CN212158292U

CN212158292U - Compact uniform transition interface of printed circuit board heat exchanger

Info

Publication number: CN212158292U
Application number: CN201921988471.2U
Authority: CN
Inventors: 高炜; 李红智; 杨玉; 张磊; 吴帅帅
Original assignee: Xian Thermal Power Research Institute Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-12-15
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses an even excessive interface of printed circuit board heat exchanger compact, the core comprises a plurality of heat transfer medium passageways, a plurality of cold medium passageway, upper and lower apron. The heat exchange of the printed circuit board is realized, the inlet and outlet of the cold side plate and the hot side plate are possibly different according to the difference of the upper position and the lower position of the plate on the whole heat exchanger, the opening of the inlet and the outlet of the plate at the position close to the circle center of the inlet and the outlet of the whole inlet and the outlet of the heat exchanger is the largest, the width of other positions is gradually reduced along with the width of the position of the inlet and the outlet of the connecting pipe, the transverse outlet of the plate beyond the connecting pipe is sealed, the plate can only enter the inlet and the outlet after being converged with other plate fluids through a longitudinal opening, the cold medium side.

Description

Compact uniform transition interface of printed circuit board heat exchanger

Technical Field

The utility model relates to a heat transfer device technical field, in particular to even excessive interface of printed circuit board heat exchanger compact.

Background

Printed circuit plate heat exchangers (PCHE) belong to the category of microchannel plate heat exchangers. The PCHE has the advantages of compact structure, high temperature resistance, heat transfer resistance, safety, reliability and the like, and is widely applied in the fields of refrigeration and air conditioning, petroleum and natural gas, nuclear industry, chemical industry, electric power industry and the like.

The heat exchange core body is a core component of the PCHE, and has the structural characteristics of a porous core body in appearance structure. The microchannels in the core provide flow channels for the heat transfer medium, while the matrix material (typically a sheet metal) in the core serves to transfer heat between the heat transfer medium and the heat storage medium. The PCHE core body mainly comprises the following processing technologies: firstly, the required micro-pore channels are processed on the metal sheet by using a (photo) chemical etching technology, and then a plurality of layers of metal sheets containing micro-channels are connected by using a diffusion welding technology to form a whole core body. The micro-channel heat exchanger processed by the diffusion welding technology has high strength, and the strength of a welding seam is equivalent to that of the body, so that the heat exchanger processed by the diffusion welding technology can bear heat transfer.

However, the PCHE heat exchanger is often applied to high pressure occasions, and the wall thickness of the inlet and outlet pipelines and the seal heads is very thick, so that an inlet and outlet seal head with a large volume is often needed, as shown in fig. 1, all the microchannel inlets and outlets are wrapped in the seal head, and the inlet and outlet pipelines are welded on the seal head. Therefore, the heat exchanger body is very small, but the end socket and the inlet and outlet pipelines are very large, so that the advantage of small volume of the PCHE heat exchanger is greatly reduced.

If the volume of the inlet and outlet end sockets can be reduced, and the fluid resistance is not increased as much as possible, the advantages of the PCHE heat exchanger can be greatly enhanced.

Disclosure of Invention

In order to solve the technical problem, the utility model aims to provide an even excessive interface of printed circuit board heat exchanger compact, the runner on this PCHE heat exchanger slab passes through metal etching processing, and the exit on the slab is through etching and cutting common processing, and the exit channel shape on every slab is probably different, makes up into the whole back of heat exchanger, and the whole exit of heat exchanger is circular on an ordinary scale, and circular parcel is within importing and exporting the pipeline internal diameter. Compared with the traditional PCHE heat exchanger, the end socket of the PCHE heat exchanger is processed by diffusion welding of the plate sheets, so that the end socket with larger volume is not required to be added, the volume is reduced, and the flowing direction of the original flow channel is kept as much as possible.

In order to realize the purpose, the utility model discloses a technical scheme is:

the utility model provides a uniform interface that passes of printed circuit board heat exchanger compact, includes apron 3, apron 3 divide into upper cover plate and lower apron, be provided with a plurality of cold medium passageways 1 and a plurality of hot medium passageway 2 between upper cover plate and the lower apron, cold and hot medium passageway arranges in turn, gives the cold medium with heat transfer from the hot medium, cold medium passageway 1 include cold medium passageway slab, cold medium passageway slab on be provided with cold side import and cold side export, hot medium passageway 2 on set up hot medium passageway slab, be provided with hot side import and hot side export on the hot medium passageway slab.

