Heat exchanger

Abstract

The utility model discloses a heat exchanger which comprises a heat exchange core body, the heat exchange core body comprises a plurality of heat exchange chips which are arranged in a laminated mode, and a plurality of first heat exchange channels and a plurality of second heat exchange channels which are alternately arranged in the laminated direction are formed among the heat exchange chips. The heat exchange core body further comprises a first group of access channels communicated with the first heat exchange channel, a second group of access channels communicated with the second heat exchange channel, a first pipe group communicated with the first group of access channels, and a second pipe group communicated with the second group of access channels; the included angle alpha between the axis L1 of the first pipe set and the axis L2 of the second pipe set is larger than or equal to 0 degree and smaller than or equal to 30 degrees. The first pipe set and the second pipe set are arranged on the same side or the two opposite sides of the heat exchange core body, when the heat exchanger is installed, the installation requirement can be met by arranging distribution pipes at the two ends of the heat exchange core body at most, and compared with the prior art, the heat exchanger does not occupy much installation space and is convenient to connect the distribution pipes.

Description

Technical Field

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

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers part of the heat of a hot fluid to a cold fluid. A compact heat exchanger is a new type of heat exchanger, which is formed by stacking micro-energy chips with micro-structured channels after rotating a preset angle, or the heat exchanger structure disclosed in the patent with publication number CN115540650A. The heat exchange fins are stacked into a cube shape, and a first inlet / outlet channel, a first heat exchange channel communicating with the first inlet / outlet channel, a second inlet / outlet channel, and a second heat exchange channel communicating with the second inlet / outlet channel are formed inside. The first heat exchange channel and the second heat exchange channel are alternately and spaced apart. After the stack is completed, connection holes need to be opened on the side walls of the cube corresponding to the positions of the first inlet / outlet channel and the second inlet / outlet channel. The connection holes are used to connect the fluid inlet / outlet pipes.

[0003] In the above piping scheme, the pipes have at least three orientations, and when connecting the pipes for introducing the heat exchange fluid, piping also needs to be carried out from at least three directions. Therefore, there is still room for improvement in the piping structure of the above compact heat exchanger. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a heat exchanger to solve the deficiencies in the prior art and facilitate the laying of pipes for introducing heat exchange fluid.

[0005] To achieve one of the above purposes, the utility model provides a heat exchanger, including a heat exchange core body. The heat exchange core body includes a plurality of heat exchange chips stacked layer by layer. A plurality of first heat exchange channels and a plurality of second heat exchange channels are alternately arranged in the stacking direction between the plurality of heat exchange chips. The heat exchange core body further includes a first group of inlet / outlet channels communicating with the first heat exchange channels and a second group of inlet / outlet channels communicating with the second heat exchange channels. It is characterized in that: the heat exchanger further includes a first pipe group communicating with the first group of inlet / outlet channels and a second pipe group communicating with the second group of inlet / outlet channels. The range of the included angle α between the axis L1 of the first pipe group and the axis L2 of the second pipe group is: 0° ≤ α ≤ 30°.

[0006] As a further improvement of an embodiment of the utility model, a first group of connection holes communicating with the first group of inlet / outlet channels are opened on the side wall of the heat exchange core body. The first pipe group is connected to the first group of inlet / outlet channels through the first group of connection holes.

[0007] As a further improvement of an embodiment of the present utility model, the first tube group includes two first inlet / outlet tubes, the first set of connection holes includes two first connection holes, the first inlet / outlet tube includes an extension tube and an interface tube that communicate with each other, and the extension tube is connected at the position of the first connection hole.

[0008] As a further improvement of an embodiment of the present utility model, the extension tube is a non-closed tube along its circumferential direction, the extension tube has a wall surface, and the wall surface is connected to the heat exchange core.

[0009] As a further improvement of an embodiment of the present utility model, the size of the opening of the extension tube on the wall surface is not less than the size of the first connection hole.

[0010] As a further improvement of an embodiment of the present utility model, the length L3 of the inner cavity of the extension tube along the axial direction is greater than 1 / 2 of the length L4 of the first set of inlet / outlet channels.

[0011] As a further improvement of an embodiment of the present utility model, the first set of inlet / outlet channels includes two first inlet / outlet channels, the inner cavity of the extension tube, the first connection hole, and the first inlet / outlet channels together form a flow-through cavity, and the length L5 of the flow-through cavity in the first direction is greater than the diameter R of the interface tube.

[0012] As a further improvement of an embodiment of the present utility model, the outer wall of the end of the extension tube away from the interface tube is set as a curved surface;

[0013] Or, the inner wall of the extension tube is set as a folded surface or a curved surface.

