Heat exchanger

Abstract

The utility model provides a heat exchanger which comprises a connecting block and at least two sets of heat exchange assemblies, and each heat exchange assembly comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pipes. The first collecting pipe is provided with a circulating hole for circulating a heat exchange medium; at least one connecting block is arranged between any two adjacent heat exchange assemblies, and a through hole is formed in each connecting block. The two adjacent heat exchange assemblies are the first heat exchange assembly and the second heat exchange assembly, one end of the through hole communicates with the circulation hole in the first collecting pipe of the first heat exchange assembly, and the other end of the through hole communicates with the circulation hole in the first collecting pipe of the second heat exchange assembly. According to the heat exchanger, the first heat exchange assembly and the second heat exchange assembly are directly communicated through the connecting block, the situation that a connecting base and a pipeline are additionally arranged for communication is avoided, the occupied space of the heat exchanger is effectively reduced, circulation resistance is reduced, and the heat exchange performance is improved.

Description

Technical Field

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

[0002] Existing heat exchangers usually include a header and a plurality of heat exchange tubes (e.g., flat tubes) connected between two headers, wherein the header is used to distribute and collect the heat exchange medium in the heat exchange tubes. When designing a multi-row heat exchanger, the headers need to be connected by pipelines to achieve the flow of heat exchange medium from a header in one row of heat exchangers to a header in another row of heat exchangers.

[0003] In order to enhance the heat transfer effect of a heat exchanger (for example, a microchannel heat exchanger), the flat tubes in the heat exchanger are usually arranged in a double or multiple row structure in parallel. In the related art, in order to connect the manifolds in the double or multiple row structure, a connecting seat is usually provided on the manifolds in each row, and a plurality of connecting seats are connected through pipelines. The additional arrangement of connecting seats and pipelines will waste a lot of space, thereby increasing the overall external volume of the heat exchanger. In addition, the design of the connecting seats and pipelines will increase the flow path length of the heat exchange medium, so that the heat exchange medium is subjected to greater resistance during circulation, thereby reducing the heat transfer performance of the heat exchanger. Utility Model Content

[0004] The utility model provides a heat exchanger to solve the problem that the connection seat and pipelines on the heat exchanger in the prior art waste a lot of space and increase the flow resistance, thereby increasing the overall external volume of the heat exchanger and reducing the heat exchange performance.

[0005] In order to solve the above problems, the utility model provides a heat exchanger, including a connecting block and at least two groups of heat exchange components, each heat exchange component includes a first header, a second header, and a plurality of heat exchange tubes connected to the first header and the second header; the first header has a flow hole for circulating a heat exchange medium; wherein, at least one connecting block is arranged between any two adjacent groups of heat exchange components, and the connecting block has a through hole; the two adjacent groups of heat exchange components are respectively the first heat exchange component and the second heat exchange component, one end of the through hole is connected to the flow hole on the first header of the first heat exchange component, and the other end of the through hole is connected to the flow hole on the first header of the second heat exchange component.

[0006] Furthermore, the second collecting pipe has a circulation hole for circulating the heat exchange medium; there are at least two connecting blocks, wherein one end of the through hole of one connecting block is connected to the circulation hole on the second collecting pipe of the first heat exchange component, and the other end of the through hole is connected to the circulation hole on the second collecting pipe of the second heat exchange component.

[0007] Furthermore, each connection block has N through holes arranged at intervals, N ≥ 2, and each first collecting pipe has at least one flow group, and a flow group includes N flow holes arranged at intervals; the number of connection blocks is the same as the total number of flow groups on each first collecting pipe, and the N through holes on each connection block are connected one-to-one with the N flow holes in a flow group.

[0008] Furthermore, each connection block has a through hole, each first collecting pipe has at least one flow group, a flow group includes N flow holes arranged at intervals, N ≥ 2; the number of connection blocks is the same as the total number of flow groups on each first collecting pipe, and the through hole on each connection block is connected to the N flow holes in a flow group at the same time.

