Fluid pipeline and heating and ventilation device

Abstract

The utility model discloses a fluid pipeline and a heating and ventilation device. The fluid line includes: a first steel pipe; a second steel pipe; the first transition part is connected with the first steel pipe, and part of the first transition part protrudes out of one axial end of the first steel pipe to form a first protruding part; the second transition part is connected with the second steel pipe, and the part of the second transition part protrudes out of one axial end of the second steel pipe to form a second protruding part; a gap is formed between the end face of one axial end of the first steel pipe and the end face of one axial end of the second steel pipe in the axial direction of the fluid pipeline. According to the fluid pipeline, the gap is formed between the end face of one axial end of the first steel pipe and the end face of one axial end of the second steel pipe in the axial direction of the fluid pipeline, and under the condition that the first protruding part and the second protruding part are welded, welding heat between the first transition part and the second transition part is prevented from being welded to the first steel pipe and the second steel pipe; therefore, the safety of the fluid pipeline is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a fluid pipeline and a HVAC device. Background Art

[0002] At present, refrigerant pipelines use steel pipes as the main body of the pipeline to reduce costs. Among them, the steel pipe body usually uses two copper sleeves at the connection to connect two steel pipes respectively, and then the two copper sleeves are connected and fixed to form a complete refrigerant pipeline. However, during the connection process of the two copper sleeves, it is easy to cause uneven heating of the steel refrigerant pipeline, which will cause cracks in the steel pipe and poor safety. Utility Model Content

[0003] The embodiment of the utility model provides a fluid pipeline and a HVAC device to solve at least one of the above-mentioned technical problems.

[0004] A fluid pipeline provided by the embodiment of the utility model comprises:

[0005] First steel pipe;

[0006] Second steel pipe;

[0007] A first transition portion, wherein the material of the first transition portion is different from that of the first steel pipe, the first transition portion is connected to the first steel pipe, and a portion of the first transition portion is protruded at one axial end of the first steel pipe to form a first protrusion;

[0008] A second transition portion, wherein the material of the second transition portion is different from the material of the second steel pipe, the second transition portion is connected to the second steel pipe, and a portion of the second transition portion is protruded at one axial end of the second steel pipe to form a second protrusion;

[0009] The first protrusion is connected to the second protrusion, and an end surface of one axial end of the first steel pipe and an end surface of one axial end of the second steel pipe have a gap in the axial direction of the fluid pipeline.

[0010] The above-mentioned fluid pipeline is connected by the first protrusion and the second protrusion to ensure that the first steel pipe is connected to the second steel pipe. The end face of one axial end of the first steel pipe and the end face of one axial end of the second steel pipe have a gap in the axial direction of the fluid pipeline. When the first protrusion and the second protrusion are welded, the welding heat between the first transition part and the second transition part is avoided from burning to the first steel pipe and the second steel pipe, thereby preventing the first steel pipe and the second steel pipe from overheating and generating cracks, thereby improving the safety of the fluid pipeline.

[0011] In certain embodiments, the first transition portion and the first steel pipe are connected by furnace welding, and / or;

[0012] The second transition portion and the second steel pipe are connected by furnace welding.

[0013] In some embodiments, the first protrusion and the second protrusion are connected by flame welding.

[0014] In some embodiments, the length of the first protrusion is in the range of [2 mm, 10 mm].

[0015] In certain embodiments, the material of the first steel pipe includes carbon steel or stainless steel, and / or;

[0016] The material of the second steel pipe includes carbon steel or stainless steel.

[0017] In certain embodiments, the material of the first transition portion is any one of aluminum, aluminum alloy, copper and copper alloy, and / or;

[0018] The material of the second transition portion is any one of aluminum, aluminum alloy, copper and copper alloy.

[0019] In certain embodiments, the first transition portion is a tubular structure; and / or the second transition portion is a tubular structure.

[0020] In some embodiments, the first transition portion includes a first connection portion connected to the first protrusion, the first connection portion is provided at least a portion of the inner periphery of the first steel pipe, the second transition portion includes a second connection portion connected to the second protrusion, the second connection portion is sleeved at least a portion of the outer periphery of the second steel pipe, a portion of the second transition portion is located in the first transition portion, and another portion protrudes from the first transition portion;

[0021] The first protrusion and the second steel tube do not overlap in the upward direction of the fluid tube path, or the first protrusion and the second steel tube overlap in the upward direction of the fluid tube path.

[0022] In some embodiments, a length of the second transition portion protruding from another portion of the first transition portion is greater than 5 mm.

[0023] In some embodiments, the first steel pipe includes a first body and a first matching portion, the first matching portion is located at the connection between the first steel pipe and the first transition portion, the diameter of the first matching portion is smaller than the diameter of the first body, or the diameter of the first matching portion is equal to the diameter of the first body, or the diameter of the first matching portion is larger than the diameter of the first body.

[0024] In some embodiments, the second steel pipe includes a second body and a second matching portion, the second matching portion is located at the connection between the second steel pipe and the second transition portion, the diameter of the second matching portion is smaller than the diameter of the second body, or the diameter of the second matching portion is equal to the diameter of the second body, or the diameter of the second matching portion is larger than the diameter of the second body.

[0025] A HVAC device provided in an embodiment of the utility model includes the fluid pipeline described in any of the above embodiments.

