Cascade compact heat exchanger
By adopting multiple parallel heat exchange cores in a compact heat exchanger, the problems of low heat exchange efficiency and large fluid pressure loss in the prior art are solved, and efficient heat exchange performance is achieved.
Patent Information
- Application Number
- CN202421556053.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-02
AI Technical Summary
Existing compact heat exchangers have shortcomings in meeting large flow heat exchange, and connecting multiple compact heat exchangers in series will result in large fluid pressure losses.
Using a composite compact heat exchanger, through multiple parallel heat exchange cores, all first heat exchange channels jointly communicate with the first set of inlet and exit cavity, and all second heat exchange channels jointly communicate with the second set of inlet and exit cavity, thereby realizing the synchronous heat exchange of multiple heat exchange cores.
This design can effectively reduce the pressure loss of heat exchange fluid, meet the working needs of large flow heat exchange, and improve the heat exchange efficiency.
Smart Images
Figure CN223005397U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchange, in particular to a cascade type compact heat exchanger. Background Art
[0002] The size of the compact heat exchanger can be minimized to less than 10 cm 3 , and the compact heat exchanger includes a plurality of micro energy chips arranged in a stacked manner. There are micro-structured heat exchange channels between adjacent micro energy chips in the stack, and the interval between adjacent micro-structured heat exchange channels is thin, so the heat exchange performance is good. However, due to the small volume of this type of compact heat exchanger, a single compact heat exchanger cannot meet the working scenario of large-flow heat exchange. And the method of connecting multiple compact heat exchangers in series not only cannot solve the problem of how to meet large-flow heat exchange, but also will cause large pressure loss of the fluid due to the fluid flowing into the micro-structured channels multiple times. Therefore, there is an urgent need for a compact heat exchanger that can solve the problem of how to meet large-flow heat exchange. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a cascade type compact heat exchanger to solve the deficiencies in the prior art and be able to meet the working scenario of large-flow heat exchange.
[0004] To achieve one of the above purposes, the utility model provides a cascade type compact heat exchanger, including:
[0005] A housing provided with a plurality of connection holes;
[0006] A heat exchanger assembly located inside the housing, the heat exchanger assembly includes a plurality of heat exchange cores stacked along a first direction, and each heat exchange core includes a plurality of first heat exchange channels and second heat exchange channels alternately arranged with the first heat exchange channels along the first direction;
[0007] A shelf assembly including a plurality of shelves connected between the housing and the heat exchanger assembly, and the plurality of shelves divide the chamber between the heat exchanger assembly and the housing into a first group of inlet and outlet chambers communicating with all the first heat exchange channels and a second group of inlet and outlet chambers communicating with all the second heat exchange channels;
[0008] A part of the connection holes communicate with the first group of inlet and outlet chambers, and another part of the connection holes communicate with the second group of inlet and outlet chambers.
[0009] As a further improvement of an embodiment of the utility model, the uppermost heat exchange core is hermetically connected to the top plate, and the lowermost heat exchange core is hermetically connected to the bottom plate.
[0010] As a further improvement of an embodiment of the present utility model, both ends of the first heat exchange channels in all heat exchange cores are aligned, both ends of the second heat exchange channels in all heat exchange cores are aligned, there are 4 shelves provided, and the shelves are arranged between the ports of the first heat exchange channels and the second heat exchange channels.
[0011] As a further improvement of an embodiment of the present utility model, the housing includes a top plate, a bottom plate, and a fence provided between the top plate and the bottom plate. In a first direction, one end of the heat exchange core is hermetically connected to the top plate, and the other end of the heat exchange core is hermetically connected to the bottom plate.
[0012] As a further improvement of an embodiment of the present utility model, the heat exchange core is provided with a first card slot along the first direction, the inner wall of the fence is provided with a second card slot along the first direction, and the shelf is hermetically inserted and fitted between the first card slot and the second card slot.
[0013] As a further improvement of an embodiment of the present utility model, the top wall of the shelf is hermetically connected to the top plate, and the bottom wall of the shelf is hermetically connected to the bottom plate.