[0014] As a further improvement of an embodiment of the present utility model, the heat exchange core further includes two end plates respectively arranged on both sides of a plurality of the heat exchange chips in the stacking direction, the end plates are provided with installation holes communicating with the first inlet / outlet tubes and the first connection holes, and the interface tube is connected between the installation holes and the ends of the extension tubes.

[0015] As a further improvement of an embodiment of the present utility model, the end of the interface tube is provided with a first step groove, the end of the extension tube is provided with a second step groove that is snap-fitted with the first step groove, and the inner wall of the installation hole matches the first step groove.

[0016] Compared with the prior art, the first tube group and the second tube group in the present utility model extend in approximately the same direction or in two opposite directions, that is, the first tube group and the second tube group are arranged on the same side or on the opposite sides of the heat exchange core. When installing the heat exchanger, at most, pipes are arranged at both ends of the heat exchange core to meet the installation requirements, and compared with the prior art, it does not occupy much installation space and is convenient for laying pipes for introducing heat exchange fluids. Brief Description of the Drawings

[0017] Figure 1 is a top view of a heat exchanger in this embodiment;

[0018] Figure 2 is Figure 1 a sectional view taken along line A - A in

[0019] Figure 3 is a sectional view of the structure of multiple heat exchange chips stacked;

[0020] Figure 4 is a front view of a heat exchanger in this embodiment;

[0021] Figure 5 is a front view of a heat exchanger in an alternative embodiment;

[0022] Figure 6 is Figure 4 a sectional view taken along line B - B in

[0023] Figure 7 is Figure 2 a schematic diagram of the detailed structure of , where the interface pipe is in an exploded state;

[0024] Figure 8 is Figure 4 a sectional view taken along line C - C in .

[0025] Reference Numerals:

[0026] 10. Heat exchange core; 11. End plate; 111. Mounting hole; 12. Heat exchange chip; 13. First heat exchange channel; 14. Second heat exchange channel; 15. First set of inlet / outlet channels; 151. First inlet / outlet channel; 16. Second set of inlet / outlet channels; 161. Second inlet / outlet channel; 17. First set of connection holes; 171. First connection hole; 20. First pipe group; 21. First inlet / outlet pipe; 211. Extension pipe; 212. Interface pipe; 213. Second step groove; 214. First step groove; 30. Second pipe group; 31. Second inlet / outlet pipe. Detailed Embodiments

[0027] The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The terms "first", "second", etc. 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, 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 a sealing material or adhesive connection is provided 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.

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the attached Figure 1 -8.

[0030] An embodiment of the present utility model provides a heat exchanger. Referring to Figure 1 -3, it includes a heat exchange core 10, a first pipe group 20 and a second pipe group 30 connected to the heat exchange core 10. The heat exchange core 10 includes two end plates 11 and a plurality of heat exchange chips 12 stacked between the two end plates 11. A heat exchange channel is formed between each adjacent pair of heat exchange chips 12. Part of the heat exchange channels are first heat exchange channels 13, and the other part are second heat exchange channels 14. The first heat exchange channels 13 and the second heat exchange channels 14 are alternately arranged along the stacking direction. The heat exchange core 10 further includes a first set of inlet and outlet channels 15 communicating with the first heat exchange channels 13 and a second set of inlet and outlet channels 16 communicating with the second heat exchange channels 14 (refer to Figure 8 ), the first pipe group 20 communicates with the first set of inlet and outlet channels 15, and the second pipe group 30 communicates with the second set of inlet and outlet channels 16.

[0031] During the heat exchange process, the first heat exchange fluid flows from the first pipe group 20 to the first set of inlet and outlet channels 15, and then from the first set of inlet and outlet channels 15 into the first heat exchange channels 13. The second heat exchange fluid flows from the second pipe group 30 to the second set of inlet and outlet channels 16, and then from the second set of inlet and outlet channels 16 into the second heat exchange channels 14. The first heat exchange fluid and the second heat exchange fluid perform heat exchange at the positions of the heat exchange channels. After the heat exchange, the first heat exchange fluid then flows to the outside through the first set of inlet and outlet channels 15 and the first pipe group 20, and the second heat exchange fluid then flows to the outside through the second set of inlet and outlet channels 16 and the second pipe group 30.

[0032] Referring to Figure 4, the pipe orifices of the first pipe group 20 and the second pipe group 30 face towards the two ends in the stacking direction respectively, and the axes of the first pipe group 20 and the second pipe group 30 are substantially parallel. In this embodiment, the included angle α between the axis L1 of the first pipe group 20 and the axis L2 of the second pipe group 30 is 0°. The first pipe group 20 and the second pipe group 30 extend in the same direction or in opposite directions. When installing the heat exchanger, arranging the pipes only from the two ends of the axes L1 and L2 can meet the installation requirements, and it will not occupy much installation space compared with the prior art, which is convenient for connecting the pipes.

