Heat exchanger

Abstract

The utility model provides a heat exchanger which comprises a shell, a heat exchanger body and a heat exchanger body. The shell is provided with a containing cavity and two opening parts which are communicated with the containing cavity and used for gas to go in and out. The slot type heat exchange unit comprises a heat exchange part and a connecting part which are connected with each other, the heat exchange part is used for allowing a refrigerant to flow through, the shell is further provided with an insertion port, the heat exchange part is inserted into the containing cavity through the insertion port, and the connecting part is located outside the containing cavity and detachably connected with the shell; therefore, the number of the slot type heat exchange units can be selectively set, and the problem that in the prior art, heat exchange unit structures of a heat exchanger are all fixed, and therefore the heat exchanger is only suitable for specific application scenes is solved.

Description

Technical Field

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

[0002] The thermal efficiency of an engine is generally only 30% to 50%. The remaining energy of the fuel will be released into the atmosphere in the form of exhaust, heat radiation, cylinder liner water heat dissipation, etc. The energy quality of engine exhaust is relatively high. Effectively recycling and utilizing this energy is of great significance for reducing vehicle energy consumption and reducing carbon dioxide emissions. Using a heat exchanger to recover the waste heat of the engine exhaust will often increase the exhaust back pressure of the engine due to the resistance of the heat exchanger, thereby affecting the performance of the engine.

[0003] The gas-liquid heat exchangers in the prior art are divided into shell and tube type, fin-tube type, plate type and plate-fin type. The heat exchange unit structures of these heat exchangers are fixed and not variable, so they are only suitable for specific application scenarios. In order to reduce the flow resistance of the heat exchanger, measures such as optimizing the flow channel structure and reducing surface drag are often adopted. However, when the operating conditions of the application scenario change, the heat exchanger needs to be re-matched, which ultimately leads to high cost of use, poor versatility, and cannot be used on a large scale.

[0004] The specific explanations of each noun appearing in this utility model are as follows:

[0005] Engine exhaust: The exhaust gas discharged from the engine after it works.

[0006] Thermal radiation: When the engine is working, the body temperature is higher than the ambient temperature, and the body transfers heat to the environment in the form of radiation.

[0007] Jacket water: coolant in the cylinder jacket of the engine body.

[0008] Heat exchanger: In engineering applications, two fluids at different temperatures are separated by a solid wall, and heat is transferred through the solid wall to achieve heat exchange.

[0009] Reynolds number: a dimensionless parameter for determining the flow state of a fluid.

[0010] Turbulence: A state of fluid flow. Utility Model Content

[0011] The main purpose of the utility model is to provide a heat exchanger to solve the problem that the heat exchange unit structure of the heat exchanger in the prior art is fixed and thus is only suitable for specific application scenarios.

[0012] In order to achieve the above-mentioned purpose, the utility model provides a heat exchanger, including: a shell, the shell is provided with a accommodating cavity and two openings connected with the accommodating cavity for gas to enter and exit; at least one slot-type heat exchange unit, the slot-type heat exchange unit includes a heat exchange part and a connecting part connected to each other, the heat exchange part is used for refrigerant to flow through, and the shell is also provided with a plug-in interface, the heat exchange part is plugged into the accommodating cavity through the plug-in interface, and the connecting part is located outside the accommodating cavity and is detachably connected to the shell, so that the number of slot-type heat exchange units can be selectively set.

[0013] Furthermore, the heat exchanger also includes two gas inlet and outlet joints, both of which are located outside the shell and are detachably connected to the shell, and the two gas inlet and outlet joints are respectively arranged corresponding to the two openings.

[0014] Furthermore, each gas inlet and outlet joint includes a connecting plate, a transition part and a pipe interface which are connected in sequence. The connecting plate is connected to the shell, and the flow area of ​​the transition part gradually decreases in the direction away from the shell. The pipe interface is used to connect to an external gas pipeline.

[0015] Furthermore, the heat exchange part includes: two refrigerant headers, the two refrigerant headers are arranged at intervals along a first direction; a plurality of heat exchange tubes, the plurality of heat exchange tubes all extend along the first direction and are arranged at intervals along a second direction to form a plurality of heat exchange intervals; a plurality of fin combinations, the plurality of fin combinations are arranged one-to-one in the plurality of heat exchange intervals, and each fin combination includes a plurality of fins arranged at intervals along the first direction; wherein the first direction and the second direction are perpendicular to each other.

[0016] Furthermore, the heat exchange tube is a flat tube, and a plurality of heat exchange chambers are arranged on the heat exchange tube. The plurality of heat exchange chambers are arranged at intervals along the third direction, and each heat exchange chamber extends along the second direction; wherein the third direction is perpendicular to the first direction and the second direction.