[0014] As a further improvement of an embodiment of the present utility model, the connection holes are provided on the top plate and / or the bottom plate and / or the fence, an access pipe is connected at the position of the connection holes, and the access pipe is communicated with the first group of access cavities or the second group of access cavities through the connection holes.
[0015] As a further improvement of an embodiment of the present utility model, the cross-sectional area of the connection holes is smaller than the cross-sectional areas of the first group of access cavities and the second group of access cavities.
[0016] As a further improvement of an embodiment of the present utility model, the ratio between the length L1 of the heat exchange core and the length L2 of the fence is 1:2 to 4.
[0017] As a further improvement of an embodiment of the present utility model, the ports of the first heat exchange channels and the ports of the second heat exchange channels are parallel to the side wall of the fence.
[0018] As a further improvement of an embodiment of the present utility model, the cross-section of the fence is rectangular or circular ring-shaped.
[0019] Compared with the prior art, the utility model adopts multiple parallel heat exchange cores, so that all the first heat exchange channels in the multiple heat exchange cores are jointly communicated with the first set of inlet and outlet cavities, and all the second heat exchange channels in the multiple heat exchange cores are jointly communicated with the second set of inlet and outlet cavities. Therefore, compared with a single heat exchange core, the multiple heat exchange cores in the utility model can carry out heat exchange work simultaneously, the heat exchange fluid will not enter the first heat exchange channel or the second heat exchange channel multiple times, and the pressure loss of the heat exchange fluid is small, which can meet the working requirements of large-flow heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is the front view of the cascade compact heat exchanger;
[0021] Figure 2 is the axonometric view of the cascade compact heat exchanger, showing the exploded state in the figure;
[0022] Figure 3 is Figure 1 the sectional view of part A-A in
[0023] Figure 4 is Figure 3 the schematic diagram of the hidden part of the shelf structure in
[0024] Figure 5 is the sectional view in the optional embodiment;
[0025] Figure 6 is Figure 5 the enlarged schematic diagram of the structure of part B in
[0026] Figure 7 is the axonometric view in the optional embodiment, showing the exploded state in the figure;
[0027] Figure 8 is the sectional view in the optional embodiment.
[0028] REFERENCE SIGNS:
[0029] 10, housing; 11, top plate; 12, bottom plate; 13, enclosure; 131, second card slot; 132, fixed seat; 14, connection hole; 21, shelf; 31, heat exchange core; 131, first card slot; 41, first set of inlet and outlet cavities; 42, second set of inlet and outlet cavities; 51, first set of inlet and outlet pipes; 52, second set of inlet and outlet pipes. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and should not be construed as limiting the utility model.
[0031] Spatial relative position terms such as "upper", "above", "lower", "below", "top", "bottom", etc. used in this embodiment are for the purpose of facilitating description of the relationship of one unit or feature relative to another unit or feature as shown in the drawings. For better understanding by those skilled in the art, a first direction is defined, and the first direction is the vertical direction, and the extending direction of the heat exchange chip is the horizontal direction. Depending on the usage and installation direction of the stacked compact heat exchanger, the spatial relative position terms may be intended to include different orientations other than the orientations shown in the figures.
[0032] Terms such as first and second in the present utility model are only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features; in addition, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, connection can be direct connection or indirect connection through an intermediate medium, and can be fixed connection, movable connection, detachable connection or integral connection. The term "sealed connection" should be understood in a broad sense. For example, sealed connection can be the close fit between components, or there is a sealing material or adhesive connection at the connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following combines the attached Figure 1 -8 in the embodiments of the present utility model to clearly and completely describe the technical solutions in the embodiments of the present utility model.
[0034] This embodiment provides a cascade compact heat exchanger. Referring to Figure 1 and Figure 2 , it includes a housing 10, a heat exchanger assembly and a shelf assembly arranged in the housing 10. The housing 10 includes a top plate 11, a bottom plate 12 disposed opposite to the top plate 11, and a surrounding wall 13 connected between the top plate 11 and the bottom plate 12. The surrounding wall 13 is arranged in a rectangular shape surrounding on all sides and hollow inside. The heat exchanger assembly is generally located at the central position of the surrounding wall 13 in the horizontal direction.