The cold side outlet and the hot side outlet are approximately circular in transition, so that inlet and outlet connecting pipes can be conveniently welded.

The cold medium channels 1 and the heat medium channels 2 are alternately arranged, and the inlet and outlet shapes of a pair of adjacent cold and heat medium channel plates are the same.

The inlet and outlet of the cold side and hot side plate are different according to the difference of the upper and lower positions of the plate on the whole heat exchanger, the opening of the inlet and outlet of the plate is the largest at the position close to the circle center of the inlet and outlet connecting pipe of the whole heat exchanger, the width of the other positions is decreased along with the decreasing of the position width of the connecting pipe, the transverse outlet of the plate beyond the connecting pipe is sealed, and the plate can only enter the inlet and outlet after being converged with other plate fluids through the longitudinal.

The inner diameters of inlet and outlet connecting pipes of the cold side and the hot side of the whole heat exchanger are determined according to the flow rate in the pipe, the flow rate in the pipe meets the design requirement of the resistance of the heat exchanger, and the inner diameter of a pipeline of the inlet and outlet connecting pipes is approximately equal to the sum of the flow cross sections of the cold side or the hot side.

The cold medium channel 1 and the heat medium channel 2 can be in various forms, and are straight channels, Z-shaped channels, S-shaped channels or airfoil-shaped channels.

A compact uniform transition interface preparation process of a printed circuit board heat exchanger is characterized in that when a plate of a heat exchange channel at a cold side and a hot side is processed, an inlet and outlet channel of each plate is cut on a smooth plate, the width of each plate is larger than that of an actual heat exchanger, and inlets and outlets of all the plates are wrapped in edges to ensure the strength of the plates; secondly, etching a corresponding flow on the surface of the plate by adopting a metal etching technology; stacking the etched plates in sequence and welding the stacked plates into a whole by using a diffusion welding technology; and finally, cutting the edges of the plate pieces to expose the inlet and outlet channels of the heat exchanger.

The utility model has the advantages that:

the inlet and outlet of the traditional PCHE heat exchanger plate are not reduced, and the width of the inlet and outlet is the same as that of the central flow passage, so that the inlet and outlet of the whole heat exchanger are rectangular, the thicker the plate is stacked, the longer the inlet and outlet of the whole heat exchanger is, and the longer the end socket is. The utility model discloses the exit of every slab all has excessively, makes up into the whole back of a heat exchanger, and the whole excessively be approximate circular for in the cold medium side of heat exchanger and the hot medium side entry and exit, under the prerequisite that the circulation sectional area kept unanimous, makes the head volume minimum to direct excessive being circular, having avoided welding into the head that a rectangle was imported and exported through cutting a plurality of circular pipeline combinations.

The utility model discloses the head is also accomplished through the diffusion welding processing of slab, need not the bigger head of additional volume, has reduced the volume. The flow direction of the original flow channel is kept as much as possible, and the resistance is reduced.

Drawings

Fig. 1 is a schematic structural view of a conventional PCHE heat exchanger.

FIG. 2 is a schematic diagram of a compact uniform transition interface PCHE heat exchanger core composition

FIG. 3 is a general schematic diagram of a compact uniform transition interface PCHE heat exchanger core.

FIG. 4 is a schematic overall flow diagram of a compact uniform transition interface PCHE heat exchanger.

Fig. 5 is a schematic view of a high temperature side plate.

FIG. 6 is a schematic view of a cryogenic side panel.

Fig. 7 is a schematic view of the plate beyond the inner diameter of the pipe diameter of the adapter.

Fig. 8 is a schematic view of the internal structure of the plate and the flow channels.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The inlet and outlet of the traditional PCHE heat exchanger plate are not reduced, and the width of the inlet and outlet is the same as that of the central flow passage, so that the inlet and outlet of the whole heat exchanger are rectangular, the thicker the plate is stacked, the longer the inlet and outlet of the whole heat exchanger is, and the longer the end socket is, as shown in figure 1.