[0017] Furthermore, the connecting part includes: a cover plate, which is fixedly connected to the two refrigerant collecting pipes and detachably connected to the shell; two refrigerant inlet and outlet joints, which are arranged on the cover plate at intervals, and the two refrigerant inlet and outlet joints are both located on the side of the cover plate away from the heat exchange part and are respectively connected to the two refrigerant collecting pipes.

[0018] Furthermore, the cover plate and the shell are connected by a plurality of fasteners, the cover plate is provided with a plurality of through holes for correspondingly inserting the threaded ends of the plurality of fasteners, and the shell is provided with a plurality of threaded holes for correspondingly threaded connection with the threaded ends of the plurality of fasteners.

[0019] Furthermore, there are multiple slot-type heat exchange units, and the multiple slot-type heat exchange units are arranged at intervals along the third direction, and two adjacent slot-type heat exchange units are connected by a unit connecting pipe.

[0020] Furthermore, the connection parts of each slot-type heat exchange unit are located on the same side of the shell.

[0021] Further, the two openings are spaced apart along a third direction, and the plurality of slot-type heat exchange units are located between the two openings, and the two openings include an external air inlet and an external air outlet, wherein a slot-type heat exchange unit close to the air inlet among the plurality of slot-type heat exchange units is provided with an external refrigerant outlet, and a slot-type heat exchange unit close to the air outlet among the plurality of slot-type heat exchange units is provided with an external refrigerant inlet; or a slot-type heat exchange unit close to the air inlet among the plurality of slot-type heat exchange units is provided with an external refrigerant inlet, and a slot-type heat exchange unit close to the air outlet among the plurality of slot-type heat exchange units is provided with an external refrigerant outlet.

[0022] Applying the technical solution of the utility model, the heat exchanger of the utility model includes: a shell, the shell is provided with a accommodating cavity and two openings connected with the accommodating cavity for gas to enter and exit; at least one slot-type heat exchange unit, the slot-type heat exchange unit includes a heat exchange part and a connecting part connected to each other, the heat exchange part is used for refrigerant to flow through, and the shell is also provided with a plug-in interface, the heat exchange part is plugged into the accommodating cavity through the plug-in interface, and the connecting part is located outside the accommodating cavity and is detachably connected to the shell, so that the number of slot-type heat exchange units can be set selectively. In this way, the heat exchanger of the present invention adopts an integrated and modular design, integrating the heat exchange components of the heat exchanger into independent and detachable slot-type heat exchange units, ensuring the variability of the structure and flow resistance of the heat exchanger. The user can change the number of slot-type heat exchange units according to the flow rate, temperature characteristics and flow resistance requirements of the gas heat source to change the heat exchange area and flow resistance of the heat exchanger, and then change the heat exchange capacity of the heat exchanger, so that the heat exchanger can achieve the best use effect in various application scenarios, expand the scope of applicable scenarios of the heat exchanger, and solve the problem that the heat exchange unit structure of the heat exchanger in the prior art is fixed and therefore only suitable for specific application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 1 A schematic structural diagram of an embodiment of a heat exchanger according to the utility model is shown;

[0025] Figure 2 Shows Figure 1 A schematic structural diagram of a slot-type heat exchange unit of a heat exchanger shown;

[0026] Figure 3 Shows Figure 2A partial schematic diagram of a slot-type heat exchange unit shown;

[0027] Figure 4 Shows Figure 1 A first gas-liquid flow arrangement diagram of the heat exchanger shown;

[0028] Figure 5 Shows Figure 1 A second gas-liquid flow arrangement of the heat exchanger is shown.

[0029] The above drawings include the following reference numerals:

[0030] 1. Gas inlet and outlet joints; 11. Connecting plate; 12. Transition part; 13. Pipe interface;

[0031] 2. Shell; 20. Accommodating chamber;

[0032] 3. slot-type heat exchange unit; 31. heat exchange part; 311. refrigerant header; 312. heat exchange tube; 3121. heat exchange cavity; 313. fin assembly; 32. connection part; 321. cover plate; 322. refrigerant inlet and outlet joint;

[0033] 4. Fasteners;

[0034] 5. Unit connecting pipe. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] like Figures 1 to 5 As shown, the utility model provides a heat exchanger, including: a shell 2, the shell 2 is provided with a accommodating cavity 20 and two openings connected with the accommodating cavity 20 for gas to enter and exit; at least one slot-type heat exchange unit 3, the slot-type heat exchange unit 3 includes a heat exchange part 31 and a connecting part 32 connected to each other, the heat exchange part 31 is used for refrigerant to flow through, and the shell 2 is also provided with a plug-in interface, the heat exchange part 31 is inserted in the accommodating cavity 20 through the plug-in interface, and the connecting part 32 is located outside the accommodating cavity 20 and is detachably connected to the shell 2, so that the number of slot-type heat exchange units 3 can be set selectively.