[0033] In other embodiments, referring to Figure 5 , the range of the included angle α between the axis L1 and the axis L2 is 0° ≤ α ≤ 30°. The included angle α between the axis L1 and the axis L2 can be 5° - 15°, and the included angle α can also be 15° - 25°. The smaller the included angle α, the more convenient the piping of the heat exchanger.

[0034] In other embodiments, the pipe orifices of the first pipe group 20 and the second pipe group 30 can be located on the same side of the heat exchange core 10, so that the pipes of the heat exchanger are all located on the same side of the heat exchange core 10. The orientations of the first pipe group 20 and the second pipe group 30 can be determined according to different piping requirements, and no specific limitation is made in this embodiment.

[0035] Referring to Figure 2 , a first group of connection holes 17 are formed on one side of the heat exchange core 10, and the first pipe group 20 is connected to the first group of inlet / outlet channels 15 through the first group of connection holes 17. The first pipe group 20 includes two first inlet / outlet pipes 21, the first group of connection holes 17 includes two first connection holes 171, and the first group of inlet / outlet channels 15 includes two first inlet / outlet channels 151. The two first inlet / outlet pipes 21 and the first connection holes 171 are axially symmetrically arranged with respect to the axis of the heat exchange core 10 in the stacking direction. In an alternative embodiment, the two first inlet / outlet pipes 21 and the first connection holes 171 can be centrosymmetric with respect to the center point of the heat exchange core 10.

[0036] Referring to Figure 2 and Figure 4 , the first inlet / outlet pipe 21 includes an extension pipe 211 and an interface pipe 212 that are connected to each other, and the position of the extension pipe 211 corresponds to the position of the first connection hole 171. The extension pipe 211 is a non-closed pipe along its circumferential direction, that is, the extension pipe 211 is provided with a notch along its axial direction or a direction parallel to the axis. The outer edge surface of the extension pipe 211 can be a semi-circular arc or a major arc or a minor arc. In this embodiment, the outer edge surface of the extension pipe 211 is set as a semi-circular arc. Moreover, the outer edge surface of the end of the extension pipe 211 away from the interface pipe 212 is set as a curved surface. By setting like this, the weight of the entire heat exchanger can be reduced, and the installation space occupied by the heat exchanger can also be reduced.

[0037] Referring to Figure 6 andFigure 7 An installation hole 111 communicating with the first access pipe 21 and the first connection hole 171 is formed in the end plate 11, and the interface pipe 212 is connected between the installation hole 111 and the end of the extension pipe 211. The installation hole 111 is set as a semi-circular shape and size matching that of the interface pipe 212, and the installation hole 111 and the end of the extension pipe 211 enclose a circular installation opening. The end plate 11 forms a step with the heat exchange chip 12 at the position of the installation hole 111. A second step groove 213 is provided at the end of the extension pipe 211, and a first step groove 214 engaging with the installation hole 111 and the second step groove 213 is provided at the end of the interface pipe 212.

[0038] After the extension pipe 211 is connected to the heat exchange core 10, the end of the extension pipe 211 and the installation hole 111 on the end plate 11 are spliced to form a circular hole, and the interface pipe 212 can be installed in this circular hole. By using the setting of the step grooves, the connection between the interface pipe 212 and the end plate 11 and the extension pipe 211 can be made more firm.

[0039] Refer to Figure 7 At the end of the inner cavity of the extension pipe 211 away from the interface pipe 212, a bent portion is formed. The bent portion can be a folded surface or a curved surface. Preferably, the bent portion is a curved surface. The heat exchange fluid flows into the extension pipe 211 from the interface pipe 212 and then into the first connection hole 171. The flow direction of the heat exchange fluid will form an inflection point, and the curved surface of the bent portion can guide the heat exchange fluid, reducing the impact and vortex generated by the heat exchange fluid at the inflection point and reducing the flow loss.

[0040] Refer to Figure 8 At the notch of the extension pipe 211, there is a wall surface which is hermetically connected to the side wall of the heat exchange core 10. The size of the opening of the extension pipe 211 on the wall surface is not less than the size of the first connection hole 171. In this embodiment, the size of the opening of the extension pipe 211 on the wall surface is the same as the size of the opening of the first connection hole 171. The inner wall of the first connection hole 171 is located on the circumferential extension plane of the inner wall of the inner cavity of the extension pipe 211, that is, the inner wall of the first connection hole 171 is set as an arc surface. When the fluid flows from the extension pipe 211 to the first connection hole 171, it can flow evenly at the connection position, and the heat exchange fluid is guided by the arc inner wall when entering the first connection hole 171, with less resistance and less fluid loss at the connection position.