[0009] Furthermore, the connecting block includes a mating portion and a fixing portion arranged on the mating portion, and the through hole passes through both sides of the mating portion; one side of the mating portion is adhered to and welded to the outer periphery of the first collecting pipe of the first heat exchange component, and the other side of the mating portion is adhered to and welded to the outer periphery of the first collecting pipe of the second heat exchange component.

[0010] Furthermore, the fixing part is fixedly connected to the outer periphery of the first collecting tube of the first heat exchange component and the outer periphery of the first collecting tube of the second heat exchange component by welding; the two corresponding side surfaces of the matching part are arcuate surfaces, the arcuate surfaces of the matching part are sealed with the outer peripheral surface of the first collecting tube, and the shape of the arcuate surfaces of the matching part is adapted to the shape of the outer peripheral surface of the first collecting tube; the two corresponding side surfaces of the fixing part are arcuate surfaces, the arcuate surfaces of the fixing part are abutted with the outer peripheral surface of the first collecting tube, and the shape of the arcuate surfaces of the fixing part is adapted to the shape of the outer peripheral surface of the first collecting tube.

[0011] Furthermore, the two arcuate surfaces corresponding to the matching part are respectively the first arcuate surface and the second arcuate surface, the first arcuate surface and the second arcuate surface are symmetrically arranged, the distance between the two ends of the first arcuate surface in a direction perpendicular to the axial direction of the first collecting pipe is the same as the distance between the two ends of the second arcuate surface in a direction perpendicular to the axial direction of the first collecting pipe, both are X1; the length of the matching part parallel to the axial direction of the first collecting pipe is X2; the maximum aperture of the through hole is X3; the length of the fixing part parallel to the axial direction of the first collecting pipe is X5; wherein, X1≥2X3, X2≥X5≥X3.

[0012] Furthermore, 10mm≤X5≤20mm; the shortest distance between the first curved surface and the second curved surface is X4, 3mm≤X4≤15mm.

[0013] Furthermore, the through hole is one of a circular hole, a square hole or a triangular hole; and the fixing portion and / or the matching portion has a solder groove or a soldering through hole for accommodating solder.

[0014] Further, along the radial direction of the first header, the cross section of the through hole covers the cross section of the flow hole.

[0015] Applying the technical solution of the utility model, the utility model provides a heat exchanger, including a connecting block and at least two groups of heat exchange components, each heat exchange component includes a first header, a second header, and a plurality of heat exchange tubes connected to the first header and the second header; the first header has flow holes for circulating heat exchange medium; wherein, at least one connecting block is arranged between any two adjacent groups of heat exchange components, and the connecting block has a through hole; the two adjacent groups of heat exchange components are respectively the first heat exchange component and the second heat exchange component, one end of the through hole is connected to the flow hole on the first header of the first heat exchange component, and the other end of the through hole is connected to the flow hole on the first header of the second heat exchange component. The utility model realizes direct connection between the first heat exchange component and the second heat exchange component by setting a connecting block, avoids the additional setting of a connecting seat and a pipeline for connection, thereby effectively reducing the space occupied by the heat exchanger, reducing the flow resistance and improving the heat exchange performance; in actual use, the number and size of the through holes can be flexibly set to increase the flow area, reduce the flow resistance of the heat exchange medium, and improve the heat exchange performance of multiple groups of heat exchange components; in actual use, the connecting block can be preliminarily positioned by welding methods such as soldering, so that the through hole and the flow hole are connected in a central manner, and then the connection block can be ensured to be sealed and connected to the first heat exchange component and the second heat exchange component respectively by furnace welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 The external structure schematic diagram of the heat exchanger provided by the embodiment of the utility model is shown;

[0018] Figure 2 The specific structural schematic diagram of the heat exchanger provided by the embodiment of the utility model at a left viewing angle is shown;

[0019] Figure 3 A schematic diagram showing the specific structure of a connection block provided in an embodiment of the utility model is shown;

[0020] Figure 4 Shows Figure 3 The structural diagram of the middle connection block under the main viewing angle;

[0021] Figure 5 Shows Figure 3 A schematic diagram of the structure of the middle connecting block from a top-down perspective;

