A pipe connection structure of a cylinder and a liquid reservoir

Abstract

The application discloses a pipeline connecting structure of a cylinder and a liquid accumulator, which comprises a suction pipeline of the cylinder and an outlet pipeline of the liquid accumulator, one end of the suction pipeline is located in the cylinder, the other end of the suction pipeline is located outside the cylinder, the outlet pipeline comprises a first pipeline and a second pipeline, one end of the second pipeline is used for being communicated with the liquid accumulator, the other end of the second pipeline is provided with an annular connecting part around the outer wall of the port thereof, one end of the first pipeline is inserted into the suction pipeline of the cylinder, the other end of the first pipeline is in sealed communication with the other end of the second pipeline, the first pipeline is located in the suction pipeline and is connected with the suction pipeline in an interference fit, and the end face of the other end of the suction pipeline and the end face of the connecting part are connected through laser welding. The pipeline connecting structure of the cylinder and the liquid accumulator provided by the application solves the problems that the sealing process between the suction port of the cylinder of the cylinder compressor and the pipeline of the liquid accumulator is complex and the sealing effect is poor in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor manufacturing technology, and in particular to a pipeline connection structure between a cylinder and a liquid receiver. Background Technology

[0002] A compressor is a fluid machine that elevates low-pressure gas to high-pressure gas; it is the heart of a refrigeration system. Inside the compressor casing is a cylinder. During operation, low-temperature, low-pressure refrigerant gas enters the cylinder through the inlet pipe. After being compressed, the gas is discharged from the outlet pipe as high-temperature, high-pressure refrigerant gas, providing power for the refrigeration cycle and thus realizing the refrigeration cycle of compression → condensation → expansion → evaporation. Because it cannot be guaranteed that the refrigerant will completely vaporize during the evaporation stage, a liquid receiver is installed between the cylinder and the evaporator to prevent liquid refrigerant from entering the cylinder and causing liquid slugging.

[0003] like Figure 1 As shown, the existing connection and sealing between the cylinder and the reservoir requires an interference fit inserting of a suction pipe into the cylinder's suction port, followed by flame circumferential welding of the suction pipe 1, the housing wall pipe 2 on the outer periphery of the cylinder's suction port, and the reservoir pipe 3. Figure 1 The components are welded together at point A. Because the reservoir assembly is large, it cannot be directly pressed into the cylinder for sealing. Therefore, this assembly process is relatively complex. The sealing effect of the cylinder intake port is not ideal. The heat effect caused by flame welding will lead to changes in the dimensions of the moving parts.

[0004] Therefore, it is necessary to provide a connection structure between the compressor cylinder intake port and the liquid receiver pipeline with better sealing performance. Summary of the Invention

[0005] The purpose of this invention is to provide a pipeline connection structure between a cylinder and a liquid receiver to solve the problem of complex sealing process and poor sealing effect between the cylinder intake port of the cylinder compressor and the liquid receiver pipeline in the prior art.

[0006] To achieve the above objectives, the present invention provides a pipeline connection structure between a cylinder and a liquid reservoir, including an intake pipe for the cylinder and an outlet pipe for the liquid reservoir. One end of the intake pipe is located inside the cylinder, and the other end is located outside the cylinder. The outlet pipe includes a first pipe and a second pipe. One end of the second pipe is used to communicate with the liquid reservoir, and the other end is provided with an annular connecting portion around its port outer wall. One end of the first pipe extends into the intake pipe of the cylinder, and the other end is sealed and communicated with the other end of the second pipe. The first pipe is located in the intake pipe and is interference-fitted with the intake pipe. The end face of the other end of the intake pipe and the end face of the connecting portion are laser-welded.

[0007] Further, the air suction pipeline penetrates a side wall of the cylinder, and comprises an air suction passage in the cylinder and a shell wall pipeline outside the cylinder, one end of the first pipeline extending into the air suction passage; and the end surface of the shell wall pipeline and the end surface of the connecting portion are laser welded.

[0008] Further, the outer diameter of the connecting portion is larger than the outer diameter of the shell wall pipeline.

[0009] Further, the first pipeline and the second pipeline are made of different materials.

[0010] Further, the connecting portion and the second pipeline are made of a material with a thermal conductivity lower than 100 W / mK.

[0011] Further, the connecting portion and the second pipeline are made of iron.

[0012] Further, the first pipeline is made of copper.

[0013] Further, the first pipeline and the second pipeline are integrally formed by using a composite material.

[0014] Further, the length of the part of the first pipeline in interference fit connection with the air suction pipeline is greater than 5 mm.

[0015] Further, the end of the other end of the second pipeline extends outward along the circumference to form the connecting portion.