[0035] The height of the heat exchanger assembly in the first direction matches the height of the surrounding wall 13. The heat exchanger assembly includes a plurality of heat exchange cores 31 stacked in the first direction. The top of the uppermost heat exchange core 31 is hermetically connected to the top plate 11, and the bottom of the lowermost heat exchange core 31 is hermetically connected to the bottom plate 12.
[0036] The heat exchange core 31 includes a number of heat exchange chips stacked alternately in the first direction. Adjacent heat exchange chips are stacked and rotated at a preset angle to form a number of first heat exchange channels and a number of second heat exchange channels (not shown in the figure) that are alternately and crosswise with each other. The first heat exchange channels in all the heat exchange cores 31 are aligned in the horizontal and vertical directions, and the second heat exchange channels in all the heat exchange cores 31 are aligned in the horizontal and vertical directions.
[0037] Referring to Figure 2 and Figure 3 , the shelf assembly includes four shelves 21 arranged between the inner wall of the enclosure 13 and the heat exchange assembly. The four shelves 21 divide the chamber between the heat exchanger assembly and the enclosure 13 into a first set of access chambers 41 communicating with all the first heat exchange channels and a second set of access chambers 42 communicating with all the second heat exchange channels. One side wall of the shelf 21 is hermetically connected to the inner wall of the enclosure 13, and the other opposite side wall of the shelf 21 is hermetically connected to the heat exchange core 31. The height of the shelf 21 in the first direction matches the height of the enclosure 13. The top wall of the shelf 21 is hermetically connected to the top plate 11, and the bottom wall of the shelf 21 is hermetically connected to the bottom plate 12.
[0038] Connection holes 14 are respectively provided at the positions corresponding to the access chambers on the top plate 11, and access pipes are connected at the positions of the connection holes 14. Two opposite access pipes are grouped into a first group of access pipes 51 and a second group of access pipes 52. The first group of access pipes 51 communicates with the first set of access chambers 41, and the second group of access pipes 52 communicates with the second set of access chambers 42. There are two first group of access pipes 51, two second group of access pipes 52, two first set of access chambers 41, and two second set of access chambers 42 that are arranged oppositely.
[0039] The cross-sectional area of the access pipe is smaller than the cross-sectional area of the access chamber. The heat exchange fluid enters the access chamber from the access pipe, that is, from a small channel to a large channel, the flow rate of the fluid becomes smaller, and the flow pressure of the fluid becomes smaller, so that the heat exchange fluid flows smoothly from the access chamber into the first heat exchange channel and the second heat exchange channel for heat exchange.
[0040] During the fluid heat exchange working process, the first heat exchange fluid enters from the first group of access pipes 51 into the first set of access chambers 41 and then into the first heat exchange channel, and the second heat exchange fluid enters from the second group of access pipes 52 into the second set of access chambers 42 and then into the second heat exchange channel. After the first heat exchange fluid and the second heat exchange fluid exchange heat, the first heat exchange fluid then flows out to the outside through the opposite first set of access chambers 41 and the first group of access pipes 51, and the second heat exchange fluid flows out to the outside through the opposite second set of access chambers 42 and the second group of access pipes 52. In this embodiment, multiple heat exchange cores 31 are stacked in parallel, so that multiple heat exchange cores 31 perform heat exchange work synchronously, enabling the device to meet the working requirements of large-flow heat exchange.
[0041] Referring toFigure 3 and Figure 4 At the four corners of the heat exchanger assembly and the four inner corners of the enclosure 13 are in one-to-one correspondence. At the corner positions of the heat exchanger assembly, there are first card slots 311, and at the inner corner positions of the enclosure 13, there are second card slots 131. The shelf 21 is inserted and cooperated with the first card slots 311 and the second card slots 131. Sealing structures such as sealing strips can be provided at the connection positions of the shelf 21 with the first card slots 311 and the second card slots 131. Sealing pieces and other sealing structures can also be provided at the connection positions of the shelf 21 with the top plate 11 and the bottom plate 12 to seal and isolate the adjacent first group of access cavities 41 and the second group of access cavities 42.