[0026] A HVAC device provided in an embodiment of the utility model includes the fluid pipeline, element components and refrigerant piping connected to the element components of any of the above-mentioned embodiments, the inlet piping or outlet piping of the element components is the first steel pipe of the fluid pipeline of any of the above-mentioned embodiments; the refrigerant piping is the second steel pipe of the fluid pipeline of any of the above-mentioned embodiments.

[0027] The above-mentioned HVAC device is connected by the first protrusion and the second protrusion to ensure that the first steel pipe is connected to the second steel pipe. The end face of one axial end of the first steel pipe and the end face of one axial end of the second steel pipe have a gap in the axial direction of the fluid pipeline. When the first protrusion and the second protrusion are welded, the welding heat between the first transition part and the second transition part is avoided from burning the first steel pipe and the second steel pipe, preventing the first steel pipe and the second steel pipe from overheating and generating cracks, thereby improving the safety of the fluid pipeline.

[0028] In certain embodiments, the element component is at least one of a valve body, a gas-liquid separator, a compressor, a filter, an oil separator, and a muffler.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a cross-sectional view of a fluid pipeline according to an embodiment of the utility model;

[0032] Figure 2 yes Figure 1 A magnified view of part A;

[0033] Figure 3 is another cross-sectional view of the fluid pipeline according to the embodiment of the utility model;

[0034] Figure 3a yes Figure 3An exploded schematic diagram of the fluid pipeline;

[0035] Figure 3b is another cross-sectional view of the fluid pipeline of the embodiment of the utility model;

[0036] Figure 4 is another cross-sectional view of the fluid pipeline of the embodiment of the utility model;

[0037] Figure 5 yes Figure 4 A magnified view of part B;

[0038] Figure 6 It is a structural schematic diagram of the connection between the first steel pipe and the first transition part in an embodiment of the utility model;

[0039] Figures 7 to 9 It is a structural schematic diagram of the connection between the second steel pipe and the second transition part in an embodiment of the utility model.

[0040] Description of main component reference numerals:

[0041] Fluid pipeline 100, first steel pipe 10, second steel pipe 30, first transition portion 50, second transition portion 70, first body 12, first matching portion 14, second body 32, second matching portion 34, first protrusion 52, first connecting portion 54, second protrusion 72, second connecting portion 74. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The disclosure herein provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0047] See also Figures 1 to 3 The embodiment of the utility model provides a fluid pipeline 100. The fluid pipeline 100 includes a first steel pipe 10, a second steel pipe 30, a first transition portion 50, and a second transition portion 70. The material of the first transition portion 50 is different from that of the first steel pipe 10. The first transition portion 50 is connected to the first steel pipe 10. A portion of the first transition portion 50 is protrudingly arranged at one axial end of the first steel pipe 10 to form a first protrusion 52. The material of the second transition portion 70 is different from that of the second steel pipe 30. The second transition portion 70 is connected to the second steel pipe 30. A portion of the second transition portion 70 is protrudingly arranged at one axial end of the second steel pipe 30 to form a second protrusion 72. The first protrusion 52 and the second protrusion 72 are connected, and an end face of one axial end of the first steel pipe 10 and an end face of one axial end of the second steel pipe 30 have a gap in the axial direction of the fluid pipeline 100.

[0048] The above-mentioned fluid pipeline 100 is connected by the first protrusion 52 and the second protrusion 72 to ensure that the first steel pipe 10 is connected to the second steel pipe 30. The end face of one axial end of the first steel pipe 10 and the end face of one axial end of the second steel pipe 30 have a gap in the axial direction of the fluid pipeline 100. When the first protrusion 52 and the second protrusion 72 are welded, the welding heat between the first transition part 50 and the second transition part 70 is prevented from burning to the first steel pipe 10 and the second steel pipe 30, thereby preventing the first steel pipe 10 and the second steel pipe 30 from overheating and generating cracks, thereby improving the safety of the fluid pipeline 100.

[0049] Specifically, in one embodiment, the fluid pipeline 100 may be a refrigerant pipeline, which may be used in an air conditioner to transport a working medium such as a refrigerant to ensure that components such as a condenser and an evaporator in the air conditioner operate normally.

[0050] In one embodiment, please combine Figures 1 to 3 The first steel pipe 10, the first transition portion 50, the second transition portion 70 and the second steel pipe 30 can all be tubular materials. For example, the tubular material can be in the shape of a hollow cylinder, and the diameters can decrease successively. Of course, the diameters can also increase successively, and can also be in other orders. It is only necessary to ensure that the first steel pipe 10, the first transition portion 50, the second transition portion 70 and the second steel pipe 30 form a fluid pipeline 100 with good connection stability, thereby ensuring the safe transportation of the working medium in the fluid pipeline 100. No specific restrictions are made here.

[0051] Please combine Figures 1 to 5 The end face of one axial end of the first steel tube 10 is the axial upper end face of the first steel tube 10 , and the end face of one axial end of the second steel tube 30 is the axial lower end face of the second steel tube 30 .

[0052] In other embodiments, the fluid pipeline 100 may also be in other shapes. It is only necessary to ensure that the first steel pipe 10, the first transition portion 50, the second transition portion 70 and the second steel pipe 30 are stably connected to ensure the safe operation of the fluid pipeline 100. No specific restrictions are made here.

