Flow path module

Abstract

The utility model provides a flow path module which comprises a connecting pipe and a flow path main body formed by stacking a plurality of layers of plates, the flow path main body is provided with a circulation cavity and a switching port communicated with the circulation cavity, the switching port is formed on the outermost plate, and the end part of the connecting pipe is welded in the switching port. And a plurality of solder grooves are formed between the outer surface of the connecting pipe and the inner surface of the adapter. By adopting the technical scheme provided by the utility model, the welding area between the connecting pipe and the adapter is increased through the plurality of welding flux grooves between the outer surface of the connecting pipe and the inner surface of the adapter, and molten welding flux enters the welding flux grooves, so that the welding effect of the connecting pipe and the flow path main body is improved. And compared with the situation that auxiliary welding needs to be conducted through a connector in the prior art, auxiliary welding does not need to be conducted through other auxiliary parts such as the connector additionally, the welding efficiency of the connecting pipe is improved, and the welding cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of flow path module technology, and more specifically, to a flow path module. Background Technology

[0002] In existing flow path modules, connectors are often used for auxiliary welding when welding the connecting pipes. A common design involves a constricted end and an flared end. The constricted end of the connector extends into the adapter and is welded to the opening of the adapter. The connecting pipe extends into the flared end of the connector and is welded to the flared end. It is understandable that non-reducing connectors can also be used depending on the specific circumstances.

[0003] However, this welding method requires a large installation area and will create a large area to be welded (welding one end of the joint to the opening of the adapter, and welding the other end of the joint to the outer periphery of the pipe). There are many points to be welded, resulting in high welding risk, low efficiency and poor seismic resistance. Utility Model Content

[0004] This utility model provides a flow path module to improve the welding efficiency and welding effect of the connector and the flow path body.

[0005] To achieve the above objectives, this utility model provides a flow path module, which includes a connecting pipe and a flow path body formed by stacking multiple layers of plates. The flow path body has a flow cavity and an interface communicating with the flow cavity. The interface is formed on the outermost plate. The end of the connecting pipe is welded into the interface. Multiple solder grooves are provided between the outer surface of the connecting pipe and the inner surface of the interface.

[0006] Furthermore, multiple solder grooves are formed on the outer periphery of the connector, and the solder grooves extend along the axial direction of the connector.

[0007] Furthermore, the cross-sectional shape of the solder bath includes a fan shape, and the maximum depth of the solder bath in the radial direction of the connecting pipe is 0.01mm to 0.2mm.

[0008] Furthermore, the connector includes an outer section, a transition section, and a narrowing section connected in sequence. Multiple solder grooves are formed on the outer periphery of the narrowing section. The maximum outer diameter of the narrowing section is smaller than the outer diameter of the outer section. The radial dimension of the transition section gradually decreases in the direction from the outer section to the narrowing section. The transition section mates with the corresponding plate stop. The two ends of the solder grooves extend to the two ends of the narrowing section in the axial direction.

[0009] Furthermore, the stacking direction of the multilayer boards is parallel to the axis of the nozzle, the adapter is located on the upper end of the board in the stacking direction, and the end of the nozzle passes through the adapter and extends into the flow cavity.

[0010] Furthermore, the adapter is a stepped opening comprising a first segment and a second segment connected to each other, the second segment communicating with the flow cavity and having an inner diameter larger than that of the first segment.

[0011] Furthermore, the flow path module includes a welding ring, which is sleeved on the outer periphery of the connector located inside the flow path body. The wire diameter of the welding ring is A, and the length of the end of the connector extending into the flow cavity is B, where B > A / 2.

[0012] Furthermore, the flow path module includes a welding ring, which is sleeved on the outer periphery of the connector located inside the flow path body. The wire diameter of the welding ring is A, and an abutment surface is formed between the first segment and the second segment. The length of the end of the connector passing through the abutment surface is D, where D > A / 2.