[0042] The length L1 of the heat exchange core 31 in the horizontal direction is less than the length L2 of the enclosure 13. The ratio of the length L1 to the length L2 is: 1:2 - 4. When the length L1 of the heat exchange core 31 is 45 mm, the range of the length L2 of the enclosure 13 is: 90 - 180 mm. The difference between the length L2 of the enclosure 13 and the length L1 of the heat exchange core 31 should not be too small or too large. If the difference is too small, it is not only inconvenient for pipe connection, but also the cross-sectional area of the access cavity becomes smaller, resulting in pressure loss of the fluid; if the difference is too large, the space utilization rate is relatively low, and the larger volume of the access cavity will affect the temperature of the heat exchange fluid.
[0043] The wall thickness at the corner positions of the enclosure 13 is greater than that at other positions to increase the connection area between the shelf 21 and the enclosure 13, making the connection between the shelf 21 and the enclosure 13 more stable.
[0044] In an alternative embodiment, referring to Figure 5 and Figure 6 At the four corners of the heat exchanger assembly and the four inner corners of the enclosure 13 are not in one-to-one correspondence. On the inner side wall of the enclosure 13, there are fixed seats 132 protruding along the first direction. Along the first direction, the above-mentioned second card slots 131 are provided on the fixed seats 132. One side wall of the shelf 21 is in sealed insertion and cooperation with the first card slots 311 at the corner positions of the heat exchanger assembly, and the other opposite side wall of the shelf 21 is in sealed insertion and cooperation with the second card slots 131.
[0045] In an alternative embodiment, referring to Figure 7 and Figure 8 The enclosure 13 is arranged in a circular ring shape. On the inner side wall of the enclosure 13, there are fixed seats 132 protruding along the first direction. Along the first direction, the above-mentioned second card slots 131 are provided on the fixed seats 132. One side wall of the shelf 21 is in sealed insertion and cooperation with the first card slots 311 at the corner positions of the heat exchanger assembly, and the other opposite side wall of the shelf 21 is in sealed insertion and cooperation with the second card slots 131.
[0046] In an alternative embodiment, the housing 10 can be of other shapes, such as spherical. The side wall of the shelf 21 is shaped to match the inner wall of the housing 10. It is only necessary to divide the chamber between the heat exchanger assembly and the inner wall of the housing 10 into independent first group of inlet / outlet chambers 41 and second group of inlet / outlet chambers 42. There is no specific limitation in this embodiment.
[0047] In an alternative embodiment, the connection between the shelf 21, the enclosure 13 and the heat exchanger assembly can be by welding or adhesive bonding, as long as the relative sealing between the adjacent first group of inlet / outlet chambers 41 and second group of inlet / outlet chambers 42 is ensured.
[0048] In an alternative embodiment, the specific numbers of the shelf 21, the connection holes 14 and the inlet / outlet pipes vary according to the number of heat exchange channels in the heat exchange core 31. The shelf 21 can be set to 2 or 6, etc. Alternatively, according to the different stacking manners of several heat exchange cores 31, several shelves 21 or shelves 21 of different shapes are provided, as long as the first heat exchange channels in all the heat exchange cores 31 are connected to the same inlet / outlet chamber and the second heat exchange channels in all the heat exchange cores 31 are connected to the same inlet / outlet chamber. There is no specific limitation in this embodiment.
[0049] In an alternative embodiment, the connection holes 14 and the inlet / outlet pipes can be provided on the enclosure 13 and / or the bottom plate 12. For example, the first group of inlet / outlet pipes 51 are provided on the top plate 11 and the second group of inlet / outlet pipes 52 are provided on the bottom plate 12; or the first group of inlet / outlet pipes 51 are provided on the top plate 11 and the second group of inlet / outlet pipes 52 are provided on the enclosure 13.
[0050] In an alternative embodiment, multiple cascaded compact heat exchangers in the above embodiments can be provided in parallel. The inlet / outlet pipes of the same heat exchange fluid in multiple parallel structures are connected to the same fluid pipeline, and the above parallel structures can be freely combined according to the heat exchange flow rates of different requirements.