[0053] In one embodiment, if Figures 1 to 5 As shown, the first transition portion 50 is protruded at one end of the first steel pipe 10 to form a first protrusion 52, so that the welding difficulty between the first transition portion 50 and the second transition portion 70 is reduced, thereby improving the shortcomings of the flush copper sleeve welding method (for example, the flush sleeve solder is difficult to adhere to the weld and easily causes the weld to be overburned) and the difficulty in observing the welding state, thereby improving the connection stability of the fluid pipeline 100.

[0054] In one embodiment, if Figures 1 to 5As shown, the second transition portion 70 is protrudingly provided at one end of the second steel pipe 30 to form a second protrusion 72 to ensure that the first protrusion 52 and the second protrusion 72 are matched and welded, which has good safety.

[0055] That is, when the first protrusion 52 and the second protrusion 72 are correspondingly welded, the welding heat generated between the first protrusion 52 and the second protrusion 72 is not easily transferred from the first transition portion 50 to the first steel pipe 10, and the welding heat generated between the first protrusion 52 and the second protrusion 72 is not easily transferred from the second transition portion 70 to the second steel pipe 30, or the welding heat generated between the first protrusion 52 and the second protrusion 72 is not enough to cause a great impact on the first steel pipe 10 and the second steel pipe 30, thereby reducing the risk of fluid leakage caused by cracks in the first steel pipe 10 and the second steel pipe 30, thereby ensuring the safe operation of the fluid pipeline 100.

[0056] In one embodiment, the second protrusion 72 can be connected to the inner side of the first protrusion 52 (eg, Figure 1 and Figure 3 As shown), of course, the second protrusion 72 can be connected to the outside of the first protrusion 52 (not shown), and it is only necessary to change the diameter of the first protrusion 52 and the second protrusion 72 to ensure that the first steel pipe 10 and the second steel pipe 30 are stably connected, and no specific limitation is made here.

[0057] In one embodiment, if Figure 1 and Figure 2 As shown, there is a gap between the end face of one axial end of the first steel pipe 10 and the end face of one axial end of the second steel pipe 30 in the axial direction of the fluid pipeline 100. It can be understood that the end face of one axial end of the first steel pipe 10 and the end face of one axial end of the second steel pipe 30 are spaced a certain distance E in the axial direction of the fluid pipeline 100, so as to avoid the first protrusion 52 and the second protrusion 72 from welding to the first steel pipe 10 and the second steel pipe 30 due to welding heat when welding at the distance E, and prevent the first steel pipe 10 and the second steel pipe 30 from overheating and generating cracks to cause fluid leakage, thereby improving the connection stability of the first steel pipe 10 and the second steel pipe 30, and further ensuring the safe operation of the fluid pipeline 100.

[0058] In one embodiment, if Figure 3 and Figure 3a As shown, the assembly sequence of the fluid pipeline 100 can be: pre-welding the first steel pipe 10 and the first transition portion 50 into an integral body, and pre-welding the second steel pipe 30 and the second transition portion 70 into another integral body, and then connecting the first protrusion 52 and the second protrusion 72 by welding, so that the first transition portion 50 and the second transition portion 70 are fixedly connected, that is, the two integral bodies are connected together, thereby ensuring the indirect connection of the first steel pipe 10 and the second steel pipe 30, and further ensuring the overall connection stability of the fluid pipeline 100.

[0059] exist Figure 1 and Figure 2 as well as Figure 4 and Figure 5 In the embodiment, the first steel pipe 10 is a variable diameter steel pipe, and the second steel pipe 30 is a constant diameter steel pipe. Figure 3 and Figure 3b In the figure, the first steel pipe 10 and the second steel pipe 30 are both variable diameter steel pipes. Figure 3 and Figure 3b In the embodiment, the connection method between the first transition portion and the second transition portion is also applicable to Figure 1 and Figure 2 as well as Figure 4 and Figure 5 The fluid pipeline 100 is a fluid pipeline in which the first steel pipe 10 is a constant diameter steel pipe and the second steel pipe 30 is a variable diameter steel pipe.

[0060] In one embodiment, the first protrusion 52 and the second protrusion 72 are connected by welding between copper materials. The welding temperature is low, the welding is simple, the cost is low, and it is convenient and feasible, thereby ensuring that the first steel pipe 10 and the second steel pipe 30 are indirectly and stably connected with good safety.

[0061] It can be understood that in one example, the fluid pipeline 100 can be connected using a welding process, such as flame welding and furnace welding, or other welding processes, or other non-welding connection methods to ensure that the fluid pipeline 100 is stably connected and works safely, without specific limitations.

[0062] In some embodiments, the first transition portion 50 and the first steel pipe 10 are connected by furnace welding, and / or;

[0063] The second transition portion 70 and the second steel pipe 30 are connected by furnace welding.

[0064] In this way, the first transition portion 50 is ensured to be stably connected to the first steel pipe 10, and the second transition portion 70 is ensured to be stably connected to the second steel pipe 30, which has good safety.

[0065] Specifically, in one embodiment, the first transition portion 50 and the first steel pipe 10 are connected by furnace welding to ensure that the first transition portion 50 and the first steel pipe 10 are connected as an integrated structure with good stability and high connection strength.

[0066] It can be understood that the connection between the first transition portion 50 and the first steel pipe 10 is achieved by welding the copper material and the steel. Since welding between the copper material and the steel is a relatively difficult process, it is difficult to obtain good weld quality using the traditional manual flame welding process, that is, it is easy to produce gaps that lead to fluid leakage. Therefore, it is necessary to use automated welding technology such as furnace welding or other connection processes to ensure that the first transition portion 50 is smoothly connected to the first steel pipe 10, thereby ensuring the connection stability of the fluid pipeline 100.

