Cascade compact heat exchanger

Abstract

The utility model discloses a cascade type compact heat exchanger which comprises a heat exchanger assembly, the heat exchanger assembly comprises a plurality of heat exchange core bodies stacked in the first direction, each heat exchange core body comprises a heat exchange area, the heat exchange area is provided with a plurality of first heat exchange channels and second heat exchange channels, and the first heat exchange channels and the second heat exchange channels are alternately arranged in the first direction; the communicating pipe set is connected to the outer edge of the heat exchanger assembly and comprises a first pipe set communicating with all the first heat exchange channels and a second pipe set communicating with all the second heat exchange channels. Compared with the prior art, the parallel heat exchange core bodies are adopted, compared with a single heat exchange core body, the multiple heat exchange core bodies can conduct heat exchange work at the same time, heat exchange fluid cannot enter the first heat exchange channel or the second heat exchange channel many times, the pressure loss of the heat exchange fluid is small, and the work requirement for large-flow heat exchange can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a cascade compact heat exchanger. Background Art

[0002] The size of a compact heat exchanger can be as small as less than 10 cm 3 , and this kind of compact heat exchanger includes several micro energy chips arranged in a stacked manner. There are micro-structured heat exchange channels between adjacent stacked micro energy chips. The interval between adjacent micro-structured heat exchange channels is thin, and the heat exchange performance is good. However, due to the small volume of this kind 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 solves 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 compact heat exchanger to solve the deficiencies in the prior art.

[0004] To achieve one of the above purposes, the utility model provides a cascade compact heat exchanger, including:

[0005] A heat exchanger assembly, the heat exchanger assembly includes several heat exchange cores stacked along a first direction. The heat exchange core includes a heat exchange area, and the heat exchange area is provided with several first heat exchange channels and second heat exchange channels alternately arranged with the first heat exchange channels along the first direction;

[0006] A connecting pipe group, connected to the outer edge of the heat exchanger assembly. The connecting pipe group includes a first pipe group connected to all the first heat exchange channels and a second pipe group connected to all the second heat exchange channels.

[0007] As a further improvement of an embodiment of the utility model, the heat exchange core further includes several connection areas arranged on the outer edge of the heat exchange area, and both the first pipe group and the second pipe group are connected to the connection areas.

[0008] As a further improvement of an embodiment of the utility model, the outer edges of all the heat exchange cores are flush. The first pipe group and the second pipe group both include two groups of bottom plates and flow-through pipes connected to the bottom plates, and adjacent flow-through pipes are arranged at intervals.

[0009] As a further improvement of an embodiment of the utility model, the heat exchanger assembly is provided with a card slot along the first direction, and the flow-through pipe is connected to the card slot.

[0010] As a further improvement of an embodiment of the present utility model, the flow-through pipe group further includes side plates connected between adjacent flow-through pipes, and the side plates are connected to the connection area and the bottom plate.

[0011] As a further improvement of an embodiment of the present utility model, the side plates are provided with mounting grooves along the first direction, and the outer edge shape of the mounting grooves matches the outer edge shape of the connection area.

[0012] As a further improvement of an embodiment of the present utility model, the first pipe group and the second pipe group further include two top plates corresponding to the positions of the flow-through pipes, and connection holes corresponding to the flow-through pipes are provided on the top plate and / or the bottom plate.

[0013] As a further improvement of an embodiment of the present utility model, the flow-through pipe includes a protruding portion and a connecting portion connected to the protruding portion and extending toward the heat exchanger assembly, and the wall surface of the protruding portion is an arc surface;

[0014] Or, the inner diameter R1 of the protruding portion is greater than the diameter R2 of the connection hole.

[0015] As a further improvement of an embodiment of the present utility model, step grooves are provided at both ends of the flow-through pipe along the first direction, and the top plate and the bottom plate are respectively connected to the step grooves at both ends of the flow-through pipe.

[0016] As a further improvement of an embodiment of the present utility model, an inlet / outlet pipe is connected to the connection hole, and the inlet / outlet pipe is communicated with the flow-through pipe through the connection hole.