[0037] In this way, the heat exchanger of the utility model adopts an integrated and modular design, integrating the heat exchange components of the heat exchanger into an independent and detachable slot-type heat exchange unit 3, ensuring the variability of the structure and flow resistance of the heat exchanger. The user can change the number of slot-type heat exchange units 3 according to the flow rate, temperature characteristics and flow resistance requirements of the gas heat source to change the heat exchange area and flow resistance of the heat exchanger, and then change the heat exchange capacity of the heat exchanger, so that the heat exchanger can achieve the best use effect in various application scenarios, expand the scope of applicable scenarios of the heat exchanger, and solve the problem that the heat exchange unit structure of the heat exchanger in the prior art is fixed and therefore only suitable for specific application scenarios.

[0038] Specifically, when the heat exchanger of the utility model is used in an engine, the exhaust back pressure of the engine can be adjusted, thereby comprehensively improving the performance of the engine and the waste heat recovery device.

[0039] The heat exchanger of the utility model can be widely used in various gas-liquid heat exchange scenarios, and engine exhaust waste heat recovery is only one example among its multiple application scenarios.

[0040] like Figure 1 As shown, the heat exchanger further includes two gas inlet and outlet joints 1, both of which are located outside the shell 2 and are detachably connected to the shell 2, and the two gas inlet and outlet joints 1 are respectively arranged corresponding to the two openings.

[0041] Specifically, each gas inlet and outlet joint 1 includes a connecting plate 11, a transition portion 12 and a pipe interface 13 connected in sequence. The connecting plate 11 is connected to the shell 2, and the flow area of ​​the transition portion 12 gradually decreases in the direction away from the shell 2. The pipe interface 13 is used to connect to an external gas pipeline.

[0042] like Figure 2 As shown, the heat exchange part 31 includes: two refrigerant headers 311, the two refrigerant headers 311 are arranged at intervals along the first direction; a plurality of heat exchange tubes 312, the plurality of heat exchange tubes 312 all extend along the first direction and are arranged at intervals along the second direction to form a plurality of heat exchange intervals; a plurality of fin assemblies 313, the plurality of fin assemblies 313 are arranged one by one in the plurality of heat exchange intervals, and each fin assembly 313 includes a plurality of fins arranged at intervals along the first direction; wherein the first direction and the second direction are perpendicular to each other.

[0043] like Figure 3 As shown, the heat exchange tube 312 is a flat tube, and a plurality of heat exchange chambers 3121 are arranged on the heat exchange tube 312. The plurality of heat exchange chambers 3121 are arranged at intervals along the third direction, and each heat exchange chamber 3121 extends along the second direction; wherein the third direction is perpendicular to the first direction and the second direction.

[0044] First, by configuring the heat exchange tube 312 as a multi-channel thin-walled flat tube to serve as a primary heat exchange surface between the gas and the refrigerant, when the exhaust gas flows through multiple heat exchange intervals, a heat transfer process from the gas to the refrigerant is completed.

[0045] Secondly, by arranging a plurality of fin assemblies 313 in a one-to-one correspondence within a plurality of heat exchange intervals to serve as secondary heat exchange surfaces between the gas and the refrigerant, it is possible to ensure that the refrigerant absorbs more heat without significantly increasing the gas flow resistance.

[0046] In this way, on the one hand, the setting of the secondary heat exchange surface greatly increases the contact area between the gas and the heat exchange part 31, thereby increasing the heat exchange area of ​​the heat exchanger; on the other hand, the presence of multiple fin combinations 313 enables the exhaust gas to reach a turbulent state at a lower Reynolds number, thereby increasing the convective heat transfer coefficient between the exhaust gas and the metal wall of the heat exchanger.

[0047] like Figure 1 and Figure 2 As shown, the connecting portion 32 includes: a cover plate 321, which is fixedly connected to the two refrigerant headers 311, and the cover plate 321 is detachably connected to the shell 2; two refrigerant inlet and outlet joints 322, which are spaced apart on the cover plate 321, and the two refrigerant inlet and outlet joints 322 are both located on the side of the cover plate 321 away from the heat exchange portion 31 and are respectively connected to the two refrigerant headers 311.