[0022] Figure 6 Shows Figure 3 The structural diagram of the middle connection block from the left perspective;

[0023] Figure 7 A schematic structural diagram of a connecting block provided by another embodiment of the utility model in a main viewing angle is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Connecting block; 11. Through hole; 12. Matching portion; 121. First arcuate surface; 122. Second arcuate surface; 13. Fixing portion;

[0026] 20. heat exchange assembly; 21. first header; 22. second header; 23. heat exchange tube;

[0027] 30. A first heat exchange component;

[0028] 40. A second heat exchange component. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 7 As shown, an embodiment of the utility model provides a heat exchanger, including a connecting block 10 and at least two groups of heat exchange components 20, each heat exchange component 20 includes a first header 21, a second header 22, and a plurality of heat exchange tubes 23 connected to the first header 21 and the second header 22; the first header 21 has a flow hole for circulating a heat exchange medium; wherein, at least one connecting block 10 is arranged between any two adjacent groups of heat exchange components 20, and the connecting block 10 has a through hole 11; the two adjacent groups of heat exchange components 20 are respectively a first heat exchange component 30 and a second heat exchange component 40, one end of the through hole 11 is connected to the flow hole on the first header 21 of the first heat exchange component 30, and the other end of the through hole 11 is connected to the flow hole on the first header 21 of the second heat exchange component 40.

[0031] In a specific implementation of the utility model, the connection block 10 is fixedly and sealedly connected to the first header 21 of the first heat exchange assembly 30 and the first header 21 of the second heat exchange assembly 40 by welding. By setting the connection block 10 to be fixedly and sealedly connected to the first heat exchange assembly 30 and the second heat exchange assembly 40 by welding, not only the first heat exchange assembly 30 and the second heat exchange assembly 40 are relatively fixed, but also the overall sealing and working reliability of the heat exchanger are guaranteed.

[0032] The utility model realizes direct connection between the first heat exchange component 30 and the second heat exchange component 40 by setting a connecting block 10, avoids the additional setting of a connecting seat and a pipeline for connection, thereby effectively reducing the space occupied by the heat exchanger, reducing the flow resistance and improving the heat exchange performance; in actual use, the number and size of the through holes 11 can be flexibly set to increase the flow area, reduce the flow resistance of the heat exchange medium, and improve the heat exchange performance of multiple groups of heat exchange components 20; in actual use, the connecting block 10 can be preliminarily positioned by welding methods such as soldering, so that the through hole 11 is connected to the flow hole in a central manner, and then the connecting block 10 is ensured to be sealed and connected to the first heat exchange component 30 and the second heat exchange component 40 respectively by furnace welding.

[0033] like Figure 1 and Figure 2 As shown, the second header 22 has a flow hole for circulating the heat exchange medium; there are at least two connection blocks 10, wherein one end of the through hole 11 of one connection block 10 is connected to the flow hole on the second header 22 of the first heat exchange assembly 30, and the other end of the through hole 11 is connected to the flow hole on the second header 22 of the second heat exchange assembly 40. In this way, the connection block 10 not only fixes the first heat exchange assembly 30 and the second heat exchange assembly 40 relatively, but also ensures the sealing and working reliability of the heat exchanger as a whole.

[0034] In a specific implementation of the present invention, the exterior of the connection block 10 is fixedly and sealedly connected to the second header 22 of the first heat exchange assembly 30 and the second header 22 of the second heat exchange assembly 40 respectively by welding.

[0035] like Figure 3 and Figure 4As shown, each connection block 10 has N through holes 11 arranged at intervals, N ≥ 2, each first header 21 has at least one flow group, and one flow group includes N flow holes arranged at intervals; the number of connection blocks 10 is the same as the total number of flow groups on each first header 21, and the N through holes 11 on each connection block 10 are connected to the N flow holes in one flow group in a one-to-one correspondence. By setting the N through holes 11 on a connection block 10 to be connected to the N flow holes in one flow group in a one-to-one correspondence, the heat exchange medium can be evenly circulated among multiple heat exchange components 20, thereby improving the heat exchange efficiency.

