Distributor assembly and heating and ventilation device having the same

Abstract

This utility model discloses a distributor assembly and a heating and ventilation system having the same. The distributor assembly includes: a distributor; and multiple branch pipes, all of which are connected to the distributor. At least one of the distributor and the branch pipes is made of flexible stainless steel. According to the distributor assembly of this utility model, by making one of the distributor and the branch pipes a flexible stainless steel component, the installation difficulty between the distributor and the branch pipes can be reduced, thereby reducing the assembly time of the heating and ventilation system and lowering production costs. Simultaneously, it also reduces the risk of vibration-induced cracking at the connection between the distributor and the branch pipes, thus improving the reliability of the heating and ventilation system.

Description

Technical Field

[0001] This utility model relates to the field of HVAC (Heating, Ventilation, and Air Conditioning) technology, and in particular to a distributor assembly and an HVAC device having the same. Background Technology

[0002] In the structural design of air conditioning units, a distributor is typically installed on the compressor piping to collect refrigerant from multiple branch pipes. However, as the refrigerant flows through the piping, it impacts the piping, and the compressor vibrates during HVAC operation. This reduces the reliability of the connection between the distributor and the piping, thus affecting the overall reliability of the HVAC system. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a distributor assembly that can reduce the assembly time and cost of HVAC systems and improve the reliability of HVAC systems.

[0004] This utility model also proposes a heating and ventilation device having the above-mentioned distributor assembly.

[0005] According to a first aspect of the present invention, a distributor assembly includes: a distributor; a plurality of branch pipes, all of which are connected to the distributor; wherein at least one of the distributor and the branch pipes is made of flexible stainless steel.

[0006] According to the distributor assembly of this utility model, by setting one of the distributor and the branch pipe as a flexible stainless steel component, the installation difficulty between the distributor and the branch pipe can be reduced, thereby reducing the assembly time of the HVAC system and lowering production costs; at the same time, it can also reduce the risk of vibration cracking at the connection between the distributor and the branch pipe, thereby improving the reliability of the HVAC system.

[0007] According to some embodiments of the present invention, the distributor is provided with a plurality of first interfaces, and the number of branch pipes is a plurality of, wherein the plurality of branch pipes correspond one-to-one with the plurality of first interfaces and are plugged in and connected.

[0008] According to some optional embodiments of the present invention, the distributor is provided with a flow channel and a second interface, one end of the flow channel is connected to a plurality of first interfaces and the other end is connected to the second interface.

[0009] According to some optional embodiments of the present invention, the dispenser includes: a main body portion, in which the flow channel is formed, and a plurality of first interfaces are formed at one end of the main body portion; and a connecting pipe portion, which is connected to the side of the main body portion opposite to the first interfaces, and the inner side of the connecting pipe portion defines the second interface.

[0010] According to some optional embodiments of the present invention, the main body is tapered, and the cross-sectional dimension of the outer contour of the main body gradually decreases in the direction from the main body to the connector. The first interface is located on the side of the main body away from the connector. A plurality of the first interfaces are arranged at intervals along the circumference of the main body. The flow channel is formed into a ring along the circumference of the main body. In the direction from the main body to the connector, the flow channel extends obliquely toward the central axis of the main body.

[0011] According to some embodiments of the present invention, 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.

[0012] According to some embodiments of this utility model, the Md30 of the flexible stainless steel is -50℃ to -80℃.

[0013] According to some embodiments of the present invention, the flexible stainless steel is austenitic flexible stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm.

[0014] According to some embodiments of this utility model, the wall thickness of the flexible stainless steel pipe is 1.2mm to 1.5mm.

[0015] According to some embodiments of the present invention, the distributor assembly further includes a connecting pipe, one end of which is connected to the connecting pipe portion, and the connecting pipe is a copper pipe, a copper alloy pipe, or a flexible stainless steel pipe.

[0016] According to some optional embodiments of the present invention, the distributor assembly further includes: an adapter pipe connected between the connector portion and the connecting pipe, wherein the connecting pipe is a copper pipe or a copper alloy pipe, and the adapter pipe is a copper sleeve.

