Refrigerant transportation module and heating and ventilation device
By using flexible stainless steel materials and small chamfering stamping technology, the problem of poor processing performance of stainless steel sheets in refrigerant transport modules has been solved, enabling the production of refrigerant transport modules with high reliability and low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI MIDEA BUILDING TECHNOLOGY CO LTD
- Filing Date
- 2024-08-27
- Publication Date
- 2026-05-26
AI Technical Summary
Existing stainless steel sheets have poor processing performance in refrigerant transport modules, are prone to cracking, have high welding costs and poor reliability, and are difficult to meet the welding requirements of refrigerant transport modules.
The first and second plates, made of flexible stainless steel, have lower yield strength and higher ductility. They are formed by stamping to create a chamfer of less than 1.8 mm, and combined with flanging and welding, they improve welding reliability and sealing.
This reduces the production difficulty of the refrigerant transport module, improves welding reliability and sealing, reduces the risk of refrigerant leakage, and lowers production costs.
Smart Images
Figure CN224285022U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air conditioning technology, and in particular to a refrigerant transport module and a heating, ventilation and air conditioning (HVAC) device. Background Technology
[0002] Related technologies indicate that, in existing technologies, stainless steel has high hardness and strength, complex phase transformation, and extremely poor processing and welding performance. Currently, punching holes in stainless steel sheets easily leads to cracking, and the large radius of curvature during stamping is unfavorable for welding the upper and lower sections of the refrigerant transport module; welding processes are costly, unreliable, and require high processing precision. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a refrigerant transport module having lower yield strength and higher ductility.
[0004] This utility model also proposes a heating, ventilation and air conditioning device having the above-mentioned refrigerant transport module.
[0005] According to the first aspect of the present invention, a refrigerant transport module includes: a first plate and a second plate, wherein the first plate and the second plate are connected and cooperate to define a channel, and both the first plate and the second plate are made of flexible stainless steel.
[0006] According to the refrigerant transport module of this utility model, by setting both the first plate and the second plate to be made of flexible stainless steel, the first plate and the second plate have lower yield strength and higher ductility, which reduces the production difficulty of the first plate and the second plate. It also allows for smaller stamping chamfers during the stamping and punching process, which is beneficial to the connection of the first plate and the second plate and improves the quality of the refrigerant transport module.
[0007] In some embodiments, a first recess is formed on the first plate, and a second recess is formed opposite to it on the second plate, wherein the first recess and the second recess cooperate to define the channel.
[0008] In some embodiments, the first recess is formed by stamping and the stamping chamfer R1 is not greater than 1.8 mm; the second recess is formed by stamping and the stamping chamfer R2 is not greater than 1.8 mm.
[0009] In some embodiments, one of the first recess and the second recess is formed with a through hole, and a flange is formed around the periphery of the through hole.
[0010] In some embodiments, the height of the flange is not less than 1.2 mm, and / or the wall thickness of the flange is not less than 1.2 mm.
[0011] In some embodiments, an adapter pipe is connected to the through hole, and one end of the adapter pipe is connected to the flange.
[0012] In some embodiments, the transfer tube is a flexible stainless steel tube, copper tube, or copper alloy tube.
[0013] In some embodiments, the yield strength of the flexible stainless steel is 140–180 MPa; and / or, the tensile strength of the flexible stainless steel is reduced to 400–600 MPa; and / or, the elongation of the flexible stainless steel is 50–80%; and / or, the yield strength ratio of the flexible stainless steel is less than 0.4; and / or, the hardness of the flexible stainless steel material is 100–120 Hv.
[0014] In some embodiments, the Md30 of the flexible stainless steel is -50℃ to -80℃.
[0015] In some embodiments, the flexible stainless steel is austenitic stainless steel, and the average grain size of the flexible stainless steel is 20 μm to 40 μm.
[0016] In some embodiments, the adapter pipe is welded to the flange, and / or the first plate is welded to the second plate.
