CN219693947U - Efficient compact diffusion welding heat exchanger core - Google Patents

Abstract

The utility model discloses a high-efficiency compact diffusion welding heat exchanger core body, which comprises a first fluid plate, a plurality of layers of second fluid plates and a plurality of layers of middle plates, wherein after the first fluid plate, the second fluid plates and the middle plates are sequentially stacked, a radiator core body structure is formed through diffusion welding, holes between an upper layer plate and a lower layer plate are completely corresponding, the pressure born by different positions of the core body is relatively uniform during diffusion welding, the welding quality is high, the deformation of the size of a welded channel is small, and the diffusion welding quality of the core body is improved. The high-efficiency compact diffusion welding heat exchanger core body provided by the utility model can realize high-efficiency heat exchange of two or more fluids, is particularly suitable for heat exchange of working media with large channels on one side or large channels on both sides, and has better economic performance.

Description

Efficient compact diffusion welding heat exchanger core

Technical Field

The utility model belongs to the technical field of heat exchanger manufacturing, and particularly relates to a high-efficiency compact diffusion welding heat exchanger core body.

Background

The printed circuit board type heat exchanger is an efficient compact heat exchanger, has the characteristics of high heat exchange efficiency and high temperature and high pressure resistance, and has great application prospects in the fields of supercritical carbon dioxide power generation, ocean oil and gas platforms, nuclear power and the like. The cold and hot sides of the traditional printed circuit board type heat exchanger are etched semicircular channels with diameters of 0.1-2 mm, and the heat exchanger is suitable for clean gas or liquid working media. In the fields of nuclear power, photo-thermal power generation, flue gas recovery and the like, working media on one side of a heat exchanger can be liquid metal, molten salt, flue gas and the like, a large-size channel is needed to be adopted to prevent blockage, and the size of the flow channel cannot be increased due to the limitation of an etching process, so that a hybrid heat exchanger is designed in the prior art, wherein one side of the hybrid heat exchanger is provided with a large fin channel, and the other side of the hybrid heat exchanger is provided with an etching micro channel. However, as the side dimension of the fin of the hybrid heat exchanger is larger than that of the micro-channel, the diffusion welding difficulty is high, the welding defect is easy to generate, and the welded fin is seriously deformed; meanwhile, due to the special structure of the side of the fin, the side bearing capacity is low, the design pressure is generally required to be lower than 10MPa, and the fin cannot be suitable for working conditions with higher pressure.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a high-efficiency compact diffusion welding heat exchanger core body, which realizes high-efficiency heat exchange of two or more fluids and is particularly suitable for heat exchange of working media with a large channel on one side or large channels on both sides.

The utility model aims at realizing the technical scheme that the efficient compact diffusion welding heat exchanger core comprises a first fluid plate, a plurality of layers of second fluid plates and a plurality of layers of middle plates.

Wherein the first fluid sheets are arranged at an uppermost layer and a lowermost layer of the core structure, the plurality of layers of second fluid sheets are arranged between the uppermost layer of first fluid sheets and the lowermost layer of first fluid sheets, and the intermediate sheets are arranged between adjacent second fluid sheets.

The first fluid plate is provided with first fluid holes which are arranged at intervals, the second fluid plate is provided with first fluid holes and second fluid holes which are arranged at intervals, the side face of the first fluid plate is provided with an opening, and the middle plate is provided with first fluid holes and second fluid holes which are arranged at intervals.

The holes of the first fluid plate, the second fluid plate and the intermediate plate correspond exactly.

The first fluid holes on the uppermost first fluid plate are inlets of the first fluid channels and are used for guiding the first fluid to flow into the middle plate, and the first fluid holes on the lowermost first fluid plate are outlets of the first fluid channels and are used for guiding the first fluid to flow out of the middle plate.

The second fluid hole in the second fluid plate below the uppermost first fluid plate is an inlet to the second fluid channel for directing the second fluid to flow into the intermediate plate; the second fluid holes in the second fluid plate above the lowermost first fluid plate are outlets of the second fluid channels for guiding the second fluid out of the intermediate plate.

The first fluid plate, the second fluid plate and the first fluid holes in the intermediate plate together form a first fluid channel of the core structure.

The second fluid plate and the second fluid holes in the intermediate plate, as well as the openings in the sides of the second fluid plate, together form a second fluid channel of the core structure.

The first fluid holes and the second fluid holes on the intermediate plate are the main heat exchange sections of the first fluid channel and the second fluid channel of the heat exchanger core structure.

The central axes of the main heat exchange sections of the first fluid channel and the second fluid channel are parallel to each other and perpendicular to the plane of the plate.