[0013] Furthermore, multiple solder troughs are formed on the outer periphery of the connector, the length of the end of the connector extending into the flow cavity is B, the thickness of the plate with the adapter is C in the stacking direction of the flow path body, and the extension length of the solder trough is greater than or equal to B+C.

[0014] Furthermore, there are multiple adapters, and each adapter has a corresponding connecting pipe welded inside. The multiple adapters are distributed on at least two different surfaces of the flow path body.

[0015] Furthermore, there is an interference fit in the area between the connector and the adapter where no solder groove is formed.

[0016] The present invention provides a flow path module, which includes a connecting pipe and a flow path body formed by stacking multiple layers of plates. The flow path body has a flow cavity and an interface communicating with the flow cavity. The interface is formed on the outermost plate. The end of the connecting pipe is welded into the interface. There are multiple solder grooves between the outer surface of the connecting pipe and the inner surface of the interface.

[0017] This solution increases the welding area between the connector and the adapter by using multiple solder grooves between the outer surface of the connector and the inner surface of the adapter. The molten solder enters the solder grooves, thereby improving the welding effect between the connector and the flow path body. Furthermore, compared to existing technologies that require auxiliary welding via joints, this solution eliminates the need for additional auxiliary components such as joints, thus improving welding efficiency and reducing welding costs. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 The flow path module provided by an embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 The main view;

[0021] Figure 3 It shows Figure 2 Enlarged view of the mid-section;

[0022] Figure 4 It shows Figure 1 A schematic diagram of the structure of the central pipe;

[0023] Figure 5 It shows Figure 4 Top view.

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

[0025] 10. Flow path body; 101. Flow cavity; 1011. Flared section; 102. Adapter; 11. Sheet metal;

[0026] 20. Connecting pipe; 201. Solder tank; 21. External connection section; 22. Transition section; 23. Narrowing section;

[0027] 30. Weld ring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] like Figures 1 to 5As shown, an embodiment of this utility model provides a flow path module, which is applied to an air conditioning system, for example, installed inside the outdoor unit of an air conditioning system. The outdoor unit typically houses components forming the refrigerant circuit, such as a compressor, storage tank, outdoor heat exchanger, oil separator, and various valves, as well as electrical installation units. The flow path module of this application includes multiple connecting pipes 20 and a flow path body 10 formed by stacking multiple layers of sheet metal 11. The multiple connecting pipes 20 are used to connect to various components in the compressor, storage tank, outdoor heat exchanger, oil separator, various valves (four-way valve, electronic expansion valve, shut-off valve, etc.), and other piping in the refrigerant flow path. The flow path module is formed by stacking multiple layers of sheet metal 11, and is typically installed horizontally on the indoor unit, with an overall flat structure. This optimizes the piping structure in the indoor unit, improves piping integration, reduces piping space occupation, and reduces the overall volume of the outdoor unit.

[0030] The flow path body 10 has a flow cavity 101 and an interface 102 communicating with the flow cavity 101. The interface 102 is formed on the outermost plate 11. The end of the pipe 20 is welded into the interface 102. There are multiple solder grooves 201 between the outer surface of the pipe 20 and the inner surface of the interface 102.

[0031] Since the flow path module of this application is formed by stacking multiple layers of sheet metal 11, and has an overall flat design, the adapter 102 is located on the outermost single layer of sheet metal 11, which facilitates the processing of the adapter 102. The depth of the adapter 102 is no greater than the thickness of the single layer of sheet metal 11, so the depth of the adapter 102 is small, and the welding depth between the pipe 20 and the adapter 102 is limited. The flow path module is used in the refrigerant flow path of an air conditioning system, and when the flow path module is installed inside the outdoor unit, the pipe 20 supports the flow path body 10. Therefore, it is necessary to ensure the welding sealing performance and welding strength between the pipe 20 and the adapter 102. Given the limited welding depth, in order to improve the welding sealing performance and welding strength, this application designs multiple solder grooves 201 between the outer surface of the pipe 20 and the inner surface of the adapter 102. These solder grooves 201 can be evenly distributed circumferentially along the central axis of the pipe 20. Guided by the solder grooves 201, the solder can easily cover the entire contact surface between the adapter 102 and the pipe 20, improving the welding sealing performance and welding strength.