[0017] Compared with the prior art, the present utility model adopts a plurality of parallel heat exchange cores, so that all the first heat exchange channels in the plurality of heat exchange cores are commonly communicated with the first pipe group, and all the second heat exchange channels in the plurality of heat exchange cores are commonly communicated with the second pipe group. Therefore, compared with a single heat exchange core, the plurality of heat exchange cores in the present utility model can perform 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

[0018] Figure 1 is an axonometric view of a cascade compact heat exchanger in this embodiment;

[0019] Figure 2 is a front view of a cascade compact heat exchanger in this embodiment;

[0020] Figure 3 is Figure 2 a sectional view of part A-A in

[0021] Figure 4Yes Figure 2 A sectional view taken along line B-B in

[0022] Figure 5 Yes Figure 4 A partial structural schematic diagram in

[0023] Figure 6 Yes Figure 3 An enlarged schematic diagram of the structure at position C in

[0024] Figure 7 Yes Figure 3 An enlarged schematic diagram of the structure at position D in

[0025] Figure 8 A front view of a cascade compact heat exchanger in an alternative embodiment;

[0026] Figure 9 Yes Figure 8 A sectional view taken along line E-E in

[0027] Reference numerals:

[0028] 11, heat exchange core; 111, heat exchange area; 112, connection area; 113, end plate; 114, card slot; 21, first tube group; 22, second tube group; 211, top plate; 212, bottom plate; 213, flow-through tube; 214, protruding part; 215, connecting part; 216, connecting hole; 217, first step groove; 218, second step groove; 23, side plate; 231, installation groove; 31, first group of inlet / outlet chambers; 32, second group of inlet / outlet chambers; 41, first group of inlet / outlet pipes; 42, second group of inlet / outlet pipes. Detailed implementation manners

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Spatial relative position terms such as "top" and "bottom" used in this embodiment are for the purpose of facilitating description of the relationship between one unit or feature and another unit or feature as shown in the accompanying 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 different usage and installation directions of the stacked compact heat exchanger, the spatial relative position terms may be intended to include different orientations other than those shown in the figures.

[0031] The terms "first", "second", etc. in the present utility model are only used 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, the connection can be a direct connection or an indirect connection through an intermediate medium, and can be a fixed connection, a movable connection, a detachable connection, or an integral connection. The term "sealed connection" should be understood in a broad sense. For example, the sealed connection can be a tight 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.

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following clearly and completely describes the technical solutions in the embodiments of the present utility model in conjunction with the attached Figure 1 -9.

[0033] This embodiment provides a cascade compact heat exchanger. Referring to Figure 1 - Figure 3 It includes a heat exchanger assembly and a connecting pipe group arranged on the outer edge of the heat exchanger assembly. Both the heat exchanger assembly and the connecting pipe group extend along the first direction. The heat exchanger assembly includes a plurality of heat exchange cores 11 stacked along the first direction.

[0034] Referring to Figure 4 the heat exchange core 11 includes a heat exchange area 111 and a connection area 112 arranged on the outer edge of the heat exchange area 111. The connecting pipe group is connected to the connection area 112.

[0035] Referring to Figure 3 the heat exchange core 11 includes two end plates 113 and a plurality of heat exchange chips alternately stacked along the first direction and located between the two end plates 113. The adjacent heat exchange chips are stacked by rotating at a preset angle to form a plurality of first heat exchange channels and a plurality of second heat exchange channels (not shown in the figure) that are alternately and crosswise. All the heat exchange cores 11 are aligned in the horizontal and vertical directions, and the first heat exchange channels in all the heat exchange cores 11 are aligned in the horizontal and vertical directions, and the second heat exchange channels in all the heat exchange cores 11 are aligned in the horizontal and vertical directions.

[0036] The connecting tube group includes a first tube group 21 and a second tube group 22. The first tube group 21 forms a first group of inlet and outlet cavities 31, and the second tube group 22 forms a second group of inlet and outlet cavities 32. All first heat exchange channels are connected to the first group of inlet and outlet cavities 31, and all second heat exchange channels are connected to the second group of inlet and outlet cavities 32. The first heat exchange fluid and the second heat exchange fluid are transmitted through the first tube group 21 and the second tube group 22, respectively, which can meet the working scene requiring large flow heat exchange.

[0037] Reference Figure 3 - Figure 5 The first tube group 21 and the second tube group 22 each include two groups of tubes, the tubes include a top plate 211, a bottom plate 212, and a flow pipe 213 sealed between the top plate 211 and the bottom plate 212. The flow pipe 213 includes an integrally connected protruding portion 214 and a connecting portion 215. The connecting portion 215 is arranged on the side of the protruding portion 214 facing the heat exchange core 11, and the connecting portion 215 is sealed and connected to the connecting area 112. The heat exchange core 11 is provided with a card slot 114 at the position of the connecting area 112, and the connecting portion 215 is sealed and plugged with the card slot 114.