[0067] Similarly, in another embodiment, the second transition portion 70 and the second steel pipe 30 are connected by furnace welding to ensure that the second transition portion 70 and the second steel pipe 30 are connected as an integrated structure with good stability and high connection strength.

[0068] It can be understood that the connection between the second transition portion 70 and the second steel pipe 30 is achieved by welding the copper material and the steel. Since welding between the copper material and the steel is a relatively difficult process, it is difficult to obtain good weld quality using the traditional manual flame welding process, that is, it is easy to produce gaps that lead to fluid leakage. Therefore, it is necessary to use automated welding technology such as furnace welding or other connection processes to ensure that the second transition portion 70 and the second steel pipe 30 are smoothly connected, thereby ensuring the connection stability of the fluid pipeline 100.

[0069] Among them, the welding temperature between steel and copper materials is relatively high, wherein the welding temperature ranges from 1020°C to 1060°C. For example, the welding temperature between steel and copper materials is more than 100°C higher than the welding temperature between copper materials. In addition, the metal melting points of steel and copper materials are quite different, and auxiliary tools such as neutralizers are required to protect the performance of steel and copper materials. As a result, the traditional manual flame welding process cannot guarantee the connection stability of steel and copper materials, and furnace welding and other connection processes are used to ensure the stable connection of the fluid pipeline 100.

[0070] In some embodiments, the first protrusion 52 and the second protrusion 72 are connected by flame welding.

[0071] In this way, the first protrusion 52 and the second protrusion 72 are ensured to be stably connected, thereby ensuring the first transition portion 50 and the second transition portion 70 are stably connected, and further ensuring the overall connection stability of the fluid pipeline 100 with good safety.

[0072] Specifically, in one embodiment, the first protrusion 52 and the second protrusion 72 are connected by flame welding to ensure that the first transition portion 50 and the second transition portion 70 are connected as an integrated structure with good stability and high connection strength.

[0073] It can be understood that the connection between the first protrusion 52 and the second protrusion 72 is a welding connection between copper materials, and good weld quality can be obtained using a traditional manual flame welding process. For example, the first protrusion 52 and the second protrusion 72 are preheated in advance and the welding temperature, welding time and welding environment and other conditions are controlled to ensure a smooth connection between the first transition portion 50 and the second transition portion 70, thereby ensuring the connection stability of the fluid pipeline 100.

[0074] That is, by adopting the flame welding process, the mating connection position of the first protrusion 52 and the second protrusion 72 is heated to the melting point, wherein the flame welding temperature range is 700°C to 900°C, which is easy to achieve manual welding, and welding materials can be appropriately added and quickly cooled and solidified, thereby ensuring the connection stability between the first protrusion 52 and the second protrusion 72, and then ensuring the stable welding of the first transition part 50 and the second transition part 70, so that the fluid pipeline 100 is stably connected and has good safety.

[0075] See also Figures 1 to 3 In some embodiments, the length H of the first protrusion 52 is in the range of [2 mm, 10 mm].

[0076] In this way, the first protrusion 52 and the second transition portion 70 are stably connected, the risk of the first steel pipe 10 being burned by welding heat is reduced, and safety is improved.

[0077] Specifically, in one embodiment, the length H of the first protrusion 52 should be selected within a suitable range so that the first transition portion 50 extends out of the first steel pipe 10 with an appropriate length. During the welding process of the first transition portion 50 and the second transition portion 70, the first protrusion 52 leaves a welding position of an appropriate length for the first transition portion 50, thereby ensuring the welding quality between the first transition portion 50 and the second transition portion 70 and improving safety.

[0078] In one embodiment, the length H of the first protrusion 52 is in the range of [2 mm, 10 mm] to ensure that the first protrusion 52 is safely and stably connected to the second transition portion 70, which has good practicality.

[0079] When the length H of the first protrusion 52 is less than 2 mm, the length of the first protrusion 52 is too short, which is inconvenient to weld, and the first protrusion 52 is easily burned to the first steel pipe 10 during the welding process, causing the first steel pipe 10 to crack due to uneven heating, resulting in leakage of the fluid pipeline 100, and poor safety.

[0080] When the length H of the first protrusion 52 is greater than 10 mm, the length of the first protrusion 52 is too long, so that the first transition portion 50 is easily deformed and the material consumption is large, resulting in material waste and high cost.

[0081] For example, in some examples, the length H of the first protrusion 52 can be 2 mm, 3 mm, 5 mm, 6 mm, 8 mm, 9 mm, 10 mm, or other length values ​​between 2 mm and 10 mm.

[0082] Similarly, in one embodiment, the length value of the second protrusion 72 is determined based on actual production experience, and no specific limitation is made here as long as the second protrusion 72 and the first protrusion 52 are safely welded to form an integrated stable structure.

[0083] In some embodiments, the material of the first steel pipe 10 includes carbon steel or stainless steel, and / or;

[0084] The material of the second steel pipe 30 includes carbon steel or stainless steel.

[0085] In this way, the strength and hardness of the first steel pipe 10 and the second steel pipe 30 are improved, thereby ensuring that the fluid pipeline 100 has high structural strength, safety and stability.