[0048] Specifically, each refrigerant inlet and outlet connector 322 in the connecting portion 32 is a standard interface. By connecting each refrigerant inlet and outlet connector 322 in series, a complete refrigerant channel can be formed. The user can switch the flow direction of the refrigerant relative to the exhaust gas as needed to form a countercurrent arrangement or a cocurrent arrangement between gas and liquid, thereby meeting the needs of various application scenarios.

[0049] like Figure 1 As shown, the cover plate 321 is connected to the shell 2 via a plurality of fasteners 4, the cover plate 321 is provided with a plurality of through holes for correspondingly inserting the threaded ends of the plurality of fasteners 4, and the shell 2 is provided with a plurality of threaded holes for correspondingly threadedly connecting with the threaded ends of the plurality of fasteners 4.

[0050] Preferably, there are multiple slot-type heat exchange units 3 , and the multiple slot-type heat exchange units 3 are arranged at intervals along the third direction, and two adjacent slot-type heat exchange units 3 are connected via a unit connecting pipe 5 .

[0051] Further preferably, the connection parts 32 of each slot-type heat exchange unit 3 are located on the same side of the shell 2 (ie, the outside of the shell 2), so that the disassembly and assembly operations of the multiple slot-type heat exchange units 3 are simpler, more convenient and more efficient.

[0052] Optionally, the two openings are spaced apart along a third direction, and the plurality of slot-type heat exchange units 3 are located between the two openings, and the two openings include an external air inlet and an external air outlet, wherein the slot-type heat exchange unit 3 near the air inlet among the plurality of slot-type heat exchange units 3 is provided with an external refrigerant outlet, and the slot-type heat exchange unit 3 near the air outlet among the plurality of slot-type heat exchange units 3 is provided with an external refrigerant inlet; or the slot-type heat exchange unit 3 near the air inlet among the plurality of slot-type heat exchange units 3 is provided with an external refrigerant inlet, and the slot-type heat exchange unit 3 near the air outlet among the plurality of slot-type heat exchange units 3 is provided with an external refrigerant outlet.

[0053] like Figure 4 As shown, a refrigerant inlet and outlet joint 322 on a slot-type heat exchange unit 3 near the air inlet among the multiple slot-type heat exchange units 3 is an external refrigerant outlet for connecting to an external refrigerant pipeline, and a refrigerant inlet and outlet joint 322 on a slot-type heat exchange unit 3 near the air outlet among the multiple slot-type heat exchange units 3 is an external refrigerant inlet for connecting to an external refrigerant pipeline, so that the gas-liquid flow direction of the heat exchanger is opposite.

[0054] like Figure 5 As shown, a refrigerant inlet and outlet joint 322 on a slot-type heat exchange unit 3 near the air inlet among the multiple slot-type heat exchange units 3 is an external refrigerant inlet for connecting to an external refrigerant pipeline, and a refrigerant inlet and outlet joint 322 on a slot-type heat exchange unit 3 near the air outlet among the multiple slot-type heat exchange units 3 is an external refrigerant outlet for connecting to an external refrigerant pipeline, so that the gas-liquid flow direction of the heat exchanger is the same.

[0055] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0056] The heat exchanger of the utility model comprises: a shell 2, on which is provided a housing chamber 20 and two openings connected with the housing chamber 20 for gas to enter and exit; at least one slot-type heat exchange unit 3, the slot-type heat exchange unit 3 comprises a heat exchange portion 31 and a connecting portion 32 connected to each other, the heat exchange portion 31 is used for the refrigerant to flow through, and the shell 2 is also provided with a plug-in interface, the heat exchange portion 31 is inserted into the housing chamber 20 through the plug-in interface, and the connecting portion 32 is located outside the housing chamber 20 and is detachably connected to the shell 2, so that the number of slot-type heat exchange units 3 can be selectively set. In this way, the heat exchanger of the utility model adopts an integrated and modular design, integrating the heat exchange components of the heat exchanger into an independent and detachable slot-type heat exchange unit 3, ensuring the variability of the structure and flow resistance of the heat exchanger. The user can change the number of slot-type heat exchange units 3 according to the flow rate, temperature characteristics and flow resistance requirements of the gas heat source to change the heat exchange area and flow resistance of the heat exchanger, and then change the heat exchange capacity of the heat exchanger, so that the heat exchanger can achieve the best use effect in various application scenarios, expand the scope of applicable scenarios of the heat exchanger, and solve the problem that the heat exchange unit structure of the heat exchanger in the prior art is fixed and therefore only suitable for specific application scenarios.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0059] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat exchanger, characterized in that: include: A shell (2), the shell (2) being provided with a containing cavity (20) and two openings communicating with the containing cavity (20) for allowing gas to enter and exit; At least one slot-type heat exchange unit (3), the slot-type heat exchange unit (3) comprising a heat exchange portion (31) and a connection portion (32) connected to each other, the heat exchange portion (31) being used for allowing refrigerant to flow through, the shell (2) also being provided with a plug-in port, the heat exchange portion (31) being inserted into the accommodating cavity (20) through the plug-in port, the connection portion (32) being located outside the accommodating cavity (20) and being detachably connected to the shell (2), so that the number of the slot-type heat exchange units (3) can be selectively set.