[0038] The wall surface of the protruding portion 214 is set in an arc shape, and the protruding portion 214 is a broken ring structure from the cross section of the through-flow tube 213. Of course, the wall surface of the protruding portion 214 can also be set in a curved or folded shape, which is not specifically limited in this embodiment.

[0039] The top plate 211 is provided with a connection hole 216, and an inlet and outlet pipe is connected at the position of the connection hole 216. The two opposite inlet and outlet pipes form a group, which is divided into a first group of inlet and outlet pipes 41 and a second group of inlet and outlet pipes 42. The first group of inlet and outlet pipes 41 is connected to the first pipe group 21, and the second group of inlet and outlet pipes 42 is connected to the second pipe group 22.

[0040] In an optional embodiment, the connection holes 216 may be provided on the bottom plate 212; or, the connection holes 216 corresponding to the first tube group 21 are provided on the top plate 211, and the connection holes 216 corresponding to the second tube group 22 are provided on the bottom plate 212; or, only the connection holes 216 corresponding to the first tube group 21 are provided, and the top plate 211 or the bottom plate 212 structure is removed, and a pipeline is directly connected to the end of the flow tube 213 to realize the passage of heat exchange fluid in and out. As long as the heat exchange fluid can be passed into and out of the first inlet and outlet chambers and the second inlet and outlet chambers, this embodiment does not specifically limit the position, direction, number, etc. of the connection holes 216.

[0041] Reference Figure 4, the diameter R1 of the inner wall of the protruding part 214 is slightly larger than the diameter R2 of the connecting hole 216, and the difference between the diameter R1 of the protruding part 214 and the diameter R2 of the connecting hole 216 is 2-8 mm, so that the cross-sectional area of the inlet and outlet pipe is smaller than the cross-sectional area of the inlet and outlet cavity. The heat exchange fluid enters the inlet and outlet cavity from the inlet and outlet pipe, that is, from the small channel into the large channel, the flow velocity of the fluid becomes smaller, and the flow pressure of the fluid becomes smaller, so that the heat exchange fluid flows smoothly from the inlet and outlet cavity into the first heat exchange channel and the second heat exchange channel for heat exchange. Such a setting can also make full use of the space of the flow-through pipe 213 and avoid the influence of other factors on the temperature of the heat exchange fluid due to the too large inner cavity of the flow-through pipe 213.

[0042] During the fluid heat exchange process, the first heat exchange fluid enters from the first group of inlet and outlet pipes 41 into the first pipe group 21 and then into the first heat exchange channel. The second heat exchange fluid enters from the second pipe group 22 into the second group of inlet and outlet cavities 32 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 flows out to the outside through the opposite first pipe group 21 and the first group of inlet and outlet pipes 41, and the second heat exchange fluid flows out to the outside through the opposite second pipe group and the second group of inlet and outlet pipes 42. In this embodiment, multiple heat exchange cores 11 are superimposed in parallel, so that the multiple heat exchange cores 11 perform heat exchange work synchronously, enabling the device to meet the working requirements of large-flow heat exchange.

[0043] Refer to Figure 3 , 6 -7, a first step groove 217 is provided at one end of the flow-through pipe 213 along the first direction, and a second step groove 218 is provided at the other end of the flow-through pipe 213 along the first direction. The top plate 211 is hermetically installed in the first step groove 217, and the bottom plate 212 is hermetically installed in the second step groove 218. The sides of the top plate 211 and the bottom plate 212 facing the heat exchange core 11 are hermetically connected to the end plate 113 in the heat exchange core 11 to ensure the tightness of the flow-through pipe 213.

[0044] In this embodiment, the four flow-through pipes 213 are arranged at intervals, that is, there is a certain gap between adjacent flow-through pipes 213. With such a setting, when the two heat exchange fluids to be heat exchanged are different media, different materials of flow-through pipes 213 can be selected according to the characteristics of different heat exchange fluids, avoiding heat conduction between adjacent flow-through pipes 213 and affecting the temperature between different heat exchange fluids. The four flow-through pipes 213 arranged at intervals are also convenient for the maintenance and disassembly of a single flow-through pipe 213.