[0017] Furthermore, the adapter pipe and the flange are welded together by a first solder or a second solder, and / or the first plate and the second plate are welded together by a first solder.
[0018] The heating, ventilation, and air conditioning device according to the second aspect of the present invention includes the refrigerant transport module according to the first aspect of the present invention.
[0019] The HVAC device according to this utility model improves the overall performance of the HVAC device and reduces the production cost of the HVAC device by setting the refrigerant transport module of the first aspect mentioned above.
[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a refrigerant transport module according to an embodiment of the present utility model;
[0022] Figure 2 yes Figure 1 This is a schematic diagram of another perspective of the refrigerant transport module shown.
[0023] Figure label:
[0024] 100. Refrigerant transport module; 1. First plate; 2. Second plate; 3. Channel; 31. First recess; 32. Second recess; 4. Adaptor pipe; 5. Through hole; 51. Flanged edge. Detailed Implementation
[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0026] The following is for reference. Figure 1 and Figure 2 A refrigerant transport module 100 according to a first aspect embodiment of the present invention is described.
[0027] like Figure 1 As shown, the refrigerant transport module 100 according to the first aspect of the present invention includes: a first plate 1 and a second plate 2, the first plate 1 and the second plate 2 are connected and cooperate to define a channel 3, and the first plate 1 and the second plate 2 are both flexible stainless steel parts.
[0028] Understandably, flexible stainless steel not only maintains the structural strength of conventional stainless steel, but also has high ductility that conventional stainless steel does not have. This allows the refrigerant transport module 100 to adapt well even when space is limited or when it needs to be connected to external components at a specific angle. As a result, the installation difficulty of the refrigerant transport module 100 and external parts can be reduced, thereby reducing the assembly time and cost of HVAC systems.
[0029] It should be noted that flexible stainless steel parts can be composed of the following components and their mass percentages: C: 0% (no additives) to 0.02%, Si: 0% (no additives) to 1%, Mn: 1% to 2%, Cr: 16% to 18%, Ni: 9% to 11%, Cu: 2% to 4%, Mo: 0% (no additives) to 0.03%, P: 0% (no additives) to 0.03%, and S: 0% (no additives) to 0.03%, with the remainder consisting of Fe and unavoidable impurities. The addition of Cu reduces the yield strength of flexible stainless steel parts to 140 MPa to 180 MPa, the tensile strength to 400 MPa to 600 MPa, increases the elongation to 50% to 80%, the yield strength ratio to less than 0.4, and the hardness to 100 Hv to 120 Hv. The addition of Cr and Ni elements gives the flexible stainless steel parts a lower pitting corrosion potential, lower pitting corrosion weight loss, and lower martensitic transformation temperature. This makes it more difficult for the flexible stainless steel parts to undergo martensitic phase transformation during processing, thereby achieving stronger resistance to pitting corrosion and stress corrosion.
[0030] It should be further explained that the flexible stainless steel material involved in this utility model has a lower C element content, which makes it more difficult for it to pass through the material sensitization range during hot working and welding, effectively controlling the formation of M23C6, thereby achieving stronger resistance to intergranular corrosion and effectively reducing welding defects.
[0031] According to the embodiment of the present utility model, the refrigerant transport module 100 is designed so that the first plate 1 and the second plate 2 are both made of flexible stainless steel, which makes the first plate 1 and the second plate 2 have lower yield strength and higher ductility, reducing the production difficulty of the first plate 1 and the second plate 2. It allows for smaller stamping chamfers during the stamping and punching process, which is beneficial to the connection of the first plate 1 and the second plate 2 and improves the quality of the refrigerant transport module 100.
[0032] In some embodiments of this utility model, a first recess 31 is formed on the first plate 1, and a second recess 32 is formed opposite to it on the second plate 2. The first recess 31 and the second recess 32 cooperate to define a channel 3. That is, when the first plate 1 and the second plate 2 are connected, the first recess 31 and the second recess 32, which are positioned opposite each other, cooperate to define a space, namely the channel 3. The channel 3 is used for refrigerant flow, which improves the sealing performance of the refrigerant transport module 100, reduces the risk of refrigerant leakage, and enhances the structural stability of the refrigerant transport module 100.