[0086] Specifically, in one embodiment, the material of the first steel pipe 10 includes carbon steel or stainless steel to improve the structural strength of the first steel pipe 10 , thereby ensuring safe transportation of the working medium in the fluid pipeline 100 with good stability.

[0087] For example, in one example, when the material of the first steel pipe 10 is carbon steel, the first steel pipe 10 is composed of iron and carbon components, wherein the carbon content is between 0.04% and 2.5%, so that the first steel pipe 10 has the characteristics of easy processing and high hardness, such as high carbon steel, thereby ensuring that the first steel pipe 10 has higher hardness and strength, and further ensuring the safe operation of the fluid pipeline 100.

[0088] In another example, when the material of the first steel pipe 10 is stainless steel, the first steel pipe 10 is composed of components such as iron, carbon and chromium. Since metallic chromium has strong corrosion resistance, the first steel pipe 10 has the characteristics of corrosion resistance and high hardness, thereby ensuring that the fluid pipeline 100 works safely in an environment with corrosion risks.

[0089] In other examples, the first steel pipe 10 may also be made of other iron-containing materials to ensure that the first steel pipe 10 has higher hardness and strength, which is not specifically limited here.

[0090] Similarly, in one embodiment, the material of the second steel pipe 30 includes carbon steel or stainless steel to improve the structural strength of the second steel pipe 30 , thereby ensuring safe transportation of the working medium in the fluid pipeline 100 .

[0091] The formation and purpose of the second steel pipe 30 are the same as those of the first steel pipe 10 , and will not be described again to avoid redundancy.

[0092] In other embodiments, the second steel pipe 30 may also be made of other iron-containing materials to ensure that the second steel pipe 30 has higher hardness and strength, which is not specifically limited here.

[0093] In some embodiments, the material of the first transition portion 50 is any one of aluminum, aluminum alloy, copper and copper alloy, and / or the material of the second transition portion 70 is any one of aluminum, aluminum alloy, copper and copper alloy.

[0094] Thus, the materials of the specific first transition portion 50 and the second transition portion 70 may be selected.

[0095] Specifically, in one embodiment, the material of the first transition portion 50 is aluminum. In one embodiment, the material of the first transition portion 50 is aluminum alloy. In one embodiment, the material of the first transition portion 50 is copper. In one embodiment, the material of the first transition portion 50 is copper alloy.

[0096] In one embodiment, the material of the second transition portion 70 is aluminum. In one embodiment, the material of the second transition portion 70 is aluminum alloy. In one embodiment, the material of the second transition portion 70 is copper. In one embodiment, the material of the second transition portion 70 is copper alloy.

[0097] The materials of the first transition portion 50 and the second transition portion 70 may be the same or different.

[0098] In certain embodiments, the first transition portion 50 is a tubular structure; and / or the second transition portion 70 is a tubular structure.

[0099] Thus, installation of the first transition portion 50 and the second transition portion 70 is facilitated.

[0100] Specifically, in one embodiment, the first transition portion 50 is a tubular structure. In one embodiment, the second transition portion 70 is a tubular structure. In one embodiment, the first transition portion 50 is a tubular structure and the second transition portion 70 is a tubular structure.

[0101] The tubular structure can facilitate the installation of the transition part on the steel pipe, for example, it can be installed by direct sleeve installation. Specifically, the first transition part 50 is a tubular structure, and the first transition part 50 can be conveniently sleeved directly into the first steel pipe 10 or sleeved outside the first steel pipe 10. The second transition part 70 is a tubular structure, and the second transition part 30 can be conveniently sleeved directly into the second steel pipe 30 or sleeved outside the second steel pipe 30.

[0102] See also Figure 1 , Figure 2 , Figure 4 and Figure 5In some embodiments, the first transition portion 50 includes a first connection portion 54 connected to the first protrusion 52, and the first connection portion 54 is disposed on at least a portion of the inner periphery of the first steel pipe 10. The second transition portion 70 includes a second connection portion 74 connected to the second protrusion 72, and the second connection portion 74 is sleeved on at least a portion of the outer periphery of the second steel pipe 30. A portion of the second transition portion 70 is located in the first transition portion 50, and another portion protrudes from the first transition portion 50.

[0103] The first protrusion 52 and the second steel tube 30 do not overlap in the radial direction of the fluid pipeline 100 , or the first protrusion 52 and the second steel tube 30 overlap in the radial direction of the fluid pipeline 100 .

[0104] In this way, the first steel pipe 10, the first transition portion 50, the second transition portion 70 and the second steel pipe 30 are ensured to be stably connected, thereby improving the ability of the fluid pipeline 100 to safely transport the working medium.

[0105] Specifically, in one embodiment, the first transition portion 50 includes a first connecting portion 54 connected to the first protrusion 52, so that the first transition portion 50 is stably connected to the first steel pipe 10 through the first connecting portion 54, thereby ensuring that the first protrusion 52 stably extends out of the first steel pipe 10 and is stably connected to the second transition portion 70, thereby ensuring the stability of the fluid pipeline 100.

[0106] It can be understood that the first connection portion 54 is a part of the first transition portion 50, and the first connection portion 54 is arranged on at least a part of the inner circumference of the first steel pipe 10, that is, the first connection portion 54 can be arranged on a part of the inner circumference of the first steel pipe 10, or it can cover the entire inner circumference of the first steel pipe 10 to ensure that the first transition portion 50 is stably connected to the first steel pipe 10, thereby improving the connection stability of the first protrusion 52.