[0045] In an alternative embodiment, refer to Figure 8 and Figure 9, the four flow-through pipes 213 can also be integrally connected. Side plates 23 are connected between adjacent flow-through pipes 213. There are four side plates 23, that is, the four flow-through pipes 213 are integrally connected by the four side plates 23. The connecting part 215 in the flow-through pipe 213 is set shorter compared with the foregoing embodiment to avoid the side plates 23. The side plates 23 are hermetically connected to the connection area 112, and the side plates 23 are provided with mounting grooves 231 along the first direction and matching the outer edge shape of the connection area 112. With such a setting, the cascade compact heat exchanger can be assembled simply and efficiently. The side plates 23 are also provided with step grooves at the positions where they cooperate with the top plate 211 and the bottom plate 212, which is convenient for the installation of the top plate 211 and the bottom plate 212.

[0046] In an alternative embodiment, only one top plate 211 can be provided, and only one bottom plate 212 can be provided. A number of heat exchange chips in all the heat exchange cores 11 can be directly stacked alternately between the top plate 211 and the bottom plate 212, as long as the flow rates of all the first heat exchange channels and the second heat exchange channels formed by the number of heat exchange chips can meet the working requirements of large-flow heat exchange.

[0047] In an alternative embodiment, the connection manner between the flow-through pipe 213 and the heat exchanger assembly can be welding or adhesive connection, as long as the relative seal between the adjacent first set of inlet / outlet cavities 31 and the second set of inlet / outlet cavities 32 is ensured.

[0048] In an alternative embodiment, multiple parallel cascade compact heat exchangers in the above embodiments can be provided. 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 different required heat exchange flow rates.

[0049] The structure, features and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope defined by the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and the drawings.

Claims

1. A cascade compact heat exchanger, comprising: A heat exchanger assembly, characterized in that the heat exchanger assembly comprises a plurality of heat exchange cores (11) stacked along a first direction, the heat exchange cores (11) comprising a heat exchange area (111), the heat exchange area (111) being provided with a plurality of first heat exchange channels and second heat exchange channels alternately arranged with the first heat exchange channels along the first direction; A connecting tube group is connected to the outer edge of the heat exchanger assembly, and the connecting tube group includes a first tube group (21) connected to all the first heat exchange channels and a second tube group (22) connected to all the second heat exchange channels.

2. The cascade compact heat exchanger according to claim 1, characterized in that: The heat exchange core (11) further comprises a plurality of connection areas (112) arranged at the outer edge of the heat exchange area (111), and the first tube group (21) and the second tube group (22) are both connected to the connection areas (112).

3. The cascade compact heat exchanger according to claim 2, characterized in that: The outer edges of all the heat exchange cores (11) are flush with each other, and the first tube group (21) and the second tube group (22) each include two groups of bottom plates (212) and flow tubes (213) connected to the bottom plates (212), and adjacent flow tubes (213) are arranged at intervals.

4. The cascade compact heat exchanger according to claim 3, characterized in that: The heat exchanger assembly is provided with a slot (114) along the first direction, and the flow pipe (213) is connected to the slot (114).

5. The cascade compact heat exchanger according to claim 3, characterized in that: The through-flow tube (213) group further comprises a side plate (23) connected between adjacent through-flow tubes (213), and the side plate (23) is connected to the connection area (112) and the bottom plate (212).

6. The cascade compact heat exchanger according to claim 5, characterized in that: The side plate (23) is provided with a mounting groove (231) along the first direction that matches the outer edge shape of the connection area (112).

7. The cascade compact heat exchanger according to claim 3, characterized in that: The first tube group (21) and the second tube group (22) further include two top plates (211) corresponding to the positions of the flow tubes (213), and the top plates (211) and / or the bottom plates (212) are provided with connection holes (216) corresponding to the flow tubes (213).

8. The cascade compact heat exchanger according to claim 7, characterized in that: The flow pipe (213) comprises a protruding portion (214) and a connecting portion (215) connected to the protruding portion (214) and extending in the direction of the heat exchanger assembly, and the wall surface of the protruding portion (214) is a curved surface; Alternatively, the inner wall diameter R1 of the protruding portion (214) is greater than the diameter R2 of the connecting hole (216).

9. The cascade compact heat exchanger according to claim 7, characterized in that: The flow pipe (213) is provided with step grooves at both ends along the first direction, and the top plate (211) and the bottom plate (212) are respectively connected to the step grooves at both ends of the flow pipe (213).

10. The cascade compact heat exchanger according to claim 7, characterized in that: The connection hole (216) is connected to an inlet and outlet pipe, and the inlet and outlet pipe is connected to the flow pipe (213) through the connection hole (216).

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