[0017] According to some embodiments of the present invention, the connecting pipe is inserted into the connecting tube, wherein the insertion depth of the connecting pipe is 5mm-20mm, and / or the fitting gap between the connecting pipe and the connecting tube is 0.1mm-0.2mm.

[0018] According to some embodiments of the present invention, the connecting pipe is welded to the connecting pipe portion.

[0019] According to some embodiments of the present invention, the main body is provided with a weight-reducing groove recessed towards the connecting pipe on the side facing the branch pipe.

[0020] The HVAC device according to the second aspect of the present invention includes a distributor assembly according to the first aspect of the present invention.

[0021] The HVAC system according to this utility model improves the overall performance of the HVAC system by providing the distributor assembly described in the first aspect.

[0022] 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

[0023] Figure 1 This is a schematic diagram of a dispenser assembly according to an embodiment of the present utility model;

[0024] Figure 2 It is along Figure 1 The cross-sectional view of line AA shown;

[0025] Figure 3 yes Figure 1 A schematic diagram of the welding of the distributor and branch pipe shown;

[0026] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 yes Figure 1 A schematic diagram of the welding of the distributor and connecting pipe shown;

[0028] Figure 6 yes Figure 5 A magnified view of a section at point C.

[0029] Figure label:

[0030] 100. Distributor component;

[0031] 10. Distributor; 11. Main body; 111. First interface; 112. Second interface; 113. Flow channel; 114. Weight reduction groove; 12. Connecting pipe;

[0032] 20. Branch pipe;

[0033] 30. Connecting pipe;

[0034] 40. Transfer of control; 41. First transfer of control; 42. Second transfer of control. Detailed Implementation

[0035] 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.

[0036] The following is for reference. Figures 1-6 Describes a dispenser assembly 100 according to a first aspect embodiment of the present invention.

[0037] like Figure 1 As shown, the distributor assembly 100 according to an embodiment of the present invention includes: a distributor 10 and a plurality of branch pipes 20. All of the plurality of branch pipes 20 are connected to the distributor 10; wherein, at least one of the distributor 10 and the branch pipes 20 is made of flexible stainless steel, that is, one of the distributor 10 and the branch pipes 20 may be made of flexible stainless steel, or both the distributor 10 and the branch pipes 20 may be made of flexible stainless steel.

[0038] Preferably, the flexible stainless steel is a flexible stainless steel material with a copper content of 2-4%. It can be understood that the flexible stainless steel material not only maintains the structural strength of conventional flexible stainless steel materials, but also has high ductility that conventional flexible stainless steel materials do not have. This allows the distributor 10 to fit well even when space is limited or when a specific angle is required to connect with the branch pipe 20. This reduces the installation difficulty between the distributor 10 and the branch pipe 20, thereby reducing the assembly time and cost of the HVAC system. At the same time, the cost of flexible stainless steel parts is lower than that of copper materials, thereby reducing the production cost of the distributor assembly 100.

[0039] It should be noted that in HVAC systems, the distributor 10 can be installed on the compressor return pipe or at the return port to collect the refrigerant returning to the distributor, thereby reducing the use of return piping and lowering costs. When the refrigerant flows in the return pipe, it impacts the pipe, and the compressor vibrates during HVAC operation. Flexible stainless steel can absorb and disperse external forces; therefore, in this application, the connecting part 12 is made of flexible stainless steel, which also reduces the risk of vibration-induced cracking at the connection between the distributor 10 and the branch pipe 20, thereby improving the reliability of the HVAC system.

[0040] It should be noted that flexible stainless steel materials can be composed of the following components and their mass percentages: C: 0%–0.02%, Si: 0%–1%, Mn: 1%–2%, Cr: 16%–18%, Ni: 9%–11%, Cu: 2%–4%, Mo: 0%–0.03%, P: 0%–0.03%, and S: 0%–0.03%. The addition of Cu reduces the yield strength of the flexible stainless steel to 140 MPa–180 MPa, the tensile strength to 400 MPa–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 gives the flexible stainless steel a lower pitting corrosion potential, lower pitting corrosion weight loss, and lower martensitic transformation temperature, making it more difficult for the flexible stainless steel tube to undergo martensitic phase transformation during processing, thus achieving stronger resistance to pitting corrosion and stress corrosion.

