Assembling type heat exchange core body suitable for diffusion welding forming and forming method

Abstract

The invention provides a split mounting type heat exchange core suitable for diffusion welding forming and a forming method, and belongs to the technical field of heat exchange. The problems existing during diffusion welding forming of an existing special-shaped heat exchange core body are solved. The split mounting type heat exchange core comprises a plurality of heat exchange units, a supporting flat plate, a lower bottom plate and an upper cover plate, each heat exchange unit comprises a heat exchange plate, two collecting groove plates and two sealing side plates, the two collecting groove plates are arranged on the two sides of the heat exchange plate respectively, a heat exchange flow channel is communicated with a groove plate flow channel, and the two collecting groove plates are arranged on the two sides of the heat exchange plate respectively. The two sealing side plates are arranged on the two sides of a combination body of the heat exchange plates and the collecting groove plate respectively, the heat exchange units and the supporting flat plates are sequentially and alternately placed on the lower bottom plate, and the upper cover plate is placed on the uppermost supporting flat plate. The heat exchanger is mainly used.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange, and particularly relates to a split heat exchange core suitable for diffusion welding forming and a forming method thereof. Background Art

[0002] The core component of a printed circuit heat exchanger (PCHE) widely used in chemical industry, aerospace, and offshore drilling platforms - the heat exchange core is mainly formed by diffusion welding of hot and cold heat exchange plates. Most of the heat exchange plates are metal plates with micro-channels formed by etching or machining. The heat exchange plates are the individual heat exchange units mainly participating in the heat exchange process in the heat exchange core. Such heat exchange plates have certain requirements for the fluidity and cleanliness of the heat exchange medium. The processing cycle of the heat exchange plates is long, the processing cost is high, and the shape is relatively regular. Such heat exchange plates are not suitable for some heat exchangers with low requirements for the fluidity of the heat exchange medium, low cost, and short manufacturing cycle. Moreover, some specific heat exchangers also require heat exchange plates with irregular shapes, such as stamping plates, corrugated plates, comb-shaped plates, wavy corrugated plates, herringbone corrugated plates, asymmetric dot matrix plates, and other heat exchange plates with various irregular flow channel shapes. Due to their special shapes, when such irregular heat exchange plates are diffusion-welded into a heat exchange core, the contact area between the upper and lower layers of heat exchange plates is small, resulting in delamination of the diffusion-welded seams between layers, or the collapse of the channels of the heat exchange plates due to the lack of support between the two layers, or the poor welding of the non-channel parts of the heat exchange core during diffusion welding due to the lack of a structure for downward pressure transmission around the heat exchange core, ultimately resulting in unqualified diffusion welding quality of the heat exchange core and inability to meet the subsequent use requirements.

[0003] In some specific systems such as wind power heat exchange, solar power heat exchange, and liquid metal heat exchange, the heat exchange medium is special, and the layout space of the heat exchanger is limited, with special requirements for the layout shape, external dimensions, weight, and pipeline layout of the heat exchanger. Regular-shaped heat exchange plates and heat exchanger structures cannot meet the use requirements. Moreover, the fluidity of the heat exchange medium in such application scenarios is poor, and the heat exchanger has a low cost and a short manufacturing cycle. To solve the heat exchange requirements of such systems, it is necessary to study a new type of heat exchange unit assembly structure to replace the heat exchange unit structure participating in the heat exchange process in the original PCHE heat exchange core and solve the requirements of such specific heat exchangers for special-shaped and irregularly shaped heat exchange plates. Summary of the Invention

[0004] In view of this, the present invention aims to provide a split heat exchange core suitable for diffusion welding forming and a forming method thereof to solve the problems existing in the diffusion welding forming of the existing special-shaped heat exchange core.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A modular heat exchange core suitable for diffusion welding forming, which includes heat exchange units, support plates, a lower bottom plate and an upper cover plate. The number of heat exchange units is multiple, and each heat exchange unit includes a heat exchange plate, two collecting trough plates and two sealing side plates. A number of heat exchange channels are provided on the heat exchange plate, and trough plate channels matching the structure of the heat exchange channels are provided on the collecting trough plates. A trough is provided on the collecting trough plate, and the trough is communicated with all the trough plate channels. A heat exchange medium inlet and outlet are provided on the trough. The two collecting trough plates are respectively arranged on both sides of the heat exchange plate, and the heat exchange channels and the trough plate channels are communicated. The two sealing side plates are respectively arranged on both sides of the combination of the heat exchange plate and the collecting trough plates. The heat exchange units and the support plates are alternately placed above the lower bottom plate in sequence, and the upper cover plate is placed above the uppermost support plate.

[0006] Furthermore, the heat exchange plate has a special-shaped structure.