[0036] It should be noted that: in a specific embodiment of the present invention, a connection block 10 has N through holes 11 arranged at intervals, N ≥ 2, and the first collecting pipe 21 and the second collecting pipe 22 respectively have at least one flow group, and a flow group includes N flow holes arranged at intervals; the number of connection blocks 10 is the same as the total number of flow groups on the first collecting pipe 21 and the second collecting pipe 22, and the N through holes 11 on a connection block 10 are connected one-to-one with the N flow holes in a flow group.

[0037] like Figure 7 As shown, each connection block 10 has a through hole 11, each first header 21 has at least one flow group, and one flow group includes N flow holes arranged at intervals, N ≥ 2; the number of connection blocks 10 is the same as the total number of flow groups on each first header 21, and the through hole 11 on each connection block 10 is simultaneously connected with the N flow holes in one flow group. By setting a through hole 11 on a connection block 10 to be simultaneously connected with the N flow holes in one flow group, the disturbance of the heat exchange medium between the through hole 11 and the flow holes can be increased, so that the heat exchange medium can be uniformly circulated among multiple heat exchange components 20, thereby improving the heat exchange efficiency.

[0038] It should be noted that: in another specific embodiment of the present utility model, Figure 7 As shown, a connection block 10 has a through hole 11, and the first collecting pipe 21 and the second collecting pipe 22 respectively have at least one flow group, and one flow group includes N flow holes arranged at intervals, N ≥ 2; the number of connection blocks 10 is the same as the total number of flow groups on the first collecting pipe 21 and the second collecting pipe 22, and the through hole 11 on a connection block 10 is connected to the N flow holes in one flow group at the same time.

[0039] In another specific embodiment of the present invention (not shown in the drawings), a connection block 10 has n through holes 11, and the first collecting pipe 21 and the second collecting pipe 22 respectively have n flow groups, each flow group includes N flow holes arranged at intervals, N ≥ 2; the number of connection blocks 10 is the same as the total number of flow groups on the first collecting pipe 21 and the second collecting pipe 22, and the n through holes 11 on a connection block 10 are simultaneously connected to the N flow holes in the n flow groups.

[0040] It can be understood that: comparing the two technical solutions of having N through holes 11 on a connecting block 10 and having one through hole 11 on a connecting block 10, the technical solution of having N through holes 11 has less effect on the overall strength and rigidity of the connecting block 10, so that the connecting block 10 can only undergo a small deformation during welding, but the drilling process of multiple through holes 11 is relatively cumbersome, and each through hole 11 needs to be precisely positioned, resulting in low processing efficiency; while the technical solution of having one through hole 11 on a connecting block 10 can effectively improve the uniform circulation of the heat exchange medium, is easy to process and has low requirements for processing accuracy, and is suitable for high-efficiency large-scale processing, but has a greater impact on the overall strength and rigidity of the connecting block 10, and the connecting block 10 may undergo a large deformation during welding; therefore, the above two technical solutions can be flexibly selected or mixed according to actual usage requirements.

[0041] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the connection block 10 includes a matching portion 12 and a fixing portion 13 arranged on the matching portion 12, and the through hole 11 passes through both sides of the matching portion 12; one side of the matching portion 12 is attached to the outer periphery of the first header 21 of the first heat exchange assembly 30 and welded and sealed, and the other side of the matching portion 12 is attached to the outer periphery of the first header 21 of the second heat exchange assembly 40 and welded and sealed; the fixing portion 13 is fixedly connected to the outer periphery of the first header 21 of the first heat exchange assembly 30 and the outer periphery of the first header 21 of the second heat exchange assembly 40 by welding. By setting the fixing portion 13 to be fixedly connected to the outer periphery of the first header 21 of the first heat exchange assembly 30 and the second heat exchange assembly 40 by welding, the stability of the connection between the connection block 10 and the heat exchange assembly is ensured, and the heat exchanger can effectively withstand the pressure and impact in the operation of the system, thereby extending the service life of the equipment.