[0041] It should be further explained that the flexible stainless steel material involved in this application 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.

[0042] According to the present invention, the distributor assembly 100, by setting one of the distributor 10 and the branch pipe 20 as a flexible stainless steel component, can reduce the installation difficulty between the distributor 10 and the branch pipe 20, thereby reducing the assembly time of the HVAC system and reducing production costs; at the same time, it can also reduce the risk of cracking at the connection between the distributor 10 and the branch pipe 20 due to vibration, thereby improving the reliability of the HVAC system.

[0043] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the distributor 10 has multiple first interfaces 111, meaning it has two, three, four, or more first interfaces 111. The number of branch pipes 20 is also multiple, meaning it has two, three, four, or more branch pipes 20. Each branch pipe 20 corresponds one-to-one with and is plugged into one of the multiple first interfaces 111. The branch pipes 20 connect to multiple refrigerant channels 113. The distributor 10 collects the refrigerant from the multiple branch pipes 20 and connects to an external piping system, ensuring that the refrigerant flowing into the distributor 10 can smoothly integrate into the overall circulation process. Furthermore, the plug-in connection method is simple and convenient to operate, thereby improving assembly efficiency.

[0044] For example, such as Figure 1 and Figure 2As shown, the distributor 10 has multiple first interfaces 111 on its upper side, and the branch pipe 20 is arranged vertically. The lower end of the branch pipe 20 is plugged into the first interface 111, and the upper end of the branch pipe 20 extends upward. Preferably, the branch pipe 20 is welded to the first interface 111 of the distributor 10, which can ensure the connection strength between the branch pipe 20 and the distributor 10.

[0045] Furthermore, branch pipes 20 are used to evenly or as needed distribute fluid from the main pipeline to multiple branches. This ensures that each part requiring fluid receives sufficient supply. Simultaneously, by controlling the flow rate of fluid entering each branch pipe 20, pressure regulation of each part can be achieved, ensuring pressure balance throughout the system and preventing damage to certain parts due to excessively high or low pressure. Moreover, using branch pipes 20 simplifies the installation and maintenance of large systems. For example, in a building's air conditioning system, the distributor 10 can centrally control the heating or cooling of multiple rooms, making adjustments and maintenance more convenient.

[0046] According to some optional embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the distributor 10 has a flow channel 113 and a second interface 112. One end of the flow channel 113 (e.g., Figure 2 The upper end of the flow channel 113 shown is connected to a plurality of first interfaces 111 and the other end (as shown) Figure 2 The lower end of the flow channel 113 shown is connected to the second interface 112. Thus, the flow channel 113 connects the first interface 111 and the second interface 112. Therefore, the refrigerant flowing from the branch pipe 20 into the first interface 111 flows through the flow channel 113 to the second interface 112, thereby circulating the refrigerant throughout the cooling system.

[0047] According to some optional embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the dispenser 10 includes a main body 11 and a connecting pipe 12. A flow channel 113 is formed within the main body, and a plurality of first interfaces 111 are formed at one end of the main body 11 (e.g., ...). Figure 2 The upper end of the main body 11 shown); the connecting pipe 12 is connected to the side of the main body 11 away from the first interface 111 (as shown). Figure 2 The second interface 112 is defined on the inner side of the main body 11 (shown below) and the connecting pipe 12.

[0048] In this way, the main body 11 is provided with a first interface 111 to facilitate the connection between the branch pipe 20 and the distributor 10. The connecting pipe 12 is provided on one side of the main body 11, so that the refrigerant flowing from the branch pipe 20 into the distributor 10 can flow out of the distributor 10 through the connecting pipe 12, thereby enabling the distributor 10 to gather the refrigerant of multiple branch pipes 20 into one pipe.

