Multi-cavity heat exchange device and processing method

Abstract

A multi-cavity heat exchange device includes at least two heat exchange units, wherein the heat exchange unit includes an input plate and an output plate, wherein the sides of the input plate and the output plate are sealed and connected by a snap-fit ​​device, and a heat exchange cavity is formed between the pair of adjacent input plates and output plates. The multi-cavity heat exchange device of the present invention is to make a larger heat exchange cavity into multiple (at least 2) smaller heat exchange cavities, connect the smaller heat exchange cavities, convert the deformation between the two large plates into small deformation of multiple small plates, and add a pre-tightening force in the middle of the plate to reduce deformation and ensure long life and high reliability. It should be noted that the heat exchange plate of the present invention is not simply reduced in size, but for any traditional heat exchange plate, the size of the heat exchange plate of the present invention is reduced to a fraction or tens of its original and expected design size.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchange devices, and in particular relates to a multi-cavity heat exchange device and a processing method thereof. Background Art

[0002] The existing heat exchanger is composed of two parallel plates with a large area. The heat exchange plate has a large temperature gradient from the inlet to the outlet due to heat exchange with the combustion chamber. Figure 1 ; Due to the large area of ​​the heat exchange plate, there is no restraint on the outside of the plate, and the high air pressure inside the plate can easily cause the plate to burst from the middle.

[0003] In addition, the upper and lower plates of the heat exchanger of the conventional heat exchanger are welded or riveted on both sides, see Figure 1 , because the plate is too long, the weld is long and prone to air leakage, which places high demands on the process.

[0004] Therefore, the service life of existing heat exchangers is limited, and it is difficult for them to operate stably for a long time under working conditions such as in the field, and the manufacturing and maintenance costs are high. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and to provide a multi-cavity heat exchange device and a processing method, which can solve the problems of large temperature gradient and easy expansion and cracking of the existing heat exchanger.

[0006] The technical solution of the present invention is: a multi-cavity heat exchange device, including at least two heat exchange units, the heat exchange unit includes an input plate and an output plate, the sides of the input plate and the output plate are sealed and connected by a snap-fit ​​device, and a heat exchange cavity is enclosed between the pair of adjacent input plates and output plates.

[0007] Furthermore, in the heat exchange cavity, fins are provided on the inner walls of the input plate and the output plate.

[0008] Further, the fin is integrally formed with the input plate or the output plate; or, the fin is fixed to the input plate or the output plate.

[0009] Furthermore, the fin is a corrugated plate or a straight plate.

[0010] Furthermore, the snap-fitting device includes mutually parallel enclosure 1, enclosure 2 and side enclosure perpendicular thereto, the cross-sections of enclosure 1, enclosure 2 and side enclosure form a "concave" shape, and the edges of the input plate and output plate are embedded in the slots formed between enclosure 1, enclosure 2 and side enclosure.

[0011] Furthermore, screw holes are arranged on the tops of enclosure 1 and enclosure 2, and pressure heads are arranged on the outsides of the input plate and the output plate. One end of the pressure head fits the input plate or the output plate, and the other end fixes the crossbeam. Adjustment bolts are arranged on both ends of the crossbeam.

[0012] Furthermore, the plurality of heat exchange units are stacked, and sealing plates are arranged between the adjacent heat exchange units for sealing between the snap-fit ​​devices.

[0013] Furthermore, the cross section of the heat exchange device is rectangular, fan-shaped or cylindrical.

[0014] The processing method of the multi-cavity heat exchange device comprises the following steps:

[0015] S100), fixing the input plate or the output plate on the workbench of the 3D printer, starting the 3D printer with the fin model loaded, adjusting the printing direction and position, and printing the fins one by one;

[0016] or,

[0017] On the workbench, start the 3D printer with the input plate or output plate model loaded with fins, adjust the printing direction and position, and print the input plate and output plate with fins;

[0018] or,

[0019] The original plate is processed into an input plate and an output plate with fins by electric spark cutting, chemical etching or wire cutting;

[0020] S200), placing the input plate and the output plate opposite to each other, placing the fins in the heat exchange cavity, inserting the edges of the input plate and the output plate into the slots, and connecting an adjacent pair of input plates and output plates into one body;

[0021] S300), placing the pressure head against the outer walls of a pair of input plates and output plates, screwing the bolts on the crossbeam into the screw holes, and applying a predetermined pre-tightening force;

[0022] S400), repeat steps S200)-S300 to install other heat exchange units until all heat exchange units are stacked.

[0023] Furthermore, when the cross section of the heat exchange device is rectangular or fan-shaped, a sealing plate is provided between adjacent buckling devices for sealing.

[0024] The advantages of the present invention compared with the prior art are:

[0025] 1. The multi-cavity heat exchange device of the present invention is to make a large heat exchange cavity into multiple (at least 2) smaller heat exchange cavities, connect the smaller heat exchange cavities, convert the deformation between the two large plates into small deformation of multiple small plates, and add pre-tightening force in the middle of the plate to reduce deformation and ensure long life and high reliability. It should be noted that the heat exchange plate of the present invention is not simply reduced in size, but for any traditional heat exchange plate, the size of the heat exchange plate of the present invention is reduced to a fraction or a few tenths of its original and expected design size.