[0007] Furthermore, the heat exchange plate is a stamping formed plate, a corrugated plate, a comb-shaped plate, a wavy corrugated plate, a herringbone corrugated plate or an asymmetric dot matrix plate.

[0008] Furthermore, the sealing side plate has a convex-shaped structure.

[0009] Furthermore, the materials of the collecting trough plate and the sealing side plate are S30408.

[0010] Furthermore, the heat exchange channels of the multiple heat exchange units have the same or different directions.

[0011] Furthermore, the external shape of the modular heat exchange core is processed according to the use space.

[0012] Furthermore, a pressure-bearing component is arranged outside the modular heat exchange core, and the pressure-bearing component is welded to the heat exchange core to form a heat exchanger with a sealed heat exchange space.

[0013] The present invention also provides a forming method for a modular heat exchange core suitable for diffusion welding forming, which includes the following steps:

[0014] Step 1: Process the heat exchange plate, the collecting trough plate, the sealing side plate, the support plate, the lower bottom plate and the upper cover plate according to the drawings and the 3D model;

[0015] Step 2: Place the lower bottom plate on the platform, and place the heat exchange units composed of the heat exchange plate, the collecting trough plate and the sealing side plate on the lower bottom plate respectively according to the position requirements of the drawings;

[0016] Step 3: Place the support plate on the heat exchange unit, and then place other heat exchange units on the support plate;

[0017] Step 4: Repeat Step 3, arrange the heat exchange units and support plates in sequence according to the quantity required by the drawing, and then place the upper cover plate above the uppermost support plate;

[0018] Step 5: The assembled heat exchange core is fixed by spot welding and welded by diffusion welding according to the parameters.

[0019] Furthermore, after the diffusion welding is completed, the heat exchange core is processed to the corresponding size according to the working space, and then the pressure-bearing components are welded outside the heat exchange core to form a heat exchanger with a sealed heat exchange space.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention forms a heat exchange unit by three types of plates, namely heat exchange plates, collecting groove plates, and sealing edge plates. The collecting groove plates are provided with groove structures, and the flow channel structures of these plates can be adjusted according to the shapes of the special-shaped heat exchange plates. The collecting groove plates form flow-through channels, and the medium flows into the heat exchange core through these channels for heat exchange. When the heat exchange core is diffusion-welded, the collecting groove plates enable all the pressure energy to be transmitted downward, and form a rectangular space with the sealing edge plates. The sealing edge plates can not only limit the displacement of the special-shaped heat exchange plates to prevent uneven stress during the diffusion welding process, but also ensure the diffusion welding sealing strength at the outer edge of the heat exchange core.

[0021] The heat exchange core has multiple heat exchange units and support plates arranged in sequence. The support plates increase the contact area for diffusion welding of the special-shaped heat exchange plates. Then, thick plates are placed at the upper and lower ends, and after diffusion welding, a heat exchange core is formed. The heat exchange core can be processed to the required shape according to the use parameters and environment of the heat exchanger, and external pressure-bearing components are set according to the external pipeline dimensions and layout positions and welded to the formed heat exchange core to form a sealed heat exchange space.

[0022] When the space of the heat exchanger is irregular and the layout of the inlet and outlet pipelines is irregular, the assembly method of the internal special-shaped heat exchange plates can be adjusted to change the inlet and outlet positions of the hot and cold sides to meet the heat exchange requirements. It is also possible to set special-shaped heat exchange plates with different structures or forms on the hot and cold sides according to the requirements of the hot and cold media of the heat exchanger, which can meet the heat exchange requirements of heat exchangers under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of a heat exchange unit according to the present invention;

[0025] Figure 2 is a schematic diagram of the assembly of the flow cross-sections of two media according to the present invention;

[0026] Figure 3Schematic diagram of the assembled structure of a split heat exchange core suitable for diffusion welding forming according to the present invention;

[0027] Figure 4 Schematic diagram of diffusion welding of a split heat exchange core suitable for diffusion welding forming according to the present invention;

[0028] Figure 5 Schematic diagram of cutting a split heat exchange core suitable for diffusion welding forming according to actual needs according to the present invention;

[0029] Figure 6 Schematic diagram of the sealing side plate structure according to the present invention;

[0030] Figure 7 Schematic diagram of the collecting tank plate structure according to the present invention;

[0031] Figure 8 Schematic diagram of the support flat plate structure according to the present invention;

[0032] Figure 9 Schematic diagram of the heat exchange plate structure according to the present invention.