[0033] In some embodiments of this utility model, the first recess 31 is formed by stamping with a stamping chamfer R1 not greater than 1.8mm; the second recess 32 is formed by stamping with a stamping chamfer R2 not greater than 1.8mm. It should be noted that stamping is a metal forming process that applies external force to a metal sheet using a mold, causing plastic deformation to obtain a part of the desired shape and size. The stamping chamfer ensures a smooth transition between the first recess 31 and the first plate 1, and between the second recess 32 and the second plate 2, which is beneficial for welding the first plate 1 and the second plate 2, improving the safety of the refrigerant transport module 100, reducing the risk of injury caused by sharp changes, and enhancing assembly performance. In other words, a smaller stamping chamfer is allowed during the stamping process, which is beneficial for welding the first plate 1 and the second plate 2, reducing solder usage and improving weld reliability.
[0034] For example, the stamping chamfer R1 can be 1.8mm, 1.75mm, 1.7mm, 1.65mm, 1.6mm, 1.55mm, 1.5mm, 1.45mm, 1.4mm, 1.35mm, 1.3mm, 1.25mm, 1.2mm, 1.15mm, 1.1mm, 1.05mm, 1.0mm, etc.; the stamping chamfer R2 can be 1.8mm, 1.75mm, 1.7mm, 1.65mm, 1.6mm, 1.55mm, 1.5mm, 1.45mm, 1.4mm, 1.35mm, 1.3mm, 1.25mm, 1.2mm, 1.15mm, 1.1mm, 1.05mm, 1.0mm, etc.
[0035] In some embodiments of this utility model, a through hole 5 is formed in one of the first recess 31 and the second recess 32, and a flange 51 is formed around the periphery of the through hole 5. That is, the through hole 5 can be formed in either the first recess 31 or the second recess 32. Specifically, the flange 51 is a common processing method in stamping, which refers to folding the edge of the hole outward or inward to form an edge. This flange 51 treatment can increase the strength and tensile strength of the hole edge, prevent the hole edge from cracking due to stress concentration, and also play a certain sealing role to prevent liquid or gas from leaking from the edge of the hole. In addition, the flange 51 can also improve the engagement during assembly, making the assembly more secure.
[0036] In some embodiments of this utility model, the height of the flange 51 is not less than 1.2 mm, and / or the wall thickness of the flange 51 is not less than 1.2 mm. That is to say, the vertical distance from the upper surface of the periphery of the through hole 5 to the top of the flange 51 is at least 1.2 mm, ensuring that the flange 51 reaches a certain height to enhance its protective effect on the edge of the hole, improve the stability and durability of the overall structure, especially under external force or torsion; the thickness of the flange 51 itself is greater than or equal to 1.2 mm, ensuring that the flange 51 part has sufficient strength and is not easy to deform or break under force, while also having a sealing function.
[0037] For example, the height of the flange 51 can be 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, etc.; the wall thickness of the flange 51 can be 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, etc.
[0038] Furthermore, since the first plate 1 and the second plate 2 are flexible stainless steel integral molding parts, the first recess 31 can be manufactured on the first plate 1, the second recess 32 can be manufactured on the second plate 2, and a through hole 5 can be formed on one of the first recess 31 and the second recess 32. Moreover, even in complex manufacturing, it can still maintain good mechanical strength and compressive strength. In addition, while ensuring the structural strength of the refrigerant transport module 100, the weight of the refrigerant transport module 100 is reduced.
[0039] In some embodiments of this utility model, a connecting pipe 4 is connected to the through hole 5, and one end of the connecting pipe 4 is connected to the flange 51, which enhances the sealing of the connection between the connecting pipe 4 and the through hole 5, avoids refrigerant leakage, and ensures that the connecting pipe 4 remains stable during use.