[0051] In an alternative embodiment, other connection structures, such as flexible connection seats, etc., can be hermetically connected to the top and bottom of the heat exchanger assembly and the shelf 21. The flexible connection seats are hermetically connected to the top plate 11 and the bottom plate 12, which is convenient for the assembly of the parallel structure and ensures the sealing performance.
[0052] The structure, features and effects of the present utility model have been described in detail based on the embodiments shown in the drawings. The above are only the preferred embodiments of the present utility model, but the present utility model is not limited to the scope defined by the drawings. Any changes made according to the concept of the present utility model, or modified into equivalent embodiments with equivalent changes, still within the spirit covered by the description and the drawings, shall fall within the protection scope of the present utility model.
Claims
1. A cascade compact heat exchanger, comprising: The housing (10) is provided with a plurality of connection holes (14); A heat exchanger assembly is located in the shell (10), characterized in that the heat exchanger assembly comprises a plurality of heat exchange cores (31) stacked along a first direction, the heat exchange cores (31) comprising a plurality of first heat exchange channels and second heat exchange channels arranged alternately with the first heat exchange channels along the first direction; A shelf assembly, comprising a plurality of shelves (21) connected between the shell (10) and the heat exchanger assembly, wherein the plurality of shelves (21) divide the chamber between the heat exchanger assembly and the shell (10) into a first group of inlet and outlet chambers (41) communicating with all first heat exchange channels, and a second group of inlet and outlet chambers (42) communicating with all second heat exchange channels; A portion of the connection holes (14) is in communication with the first group of inlet and outlet cavities (41), and another portion of the connection holes (14) is in communication with the second group of inlet and outlet cavities (42).
2. The cascade compact heat exchanger according to claim 1, characterized in that: The two ends of the first heat exchange channels in all the heat exchange cores (31) are aligned, and the two ends of the second heat exchange channels in all the heat exchange cores (31) are aligned. Four shelves (21) are provided, and the shelves (21) are provided between the ports of the first heat exchange channels and the second heat exchange channels.
3. The cascade compact heat exchanger according to claim 1 or 2, characterized in that: The shell (10) comprises a top plate (11), a bottom plate (12), and a baffle (13) arranged between the top plate (11) and the bottom plate (12); the heat exchange core (31) is sealedly connected to the top plate (11) at one end, and is sealedly connected to the bottom plate (12) at the other end.
4. The cascade compact heat exchanger according to claim 3, characterized in that: The heat exchange core (31) is provided with a first slot (311) along the first direction, the inner wall of the enclosure (13) is provided with a second slot (131) along the first direction, and the shelf (21) is sealed and plugged between the first slot (311) and the second slot (131).
5. The cascade compact heat exchanger according to claim 4, characterized in that: The top wall of the shelf (21) is sealed to the top plate (11), and the bottom wall of the shelf (21) is sealed to the bottom plate (12).
6. The cascade compact heat exchanger according to claim 3, characterized in that: The connection hole (14) is arranged on the top plate (11) and / or the bottom plate (12) and / or the enclosure (13); an inlet and outlet pipe is connected to the connection hole (14); the inlet and outlet pipe is connected to the first group of inlet and outlet chambers (41) or the second group of inlet and outlet chambers (42) through the connection hole (14).
7. The cascade compact heat exchanger according to claim 6, characterized in that: The cross-sectional area of the connecting hole (14) is smaller than the cross-sectional areas of the first group of inlet and outlet cavities (41) and the second group of inlet and outlet cavities (42).
8. The cascade compact heat exchanger according to claim 3, characterized in that: The ratio between the length L1 of the heat exchange core (31) and the length L2 of the enclosure (13) is 1:2-4.
9. The cascade compact heat exchanger according to claim 8, characterized in that: The port of the first heat exchange channel and the port of the second heat exchange channel are parallel to the side wall of the enclosure (13).
10. The cascade compact heat exchanger according to claim 3, characterized in that: The cross section of the enclosure (13) is rectangular or circular.