[0049] For example, such as Figure 1 and Figure 2 As shown, the main body 11 is located on the upper side of the connector 12. The upper end of the main body 11 forms a first interface 111, and a flow channel 113 is formed inside the main body 11. The connector 12 is a circular tube, and the lower end of the connector 12 defines a second interface 112.

[0050] According to some optional embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the main body 11 is tapered, and the cross-sectional dimensions of the outer contour of the main body 11 gradually decrease in the direction from the main body 11 to the connecting pipe 12. The first interface 111 is located on the side of the main body 11 opposite to the connecting pipe 12 (e.g., Figure 2 (On the upper side of the main body 11 shown), a plurality of first interfaces 111 are arranged at intervals along the circumference of the main body 11, and the flow channel 113 is formed in a ring along the circumference of the main body. In the direction from the main body 11 to the connector 12, the flow channel 113 extends obliquely toward the central axis of the main body 11.

[0051] In this way, the conical main body 11 has a reasonable structural design. At the end of the main body 11 where the first interface 111 is set, the cross-sectional size of the main body 11 is the largest, so that there is enough area to set the first interface 111. This ensures the number of branch pipes 20 connected to the main body 11. Furthermore, the first section of the main body 11 away from the first interface 111 has the smallest cross-sectional size, so that the refrigerant in the flow channel 113 can be drawn into the connecting pipe 12, thereby realizing that the refrigerant in multiple branch pipes 20 flows into the same pipeline.

[0052] For example, such as Figure 1 and Figure 2 As shown, the main body 11 is a cone with a gradually decreasing outer contour cross-sectional size from top to bottom. The first interface 111 is located on the upper side of the main body 11. The flow channel 113 extends obliquely from top to bottom toward the central axis of the main body 11, and the flow channel 113 is formed into a ring inside the main body 11, so that the flow channel 113 can connect multiple first interfaces 111.

[0053] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the dispenser assembly 100 also includes: a connecting pipe 30, one end of the connecting pipe 30 (e.g., Figure 2 The upper end of the connecting pipe 30 shown is connected to the connecting pipe section 12. The connecting pipe 30 and the connecting pipe section 12 are used to deliver the refrigerant in the distributor 10 to a designated location.

[0054] According to some embodiments of this utility model, the connecting pipe 30 is a copper pipe, a copper alloy pipe, or a flexible stainless steel pipe. It is understood that the connecting pipe 30 can be a copper pipe, a copper alloy pipe, or a flexible stainless steel pipe.

[0055] Copper pipes and copper alloy pipes have better heat conduction performance. Therefore, using copper pipes or copper alloy pipes for connecting pipe 30 is beneficial for the refrigerant transmission in the air conditioning system.

[0056] Flexible stainless steel pipes have better strength and higher toughness. Therefore, the use of flexible stainless steel pipes for connecting pipe 30 can give the connecting pipe 30 a higher bending limit. As a result, when the layout space changes during the design of HVAC system, it is easier to arrange the distributor assembly 100 in the layout space, thereby reducing the design difficulty of HVAC system.

[0057] When the connecting pipe 30 is made of flexible stainless steel, which is a flexible stainless steel material with high ductility and flexibility, it can adapt to complex shape changes and bending requirements without sacrificing 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. Therefore, it is convenient to weld the connecting pipe 30 to the connecting pipe part 12.

[0058] According to some embodiments of this utility model, the Md30 of the flexible stainless steel is -50℃ to -80℃. In the field of flexible 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 flexible 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 martensitic transformation of the flexible stainless steel meets the above conditions, the distributor assembly 100 can operate well in low-temperature environments with good stability.

[0059] According to some embodiments of this utility model, the flexible stainless steel is austenitic flexible stainless steel with an average grain size of 20μm to 40μm. Therefore, austenitic flexible stainless steel with a grain size of 20μm to 40μm not only maintains the inherent good corrosion resistance and processability of austenitic flexible stainless steel, but also achieves superior mechanical properties and a potentially longer service life due to grain refinement.