Preferably, the radiator core structure is formed by diffusion welding after the first fluid sheet, the second fluid sheet and the intermediate sheet are stacked in order.

Preferably, the hole shapes on the first fluid sheet, the second fluid sheet and the intermediate sheet include, but are not limited to, circles, rectangles, triangles and diamonds.

Preferably, the sizes of the holes corresponding to the same flow channel on the intermediate plates of different layers can be designed to be gradually changed, so that the flow channel with gradually changed sizes is formed.

Preferably, in the core structure, the intermediate plates are all uniform in structural dimension.

Preferably, part or all of the intermediate sheets in the core structure are provided with reinforcing structures.

Preferably, the first and second fluid passages are internally provided with ribs to enhance heat transfer, the shape of the ribs including, but not limited to, triangular, rectangular and trapezoidal.

Preferably, the holes in the first fluid sheet, the second fluid sheet and the intermediate sheet may be machined by one or more methods including machining, stamping, etching, laser cutting, water cutting. =

Preferably, the sizes, the numbers and the positions of the first flow channels and the second flow channels are determined after thermal calculation according to the actual application working conditions of the products.

Compared with the prior art, the utility model has the following advantages:

according to the high-efficiency compact diffusion welding heat exchanger core, the holes between the upper plate sheet and the lower plate sheet are completely corresponding, so that the pressure born by different positions of the core is uniform during diffusion welding, the welding quality is high, and meanwhile, the deformation of the welded channel is small, so that the diffusion welding quality of the core is improved.

The shape of the flow channel of the large channel can be processed by adopting methods such as stamping, laser cutting, machining and the like, so that the limitation of etching size is avoided, the size can be completely determined according to actual requirements, and the risk of flow channel blockage is reduced.

According to the utility model, each plate is processed in the plane where the plate is located, and the reinforced ribs can be conveniently processed in the flow channel no matter the plate is processed, etched or cut, so that the heat convection coefficient and the equipment compactness are improved, and the heat transfer in the channel can be reinforced.

According to the utility model, the large channel side is designed into a circular structure and the like, so that the bearing capacity of the large channel side is improved, and the application range of the equipment is enlarged.

Most of the plates and structures in the utility model can be processed by adopting the means of economic and rapid machining or cutting with small environmental pollution, so that the problems of long processing period, serious environmental pollution and the like faced by photochemical etching are avoided, the manufacturing cost is reduced, and the utility model has better economic performance.

Drawings

FIG. 1 is a schematic perspective view of a first fluid sheet according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second fluid sheet in a three-dimensional configuration according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of an intermediate plate according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a core according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a cross-section of a core in an embodiment of the utility model;

FIG. 6 is a schematic view of an intermediate panel reinforcement structure according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the internal ribs of a flow channel in an embodiment of the utility model.

In the figure, 1 is a first fluid plate; 2 is a first fluid aperture; 3 is a second fluid plate; 4 is a second fluid aperture; 5 is an intermediate plate; 6 is a heat exchanger core; 7 is a first fluid channel; 8 is a second fluid channel; 9 is a second fluid outlet; 10 is a second fluid inlet; 11 is an intermediate panel reinforcing structure; 12 are ribs inside the flow channel.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

The utility model provides a high-efficiency compact diffusion welding heat exchanger core body, which is characterized in that: the heat exchanger core comprises a first fluid plate 1, a plurality of second fluid plates 3 and a plurality of intermediate plates 5;

wherein the first fluid sheets 1 are arranged in the uppermost and lowermost layers of the core structure, the plurality of second fluid sheets 3 are arranged between the uppermost first fluid sheet 1 and the lowermost first fluid sheet 1, and the intermediate sheet 5 is arranged between adjacent second fluid sheets 3.

The first fluid plate 1 is provided with first fluid holes 2 which are arranged at intervals, the second fluid plate 3 is provided with first fluid holes 2 and second fluid holes 4 which are arranged at intervals, the side face is provided with an opening, and the middle plate 5 is provided with first fluid holes 2 and second fluid holes 4 which are arranged at intervals.

The holes of the first fluid plate 1, the second fluid plate 3 and the intermediate plate 5 correspond exactly.

The first fluid hole 2 on the first fluid plate 1 located at the uppermost layer is an inlet of the first fluid channel 7, and is used for guiding the first fluid to flow into the middle plate 5, and the first fluid hole 2 on the first fluid plate 1 located at the lowermost layer is an outlet of the first fluid channel 7, and is used for guiding the first fluid to flow out of the middle plate 5.