[0040] In some embodiments of this utility model, the adapter pipe 4 is a flexible stainless steel pipe, a copper pipe, or a copper alloy pipe. It is understood that the adapter pipe 4 can be a copper pipe, a copper alloy pipe, or a flexible stainless steel pipe.
[0041] Copper pipes and copper alloy pipes have better thermal conductivity. Therefore, using copper pipes or copper alloy pipes for the transfer pipe 4 is beneficial for the refrigerant transfer in the refrigerant transport module 100.
[0042] Flexible stainless steel pipes have superior strength and higher toughness. Therefore, the use of flexible stainless steel pipes for the adapter pipe 4 allows it to have a higher bending limit. Furthermore, the connection structure between the adapter pipe 4 and the through hole 5 is simple, making the adapter pipe 4 easy to process and form. It also gives the adapter pipe 4 excellent material mechanical properties. The adapter pipe 4 has good structural strength and toughness, and can withstand the high-frequency vibration caused by fluid impact in the HVAC system. It also makes the adapter pipe 4 more corrosion resistant and less prone to scale buildup. In addition, flexible stainless steel is less expensive than copper, which can reduce the production cost of the refrigerant transport module 100.
[0043] It should be noted that, in this embodiment, the yield strength of the flexible stainless steel is 140–180 MPa; and / or, the tensile strength of the flexible stainless steel is reduced to 400–600 MPa; and / or, the elongation of the flexible stainless steel is 50–80%; and / or, the yield strength ratio of the flexible stainless steel is less than 0.4; and / or, the hardness of the flexible stainless steel material is 100–120 Hv. In other words, the yield strength of the flexible stainless steel is between 140 MPa and 180 MPa, the tensile strength of the flexible stainless steel is between 400 MPa and 600 MPa, the elongation of the flexible stainless steel is between 50% and 80%, the yield strength ratio of the flexible stainless steel is less than 0.4, and the hardness of the flexible stainless steel material is between 100 Hv and 120 Hv.
[0044] Furthermore, the flexible stainless steel material is composed of the following components and their mass percentages: C: less than 0.02%, Si: 0.5%–1%, Mn: 1–2%, Cr: 16–18%, Ni: 9–11%, Cu: 2–4%, Mo: 0–0.02%, P: less than 0.03%, S: less than 0.03%, with the remainder consisting of Fe and unavoidable impurities. The addition of Cu reduces the yield strength of the flexible stainless steel material to 140–180 MPa, the tensile strength to 400–600 MPa, increases the elongation to 50%–80%, the yield strength ratio to less than 0.4, and the hardness to 100 Hv–120 Hv. The addition of Cr and Ni elements gives the flexible stainless steel material a lower pitting corrosion potential, lower pitting corrosion weight loss, and a lower martensitic transformation temperature, making it more difficult for the flexible stainless steel material to undergo martensitic phase transformation during processing, thereby achieving stronger resistance to pitting corrosion and stress corrosion.
[0045] It should be further explained that the flexible stainless steel material involved in this utility model has a lower C element content, which makes it more difficult for it to pass through the material sensitization range during hot working and welding, effectively controlling the formation of M23C6, thereby achieving stronger resistance to intergranular corrosion and effectively reducing welding defects.
[0046] According to some embodiments of this utility model, the Md30 of the flexible stainless steel is -50℃ to -80℃. In the field of stainless steel materials, "Md30" refers to the critical temperature for martensitic transformation. Specifically, "Md30" is the temperature at which 50% martensite is generated when the deformation is 30%. This parameter is very important for predicting the behavior of stainless steel during processing because the formation of martensite affects the hardness and magnetism of the material. Generally speaking, the lower the "Md30" value, the more difficult it is for the material to form martensite under the same deformation conditions. Therefore, the material has stronger resistance to aging cracking, i.e., it is less prone to cracking. Conversely, if the "Md30" value is high, the material is more likely to generate martensite during processing, which may lead to cracking. Therefore, by ensuring that the critical temperature for the martensitic transformation of the flexible stainless steel meets the above conditions, the refrigerant transport module 100 can operate well in low-temperature environments with good stability.