[0107] In one embodiment, the second transition portion 70 includes a second connecting portion 74 connected to the second protrusion 72, so that the second transition portion 70 is stably connected to the second steel pipe 30 through the second connecting portion 74, thereby ensuring that the second protrusion 72 stably extends out of the second steel pipe 30 and stably connects to the first transition portion 50, thereby ensuring the stability of the fluid pipeline 100.

[0108] It can be understood that the second connection portion 74 serves as a part of the second transition portion 70, and the second connection portion 74 is sleeved on at least a part of the outer periphery of the second steel pipe 30, that is, the second connection portion 74 can be arranged at a part of the outer periphery of the second steel pipe 30, or it can wrap the outer periphery of the second steel pipe 30 to ensure that the second transition portion 70 is stably connected to the second steel pipe 30, thereby improving the connection stability between the second protrusion 72 and the first protrusion 52.

[0109] In one embodiment, if Figure 1 and Figure 2 as well as Figure 3 and Figure 3b As shown, the first protrusion 52 and the second steel pipe 30 do not overlap in the radial direction of the fluid pipeline 100, so that the first protrusion 52 and the second steel pipe 30 maintain a certain distance in the axial direction of the fluid pipeline 100, thereby improving the safety of welding between the first protrusion 52 and the second protrusion 72, avoiding welding heat from burning to the second steel pipe 30, resulting in uneven heating and cracks causing fluid leakage, while saving material usage and reducing costs.

[0110] In another embodiment, Figure 4 and Figure 5 As shown, the first protrusion 52 and the second steel pipe 30 overlap in the radial direction of the fluid pipeline 100, so that the first protrusion 52 and the second steel pipe 30 have an overlapping area in the axial direction of the fluid pipeline 100, thereby improving the connection stability between the first transition portion 50 and the second transition portion 70, that is, the fluid pipeline 100 forms at least two layers of pipeline thickness in the radial direction of the fluid pipeline 100, so that the fluid pipeline 100 is not easy to deform or bend, has high structural strength, and has good safety.

[0111] It is worth noting that when the first transition portion 50 and the second steel pipe 30 overlap in the radial direction of the fluid pipeline 100, protective measures can be adopted to ensure that the second steel pipe 30 is protected from welding damage by welding heat. For example, the protective measures can be to use a wet cloth to provide a continuous cooling effect for the second steel pipe 30, or other protective measures can be used to improve the connection stability and safety of the fluid pipeline 100, and no specific restrictions are made here.

[0112] See also Figures 1 to 5 In some embodiments, the length L of the second transition portion 70 protruding from another portion of the first transition portion 50 is greater than 5 mm.

[0113] In this way, the second transition portion 70 and the first transition portion 50 are easily welded, the welding difficulty is reduced, and the safety is improved.

[0114] Specifically, in one embodiment, a length L of another portion of the second transition portion 70 protruding from the first transition portion 50 should be selected to have a suitable value to ensure the welding quality between the second transition portion 70 and the first transition portion 50 , thereby improving the connection stability of the fluid pipeline 100 .

[0115] In one embodiment, if Figures 1 to 5 As shown, the length L of the other part of the second transition portion 70 protruding from the first transition portion 50 is greater than 5 mm, so that the second transition portion 70 and the first transition portion 50 are easy to weld, and the welding status can be conveniently observed to avoid overburning of the weld to cause cracks in the fluid pipeline 100, thereby improving safety.

[0116] The upper limit of the length L can be determined based on empirical values ​​and is not specifically limited here. The length L can be greater than or equal to 5 mm.

[0117] In some examples, the length L of the second transition portion 70 protruding from another portion of the first transition portion 50 may be 5.1 mm, 5.3 mm, 5.4 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, or other values ​​greater than 5 mm.

[0118] In one embodiment, when the length L of another portion of the second transition portion 70 protruding from the first transition portion 50 is less than or equal to 5 mm, the length L is too short, so that the second transition portion 70 and the first transition portion 50 are basically welded in a flush port, resulting in great welding difficulty, poor welding quality, and low safety.

[0119] In some embodiments, the first steel pipe 10 includes a first body 12 and a first matching portion 14, the first matching portion 14 is located at the connection between the first steel pipe 10 and the first transition portion 50, the diameter D2 of the first matching portion 14 is smaller than the diameter D1 of the first body 12, or the diameter D2 of the first matching portion 14 is equal to the diameter D1 of the first body 12, or the diameter D2 of the first matching portion 14 is greater than the diameter D1 of the first body 12 ( Figure 6 ).

[0120] In this way, the diameter of the first matching portion 14 matches the diameter of the first transition portion 50 , thereby ensuring that the first steel pipe 10 and the first transition portion 50 are stably connected and have good sealing properties.

[0121] Specifically, in one embodiment, Figure 6 As shown, the first matching portion 14 is connected to the first body 12, and the first steel pipe 10 is sleeved on the outside of the first transition portion 50, so that the first matching portion 14 is matched and connected with the first connecting portion 54, thereby ensuring that the first steel pipe 10 and the first transition portion 50 are stably connected and have good safety.

[0122] The first matching portion 14 and the first connecting portion 54 can be welded into an integral structure by furnace welding, or other connection methods can be used to ensure the connection stability between the first steel pipe 10 and the first transition portion 50, which is not specifically limited here.