[0033] In the figure: 1 - heat exchange plate, 2 - collecting tank plate, 3 - sealing side plate, 4 - support flat plate, 5 - lower bottom plate, 6 - upper cover plate. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] See Figures 1-9 Describing this implementation mode, a split heat exchange core suitable for diffusion welding forming includes a heat exchange unit, a support flat plate 4, a lower bottom plate 5 and an upper cover plate 6. The number of the heat exchange units is multiple. Each heat exchange unit includes a heat exchange plate 1, two collecting tank plates 2 and two sealing side plates 3. A plurality of heat exchange channels are arranged on the heat exchange plate 1. A tank plate channel matching the structure of the heat exchange channel is arranged on the collecting tank plate 2. A channel is arranged on the collecting tank plate 2. The channel is communicated with all the tank plate channels. A heat exchange medium inlet and outlet is arranged on the channel. The two collecting tank plates 2 are respectively arranged on both sides of the heat exchange plate 1. The heat exchange channel and the tank plate channel are communicated. The two sealing side plates 3 are respectively arranged on both sides of the combination of the heat exchange plate 1 and the collecting tank plate 2. The heat exchange units and the support flat plate 4 are alternately placed above the lower bottom plate 5 in sequence. The upper cover plate 6 is placed above the uppermost support flat plate 4.

[0036] The heat exchange plate 1 has a special-shaped structure. The heat exchange plate 1 is a stamping plate, a corrugated plate, a comb-shaped plate, a wavy corrugated plate, a herringbone corrugated plate or an asymmetric dot matrix plate. The sealing edge plate 3 has a convex-shaped structure. The materials of the collecting tank plate 2 and the sealing edge plate 3 are S30408. The heat exchange flow channel directions of the multiple heat exchange units are the same or different. The assembled heat exchange core is processed into an outer shape according to the use space. A pressure-bearing component is arranged outside the assembled heat exchange core, and the pressure-bearing component is welded to the heat exchange core to form a heat exchanger with a sealed heat exchange space.

[0037] This embodiment provides a new type of assembled heat exchange core applicable to diffusion welding forming, which replaces the heat exchange unit structure participating in the heat exchange process in the original PCHE heat exchange core and is applicable to heat exchange plates with various irregular flow channel shapes, such as stamping plates, corrugated plates, comb-shaped plates, wavy corrugated plates, herringbone corrugated plates, asymmetric dot matrix plates, etc. This embodiment cannot list them all, and only the stamping plate is used to illustrate the specific structure.

[0038] A heat exchange unit is composed of three types of plates: the heat exchange plate 1, the collecting tank plate 2 and the sealing edge plate 3. The collecting tank plate 2 has a channel structure, and this plate flow channel structure can be adjusted according to the shape of the special-shaped heat exchange plate 1. The collecting tank plate 2 forms a flowable channel, and the medium flows into the heat exchange core through this channel for heat exchange. When the heat exchange core is diffusion-welded, the collecting tank plate 2 makes all the pressure energy transfer downward and forms a rectangular space with the sealing edge plate 3. The sealing edge plate 3 can not only limit the displacement of the special-shaped heat exchange plate 1 to prevent uneven stress during the diffusion welding process, but also ensure the diffusion welding sealing strength of the outer edge of the heat exchange core.

[0039] The heat exchange core has multiple heat exchange units and the support flat plate 4 are arranged in sequence. The support flat plate 4 increases the contact area for diffusion welding of the special-shaped heat exchange plate 1. Then, thick flat plates, namely the lower bottom plate 5 and the upper cover plate 6, are placed at the upper and lower ends. After diffusion welding, a heat exchange core is formed. The heat exchange core can be processed into the required outer shape according to the use parameters and environment of the heat exchanger, and external pressure-bearing components are set according to the external pipeline dimensions and layout positions and welded to the formed heat exchange core to form a sealed heat exchange space.

[0040] When the space of the heat exchanger is irregular and the layout of the inlet and outlet pipelines is irregular, the assembly method of the internal special-shaped heat exchange plate 1 can be adjusted to change the positions of the cold and hot side inlets and outlets to meet the heat exchange requirements. It is also possible to set special-shaped heat exchange plates 1 with different structures or forms on the cold and hot sides according to the requirements of the cold and hot media of the heat exchanger, which can meet the heat exchange requirements of heat exchangers under different working conditions.