The second fluid holes 4 in the second fluid plate 3, which are located below the uppermost first fluid plate 1, are inlets 9 of the second fluid channels 8 for guiding the second fluid into the intermediate plate 5; the second fluid holes 4 in the second fluid plate 3 above the lowermost first fluid plate 1 are outlets 10 of the second fluid channels 8 for guiding the second fluid out of the intermediate plate 5.

The first fluid plate 1, the second fluid plate 3 and the first fluid holes 2 in the intermediate plate 5 together constitute a first fluid channel 7 of the core structure.

The second fluid plate 3 and the second fluid holes 4 in the intermediate plate 5, as well as the openings in the sides of the second fluid plate 3, together form a second fluid channel 8 of the core structure.

The first and second fluid holes 2, 4 in the intermediate plate 5 constitute the main heat exchanging sections of the first and second fluid channels 7, 8 of the heat exchanger core structure.

The central axes of the main heat exchange sections of the first fluid channel 7 and the second fluid channel 8 are parallel to each other and perpendicular to the plane of the plate.

The heat exchanger core provided in the technical scheme of the utility model is further described by taking a large channel as a first fluid flow channel and a small channel as a second fluid flow channel:

as shown in fig. 1 to 5, the present example provides a heat exchanger core 6, the heat exchanger core 6 comprising a first fluid plate 1, a number of layers of second fluid plates 3 and a number of layers of intermediate plates 5.

Specifically, the first fluid plate 1 is disposed at the uppermost layer of the core 6, on which the first fluid holes 2 are provided, and an inlet portion of the first fluid channel 7 is formed, functioning to guide the first fluid to flow into the intermediate plate 5; at the same time, the first fluid plate 1 is also arranged at the lowest level of the core 6, on which the first fluid holes 2 are arranged, forming the outlet portion of the first fluid channel 7, functioning to guide the first fluid out of the intermediate plate 5, both together with the first fluid holes 2 on the intermediate plate 5 forming the complete first fluid channel 7.

The second fluid plate 3 is arranged below the uppermost first fluid plate 1, and is provided with a flow channel and a second fluid hole 4 thereon, and an inlet 9 portion of a second fluid channel 8 is formed to serve as a guide for the second fluid to flow into the intermediate plate 5; the second fluid plate 3 is also arranged above the first fluid plate 1 at the lowest layer, and is provided with a flow channel and a second fluid hole 4, which play a role in guiding the second fluid to flow out of the intermediate plate 5, and the two together with the second fluid hole 4 on the intermediate plate 5 form a complete second fluid channel 8. The second fluid plate 3 is provided with first fluid holes 2 so that the first fluid passes through the second fluid plate 3 to form a complete flow path.

The intermediate plate 5 is arranged between the second fluid plates 3, forming the main heat exchanging sections of the first and second fluid channels 7, 8 of the heat exchanger core 6 by the upper first and second fluid holes 2, 4.

In the present embodiment, the core 6 is formed by diffusion welding after the first fluid sheet 1, the second fluid sheet 3, and the intermediate sheet 5 are stacked in this order. The first fluid flows vertically downwards from above the core 6 along the first fluid channel 7, and the second fluid flows vertically upwards along the second fluid channel 8 after entering the core 6 from the second fluid inlet 10, and then flows out of the core 6 from the second fluid outlet 9. As shown in fig. 5, a complete first fluid channel 7 and second fluid channel 8 are shown, both of which achieve countercurrent heat exchange.

In one embodiment of the present utility model, the cross-sectional shape of the first fluid hole 2 and the second fluid hole 4 may be any shape such as circular, rectangular, triangular, diamond, etc., and may be machined by machining, stamping, etching, laser cutting, water cutting, etc. The flow channel with corresponding shape can be formed by adjusting the cross section shape, and the characteristics of the cold and hot side working medium are combined, so that the structure of the heat exchanger is more compact.

In one embodiment of the utility model, as shown in fig. 6, the intermediate plate 5 may be replaced, in part or in whole, by a reinforcing structure intermediate plate 11. When the second fluid flows to the middle plate 11 of the strengthening structure, the cavity formed above the plate increases the turbulence intensity of the fluid, and simultaneously, the fluid flow can be uniformly distributed again, so that the heat transfer effect of the device is improved.

As shown in fig. 7, in one embodiment of the present utility model, the ribs 12 may be machined inside the first fluid channel 7 to enhance heat transfer, and the ribs 12 may have a triangular, rectangular, trapezoidal shape, etc., and the presence of the ribs may further enhance heat exchange efficiency.