[0123] In one embodiment, if Figure 6As shown, the diameter D2 of the first matching portion 14 is greater than the diameter D1 of the first body 12, that is, the first body 12 is formed with a tapered structure having a gradual section and a tapered section, wherein the gradual section connects the first matching portion 14 and the tapered section, so that the first matching portion 14 is used to match and connect the first connecting portion 54, so that the first protrusion 52 of the first transition portion 50 can be sleeved outside the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0124] In another embodiment, the diameter D2 of the first matching portion 14 is smaller than the diameter D1 of the first body 12 (which can be Figure 7 To assist understanding), that is, the first body 12 is formed with a flaring structure having a gradient section and a flaring section, wherein the gradient section connects the first matching portion 14 and the flaring section, so that the first matching portion 14 is used to match and connect the first connecting portion 54, so that the first protrusion 52 of the first transition portion 50 can be sleeved outside the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0125] In another embodiment, the diameter D2 of the first matching portion 14 is equal to the diameter D1 of the first body 12 (which can be Figure 8 To assist understanding), that is, the first steel pipe 10 has no expansion structure and contraction structure, so that the diameters of the first matching portion 14 and the first body 12 are equal, wherein the first matching portion 14 is used to match and connect the first connecting portion 54, so that the first protrusion 52 of the first transition portion 50 can be sleeved outside the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0126] In summary, by setting the first body 12 and the first matching part 14 with different diameters, the diameter of the first matching part 14 matches the diameter of the first transition part 50, thereby ensuring a stable connection between the first steel pipe 10 and the first transition part 50, thereby improving the sealing of the fluid pipeline 100.

[0127] See also Figures 7 to 9 In some embodiments, the second steel pipe 30 includes a second body 32 and a second matching portion 34, the second matching portion 34 is located at the connection between the second steel pipe 30 and the second transition portion 70, the diameter D4 of the second matching portion 34 is smaller than the diameter D3 of the second body 32, or the diameter D4 of the second matching portion 34 is equal to the diameter D3 of the second body 32, or the diameter D4 of the second matching portion 34 is larger than the diameter D3 of the second body 32.

[0128] In this way, the diameter of the second matching portion 34 matches the diameter of the second transition portion 70 , thereby ensuring that the second steel pipe 30 and the second transition portion 70 are stably connected and have good sealing properties.

[0129] Specifically, in one embodiment, Figures 7 to 9As shown, the second matching portion 34 is connected to the second body 32, and the second transition portion 70 is sleeved on the outside of the second matching portion 34, so that the second matching portion 34 is matched and connected with the second connecting portion 74, thereby ensuring that the second steel pipe 30 and the second transition portion 70 are stably connected and have good safety.

[0130] The second matching portion 34 and the second connecting portion 74 may be welded into an integral structure by furnace welding, or other connection methods may be used to ensure the connection stability between the second steel pipe 30 and the second transition portion 70, which is not specifically limited here.

[0131] In one embodiment, if Figure 7 As shown, the diameter D4 of the second matching portion 34 is smaller than the diameter D3 of the second body 32, that is, the second body 32 forms a flaring structure with a gradient section and a flaring section, wherein the gradient section connects the second matching portion 34 and the flaring section, so that the second matching portion 34 is used to match and connect the second connecting portion 74, so that the first transition portion 50 can be sleeved outside the second protrusion 72 of the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0132] In another embodiment, Fig. 9 As shown, the diameter D4 of the second matching portion 34 is greater than the diameter D3 of the second body 32, that is, the second body 32 is formed with a tapered structure having a gradual section and a tapered section, wherein the gradual section connects the second matching portion 34 and the tapered section, so that the second matching portion 34 is used to match and connect the second connecting portion 74, so that the first transition portion 50 can be sleeved outside the second protrusion 72 of the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0133] In yet another embodiment, Figure 8 As shown, the diameter D4 of the second matching portion 34 is equal to the diameter D3 of the second body 32, that is, the second steel pipe 30 has no expansion structure and contraction structure, so that the diameters of the second matching portion 34 and the second body 32 are equal, wherein the second matching portion 34 is used to match and connect the second connecting portion 74, so that the first transition portion 50 can be sleeved outside the second protrusion 72 of the second transition portion 70, thereby ensuring that the fluid can be smoothly transported in the fluid pipeline 100 with good safety.

[0134] In summary, by providing the second body 32 and the second matching portion 34 with different diameters, the diameter of the second matching portion 34 matches the diameter of the second transition portion 70 , thereby ensuring a stable connection between the second steel pipe 30 and the second transition portion 70 , thereby improving the sealing of the fluid pipeline 100 .

[0135] The embodiment of the utility model provides a HVAC device (not shown), which includes the fluid pipeline 100 of any one of the above embodiments.

[0136] The above-mentioned HVAC device is connected by the first protrusion 52 and the second protrusion 72 to ensure that the first steel pipe 10 is connected to the second steel pipe 30. The end face of one axial end of the first steel pipe 10 and the end face of one axial end of the second steel pipe 30 have a gap in the axial direction of the fluid pipeline 100. When the first protrusion 52 and the second protrusion 72 are welded, the welding heat between the first transition part 50 and the second transition part 70 is prevented from burning to the first steel pipe 10 and the second steel pipe 30, thereby preventing the first steel pipe 10 and the second steel pipe 30 from overheating and generating cracks, thereby improving the safety of the fluid pipeline 100.

[0137] Specifically, in one embodiment, the HVAC device (not shown) includes but is not limited to wall-mounted air conditioners, window air conditioners, ceiling air conditioners, and cabinet air conditioners.