[0032] In this embodiment, the solder trough 201 facilitates the entry of solder between the connector and the adapter, thereby improving the welding effect. Furthermore, the multiple solder troughs 201 between the outer surface of the connector 20 and the inner surface of the adapter 102 increase the welding area between the connector 20 and the adapter 102. The molten solder enters the solder trough 201, further improving the welding effect between the connector 20 and the flow path body 10. Moreover, compared with the prior art, which requires auxiliary welding through a connector, this embodiment does not require additional auxiliary components such as connectors for auxiliary welding, which is beneficial to improving the welding efficiency of the connector 20 and reducing welding costs.

[0033] In this case, the area between the connector 20 and the adapter 102 where no solder groove 201 is formed is transitionally fitted. Since there is a risk of the connector falling off when welding, it is preferable that the area between the connector 20 and the adapter 102 where no solder groove 201 is formed is interference fitted.

[0034] This configuration ensures the reliability and stability of the connector 20 within the adapter 102, while also guaranteeing normal capillary flow of solder within the solder tank 201. This allows the solder to flow from one side to the other, filling the solder tank 201 and ensuring the welding strength between the connector 20 and the plate on which the adapter 102 is located. It also prevents the connector 20 from shifting or sliding out of the adapter 102 after installation and before welding, thus helping to ensure consistent welding results and batch welding performance.

[0035] like Figures 1 to 3 As shown, the stacking direction of the multilayer board 11 is parallel to the axis of the tube 20. The adapter 102 is located on the upper end of the board 11 in the stacking direction. The flow path module includes a welding ring 30. The end of the tube 20 passes through the adapter 102 and extends into the flow cavity 101. The welding ring 30 is sleeved on the outer periphery of the tube 20 and abuts against the inner wall of the board facing the flow cavity 101.

[0036] In this embodiment, the welding ring 30 melts during the welding process. The resulting solder welds the inner opening of the adapter 102 to the outer periphery of the connector 20. The molten solder flows from the inside of the adapter 102 along the extension direction of the solder grooves 201 to the outside of the adapter 102, filling multiple solder grooves 201 to achieve welding between the outer periphery of the connector 20 and the inner surface of the adapter 102. Furthermore, placing the welding ring 30 internally allows operators to visually assess the welding effect, improving the defect detection rate.

[0037] It should be noted that in the prior art, the welding of the nozzle 20 to the flow path body 10 generally adopts spot welding, that is, spot welding at the (inner and outer) openings of the nozzle 20 and the adapter 102, or spot welding at the (inner and outer) openings of the nozzle 20, the adapter 102, and the transition edge of the joint, to achieve welding of the nozzle 20 to the flow path body 10. Compared with this embodiment, its spot welding operation is more frequent and can only achieve multi-point welding at the transition position, resulting in low welding efficiency and generally poor welding effect.

[0038] Preferably, such as Figure 3 As shown, the flow cavity 101 has a flared section 1011 on the side facing the nozzle 20, and the ends of the welding ring 30 and the nozzle 20 that extend into the flow cavity 101 are both located within the flared section 1011.

[0039] Specifically, in this embodiment, multiple solder grooves 201 are formed on the outer periphery of the connector 20, which facilitates the processing of the solder grooves 201 and avoids the difficulty of processing when the solder grooves 201 are formed on the inner periphery of the adapter 102.

[0040] Furthermore, the solder trough 201 extends along the axial direction of the connector 20 to ensure the fluidity of the solder and the reliability of the welding effect enhancement. This ensures the welding effect between the connector 20 and the inner wall of the adapter 102 at different axial positions, and avoids situations where the solder cannot flow normally or can only weld and reinforce a certain section of the connector 20 in the axial direction when the solder trough 201 extends along the radial or circumferential direction of the connector 20. This ensures the reliability and stability of the welding reinforcement.