[0042] In actual use, the fixing part 13 can be preliminarily fixed to the outer periphery of the first collecting pipe 21 of the first heat exchange component 30 and the outer periphery of the first collecting pipe 21 of the second heat exchange component 40 by welding methods such as soldering and brazing, so as to preliminarily position the connecting block 10 so that the through hole 11 is connected with the flow hole in a central manner, and then furnace welding or the like is used to ensure that the matching part 12 is sealedly connected to the first heat exchange component 30 and the second heat exchange component 40 respectively.

[0043] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in a specific embodiment of the present invention, the matching portion 12 is a quadrangular prism-like structure, the fixing portion 13 is a step-like structure, and the top surface of the step-like structure is fixedly connected to the middle of the matching portion 12. By setting the matching portion 12 to be a quadrangular prism-like structure and the fixing portion 13 to be a step-like structure, the structural design is reasonable, thereby facilitating the manufacture and installation of the connecting block 10, reducing production costs and improving production efficiency.

[0044] like Figure 3 and Figure 6 As shown, the two corresponding side surfaces of the matching part 12 are arcuate surfaces, the arcuate surface of the matching part 12 is sealed with the outer peripheral surface of the first header 21, and the shape of the arcuate surface of the matching part 12 is adapted to the shape of the outer peripheral surface of the first header 21; the two corresponding side surfaces of the fixing part 13 are arcuate surfaces, the arcuate surface of the fixing part 13 is abutted with the outer peripheral surface of the first header 21, and the shape of the arcuate surface of the fixing part 13 is adapted to the shape of the outer peripheral surface of the first header 21. This arrangement further improves the sealing and matching effect of the matching part 12 and the fixing part 13 with the first header 21, ensures the sealing performance of the connection block 10 between the first heat exchange component 30 and the second heat exchange component 40, effectively prevents the leakage of the heat exchange medium, and improves the safety and stability of the system.

[0045] In addition, by providing the arc-shaped surfaces of the mating portion 12 and the fixing portion 13, a close fit is achieved, thereby effectively improving the contact heat exchange efficiency between the first heat exchange component 30 and the second heat exchange component 40; in summary, the structural design features of the connecting block 10 enable it to have good sealing performance, structural stability and heat exchange efficiency, so that it can be effectively used in heat exchange equipment, thereby improving the reliability and stability of the heat exchange equipment.

[0046] like Figure 4 , Figure 5 and Figure 6As shown, the two arcuate surfaces corresponding to the matching portion 12 are respectively the first arcuate surface 121 and the second arcuate surface 122, the first arcuate surface 121 and the second arcuate surface 122 are symmetrically arranged, the distance between the two ends of the first arcuate surface 121 in the axial direction perpendicular to the first manifold 21 is the same as the distance between the two ends of the second arcuate surface 122 in the axial direction perpendicular to the first manifold 21, both of which are X1; the length of the matching portion 12 in the axial direction parallel to the first manifold 21 is X2; the maximum aperture of the through hole 11 is X3; the length of the fixing portion 13 in the axial direction parallel to the first manifold 21 is X5; wherein, X1≥2X3, X2≥X5≥X3. This arrangement not only makes the strength and rigidity of the connection block 10 meet the actual welding requirements, but also ensures that the size design of the connection block 10 is reasonable.

[0047] like Figure 4 , Figure 5 and Figure 6 As shown, 10mm≤X5≤20mm; the shortest distance between the first curved surface 121 and the second curved surface 122 is X4, 3mm≤X4≤15mm. This arrangement makes the structural size design of the connecting block 10 reasonable and the connection strength reliable, which can effectively withstand the pressure and impact during the operation of the heat exchanger and extend the service life of the equipment.

[0048] Optionally, the through hole 11 is a circular hole, a square hole or a triangular hole; the fixing portion 13 and / or the matching portion 12 are provided with a solder groove or a welding through hole for accommodating solder. By providing the fixing portion 13 and / or the matching portion 12 with a solder groove or a welding through hole for accommodating solder, not only can the solder be effectively accommodated, but also the welding area is increased and the welding firmness is improved; by flexibly selecting the shape of the through hole 11, it is beneficial to evenly separate the heat exchange medium when it flows, and the flow rate of the heat exchange medium can be increased, thereby increasing the heat exchange efficiency.