[0138] It should be noted that the above explanations of the implementation method and beneficial effects of the fluid pipeline 100 are also applicable to the HVAC device of the implementation method of the utility model, and will not be repeated here to avoid redundancy.

[0139] A HVAC device provided in an embodiment of the utility model includes a fluid pipeline 100 of any of the above-mentioned embodiments, an element component, and a refrigerant piping connected to the element component, the inlet piping or outlet piping of the element component is the first steel pipe 10 of the fluid pipeline 100 of any of the above-mentioned embodiments; the refrigerant piping is the second steel pipe 30 of the fluid pipeline 100 of any of the above-mentioned embodiments.

[0140] This makes the connection between the refrigerant pipe and the component parts safer.

[0141] Specifically, in one embodiment, the inlet pipe of the element component is the first steel pipe 10 of the fluid pipeline 100 of any of the above embodiments. In one embodiment, the outlet pipe of the element component is the first steel pipe 10 of the fluid pipeline 100 of any of the above embodiments.

[0142] In certain embodiments, the element component is at least one of a valve body, a gas-liquid separator, a compressor, a filter, an oil separator, and a muffler.

[0143] As a result, the application range of the element components is wider.

[0144] Specifically, in one embodiment, the element component is one of a valve body, a gas-liquid separator, a compressor, a filter, an oil separator, and a muffler. In one embodiment, the element component is any two of the valve body, a gas-liquid separator, a compressor, a filter, an oil separator, and a muffler, or a combination of any three or more of the three.

[0145] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0146] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fluid pipeline, characterized in that: include: First steel pipe; Second steel pipe; A first transition portion, wherein the material of the first transition portion is different from that of the first steel pipe, the first transition portion is connected to the first steel pipe, and a portion of the first transition portion is protruded at one axial end of the first steel pipe to form a first protrusion; A second transition portion, wherein the material of the second transition portion is different from the material of the second steel pipe, the second transition portion is connected to the second steel pipe, and a portion of the second transition portion is protruded at one axial end of the second steel pipe to form a second protrusion; The first protrusion is connected to the second protrusion, and an end surface of one axial end of the first steel pipe and an end surface of one axial end of the second steel pipe have a gap in the axial direction of the fluid pipeline.

2. The fluid pipeline according to claim 1, characterized in that: The first transition portion and the first steel pipe are connected by furnace welding, and / or; The second transition portion and the second steel pipe are connected by furnace welding.

3. The fluid pipeline according to claim 1, characterized in that: The first protrusion and the second protrusion are connected by flame welding.

4. The fluid pipeline according to claim 1, characterized in that: The length range of the first protrusion is [2 mm, 10 mm].

5. The fluid pipeline according to claim 1, characterized in that: The material of the first steel pipe includes carbon steel or stainless steel, and / or; The material of the second steel pipe includes carbon steel or stainless steel.

6. The fluid pipeline according to claim 1, characterized in that: The material of the first transition portion is any one of aluminum, aluminum alloy, copper and copper alloy, and / or; The material of the second transition portion is any one of aluminum, aluminum alloy, copper and copper alloy.

7. The fluid pipeline according to claim 1, characterized in that: The first transition portion is a tubular structure; and / or the second transition portion is a tubular structure.

8. The fluid pipeline according to claim 1, characterized in that: The first transition portion includes a first connection portion connected to the first protrusion, the first connection portion is arranged on at least a portion of the inner periphery of the first steel pipe, the second transition portion includes a second connection portion connected to the second protrusion, the second connection portion is sleeved on at least a portion of the outer periphery of the second steel pipe, a portion of the second transition portion is located in the first transition portion, and another portion protrudes from the first transition portion; The first protrusion and the second steel tube do not overlap in the upward direction of the fluid tube path, or the first protrusion and the second steel tube overlap in the upward direction of the fluid tube path.

9. The fluid pipeline according to claim 8, characterized in that: A length of another portion of the second transition portion protruding from the first transition portion is greater than 5 mm.

10. The fluid pipeline according to claim 1, characterized in that: The first steel pipe includes a first body and a first matching portion, the first matching portion is located at the connection between the first steel pipe and the first transition portion, the diameter of the first matching portion is smaller than the diameter of the first body, or the diameter of the first matching portion is equal to the diameter of the first body, or the diameter of the first matching portion is larger than the diameter of the first body.

11. The fluid pipeline according to claim 1, characterized in that: The second steel pipe includes a second body and a second matching portion, the second matching portion is located at the connection between the second steel pipe and the second transition portion, the diameter of the second matching portion is smaller than the diameter of the second body, or the diameter of the second matching portion is equal to the diameter of the second body, or the diameter of the second matching portion is larger than the diameter of the second body.

12. A HVAC device, characterized in that: A fluid pipeline comprising any one of claims 1-11.

13. A heating and ventilation device, characterized in that: include: The fluid pipeline, element component and refrigerant piping connected to the element component as described in any one of claims 1-11, the inlet piping or outlet piping of the element component is the first steel pipe of the fluid pipeline as described in any one of claims 1-11; the refrigerant piping is the second steel pipe of the fluid pipeline as described in any one of claims 1-11.

14. The HVAC device according to claim 13, characterized in that: The essential components are at least one of a valve body, a gas-liquid separator, a compressor, a filter, an oil separator, and a muffler.

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