[0016] In summary, the pipeline connection structure of the cylinder and the liquid accumulator provided by the application eliminates the air suction connecting pipe in the connecting structure in the prior art, reduces the number of parts in the assembly mode, and designs the outlet pipeline into two sections, the first pipeline is pressed into the air suction pipeline in interference fit to ensure the sealing property, and the second pipeline is designed to realize laser welding of the end surface of the other end of the air suction pipeline and the connecting portion, compared with the traditional flame welding, the heat influence caused by welding is reduced, and the thermal deformation of the parts is reduced.

[0017] In addition, the two pipeline sections of the outlet pipeline of the liquid accumulator are made of different materials, the first pipeline is made of a material with good ductility, such as copper, which can better realize interference fit connection, and the second pipeline and the connecting portion are made of a material with low thermal conductivity, such as iron, which can reduce the heat influence of welding during laser welding.

[0018] Moreover, the application further specially provides the connecting portion for realizing laser welding with the end surface of the air suction pipeline, so that the sealing effect of welding is better. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is a partial view of a pipeline connecting structure of a compressor cylinder and a liquid accumulator;

[0020] Figure 2 It is a schematic view of a pipeline connecting structure of a cylinder and a liquid accumulator provided by an embodiment of the present application;

[0021] Figure 3 It is a structural schematic view of an outlet pipeline of a liquid accumulator in a pipeline connecting structure of a cylinder and a liquid accumulator provided by an embodiment of the present application;

[0022] Figure 4 It is a structural schematic view of an outlet pipeline of a liquid accumulator and a liquid accumulator after assembly in a pipeline connecting structure of a cylinder and a liquid accumulator provided by an embodiment of the present application.

[0023] In the drawings, the reference signs are explained as follows:

[0024] 1 - suction pipe; 2 - shell wall pipeline; 3 - liquid accumulator pipeline; A - welding position;

[0025] 10 - suction pipeline; 20 - outlet pipeline; 11 - suction passage; 12 - shell wall pipeline; 21 - first pipeline; 22 - second pipeline; 23 - connecting part. DETAILED DESCRIPTION

[0026] The pipeline connecting structure of a cylinder and a liquid accumulator provided by the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that the drawings are very simplified and use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0029] Figure 2 The pipeline connecting structure of a cylinder and a liquid accumulator provided by the present application, Figure 3The structural schematic view of the outlet pipeline of the liquid accumulator in the pipeline connecting structure of the gas cylinder and the liquid accumulator provided by an embodiment of the application is shown in the figure. Figure 4 The structural schematic view of the outlet pipeline of the liquid accumulator and the liquid accumulator after assembly in the pipeline connecting structure of the gas cylinder and the liquid accumulator provided by an embodiment of the application is shown in the figure. Figures 2 to 4 The connecting structure mainly comprises the gas suction pipeline 10 of the gas cylinder and the outlet pipeline 20 of the liquid accumulator, one end of the gas suction pipeline 10 is located in the gas cylinder, the other end is located outside the gas cylinder, the outlet pipeline 20 comprises a first pipeline 21 and a second pipeline 22, one end of the second pipeline 22 is used to communicate with the liquid accumulator, the other end is provided with a connecting part 23 in the form of a ring around the outer wall of the port, one end of the first pipeline 21 extends into the gas suction pipeline 10, the other end is in sealed communication with the other end of the second pipeline 22, the first pipeline 21 is located in the gas suction pipeline 10 and is connected with the gas suction pipeline 10 in the form of interference fit, and the end face of the other end of the gas suction pipeline 10 and the end face of the connecting part 23 are sealed by laser welding. In this embodiment, the gas suction connecting pipe in the connecting structure in the prior art is omitted, the number of parts in the assembly mode is reduced, the outlet pipeline is designed in two sections, the first pipeline is used to press into the gas suction pipeline in the form of interference fit to ensure the sealing property, and the connecting part of the second pipeline and the end face of the other end of the gas suction pipeline are laser welded, compared with the traditional flame welding, the heat influence caused by welding is reduced, and the thermal deformation of the parts is reduced.

[0030] Further, the gas suction pipeline 10 penetrates through one side wall of the gas cylinder, and comprises a gas suction passage 11 located in the gas cylinder and a housing wall pipeline 12 located outside the gas cylinder, one end of the first pipeline 21 extends into the gas suction passage 11, and the end face of the housing wall pipeline 12 and the end face of the connecting part 23 are laser welded. More preferably, the outer diameter of the connecting part 23 is greater than the outer diameter of the housing wall pipeline 12. In this way, when the first pipeline 21 is inserted into the gas suction pipeline 10 for assembly, the connecting part 23 can play a guiding and positioning role, and when the end face of the connecting part 23 and the end face of the housing wall pipeline 12 are sealed and welded, the area of the welded connecting surface is increased, and the sealing effect is improved.

[0031] Further, the first pipe 21 and the second pipe 22 are made of different materials. Preferably, the connecting part 23 and the second pipe 22 are made of a material with a thermal conductivity lower than 100 W / mK, for example, iron; and the first pipe 21 is made of copper. Since the two sections of the outlet pipe 20 of the liquid accumulator are respectively used to realize press-in interference fit into the suction pipe 10 and to realize end face welding sealing with the suction pipe 10, different materials can be used to realize respective functions, for example, the first pipe 21 made of copper with good ductility can better realize press-in interference fit, and the second pipe 22 and the connecting part 23 made of a material with low thermal conductivity, for example, iron, can reduce the heat affected zone during laser welding.