[0041] In this embodiment, the solder groove 201 extends parallel to the axial direction of the connector 20. It is understood that in other embodiments not shown in the figures, the solder groove 201 may extend spirally or meander along the axial direction of the connector 20 to further increase the welding area, which will not be listed here.

[0042] The solder bath 201 has a sector-shaped cross-section. Specifically, in this embodiment, the solder bath 201 has a triangular sector-shaped cross-section with an arc-shaped opening on its outer periphery. The two rectangular faces of the solder bath 201 intersect at the same position on the side away from the arc-shaped opening. This design is beneficial for balancing the fluidity of the solder and its strengthening effect on the welding process.

[0043] It is understood that in other embodiments not shown in the figure, the cross-sectional shape of the solder bath 201 can be adaptively adjusted according to the actual situation. For example, in an embodiment not shown in the figure, the cross-sectional shape of the solder bath 201 is a strip-shaped fan, with both the inner and outer sides of the tube 20 being arc-shaped in the radial direction. The outer side is an arc-shaped opening, and the inner side is an arc-shaped solid. The two arc-shaped surfaces are connected by two rectangular surfaces.

[0044] Furthermore, the solder trough 201 has a maximum groove depth of 0.01mm to 0.2mm in the radial direction of the connector 20. Within this range, the capillary effect of the solder trough 201 is better. If the groove depth is too large or too small, the capillary effect will be worse.

[0045] Specifically, this embodiment limits the depth of the solder groove to ensure the reliability of the solder filling the solder groove 201 and the reliability of the welding effect enhancement. It avoids the situation where the actual increase in welding area is small and the amount of solder (solder flowing into the solder groove 201) that can play a welding enhancement effect is small when the groove depth is too small (less than 0.01 mm), resulting in poor welding reinforcement effect. At the same time, it avoids the situation where the solder cannot fill the solder groove 201 due to the groove depth being too large (greater than 0.2 mm), thus affecting the welding reinforcement effect. It also avoids the situation where the excessive groove depth will affect the wall thickness and structural strength of the connector 20.

[0046] Preferably, the multiple solder grooves 201 are knurled on the outer periphery of the connector 20, which helps to ensure the regularity and consistency of the forming of the multiple solder grooves 201 on the outer periphery of the connector 20, and helps to improve processing efficiency.

[0047] Preferably, the welding ring 30 and the connecting pipe 20 are interference-fitted. This arrangement helps to limit the position of the welding ring 30, prevents the welding ring 30 from falling off during assembly and welding, and ensures the stability of the welding.

[0048] like Figure 3 As shown, in this embodiment, the length of the end of the connecting pipe 20 extending into the flow cavity 101 is B, and the wire diameter of the welding ring 30 is A. When the welding ring 30 abuts against the inner wall of the plate facing the flow cavity 101, B > A / 2.

[0049] In this embodiment, the welding ring 30 is disposed on the inner wall of the plate 11 at the end of the plate with the adapter 102 and located in the next plate 11 adjacent to the end plate 11. The end of the connecting pipe 20 passes through the adapter 102 on the end plate 11 and extends into the next plate 11 adjacent to the end plate 11 (i.e., the flow cavity 101). By limiting A and B, the interference support effect of the connecting pipe 20 on the welding ring 30 is ensured, avoiding the situation where the connecting pipe 20 cannot be interference-fitted with the welding ring 30 when B≤A / 2, or the connecting pipe 20 is just interference-fitted with the welding ring 30 but unstable. This setting can ensure that the welding ring 30 does not fall off the connecting pipe 20 and improve the welding reliability.

[0050] Preferably, in this embodiment, B > A.