As shown in fig. 2-8: a compact uniform transition interface of a printed circuit board heat exchanger comprises a plurality of cold medium channels 1, a plurality of heat medium channels 2, an upper cover plate and a lower cover plate 3, wherein as shown in figure 2, the transition of a cold medium side and a heat medium side inlet and outlet of the printed circuit board heat exchanger is approximately circular, as shown in figure 3, and is convenient for welding inlet and outlet connecting pipes, as shown in figure 4; the cold and hot medium channels are alternately arranged, the inlet and outlet of a pair of adjacent cold and hot medium channel plates are the same in shape, the inlet and outlet of the cold side plate and the hot side plate are possibly different according to the difference of the upper and lower positions of the plates on the whole heat exchanger, the opening of the inlet and outlet of the plate is the largest at the position close to the circle center of the inlet and outlet connecting pipe of the whole heat exchanger, the width of the plate at other positions is reduced with the reduction of the position width of the connecting pipe, the transverse outlet of the plate beyond the connecting pipe is sealed, and the plate can only enter;

the inner diameters of inlet and outlet connecting pipes of the cold side and the hot side of the whole heat exchanger are determined according to the flow rate in the pipe, the flow rate in the pipe meets the design requirement of the resistance of the heat exchanger, and the inner diameter of a pipeline of the inlet and outlet connecting pipes is approximately equal to the sum of the flow cross sections of the cold side or the hot side;

for example, if the centre of the take-over is located at the centre plate of the heat exchanger, the openings of the centre plate are largest, as shown in fig. 8 for the centre plate, and if the plates are closer to the heat exchanger edge, as shown in fig. 5 and 6, the openings are smaller, as shown in fig. 8 for the edge plate.

When processing the heat exchange channel plate at the cold and hot sides, firstly, cutting an inlet and outlet channel of each plate on a smooth plate, wherein the width of the plate is larger than that of an actual heat exchanger, and the inlet and outlet of all the plates are wrapped in the edge to ensure the strength of the plate, as shown in fig. 7; secondly, etching a corresponding flow channel on the surface of the plate by adopting a metal etching technology; stacking the etched plates in sequence and welding the stacked plates into a whole by using a diffusion welding technology; finally, cutting off the edges of the plates to expose the inlet and outlet channels of the heat exchanger, wherein the single plate is shown in figures 5 and 6.

Claims

1. The utility model provides a uniform interface that passes of printed circuit board heat exchanger compact, its characterized in that includes apron (3), apron (3) divide into upper cover plate and lower apron, be provided with a plurality of cold medium passageway (1) and a plurality of hot medium passageway (2) between upper cover plate and the lower apron, cold and hot medium passageway arranges in turn, gives the cold medium with heat transfer from the hot medium, cold medium passageway (1) including cold medium passageway slab, cold medium passageway slab on be provided with cold side import and cold side export, hot medium passageway (2) on set up hot medium passageway slab, be provided with hot side import and hot side export on the hot medium passageway slab.

2. The compact uniform transition interface of a printed circuit board heat exchanger as recited in claim 1 wherein said cold side outlet and said hot side outlet transition are approximately circular to facilitate welding inlet and outlet connections.

3. The compact uniform transition interface of a pcb heat exchanger as recited in claim 1, wherein the coolant channels (1) and the heat medium channels (2) are alternately arranged, and the inlet and outlet of a pair of adjacent coolant channel plates have the same shape.

4. The compact uniform transition interface of a printed circuit board heat exchanger as recited in claim 1, wherein the inlet and outlet of the cold side and hot side plate are different according to the difference of the upper and lower positions of the plate in the heat exchanger, the opening of the plate inlet and outlet is the largest at the position close to the circle center of the inlet and outlet connection pipe of the heat exchanger, the opening of the plate inlet and outlet decreases progressively with the decreasing width of the connection pipe at other positions, the transverse outlet of the plate beyond the connection pipe is sealed, and the plate can only enter the inlet and outlet after being merged with other plate fluids through the longitudinal opening.

5. The compact uniform transition interface of a printed circuit board heat exchanger according to claim 1, wherein the inner diameters of inlet and outlet connection pipes of the cold side and the hot side of the whole heat exchanger are determined according to the flow rate in the pipe, the flow rate in the pipe meets the design requirement of the resistance of the heat exchanger, and the inner diameter of a pipeline of the inlet and outlet connection pipes is approximately equal to the sum of the flow cross-sectional areas of the cold side and the hot side.

6. A compact uniform transition interface of a pcb heat exchanger according to claim 1 wherein the cold medium channel (1) and the hot medium channel (2) can be in various forms, such as straight channel, zigzag, S-shaped or airfoil type.