[0041] This embodiment is a forming method for an assembled heat exchange core suitable for diffusion welding forming. This method is applicable to heat exchange plates 1 with various irregular flow channel shapes, such as stamping plates, corrugated plates, comb plates, wavy corrugated plates, herringbone corrugated plates, or asymmetric dot matrix plates, etc. This embodiment cannot list them all one by one. Only the stamping plate is used to illustrate the specific forming method. The forming method includes the following steps:

[0042] Step 1: Process the heat exchange plate 1, the collecting tank plate 2, the sealing edge plate 3, the support flat plate 4, the lower bottom plate 5, and the upper cover plate 6 according to the drawings and 3D models. Among them, the materials of the collecting tank plate 2 and the sealing edge plate 3 are S30408. Purchase the finished heat exchange plate 1, the support flat plate 4, the lower bottom plate 5, and the upper cover plate 6 according to the dimensions;

[0043] Step 2: Place the lower bottom plate 5 on the platform, and place the heat exchange units composed of the heat exchange plate 1, the collecting tank plate 2, and the sealing edge plate 3 on the lower bottom plate according to the position requirements of the drawings, as Figure 2 and Figure 3 shown;

[0044] Step 3: Place the support flat plate 4 on the heat exchange unit, and then place other heat exchange units on the support flat plate 4. The heat exchange flow channel directions of adjacent heat exchange units are different, as Figure 3 shown;

[0045] Step 4: Repeat Step 3 in the above order, arrange the heat exchange units and the support flat plate 4 in sequence according to the required quantity of the drawings, and then place the upper cover plate 6 above the uppermost support flat plate 4, as Figure 3 shown;

[0046] Step 5: The assembled heat exchange core is fixed by spot welding and welded by diffusion welding according to the parameters, as Figure 4 shown;

[0047] Step 6: After determining the size of the heat exchange core according to the working space of the heat exchanger, process it, as Figure 5 shown. The processed heat exchange core is welded to the external pressure-bearing components as required to form a heat exchanger with a sealed heat exchange space, and welding can form the entire heat exchanger.

[0048] The above-disclosed embodiments of the present invention are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well.

Claims

1. A assembled heat exchange core suitable for diffusion bonding forming, characterized in that: It includes a heat exchange unit, a support flat plate (4), a lower bottom plate (5) and an upper cover plate (6). The number of the heat exchange units is multiple. Each heat exchange unit includes a heat exchange plate (1), two collecting tank plates (2) and two sealing side plates (3). A plurality of heat exchange channels are arranged on the heat exchange plate (1). The collecting tank plates (2) are provided with tank plate channels matching the structures of the heat exchange channels. The collecting tank plates (2) are provided with channels, and the channels are communicated with all the tank plate channels. Heat exchange medium inlets and outlets are arranged on the channels. The two collecting tank plates (2) are respectively arranged on both sides of the heat exchange plate (1), and the heat exchange channels are communicated with the tank plate channels. The two sealing side plates (3) are respectively arranged on both sides of the combination of the heat exchange plate (1) and the collecting tank plates (2). The heat exchange units and the support flat plate (4) are alternately placed above the lower bottom plate (5) in sequence, and the upper cover plate (6) is placed above the uppermost support flat plate (4).

2. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: The heat exchange plate (1) is of a special-shaped structure.

3. The assembled heat exchange core suitable for diffusion bonding forming according to claim 2, characterized in that: The heat exchange plate (1) is a stamping formed plate, a corrugated plate, a comb-shaped plate, a wavy corrugated plate, a herringbone corrugated plate or an asymmetric dot matrix plate.

4. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: The sealing side plate (3) is of a convex-shaped structure.

5. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: The materials of the collecting tank plates (2) and the sealing side plates (3) are S30408.

6. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: The heat exchange channels of the multiple heat exchange units have the same or different directions.

7. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: The assembled heat exchange core is processed in shape according to the use space.

8. The assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: A pressure-bearing component is arranged outside the assembled heat exchange core, and the pressure-bearing component is welded to the heat exchange core to form a heat exchanger with a sealed heat exchange space.

9. A forming method of the assembled heat exchange core suitable for diffusion bonding forming according to claim 1, characterized in that: It includes the following steps: Step 1: Process the heat exchange plate (1), the collecting tank plates (2), the sealing side plates (3), the support flat plate (4), the lower bottom plate (5) and the upper cover plate (6) according to the drawings and the 3D model; Step 2: Place the lower bottom plate (5) on the platform, and place the heat exchange units composed of the heat exchange plate (1), the collecting tank plates (2) and the sealing side plates (3) on the lower bottom plate respectively according to the position requirements of the drawings; Step 3: Place the support flat plate (4) on the heat exchange unit, and then place other heat exchange units on the support flat plate (4); Step 4: Repeat Step 3, arrange the heat exchange units and the support flat plate (4) in sequence according to the required quantity in the drawings, and then place the upper cover plate (6) above the uppermost support flat plate (4); Step 5: The assembled heat exchange core is fixed by spot welding and welded by diffusion welding according to the parameters.

10. A forming method of the assembled heat exchange core suitable for diffusion bonding forming, characterized in that: After the diffusion welding is completed, the heat exchange core is processed to the corresponding size according to the working space, and then the pressure-bearing component is welded outside the heat exchange core to form a heat exchanger with a sealed heat exchange space.

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