[0026] 2. The multi-cavity heat exchange device of the present invention has an increase in heat exchange cavities, which reduces the temperature gradient between adjacent plates. Figure 4 , reduce the air pressure in a single cavity and prevent bursting.

[0027] 3. The multi-cavity heat exchange device of the present invention adopts a multi-cavity heat exchange plate, which shortens the weld, simplifies the process and is not prone to air leakage.

[0028] 4. In the multi-cavity heat exchange device of the present invention, the pressure head applies pressure in a direction perpendicular to the heat exchange plate to prevent the heat exchange plate from bulging and deforming due to the air pressure, prevent expansion and cracking, thereby increasing the service life of the device and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the existing heat exchanger and the temperature distribution during operation;

[0030] Figure 2 It is a schematic structural diagram of a heat exchange unit in a multi-cavity heat exchange device of the present invention, in which the fins are corrugated plates;

[0031] Figure 3 It is a schematic structural diagram of a heat exchange unit in which the fins are straight plates in the multi-cavity heat exchange device of the present invention;

[0032] Figure 4 It is a schematic diagram of the end surface position structure of an embodiment of the multi-cavity heat exchange device of the present invention;

[0033] Figure 5 It is a schematic cross-sectional structure diagram of an embodiment of a multi-cavity heat exchange device of the present invention;

[0034] Figure 6 It is a schematic diagram of the end surface position structure of another embodiment of the multi-cavity heat exchange device of the present invention;

[0035] Figure 7 It is a schematic cross-sectional structure diagram of another embodiment of the multi-cavity heat exchange device of the present invention.

[0036] Reference numerals:

[0037] 10-input plate, 11-fin, 20-output plate, 30-fastening device, 31-enclosure one, 32-enclosure two, 33-side enclosure, 34-slot, 35-sealing plate, 40-pressure head, 41-crossbeam, 50-heat exchange cavity. DETAILED DESCRIPTION

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The technical means of the present invention is to make a larger heat exchange cavity into multiple (at least 2) smaller heat exchange cavities, connect the smaller heat exchange cavities, convert the deformation between the two large plates into small deformation of multiple small plates, and add a pre-tightening force in the middle of the plate to reduce deformation and ensure long life and high reliability. It should be noted that the heat exchange plate of the present invention is not simply reduced in size, but for any traditional heat exchange plate, the size of the heat exchange plate of the present invention is reduced to a fraction or tens of its original and expected design size. Specifically, Figure 2-7 As shown, a multi-cavity heat exchange device includes at least two heat exchange units, wherein the heat exchange unit includes an input plate 10 and an output plate 20, the sides of the input plate 10 and the output plate 20 are sealed and connected by a fastening device 30, and a heat exchange cavity 50 is enclosed between the pair of adjacent input plates 10 and output plates 20.

[0041] In the heat exchange cavity 50, fins 11 are provided on the inner walls of the input plate 10 and the output plate 20; the fins 11 are integrally formed with the input plate 10 or the output plate 20; or, the fins 11 are fixed to the input plate 10 or the output plate 20. Preferably, the fins 11 are wavy plates or straight plates. The fins 11 can increase the retention time of the gas in the heat exchange cavity, so that the gas can fully exchange heat.

[0042] like Figure 2-3As shown, the buckling device 30 includes a mutually parallel enclosure 1 31, an enclosure 2 32 and a side enclosure 33 perpendicular thereto. The cross-sections of the enclosure 1 31, the enclosure 2 32 and the side enclosure 33 form a "concave" shape, and the edges of the input plate 10 and the output plate 20 are embedded in the slots 34 formed between the enclosure 1 31, the enclosure 2 32 and the side enclosure 33. Screw holes are set on the tops of the enclosure 1 31 and the enclosure 2 32, and a pressure head 40 is set on the outside of the input plate 10 and the output plate 20. One end of the pressure head 40 is attached to the input plate 10 or the output plate 20, and the other end is fixed to the cross beam 41. Adjustment bolts are set at both ends of the cross beam 41. The adjustment bolts are threadedly connected to the screw holes to adjust the pre-tightening force of the pressure head on the input plate and the output plate.

[0043] Preferably, the plurality of heat exchange units are stacked, and sealing plates 35 are provided between the snap-fit ​​devices 30 to seal adjacent heat exchange units.

[0044] Preferably, the cross section of the heat exchange device is rectangular, sector-shaped or cylindrical. When the cross sections of the input plate 10 and the output plate 20 are circular, the buckling device 30 is a disc-shaped flange, see Figure 6 , 7 The enclosure 1 31 and the enclosure 2 32 are circular shells protruding from the flange end surface and parallel to each other. The two adjacent circular shells and the flange end surface form the slot 34. At this time, since the flange end surface is continuous and dense, it can play a sealing role and no additional sealing plate 35 is required. When installing the heat exchange plate, it is gradually installed from the axis to the outside. The input plate 10 and the output plate 20 in the present invention are both heat exchange plates.