[0060] According to some embodiments of this utility model, the wall thickness of the flexible stainless steel tube is 1.2mm to 1.5mm. This ensures that the wall thickness is not too small, which helps to guarantee the mechanical strength and compressive strength of the flexible stainless steel tube. At the same time, it also ensures the ductility of the flexible stainless steel tube, enabling it to adapt to complex shape changes and bending requirements. Furthermore, it prevents the wall thickness of the flexible stainless steel tube from being too large, thereby reducing the cost of the flexible stainless steel tube and thus reducing the production cost of the entire distributor assembly 100.

[0061] According to some embodiments of the present invention, the distributor assembly 100 further includes an adapter pipe 40, which is connected between the connector section 12 and the connecting pipe 30. On one hand, the adapter pipe 40 can be used to match the diameter difference between the connector section 12 and the connecting pipe 30. If the connector section 12 of the distributor 10 is not directly compatible with the existing connecting pipe 30 (e.g., different diameters), the adapter pipe 40 can act as a transitional connection, thereby enabling smooth connection of pipes of different sizes. On the other hand, when the materials of the distributor 10 and the connecting pipe 30 are inconsistent, the adapter pipe 40 can be made of a material with good compatibility with these materials, thus ensuring the reliability of the connection between the distributor 10 and the connecting pipe 30. According to some embodiments of the present invention, the connecting pipe 30 is a copper pipe or a copper alloy pipe, and the adapter pipe 40 is a copper sleeve.

[0062] It should be noted that, typically, the connecting pipe 30 is welded to the connecting pipe 30 via an adapter pipe 40. When the connecting pipe part 12 is a flexible stainless steel component and the connecting pipe 30 is a copper pipe or copper alloy pipe, the adapter pipe 40 connecting the connecting pipe part 12 and the connecting pipe 30 is a copper sleeve. This copper sleeve can be welded to both the flexible stainless steel component and the connecting pipe 30. Therefore, using a copper sleeve for the adapter pipe 40 allows for welding between the distributor 10 and the connecting pipe 30 and ensures the stability of the welding.

[0063] When the diameters or shapes of two connected components do not match, the adapter pipe 40 can act as an intermediary to facilitate the transition between interfaces of different sizes or types. This allows various sizes of connecting pipes 30 to be easily connected to the connecting pipe section 12, thereby improving the versatility of the distributor 10. Simultaneously, using the adapter pipe 40 allows for easy replacement or addition of components without modifying the existing system, improving the maintainability and flexibility of the system and facilitating the maintenance and replacement of the entire distributor assembly 100.

[0064] 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.

[0065] Furthermore, such as Figure 5 and Figure 6 As shown, the adapter pipe 40 includes: a first adapter pipe 41 and a second adapter pipe 42, which are welded together. The first adapter pipe 41 is welded to the main body 11, and the second adapter pipe 42 is welded to the connecting pipe 30.

[0066] 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.

[0067] It should be further explained that the flexible stainless steel material involved in this application has a lower C 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.

[0068] According to some embodiments of this utility model, such as Figure 2As shown, the connecting pipe 30 is inserted into the connecting pipe 12, and the insertion depth H of the connecting pipe 30 is 5mm-20mm. This ensures that the insertion depth of the connecting pipe 30 and the connecting pipe 12 is not too small, which helps to increase the contact area between the connecting pipe 30 and the connecting pipe 12, thereby increasing the sealing effect between the connecting pipe 30 and the adapter pipe 40. At the same time, it also ensures that the insertion depth of the connecting pipe 30 and the connecting pipe 12 is not too large, thereby reducing material usage and unnecessary stress concentration, and thus increasing the service life of the distributor assembly 100.

[0069] For example, the insertion depth of the connecting tube 30 can be 5mm, 10mm, 15mm, or 20mm. Preferably, the connecting tube 30 can be a flexible stainless steel tube. Flexible stainless steel is a flexible 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 bend, weld, and connect.