The sizes of the holes corresponding to the same flow channel on the intermediate plates 5 of different layers can be designed into a gradual change mode, and the gradual change flow channel is formed by changing the sizes of the different intermediate plates 5 on the same flow channel, so that the complicated flow heat transfer problem can be adapted.

In one embodiment of the utility model, the intermediate plates 5 are all of uniform structural dimensions in the core structure to facilitate manufacture of the device.

In the above examples, the number of plates and the flow passage form are simplified, but the present utility model is not limited thereto and needs to be set according to actual needs. In practice, the number of the first fluid channels 7 and the second fluid channels 8, the number of the plates, the flow channel orientations, etc. can be adjusted according to different working requirements, and the fluid passing through the first fluid channels 7 and the second fluid channels 8 is not limited, i.e. the first fluid channels 7 and the second fluid channels 8 can both be used for running high-temperature fluid or low-temperature fluid. In addition, the size and shape of the fluid channel are not limited, and the fluid channel may be designed according to the actual application scenario.

It is to be noted that all terms used for directional and positional indication in the present utility model, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "low", "tail", "head", "center", etc. are merely used to explain the relative positional relationship, connection, etc. between the components in a particular state, and are merely for convenience of description of the present utility model, and do not require that the present utility model must be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing is a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model.

Claims (7)

1. A high-efficient compact diffusion welding heat exchanger core, its characterized in that: the heat exchanger core comprises a first fluid plate (1), a plurality of second fluid plates (3) and a plurality of intermediate plates (5);

wherein the first fluid sheets (1) are arranged at the uppermost and lowermost layers of the core structure, a plurality of layers of the second fluid sheets (3) are arranged between the uppermost layer of the first fluid sheets (1) and the lowermost layer of the first fluid sheets (1), and the intermediate sheets (5) are arranged between adjacent second fluid sheets (3);

the first fluid plate (1) is provided with first fluid holes (2) which are arranged at intervals, the second fluid plate (3) is provided with the first fluid holes (2) and the second fluid holes (4) which are arranged at intervals, the side face of the first fluid plate is provided with an opening, and the middle plate (5) is provided with the first fluid holes (2) and the second fluid holes (4) which are arranged at intervals;

the holes of the first fluid plate (1), the second fluid plate (3) and the middle plate (5) are completely corresponding;

wherein the first fluid hole (2) on the uppermost first fluid plate (1) is an inlet of a first fluid channel (7) for guiding a first fluid to flow into the intermediate plate (5), and the first fluid hole (2) on the lowermost first fluid plate (1) is an outlet of the first fluid channel (7) for guiding a first fluid to flow out of the intermediate plate (5);

-said second fluid holes (4) in said second fluid plate (3) below the uppermost said first fluid plate (1) are inlets (10) of a second fluid channel (8) for guiding a second fluid into said intermediate plate (5); -said second fluid holes (4) in said second fluid plate (3) above the lowermost first fluid plate (1) are outlets (9) of said second fluid channels (8) for guiding a second fluid out of said intermediate plate (5);

the first fluid plate (1), the second fluid plate (3) and the first fluid holes (2) on the intermediate plate (5) together form a first fluid channel (7) of the core structure;

the second fluid holes (4) on the second fluid plate (3) and the middle plate (5) and the openings on the side surfaces of the second fluid plate (3) together form a second fluid channel (8) of the core structure;

the first fluid holes (2) and the second fluid holes (4) on the intermediate plate (5) are main heat exchange sections of the first fluid channels (7) and the second fluid channels (8) of the heat exchanger core structure;

the central axes of the main heat exchange sections of the first fluid channel (7) and the second fluid channel (8) are parallel to each other and are perpendicular to the plane of the plate.

2. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: and after the first fluid plate (1), the second fluid plate (3) and the middle plate (5) are sequentially stacked, a radiator core structure is formed through diffusion welding.

3. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: the hole shapes on the first fluid plate (1), the second fluid plate (3) and the intermediate plate (5) include, but are not limited to, circles, rectangles, triangles and diamonds.

4. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: the sizes of the holes corresponding to the same flow passage on the intermediate plate (5) of different layers can be designed to be gradually changed.

5. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: in the core structure, the intermediate plates (5) are all uniform in structural dimensions.

6. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: part or all of the intermediate sheets in the core structure are provided with reinforcing structures (11).

7. A high efficiency compact diffusion welded heat exchanger core as set forth in claim 1 wherein: the first fluid channel (7) and the second fluid channel (8) are internally provided with ribs (12), the shape of the ribs (12) including, but not limited to, triangular, rectangular and trapezoidal.