2. The heat exchanger according to claim 1, characterized in that The heat exchanger further comprises two gas inlet and outlet joints (1), the two gas inlet and outlet joints (1) are both located outside the shell (2) and are both detachably connected to the shell (2), and the two gas inlet and outlet joints (1) are respectively arranged corresponding to the two openings.

3. The heat exchanger according to claim 2, characterized in that Each of the gas inlet and outlet joints (1) comprises a connecting plate (11), a transition portion (12) and a pipe interface (13) which are connected in sequence; the connecting plate (11) is connected to the shell (2); the flow area of ​​the transition portion (12) gradually decreases in a direction away from the shell (2); and the pipe interface (13) is used for connecting to an external gas pipeline.

4. The heat exchanger according to claim 1, characterized in that The heat exchange part (31) comprises: Two refrigerant headers (311), the two refrigerant headers (311) being arranged at intervals along a first direction; A plurality of heat exchange tubes (312), each of the plurality of heat exchange tubes (312) extending along the first direction and arranged at intervals along the second direction to form a plurality of heat exchange intervals; A plurality of fin assemblies (313), the plurality of fin assemblies (313) being arranged one by one in a plurality of heat exchange intervals, and each of the fin assemblies (313) comprising a plurality of fins arranged at intervals along the first direction; The first direction and the second direction are perpendicular to each other.

5. The heat exchanger according to claim 4, characterized in that The heat exchange tube (312) is a flat tube, and a plurality of heat exchange chambers (3121) are arranged on the heat exchange tube (312), and the plurality of heat exchange chambers (3121) are arranged at intervals along a third direction, and each of the heat exchange chambers (3121) extends along the second direction; wherein the third direction is perpendicular to both the first direction and the second direction.

6. The heat exchanger according to claim 4, characterized in that The connecting portion (32) comprises: A cover plate (321), the cover plate (321) being fixedly connected to the two refrigerant headers (311), and the cover plate (321) being detachably connected to the shell (2); Two refrigerant inlet and outlet joints (322), the two refrigerant inlet and outlet joints (322) are arranged at intervals on the cover plate (321), and the two refrigerant inlet and outlet joints (322) are both located on a side of the cover plate (321) away from the heat exchange part (31) and are respectively connected to the two refrigerant collecting pipes (311).

7. The heat exchanger according to claim 6, characterized in that The cover plate (321) and the shell (2) are connected via a plurality of fasteners (4); the cover plate (321) is provided with a plurality of through holes for correspondingly inserting the threaded ends of the plurality of fasteners (4); and the shell (2) is provided with a plurality of threaded holes for correspondingly threadedly connecting with the threaded ends of the plurality of fasteners (4).

8. The heat exchanger according to any one of claims 1 to 7, characterized in that The number of the slot-type heat exchange units (3) is multiple, and the multiple slot-type heat exchange units (3) are arranged at intervals along the third direction, and two adjacent slot-type heat exchange units (3) are connected via a unit connecting pipe (5).

9. The heat exchanger according to claim 8, characterized in that The connection parts (32) of each of the slot-type heat exchange units (3) are located on the same side of the shell (2).

10. The heat exchanger according to claim 8, characterized in that The two openings are arranged at intervals along the third direction, and the plurality of slot-type heat exchange units (3) are located between the two openings. The two openings include an external air inlet and an external air outlet, wherein: The slot-type heat exchange unit (3) close to the air inlet among the plurality of slot-type heat exchange units (3) is provided with an external refrigerant outlet, and the slot-type heat exchange unit (3) close to the air outlet among the plurality of slot-type heat exchange units (3) is provided with an external refrigerant inlet; or An external refrigerant inlet is provided on the slot-type heat exchange unit (3) close to the air inlet among the plurality of slot-type heat exchange units (3), and an external refrigerant outlet is provided on the slot-type heat exchange unit (3) close to the air outlet among the plurality of slot-type heat exchange units (3).

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