[0070] According to some embodiments of this utility model, as shown in the figure, the connecting pipe 30 and the connecting tube 12 are inserted into each other, and the fitting gap L between the connecting pipe 30 and the connecting tube 12 is 0.1mm-0.2mm. This ensures that the fitting gap between the connecting pipe 30 and the connecting tube 12 is not too small, thereby guaranteeing a smooth and efficient assembly process; at the same time, it also ensures that the fitting gap between the connecting pipe 30 and the connecting tube 12 is not too large, which helps to reduce the material required for sealing between the connecting pipe 30 and the connecting tube 12.

[0071] For example, the fitting clearance between the connecting pipe 30 and the connecting pipe 12 can be 0.1mm, 0.15mm or 0.2mm.

[0072] According to some embodiments of this utility model, the connecting pipe 30 and the connecting pipe portion 12 are welded together. The welded connection has high strength and good sealing performance. Therefore, by using a welded connection between the connecting pipe 30 and the connecting pipe portion 12, the connection stability and sealing performance of the connecting pipe 30 and the connecting pipe portion 12 can be improved, thereby ensuring the overall sealing performance of the distributor assembly 100.

[0073] Optionally, the solder required for welding the distributor 10 to the connecting pipe 30 varies depending on the material of the connecting pipe 30. For example, when the connecting pipe 30 is a copper pipe or a copper alloy pipe, the composition and mass percentage of the solder required for welding the distributor 10 to the connecting pipe 30 are as follows: Cu: 57%-61%, Sn: 1.0%-1.5%, Si: 0.05%-0.2%, with the remainder being Zn; melting temperature range 880℃-890℃, recommended brazing temperature 920℃-930℃. The composition and percentage of the flux are as follows: boric acid: 60%-80%, fluoride: 5%-15%, potassium borate: 10%-20%.

[0074] For example, when the connecting pipe 30 is a flexible stainless steel pipe, the composition and mass percentage of the solder required for welding the distributor 10 to the connecting pipe 30 are as follows: Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, with the remainder consisting of Zn and unavoidable impurities; melting temperature range 910℃-935℃, recommended brazing temperature 950℃-975℃. The composition and mass percentage of the flux are as follows: boric acid: 60%-80%, fluoride: 5%-15%, potassium borate: 10%-20%.

[0075] For example, both the distributor 10 and the branch pipe 20 are made of flexible stainless steel. The solder required for welding the distributor 10 and the branch pipe 20 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 lenient requirements on the weld position and welding area size compared to the traditional steel-to-steel fusion welding process.

[0076] According to some embodiments of this utility model, such as Figure 2 As shown, the side of the main body 11 facing the branch pipe 20 (e.g.) Figure 2 The upper side of the main body 11 shown has a weight-reducing groove 114 recessed toward the connecting pipe 12. This reduces the weight of the main body 11, making it easier to transport the dispenser 10. At the same time, it reduces the amount of material used in the dispenser 10, thereby reducing production costs.

[0077] The HVAC device according to a second aspect of the present invention includes a distributor assembly 100 according to a first aspect of the present invention.

[0078] The following will refer to Figures 1-6 Describes a dispenser assembly 100 according to two specific embodiments of the present invention.

[0079] Reference Figure 2 The distributor assembly 100 includes a distributor 10, a branch pipe 20, an adapter pipe 40, and a connecting pipe 30. The distributor 10 is made of flexible stainless steel.

[0080] Specifically, the distributor 10 includes a main body 11 and a connector 12. The main body 11 is located on the upper side of the connector 12. A flow channel 113, a second interface 112, and a plurality of first interfaces 111 are formed in the main body 11. There are a plurality of branch pipes 20. The plurality of branch pipes 20 correspond one-to-one with the plurality of first interfaces 111 and are plugged in. The upper end of the flow channel 113 is connected to the plurality of first interfaces 111 and the lower end is connected to the second interface 112. The upper end of the connector 12 is connected to the second interface 112, and the lower end of the connector 12 is connected to other structures.