[0047] According to some embodiments of this utility model, the flexible stainless steel is austenitic stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm. Therefore, austenitic stainless steel with a grain size of 20μm to 40μm not only maintains the inherent good corrosion resistance and processability of austenitic stainless steel, but also achieves superior mechanical properties and a potentially longer service life due to grain refinement.
[0048] In some embodiments of this utility model, the adapter pipe 4 is welded to the flange 51, and the first plate 1 is welded to the second plate 2. The welded connection offers high strength and good sealing. Therefore, the welded connections of the adapter pipe 4 and flange 51, and the first plate 1 and second plate 2, improve the connection stability and sealing of the adapter pipe 4 and flange 51, as well as the connection stability and sealing of the first plate 1 and second plate 2, thereby ensuring the overall sealing of the refrigerant transport module 100.
[0049] Specifically, the adapter pipe 4 and the flange 51 are welded together using a first solder or a second solder, and / or the first plate 1 and the second plate 2 are welded together using a first solder, wherein...
[0050] The first solder, by weight (wt%), contains Cu: 46%–50%, Ni: 9%–11%, Si: 0.04%–0.25%, with the remainder consisting of Zn and unavoidable impurities. The flux used with the first solder, by weight (wt%), contains boric acid 60%–80%, fluoride 5%–15%, and potassium borate 10%–20%. The melting temperature t1 when using the first solder satisfies: 910℃ ≤ t1 ≤ 935℃. The brazing temperature t2 when using the first solder satisfies: 950℃ ≤ t2 ≤ 975℃.
[0051] The second solder, by weight, contains 57%-61% Cu, 1.0%-1.5% Sn, and 0.05%-0.2% Si, with the remainder consisting of Zn and unavoidable impurities. The flux used when the second solder is employed contains 60%-80% boric acid, 5%-15% fluoride, and 10%-20% potassium borate, by weight. The melting temperature t1 when the second solder is employed satisfies the following conditions: 880℃≤t1≤890℃. The brazing temperature t2 when the second solder is employed satisfies the following conditions: 920℃≤t2≤930℃.
[0052] It is understandable that when the material of the adapter pipe 4 is different, the solder required for welding the adapter pipe 4 and the flange 51 will also be different.
[0053] For example, when the adapter pipe 4 is a copper pipe or copper alloy pipe and the flange 51 is a flexible stainless steel part, the solder required for welding the adapter pipe 4 and the flange 51 is a second solder. The composition and mass percentage of the second solder are: Cu: 57%-61%, Sn: 1.0%~1.5%, Si: 0.05%~0.2%, with the remainder being Zn; the melting temperature range is 880℃~890℃, and the recommended brazing temperature is 920℃~930℃. The composition and percentage of the flux are: boric acid: 60%-80%, fluoride: 5%-15%, potassium borate: 10%-20%. Specifically, for brazing, flame welding or high-frequency welding technology can be selected, which results in a wider welding activity range, less post-weld residue, stronger corrosion resistance and better reliability at the weld, and a significant reduction in welding costs; the welding temperature requirement is low, making it less likely to burn the base material; the solder has good fluidity and filling properties, allowing for more relaxed requirements on pipe diameter and fitting clearance, high stability and strong reliability; and it does not require an ammonia decomposition furnace, thus requiring lower processing precision.
[0054] Flexible stainless steel is a type of stainless steel material with high ductility and flexibility. It can adapt to complex shape changes and bending requirements without losing its corrosion resistance and mechanical strength. Even after a complex forming process, it can still maintain good mechanical strength and compressive strength. Flexible stainless steel is easy to process by bending, welding and connecting.