[0049] Optionally, one side of the matching portion 12 is sealed and matched with the outer periphery of the first header 21 of the first heat exchange assembly 30 by furnace welding, and the other side of the matching portion 12 is sealed and matched with the outer periphery of the first header 21 of the second heat exchange assembly 40 by furnace welding. By adopting the furnace welding method, the sealing performance and welding strength are further improved.

[0050] It should be noted that before furnace welding, the fixing portion 13 can be preliminarily fixed to the outer periphery of the first collecting pipe 21 of the first heat exchange component 30 and the outer periphery of the first collecting pipe 21 of the second heat exchange component 40 by soldering, brazing or other welding methods to preliminarily position the connecting block 10 so that the through hole 11 is connected with the flow hole in a central manner and effectively avoids the displacement of the connecting block 10 during furnace welding.

[0051] Specifically, along the radial direction of the first header 21, the cross section of the through hole 11 covers the cross section of the flow hole (for example, when projected along the radial direction of the first header 21, the cross section projection of the through hole 11 covers the cross section projection of the flow hole). This arrangement can reduce the flow resistance and improve the heat exchange effect.

[0052] Specifically, the radial cross-sectional dimension of the through hole 11 is smaller than that of the circulation hole to throttle the heat exchange medium; or, the radial cross-sectional dimension of the through hole 11 is larger than that of the circulation hole to increase the circulation area of ​​the heat exchange medium.

[0053] It is worth noting that: by setting the radial cross-sectional dimension of the through hole 11 to be smaller than the radial cross-sectional dimension of the circulation hole, the through hole 11 of the connecting block 10 can play a throttling role, which is beneficial for the heat exchange medium (for example, refrigerant) to flow evenly from the first heat exchange component 30 to the second heat exchange component 40; by setting the radial cross-sectional dimension of the through hole 11 to be larger than the radial cross-sectional dimension of the circulation hole, the adverse effects of the docking assembly tolerance between the connecting block 10 and the first heat exchange component 30 and the second heat exchange component 40 are avoided, thereby increasing the circulation area of ​​the heat exchange medium.

[0054] In summary, the utility model provides a heat exchanger. The utility model realizes direct connection between the first heat exchange component 30 and the second heat exchange component 40 by setting a connecting block 10, avoids the additional setting of a connecting seat and a pipeline for connection, thereby effectively reducing the space occupied by the heat exchanger, reducing the flow resistance and improving the heat exchange performance; by setting the connecting block 10, the first heat exchange component 30 and the second heat exchange component 40 are respectively fixedly and sealed connected by welding, thereby ensuring the overall sealing and working reliability of the heat exchanger; in actual use, the number and size of the through holes 11 can be flexibly set to increase the flow area, reduce the flow resistance of the heat exchange medium, and improve the heat exchange performance of multiple groups of heat exchange components 20; in actual use, the connecting block 10 can be preliminarily positioned by welding methods such as soldering, so that the through hole 11 is connected to the flow hole in a central manner, and then the connection block 10 is ensured to be sealed and connected to the first heat exchange component 30 and the second heat exchange component 40 respectively by furnace welding.

[0055] 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.

[0056] 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 utility model. 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 art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the 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, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present utility model, it needs to 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 utility model 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 utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] 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.

[0059] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0060] 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: The invention comprises a connecting block (10) and at least two groups of heat exchange components (20), each of the heat exchange components (20) comprising a first header (21), a second header (22), and a plurality of heat exchange tubes (23) connected to the first header (21) and the second header (22); the first header (21) has a flow hole for circulating a heat exchange medium; wherein at least one connecting block (10) is arranged between any two adjacent groups of heat exchange components (20), the connecting block (10) having a through hole (11); the two adjacent groups of heat exchange components (20) are respectively a first heat exchange component (30) and a second heat exchange component (40), one end of the through hole (11) is connected to the flow hole on the first header (21) of the first heat exchange component (30), and the other end of the through hole (11) is connected to the flow hole on the first header (21) of the second heat exchange component (40).