[0081] The main body 11 is tapered. In the direction from the main body 11 to the connector 12, the cross-sectional dimension of the outer contour of the main body 11 gradually decreases. Multiple first interfaces 111 are arranged at intervals along the circumference of the main body 11. The flow channel 113 is formed in a ring shape along the circumference of the main body. In the direction from the main body 11 to the connector 12, the flow channel 113 extends obliquely toward the central axis of the main body 11.

[0082] The upper end of the connecting pipe 30 is connected to the lower end of the connecting pipe part 12. The connecting pipe 30 and the connecting pipe part 12 are inserted together, with an insertion depth of 5mm-20mm. The fitting clearance between the connecting pipe 30 and the connecting pipe part 12 is 0.1mm-0.2mm. The connecting pipe 30 is a copper pipe or a copper alloy pipe. The adapter pipe 40 is connected between the connecting pipe part 12 and the connecting pipe 30. The adapter pipe 40 is a copper sleeve, and the connecting pipe 30 is welded to the connecting pipe part 12.

[0083] A transition pipe 40 is provided between the connecting pipe 30 and the connecting pipe part 12. The transition pipe 40 includes a first transition pipe 41 and a second transition pipe 42. The first transition pipe 41 and the second transition pipe 42 are welded together. The first transition pipe 41 is welded to the main body part 11, and the second transition pipe 42 is welded to the connecting pipe 30.

[0084] Furthermore, the flexible stainless steel is austenitic stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm.

[0085] Flexible stainless steel is composed of the following components by weight percentage: C: less than 0.02%, Si: 0.5% to 1%, Mn: 1 to 2%, Cr: 16 to 18%, Ni: 9 to 11%, Cu: 2 to 4%, Mo: 0 to 0.02%, P: less than 0.03%, S: less than 0.03%, with the remainder consisting of Fe and unavoidable impurities. The Md30 grade of flexible stainless steel has a temperature range of -50℃ to -80℃.

[0086] The yield strength of flexible stainless steel is 140-180 MPa; the tensile strength is 400-600 MPa; the elongation is 50-80%; the yield strength ratio is less than 0.4; and the hardness is 100-120 Hv.

[0087] The wall thickness of flexible stainless steel pipes is 1.2mm to 1.5mm.

[0088] In addition, when the branch pipe 20 and the distributor 10 are made of flexible stainless steel, the branch pipe 20 and the main body 12 of the distributor 10 are welded together by a first solder, such as... Figure 3 and Figure 4 As shown in the figure, X represents the first solder, where,

[0089] The first solder contains, by weight, Cu: 46%–50%, Ni: 9%–11%, Si: 0.04%–0.25%, with the remainder consisting of Zn and unavoidable impurities;

[0090] The flux used when applying the first solder consists of 60%-80% boric acid, 5%-15% fluoride, and 10%-20% potassium borate, calculated by weight.

[0091] The melting temperature t1 when using the first solder satisfies: 910℃≤t1≤935℃;

[0092] The brazing temperature t2 when using the first solder satisfies: 950℃≤t2≤975℃.

[0093] In addition, when the distributor 10 is made of flexible stainless steel and the branch pipe 20 is made of copper alloy, the branch pipe 20 is welded to the main body 12 of the distributor 10 using a second solder. Figure 3 and Figure 4 As shown in the figure, X represents the second solder, which contains Cu: 57%-61%, Sn: 1.0%-1.5%, Si: 0.05%-0.2% by Wt%, with the remainder consisting of Zn and unavoidable impurities;

[0094] The flux used when using the second solder consists of 60%-80% boric acid, 5%-15% fluoride, and 10%-20% potassium borate, calculated by weight.

[0095] When using the second solder, the melting temperature t1 must satisfy: 880℃≤t1≤890℃;

[0096] When using the second solder, the brazing temperature t2 must satisfy: 920℃≤t2≤930℃.

[0097] Furthermore, when both the distributor 10 and the connecting pipe 30 are made of flexible stainless steel, the first adapter pipe 41 and the connecting pipe 12 are welded together using a second solder. Figure 6 The letter X indicates the second solder. The first adapter pipe 41 and the second adapter pipe 42 are connected by tin bronze solder or silver copper solder. Figure 6 The Y in the middle indicates tin bronze solder or silver copper solder welding. The second adapter pipe 41 and the connecting pipe 30 are welded using the second solder.