[0045] Preferably, when the heat exchange device is configured to receive solar energy for heating, a portion of the outer surface of the heat exchange device that does not receive reflected light is covered with a water tank to mitigate heat loss.

[0046] Preferably, the multi-cavity heat exchange device of the present invention is suitable for heat exchange occasions such as photothermal and nuclear energy.

[0047] The processing method of the multi-cavity heat exchange device comprises the following steps:

[0048] S100), fix the input plate 10 or the output plate 20 on the workbench of the 3D printer, start the 3D printer with the fin model loaded, adjust the printing direction and position, and print the fins 11 one by one;

[0049] or,

[0050] On the workbench, start the 3D printer loaded with the input plate 10 or output plate 20 model with the fins 11, adjust the printing direction and position, and print the input plate 10 and output plate 20 with the fins 11;

[0051] or,

[0052] The original plate is processed by electric spark cutting, chemical etching or wire cutting to form an input plate 10 and an output plate 20 with fins 11;

[0053] S200), the input plate 10 and the output plate 20 are opposite to each other, the fin 11 is located in the heat exchange cavity 50, the edges of the input plate 10 and the output plate 20 are inserted into the slot 34, and the adjacent pair of input plates 10 and output plates 20 are connected as one;

[0054] S300), the pressure head 40 is pressed against the outer walls of a pair of input plates 10 and output plates 20, and the bolts on the crossbeam 41 are screwed into the screw holes to apply a predetermined pre-tightening force;

[0055] S400), repeat steps S200)-S300), install other heat exchange units until all heat exchange units are stacked.

[0056] Preferably, when the cross section of the heat exchange device is rectangular or sector-shaped, a sealing plate 35 is provided between adjacent snap-fit ​​devices 30 for sealing.

[0057] See also Figure 2 The heat exchange method is to heat the gas entering the heat exchange cavity 50 from the input plate 10 by heating the input plate 10, thereby achieving the purpose of heat exchange; the heated gas is output from the output plate 20. If the heat exchange unit is multi-layered, the gas output from the output plate 20 of the first layer continues to be heated by the heat exchange method of the first layer of heat exchange units until it is discharged from the last layer of heat exchange units. The method of heating the input plate 10 includes heating with heat energy collected by a solar energy collection device, heating with nuclear energy emission, etc.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-cavity heat exchange device, characterized in that: It comprises at least two heat exchange units, wherein the heat exchange units comprise an input plate and an output plate, the sides of the input plate and the output plate are sealed and connected by a buckling device, and a heat exchange cavity is enclosed between a pair of adjacent input plates and output plates; In the heat exchange cavity, fins are provided on the inner walls of the input plate and the output plate; The fin is integrally formed with the input plate or the output plate; or, The fin is fixed to the input plate or the output plate; The fin is a corrugated plate or a straight plate; The buckling device comprises a mutually parallel enclosure 1, an enclosure 2 and a side enclosure perpendicular thereto, the cross-sections of the enclosure 1, the enclosure 2 and the side enclosure form a "concave" shape, and the edges of the input plate and the output plate are embedded in the slots formed between the enclosure 1, the enclosure 2 and the side enclosure; Screw holes are arranged on the top of the enclosure 1 and the enclosure 2, and pressure heads are arranged on the outside of the input plate and the output plate. One end of the pressure head is attached to the input plate or the output plate, and the other end fixes the crossbeam. Adjustment bolts are arranged on both ends of the crossbeam.

2. The multi-cavity heat exchange device according to claim 1, characterized in that: The plurality of heat exchange units are stacked, and sealing plates are arranged between the adjacent heat exchange units for sealing between the buckling devices.

3. The multi-cavity heat exchange device according to claim 1, characterized in that: The cross section of the heat exchange device is rectangular, sector-shaped or cylindrical.

4. A method for processing the multi-cavity heat exchange device according to any one of claims 1 to 3, characterized in that: The steps include: S100), fixing the input plate or the output plate on the workbench of the 3D printer, starting the 3D printer with the fin model loaded, adjusting the printing direction and position, and printing the fins one by one; or, On the workbench, start the 3D printer with the input plate or output plate model loaded with fins, adjust the printing direction and position, and print the input plate and output plate with fins; or, The original plate is processed into an input plate and an output plate with fins by electric spark cutting, chemical etching or wire cutting; S200), placing the input plate and the output plate opposite to each other, placing the fins in the heat exchange cavity, inserting the edges of the input plate and the output plate into the slots, and connecting an adjacent pair of input plates and output plates into one body; S300), placing the pressure head against the outer walls of a pair of input plates and output plates, screwing the bolts on the crossbeam into the screw holes, and applying a predetermined pre-tightening force; S400), repeat steps S200)-S300 to install other heat exchange units until all heat exchange units are stacked.

5. The processing method of the multi-cavity heat exchange device according to claim 4, characterized in that: When the cross section of the heat exchange device is rectangular or sector-shaped, a sealing plate is provided between adjacent buckling devices for sealing.

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