[0041] Refer to Figure 2 and Figure 7, the extension pipe 211 extends along the axial direction away from the interface pipe 212, such that the length L3 of the inner cavity of the extension pipe 211 along the axial direction is greater than 1 / 2 of the length L4 of the first set of access channels 15. The first set of access channels 15 includes two first access channels 151. The inner cavity of the extension pipe 211, the first connection hole 171, and the first access channels 151 together form a flow-through cavity. The length L5 of the flow-through cavity in the first direction is greater than the diameter R of the interface pipe 212. With such a setting, the volume of the inner cavity of the extension pipe 211 and the volume of the flow-through cavity are increased, and the fluid loss of the fluid entering the extension pipe 211 is small.

[0042] The second pipe group 30 is connected to the end plate 11. A second set of connection holes (not shown in the figure) is provided on the end plate 11. The second pipe group 30 is communicated with the second set of access channels 16 through the second set of connection holes. The second pipe group 30 includes two second access pipes 31. The second set of access channels 16 includes two second access channels 161. The two second access pipes 31 can be arranged on the same side of the heat exchange core 10, or can be arranged on opposite sides of the heat exchange core 10.

[0043] In an alternative embodiment, the second pipe group 30 can adopt the same structure as the first pipe group 20 and be connected to the heat exchange core 10 in the same assembly manner. This embodiment is not specifically limited.

[0044] The structure, features, and function and effect 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 by the scope shown in the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, still within the spirit covered by the specification and the drawings, should be within the protection scope of the present invention.

Claims

1. A heat exchanger, comprising a heat exchange core (10), the heat exchange core (10) comprising a plurality of heat exchange chips (12) arranged in a stacked manner, a plurality of first heat exchange channels (13) and a plurality of second heat exchange channels (14) arranged alternately in a stacking direction are formed between the plurality of heat exchange chips (12), the heat exchange core (10) further comprising a first group of inlet and outlet channels (15) connected to the first heat exchange channels (13) and a second group of inlet and outlet channels (16) connected to the second heat exchange channels (14), characterized in that: The heat exchanger further comprises a first tube group (20) connected to the first group of inlet and outlet channels (15) and a second tube group (30) connected to the second group of inlet and outlet channels (16), wherein the angle α between the axis L1 of the first tube group (20) and the axis L2 of the second tube group (30) is in the range of 0°≤α≤30°.

2. The heat exchanger according to claim 1, characterized in that: A first group of connecting holes (17) connected to a first group of inlet and outlet channels (15) is formed on the side wall of the heat exchange core (10); the first tube group (20) is connected to the first group of inlet and outlet channels (15) via the first group of connecting holes (17).

3. The heat exchanger according to claim 2, characterized in that: The first tube group (20) comprises two first inlet and outlet tubes (21), the first group of connection holes (17) comprises two first connection holes (171), the first inlet and outlet tubes (21) comprise an extension tube (211) and an interface tube (212) which are interconnected, and the extension tube (211) is connected at the position of the first connection hole (171).

4. The heat exchanger according to claim 3, characterized in that: The extension tube (211) is a non-closed tube along its circumferential direction. The extension tube (211) has a wall surface, and the wall surface is connected to the heat exchange core (10).

5. The heat exchanger according to claim 4, characterized in that: The size of the opening of the extension tube (211) located on the wall surface is not smaller than the size of the first connecting hole (171).

6. The heat exchanger according to claim 4 or 5, characterized in that: The length L3 of the inner cavity of the extension tube (211) along the axial direction is greater than 1 / 2 of the length L4 of the first group of inlet and outlet channels (15).

7. The heat exchanger according to claim 6, characterized in that: The first group of inlet and outlet channels (15) includes two first inlet and outlet channels (151), and the inner cavity of the extension tube (211), the first connecting hole (171), and the first inlet and outlet channels (151) together form a flow cavity, and the length L5 of the flow cavity in the first direction is greater than the diameter R of the interface tube (212).

8. The heat exchanger according to claim 4, characterized in that: The outer wall of one end of the extension tube (211) away from the mouthpiece tube (212) is arranged as a curved surface; Alternatively, the inner wall of the extension tube (211) is configured as a folded surface or a curved surface.

9. The heat exchanger according to claim 3, characterized in that: The heat exchange core (10) further comprises two end plates (11) respectively arranged on both sides of the plurality of heat exchange chips (12) in the stacking direction, the end plates (11) being provided with mounting holes (111) connected to the first inlet and outlet pipes (21) and the first connecting holes (171), and the interface pipe (212) being connected between the mounting holes (111) and the end of the extension pipe (211).

10. The heat exchanger according to claim 9, characterized in that: The end of the interface pipe (212) is provided with a first step groove (214), the end of the extension pipe (211) is provided with a second step groove (213) that is snap-fitted with the first step groove (214), and the inner wall of the mounting hole (111) matches the first step groove (214).

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