[0098] According to the present invention, the distributor assembly 100, by setting one of the distributor 10 and the branch pipe 20 as a flexible stainless steel component, can reduce the installation difficulty between the distributor 10 and the branch pipe 20, thereby reducing the assembly time of the HVAC system and reducing production costs; at the same time, it can also reduce the risk of cracking at the connection between the distributor 10 and the branch pipe 20 due to vibration, thereby improving the reliability of the HVAC system.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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 dispenser assembly (100) characterized by, include: Distributor (10); Multiple branch pipes (20), all of which are connected to the distributor (10); At least one of the distributor (10) and the branch pipe (20) is made of flexible stainless steel.

2. The dispenser assembly (100) according to claim 1, characterized in that The distributor (10) is provided with a plurality of first interfaces (111), and there are a plurality of branch pipes (20). The plurality of branch pipes (20) correspond one-to-one with the plurality of first interfaces (111) and are plugged in and connected.

3. The dispenser assembly (100) of claim 2, wherein, The distributor (10) is provided with a flow channel (113) and a second interface (112). One end of the flow channel (113) is connected to a plurality of first interfaces (111) and the other end is connected to the second interface (112).

4. The dispenser assembly (100) according to claim 3, characterized in that, The distributor (10) includes: The main body (11) has the flow channel (113) formed within it, and a plurality of the first interfaces (111) are formed at one end of the main body (11). A connector (12) is connected to the side of the main body (11) away from the first interface (111), and the inner side of the connector (12) defines the second interface (112).

5. The dispenser assembly (100) according to claim 4, characterized in that, The main body (11) is tapered, and the cross-sectional dimension of the outer contour of the main body (11) gradually decreases in the direction from the main body (11) to the connecting pipe (12). The first interface (111) is located on the side of the main body (11) away from the connector (12). A plurality of first interfaces (111) are arranged at intervals along the circumference of the main body (11). The flow channel (113) is formed in a ring shape along the circumference of the main body. In the direction from the main body (11) to the connector (12), the flow channel (113) extends obliquely toward the central axis of the main body (11).

6. The dispenser assembly (100) according to any one of claims 1-5, 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.

7. The dispenser assembly (100) according to any one of claims 1-5, characterized in that, The Md30 of the flexible stainless steel is -50℃ to -80℃.

8. The dispenser assembly (100) according to any one of claims 1-5, characterized in that, The flexible stainless steel is austenitic flexible stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm.

9. The dispenser assembly (100) according to any one of claims 1-5, characterized in that, The wall thickness of flexible stainless steel pipes is 1.2mm to 1.5mm.

10. The dispenser assembly (100) according to claim 4, characterized in that, Also includes: A connecting pipe (30) is provided, one end of which is connected to the connecting pipe (12). The connecting pipe (30) is a copper pipe, a copper alloy pipe, or a flexible stainless steel pipe.

11. The dispenser assembly (100) according to claim 10, characterized in that, Also includes: The adapter pipe (40) is connected between the connector part (12) and the connecting pipe (30), wherein the connecting pipe (30) is a copper pipe or a copper alloy pipe, and the adapter pipe (40) is a copper sleeve.

12. The dispenser assembly (100) according to claim 10, characterized in that, The connecting pipe (30) is inserted into the connecting tube (12), wherein the insertion depth of the connecting pipe (30) is 5mm-20mm, and / or the fitting gap between the connecting pipe (30) and the connecting tube (12) is 0.1mm-0.2mm.

13. The dispenser assembly (100) according to claim 10, characterized in that, The connecting pipe (30) is welded to the connecting pipe (12).

14. The dispenser assembly (100) according to claim 4, characterized in that, The main body (11) has a weight-reducing groove (114) recessed towards the connecting pipe (12) on the side facing the branch pipe (20).

15. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, Includes the dispenser assembly (100) according to any one of claims 1-14.

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