[0032] Preferably, the first pipe 21 and the second pipe 22 can be integrally formed by using a composite material. The advantage of integral forming is that the sealing effect between the pipes can be optimized.

[0033] Further, in order to ensure the sealing effect of the press-in interference fit of the first pipe 21 into the suction pipe 10, the length of the part of the first pipe 21 that is press-in interference fit connected with the suction pipe 10 is greater than 5 mm.

[0034] As an implementation manner of the embodiment, the end of the other end of the second pipe 22 is outwardly extended along the circumference to form the connecting part 23. Of course, those skilled in the art can understand that the connecting part 23 can be formed in other ways in addition to the above-mentioned way, for example, a circular ring is welded around the outer wall of the end of the other end of the second pipe 22 to form the connecting part 23, and the shape of the connecting part is not limited to a circular ring, but can also be other annular structures, for example, an annular structure with a polygonal cross section similar to a nut. Further, the wall thickness of the second pipe 22 is greater than 1 mm to ensure the welding effect of the laser circumferential welding; in addition, in addition to laser welding, fillet welding or other ways can be used to weld between the end face of the connecting part 23 and the pipe wall of the shell wall pipe 12 to improve the welding sealing effect.

[0035] The pipe connection structure of the cylinder of the compressor and the liquid accumulator can be applied to a fully-enclosed rotor compressor, and can also be applied to other types of compressors, for example, a scroll compressor.

[0036] In summary, the pipeline connecting structure of the cylinder and the liquid accumulator provided by the application omits the air suction connecting pipe in the connecting structure in the prior art, reduces the number of parts in the assembly mode, and designs the outlet pipeline into two sections. The first pipeline is used to press into the air suction pipeline in the interference fit mode to ensure the sealing property, and the second pipeline is designed to realize laser welding between the connecting part and the end face of the other end of the air suction pipeline. Compared with the traditional flame welding, the laser welding reduces the heat influence caused by the welding and reduces the part thermal deformation.

[0037] In addition, the two pipeline sections of the outlet pipeline of the liquid accumulator are prepared by using different materials. The first pipeline is prepared by using a material with good ductility, such as copper, which can better realize the interference fit connection. The second pipeline and the connecting part are prepared by using a material with low thermal conductivity, such as iron, which can reduce the heat influence caused by the welding during the laser welding.

[0038] Furthermore, the application is specially provided with the connecting part to realize the laser welding with the end face of the air suction pipeline, so that the sealing effect of the welding is better.

[0039] The above is only the preferred embodiment of the application, and does not limit the application. Any person skilled in the art can make any equivalent replacement, modification or change to the technical scheme and technical content disclosed by the application without departing from the scope of the technical scheme of the application, which still belongs to the protection scope of the application.

Claims

1. A pipe connection structure between a cylinder and a liquid reservoir, characterized in that, The outlet pipeline of the suction pipeline of the cylinder and the liquid reservoir, one end of the suction pipeline is located in the cylinder, the other end is located outside the cylinder, the outlet pipeline includes a first pipeline and a second pipeline; One end of the second pipeline is used for communication with the liquid reservoir, and the other end of the second pipeline is provided with an annular connecting portion around the outer wall of the port; One end of the first pipeline extends into the suction pipeline of the cylinder, and the other end of the first pipeline is in sealed communication with the other end of the second pipeline; The first pipeline is located in the suction pipeline and is connected with the suction pipeline in an interference fit, and the end face of the other end of the suction pipeline and the end face of the connecting portion are laser welded; The suction pipeline penetrates through one side wall of the cylinder, and includes a suction passage located in the cylinder and a shell wall pipeline located outside the cylinder, one end of the first pipeline extends into the suction passage, and the end face of the shell wall pipeline and the end face of the connecting portion are laser welded; The first pipeline and the second pipeline are made of different materials.

2. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, characterized by The outer diameter of the connecting portion is greater than the outer diameter of the shell wall pipeline.

3. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, characterized by The connecting portion and the second pipeline are made of a material with a thermal conductivity lower than 100 W / mK.

4. The pipe connection structure of a cylinder and a liquid accumulator according to claim 3, characterized by The connecting portion and the second pipeline are made of iron.

5. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, wherein The first pipeline is made of copper.

6. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, wherein The first pipeline and the second pipeline are integrally formed by a composite material.

7. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, wherein The length of the portion of the first pipeline connected with the suction pipeline in an interference fit is greater than 5 mm.

8. The pipe connection structure of a cylinder and a liquid accumulator according to claim 1, wherein The end portion of the other end of the second pipeline extends outward along the circumference to form the connecting portion.

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