2. The heat exchanger according to claim 1, characterized in that: The second collecting pipe (22) has a circulation hole for circulating a heat exchange medium; there are at least two connecting blocks (10), wherein one end of the through hole (11) of one connecting block (10) is connected to the circulation hole on the second collecting pipe (22) of the first heat exchange component (30), and the other end of the through hole (11) is connected to the circulation hole on the second collecting pipe (22) of the second heat exchange component (40).

3. The heat exchanger according to claim 1, characterized in that: Each of the connection blocks (10) has N through holes (11) arranged at intervals, N≥2, and each of the first current collecting pipes (21) has at least one flow group, and one flow group includes N flow holes arranged at intervals; the number of the connection blocks (10) is the same as the total number of the flow groups on each of the first current collecting pipes (21), and the N through holes (11) on each of the connection blocks (10) are connected to the N flow holes in one flow group in a one-to-one correspondence.

4. The heat exchanger according to claim 1, characterized in that: Each of the connection blocks (10) has one through hole (11), and each of the first current collecting pipes (21) has at least one flow group, wherein one flow group includes N flow holes arranged at intervals, and N is greater than or equal to 2; the number of the connection blocks (10) is the same as the total number of the flow groups on each of the first current collecting pipes (21), and the through hole (11) on each of the connection blocks (10) is simultaneously connected to the N flow holes in one flow group.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that: The connecting block (10) comprises a matching portion (12) and a fixing portion (13) arranged on the matching portion (12); the through hole (11) passes through both sides of the matching portion (12); one side of the matching portion (12) is in contact with the outer periphery of the first collecting pipe (21) of the first heat exchange component (30) and is welded and sealed, and the other side of the matching portion (12) is in contact with the outer periphery of the first collecting pipe (21) of the second heat exchange component (40) and is welded and sealed.

6. The heat exchanger according to claim 5, characterized in that The fixing portion (13) is fixedly connected to the outer periphery of the first collecting tube (21) of the first heat exchange component (30) and the outer periphery of the first collecting tube (21) of the second heat exchange component (40) by welding; the two side surfaces corresponding to the matching portion (12) are arcuate surfaces, the arcuate surface of the matching portion (12) is sealed with the outer periphery of the first collecting tube (21), and the shape of the arcuate surface of the matching portion (12) is adapted to the shape of the outer periphery of the first collecting tube (21); the two side surfaces corresponding to the fixing portion (13) are arcuate surfaces, the arcuate surface of the fixing portion (13) is abutted with the outer periphery of the first collecting tube (21), and the shape of the arcuate surface of the fixing portion (13) is adapted to the shape of the outer periphery of the first collecting tube (21).

7. The heat exchanger according to claim 6, characterized in that The two arcuate surfaces corresponding to the matching portion (12) are respectively a first arcuate surface (121) and a second arcuate surface (122); the first arcuate surface (121) and the second arcuate surface (122) are symmetrically arranged; the distance between the two ends of the first arcuate surface (121) in a direction perpendicular to the axial direction of the first collecting tube (21) is the same as the distance between the two ends of the second arcuate surface (122) in a direction perpendicular to the axial direction of the first collecting tube (21), both being X1; the length of the matching portion (12) in a direction parallel to the axial direction of the first collecting tube (21) is X2; the maximum aperture of the through hole (11) is X3; the length of the fixing portion (13) in a direction parallel to the axial direction of the first collecting tube (21) is X5; wherein X1≥2X3, X2≥X5≥X3.

8. The heat exchanger according to claim 7, characterized in that 10mm≤X5≤20mm; the shortest distance between the first arcuate surface (121) and the second arcuate surface (122) is X4, 3mm≤X4≤15mm.

9. The heat exchanger according to any one of claims 6 to 8, characterized in that: The through hole (11) is one of a circular hole, a square hole or a triangular hole; the fixing portion (13) and / or the matching portion (12) has a solder groove or a soldering through hole for accommodating solder.

10. The heat exchanger according to claim 3 or 4, characterized in that: Along the radial direction of the first header (21), the cross section of the through hole (11) covers the cross section of the flow hole.

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