[0051] Preferably, the adapter 102 can be a stepped opening including a first segment and a second segment connected to each other, facilitating further positioning and installation of the welding ring 30. Specifically, another embodiment of the present invention (not shown in the figure) provides a flow path module, which differs from the above embodiment in that the adapter 102 is a stepped opening including a first segment and a second segment connected to each other. The second segment communicates with the flow cavity 101 and has an inner diameter larger than that of the first segment. An abutment surface is formed between the first segment and the second segment, and the welding ring 30 is sleeved on the outer periphery of the connecting pipe 20 and abuts against the abutment surface. With this configuration, the bottom wall of the second segment supports the welding ring 30 while also positioning and installing the welding ring 30 through the abutment surface. Furthermore, the second segment can also limit the overflow of solder after the welding ring 30 melts. In this embodiment, the length of the end of the connecting pipe 20 passing through the abutment surface is D, where D > A / 2. In this embodiment, the welding ring 30 is at least partially disposed within the plate 11 at the end of the formed adapter 102. By limiting A and D, the interference fit between the connector 20 and the welding ring 30 is ensured, avoiding the situation where the connector 20 cannot fit the welding ring 30 or the connector 20 fits the welding ring 30 but is unstable when D≤A / 2. This arrangement ensures that the welding ring 30 does not fall off the connector 20, thus improving welding reliability.

[0052] like Figure 4 and Figure 5 As shown, in the stacking direction of the flow path body 10, the thickness of the plate 11 with the adapter 102 is C, and the extension length of the solder groove 201 is greater than or equal to B+C.

[0053] In this embodiment, the thickness C of the plate 11 with the adapter 102 can also be understood as the axial height of the adapter 102. By limiting the extension length of the solder groove 201 to be greater than or equal to B+C, it is ensured that after the end of the connector 20 extends into the flow cavity 101 to a height B, there is still a solder groove 201 whose height is completely adapted to the outer periphery of the adapter 102. This avoids the situation where after the end of the connector 20 extends into the flow cavity 101 to a height B, the extension height of the solder groove 201 adapted to the outer periphery of the adapter 102 is less than the height of the adapter 102, which would lead to a deterioration in the welding reinforcement effect. This ensures the reliability and stability of the welding.

[0054] like Figure 4 and Figure 5 As shown, the connector 20 includes an outer section 21, a transition section 22, and a narrowed section 23 connected in sequence. Multiple solder grooves 201 are formed on the outer periphery of the narrowed section 23. The maximum outer diameter of the narrowed section 23 is smaller than the outer diameter of the outer section 21. The radial dimension of the transition section 22 gradually decreases in the direction from the outer section 21 toward the narrowed section 23. The transition section 22 is fitted with the corresponding plate 11 stop. The two ends of the solder grooves 201 extend to the two ends of the narrowed section 23 in the axial direction.

[0055] The length of the connecting pipe 20 extending into the flow cavity 101 is limited by the stop of the transition section 22 and the end plate 11 with the adapter 102. This avoids excessive or insufficient insertion of the end of the connecting pipe 20, thus improving installation efficiency and ensuring installation reliability. In this embodiment, the axial length of the constricted section 23 is B+C, and the depth to which the connecting pipe 20 can be inserted into the adapter 102 is the axial length of the constricted section 23. The solder groove 201 extends to both ends of the constricted section 23 in the axial direction (i.e., the extension length of the solder groove 201 is equal to B+C), which facilitates the processing of the solder groove 201 and ensures consistent insertion.

[0056] like Figure 1 As shown, there are multiple adapters 102, and each adapter 102 has a corresponding connecting pipe 20 welded inside. The multiple adapters 102 are distributed on at least two different surfaces of the flow path body 10.

[0057] In this embodiment, the flow path body 10 includes 5 layers of plates 11. The flow path body 10 has two nozzle 20 lead-out surfaces that are opposite to each other in the stacking direction (i.e., the two end plates 11 are opposite to each other). The number of nozzles 20 and adapters 102 are corresponding and greater than or equal to 2. Multiple adapters 102 are distributed on the two end plates 11. The area inside the three plates in the middle forms a flow cavity 101. Multiple nozzles 20 pass through multiple adapters 102 from the nozzle 20 lead-out surfaces on both sides to realize the installation of nozzles 20 in the vertical direction and direct flow. There is no need for multiple bends, which achieves high integration and improves space utilization.