[0055] For example, when the adapter pipe 4 is a flexible stainless steel pipe and the flange 51 is a flexible stainless steel material, the solder required for welding the adapter pipe 4 and the flange 51 is the first solder. The composition and mass percentage of the first solder are: Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, with the remainder being Zn; the melting temperature range is 910℃-935℃, and the recommended brazing temperature is 950℃-975℃. The composition and mass percentage of the flux are: boric acid: 60%-80%, fluoride: 5%-15%, potassium borate: 10%-20%. Specifically, for brazing, flame welding or high-frequency welding technology can be selected, which has a wider active range and less residue after welding compared to the traditional steel-to-steel brazing process. For fusion welding, argon arc welding technology can be selected, which has more relaxed requirements on the weld position and welding area size compared to the traditional steel-to-steel fusion welding process.
[0056] For example, both plate 1 and plate 2 are made of flexible stainless steel. The solder required for welding plate 1 and plate 2 is called the first solder. The composition and mass percentage of the first solder are: Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, with the remainder being Zn; the melting temperature range is 910℃-935℃, and the recommended brazing temperature is 950℃-975℃. The composition and mass percentage of the flux are: boric acid: 60%-80%, fluoride: 5%-15%, potassium borate: 10%-20%. Specifically, for brazing, flame welding or high-frequency welding technology can be selected, which has a wider active range and less residue after welding compared to the traditional steel-to-steel brazing process. For fusion welding, argon arc welding technology can be selected, which has more lenient requirements on weld position and welding area size compared to the traditional steel-to-steel fusion welding process.
[0057] Furthermore, in some other embodiments, fusion welding can also be used.
[0058] The HVAC device according to a second aspect of the present invention includes a refrigerant transport module 100 according to the first aspect of the present invention described above.
[0059] The HVAC device according to the present invention improves the overall performance of the HVAC device and reduces the production cost of the HVAC device by setting the refrigerant transport module 100 of the first aspect embodiment.
[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.
[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0064] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A refrigerant transport module, characterized in that, include: The first plate and the second plate are connected and cooperate to define a channel. Both the first plate and the second plate are made of flexible stainless steel.
2. The refrigerant transport module according to claim 1, characterized in that, A first recess is formed on the first plate, and a second recess is formed opposite to it on the second plate. The first recess and the second recess cooperate to define the channel.
3. The refrigerant transport module according to claim 2, characterized in that, The first recess is formed by stamping and the stamping chamfer R1 is not greater than 1.8mm; the second recess is formed by stamping and the stamping chamfer R2 is not greater than 1.8mm.
4. The refrigerant transport module according to claim 3, characterized in that, One of the first recess and the second recess has a through hole, and the periphery of the through hole has a flange.
5. The refrigerant transport module according to claim 4, characterized in that, The height of the flange is not less than 1.2 mm, and / or the wall thickness of the flange is not less than 1.2 mm.
6. The refrigerant transport module according to claim 5, characterized in that, An adapter pipe is connected to the through hole, and one end of the adapter pipe is connected to the flange.
7. The refrigerant transport module according to claim 6, characterized in that, The transfer pipe is a flexible stainless steel pipe, copper pipe, or copper alloy pipe.
8. The refrigerant transport module according to any one of claims 1-7, characterized in that, The yield strength of the flexible stainless steel is 140-180 MPa; and / or, the tensile strength of the flexible stainless steel is reduced to 400-600 MPa; and / or, the elongation of the flexible stainless steel is 50-80%; and / or, the yield strength ratio of the flexible stainless steel is less than 0.4; and / or, the hardness of the flexible stainless steel material is 100-120 Hv.
9. The refrigerant transport module according to any one of claims 1-7, characterized in that, The Md30 of the flexible stainless steel is -50℃ to -80℃.
10. The refrigerant transport module according to any one of claims 1-7, characterized in that, The flexible stainless steel is austenitic stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm.
11. The refrigerant transport module according to claim 7, characterized in that, The adapter pipe is welded to the flange, and / or the first plate is welded to the second plate.
12. The refrigerant transport module according to claim 11, characterized in that, The adapter pipe and the flange are welded together by a first solder or a second solder, and / or the first plate and the second plate are welded together by a first solder.
13. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, Includes the refrigerant transport module as described in any one of claims 1-12.