of the rib 4 and the edges of the first heat exchange plate 1 and the second heat exchange plate 2, and the ends of the diverter rib 5 and the converging rib 6 are flush with the edges of the first heat exchange plate 1 and the second heat exchange plate 2.

[0031] In the present invention, the purpose of reserving the connection cavity 10 at the end of the rib plate is to allow the working fluid on both sides of the dividing [2] rib 5 and between the converging rib 6 to evenly distribute the fluid resistance at the dividing [3] rib 5 or the converging rib 6, and also to facilitate the working fluid to be evenly distributed into each heat exchange flow channel.

[0032] As a preferred embodiment, both ends of the ribs 4 on the leftmost and rightmost sides of the first heat exchange plate 1 are provided with guide arc plates 12 inclined toward the central axis.

[0033] In the present invention, guide arc plates 12 are provided at both ends of the outermost ribs 4 on the left and right sides of the first heat exchange plate 1, wherein the guide arc plates 12 at the top are used to assist the diversion ribs 5 in diverting the working fluid entering the heat exchange flow channel, and the guide arc plates 12 at the bottom are used to assist the converging ribs 6 in converging the working fluid leaving the heat exchange flow channel, thereby achieving a better flow balancing effect.

[0034] The words "connection" and "fixation" appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0035] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A printed circuit board type heat exchanger, comprising a first heat exchange plate (1) and a second heat exchange plate (2) arranged vertically, and further comprising a cover plate (11) arranged on both sides of the first heat exchange plate (1) and the second heat exchange plate (2); characterized in that: The first heat exchange plate (1) comprises a plate body (3), a plurality of ribs (4) are provided on the plate body (3), and a plurality of flow channels are separated by the ribs (4); a diverter rib (5) is provided at the top of the rib (4) in the middle of the plate body (3), and a converging rib (6) is provided at the bottom of the rib (4) on both sides of the plate body (3); the diverter rib (5) and the converging rib (6) are both arc-shaped plates facing the center line direction of the plate body (3); The second heat exchange plate (2) has the same structure as the first heat exchange plate; the first heat exchange plate (1) and the second heat exchange plate (2) are alternately arranged, and the flow channels are perpendicular to each other; It also includes a plurality of headers (7) respectively covering both ends of the first heat exchange plate (1) and the second heat exchange plate (2), wherein a connection cavity (8) is provided inside the header (7), and the connection cavity (8) connects the flow passages of all the first heat exchange plates (1) and the flow passages of all the second heat exchange plates respectively; It also includes a connecting pipe (9) corresponding one-to-one to the connecting box (7), and the connecting pipe (9) is communicated with the connecting cavity (8).

2. A printed circuit board type heat exchanger according to claim 1, characterized in that: Connecting cavities (10) are left between the two ends of the rib plate (4) and the edges of the first heat exchange plate (1) and the second heat exchange plate (2), and the ends of the diverter ribs (5) and the converging ribs (6) are flush with the edges of the first heat exchange plate (1) and the second heat exchange plate (2).

3. The printed circuit board type heat exchanger according to claim 1, characterized in that: Both ends of the ribs (4) on the leftmost and rightmost sides of the first heat exchange plate (1) are provided with guide arc plates (12) that are inclined toward the central axis.

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