[0058] Specifically, since the shape of the plate 11 can be adjusted arbitrarily, the number of pipes 20 can be increased arbitrarily, and it can support more than two sides of the transfer pipes 20, which is conducive to achieving a high degree of integration of the flow path.

[0059] It should be noted that the number of outgoing surfaces of the connector 20, the number of connectors 20, the number and distribution of the adapter 102 can be adjusted according to the actual situation, and will not be listed here.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0062] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow path module, characterized in that, The flow path module includes a connector (20) and a flow path body (10) formed by stacking multiple layers of plates (11). The flow path body (10) has a flow cavity (101) and an interface (102) communicating with the flow cavity (101). The interface (102) is formed on the outermost plate (11). The end of the connector (20) is welded into the interface (102). There are multiple solder grooves (201) between the outer surface of the connector (20) and the inner surface of the interface (102).

2. The flow path module according to claim 1, characterized in that, A plurality of solder grooves (201) are formed on the outer periphery of the connector (20) and the solder grooves (201) extend along the axial direction of the connector (20).

3. The flow path module according to claim 1, characterized in that, The cross-sectional shape of the solder groove (201) includes a fan shape, and the maximum groove depth of the solder groove (201) in the radial direction of the connecting pipe (20) is 0.01mm to 0.2mm.

4. The flow path module according to claim 2, characterized in that, The connector (20) includes an outer section (21), a transition section (22), and a narrowing section (23) connected in sequence. A plurality of solder grooves (201) are formed on the outer periphery of the narrowing section (23). The maximum outer diameter of the narrowing section (23) is smaller than the outer diameter of the outer section (21). The radial dimension of the transition section (22) gradually decreases in the direction from the outer section (21) toward the narrowing section (23). The transition section (22) is stopped by the corresponding plate (11). The two ends of the solder grooves (201) extend to the two ends of the narrowing section (23) in the axial direction.

5. The flow path module according to claim 1, characterized in that, The stacking direction of the multilayer plates (11) is parallel to the axis of the tube (20). The adapter (102) is located on the plate (11) at the upper end of the stacking direction. The end of the tube (20) passes through the adapter (102) and extends into the flow cavity (101).

6. The flow path module according to claim 1, characterized in that, The adapter (102) is a stepped opening comprising a first segment and a second segment connected to each other. The second segment is connected to the flow cavity (101) and has an inner diameter larger than that of the first segment.

7. The flow path module according to claim 5, characterized in that, The flow path module includes a welding ring (30), which is sleeved on the outer periphery of the connecting pipe (20) located inside the flow path body (10). The wire diameter of the welding ring (30) is A, and the length of the end of the connecting pipe (20) extending into the flow cavity (101) is B, where B > A / 2.

8. The flow path module according to claim 6, characterized in that, The flow path module includes a welding ring (30), which is sleeved on the outer periphery of the connector (20) located inside the flow path body (10). The wire diameter of the welding ring (30) is A. An abutment surface is formed between the first segment and the second segment. The length of the end of the connector (20) passing through the abutment surface is D, where D > A / 2.

9. The flow path module according to claim 5, characterized in that, Multiple solder grooves (201) are formed on the outer periphery of the connector (20), the end of the connector (20) extends into the flow cavity (101) by a length of B, the plate (11) with the adapter (102) formed in the stacking direction of the flow path body (10) has a thickness of C, and the extension length of the solder groove (201) is greater than or equal to B+C.

10. The flow path module according to claim 1, characterized in that, There are multiple adapters (102), and each adapter (102) has a corresponding connecting pipe (20) welded inside it. The multiple adapters (102) are distributed on at least two different surfaces of the flow path body (10).

11. The flow path module according to claim 1, characterized in that, The area between the connector (20) and the adapter (102) where the solder groove (201) is not formed is an interference fit.

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