Rotary compressor

Abstract

The utility model provides a rotary compressor, and relates to the technical field of compressors. The rotary compressor comprises a compressor shell, an air cylinder and a liquid storage device, the air cylinder is arranged in the compressor shell, an air suction hole is formed in the air cylinder, a bent pipe is arranged on the liquid storage device, a first connecting part is arranged on the outer side wall of the bent pipe in a protruding mode, and part of the side wall of the compressor shell protrudes outwards to form a second connecting part; the first connecting part and the second connecting part are welded, a through hole is formed in the second connecting part, and the bent pipe penetrates through the through hole and then extends into the air suction hole, so that the number of parts is reduced, the complexity of assembling and welding processes is reduced, the problem of refrigerant leakage caused by multiple assembling parts and complex welding procedures is solved, and the service life of the compressor is prolonged. And the performance of the compressor is improved while the welding quality and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more specifically, to a rotary compressor. Background Technology

[0002] Rotary compressors are a common type of compressor, widely used in refrigeration equipment such as air conditioners and refrigerators.

[0003] A rotary compressor typically includes a compressor housing, a motor, an intake connection pipe, a housing seat ring, a cylinder, and a liquid receiver. The bend in the liquid receiver is welded to the intake connection pipe, which in turn connects to the intake port of the cylinder. Furthermore, the intake connection pipe is welded to the compressor housing via the housing seat ring. As a whole, there are many parts, and the welding process is quite complex. Utility Model Content

[0004] The purpose of this application includes, for example, providing a rotary compressor that reduces the number of workpieces and lowers the complexity of the welding process.

[0005] The embodiments of this application can be implemented as follows:

[0006] An embodiment of this application provides a rotary compressor, which includes a compressor housing, a cylinder, and a liquid receiver. The cylinder is disposed inside the compressor housing and has an air intake hole. The liquid receiver has a bent pipe with a first connecting portion protruding from its outer side wall. A portion of the side wall of the compressor housing protrudes outward to form a second connecting portion. The first connecting portion is welded to the second connecting portion. The second connecting portion has a through hole, and the bent pipe extends into the air intake hole after passing through the through hole.

[0007] Optionally, a sealing groove is provided on the wall of the bend and / or the air intake, and a sealing element is provided in the sealing groove.

[0008] Optionally, the sealing element is a sealing ring, and the sealing groove is an annular groove.

[0009] Optionally, the first connecting part is a protrusion provided on the surface of the tube body of the bent pipe, and the radial dimension of the first connecting part covers the diameter of the through hole, and the diameter of the through hole is larger than the diameter of the air intake hole.

[0010] Optionally, the surface of the second connecting portion away from the cylinder covers and matches the surface of the first connecting portion facing the second connecting portion, and the first connecting portion abuts against the second connecting portion and is welded.

[0011] Optionally, the bend includes a first straight pipe section, a second straight pipe section, and a curved pipe section connecting the first straight pipe section and the second straight pipe section, wherein the second straight pipe section is coaxial with the air intake hole, and the first connecting part is disposed on the second straight pipe section.

[0012] Optionally, the second connecting portion corresponds to the position of the air intake hole, the surface of the second connecting portion away from the cylinder is perpendicular to the axis of the air intake hole, and the surface of the first connecting portion facing the second connecting portion is perpendicular to the axis of the second straight pipe section.

[0013] Optionally, the end of the air intake facing the compressor housing is provided with a chamfered guide opening.

[0014] Optionally, the port of the bent tube placed inside the air intake hole has an inwardly tapered outer diameter.

[0015] Optionally, along the axial direction of the air intake hole, the bent pipe and / or the hole wall of the air intake hole are provided with multiple sealing grooves, and multiple sealing elements are provided between the bent pipe and the hole wall of the air intake hole.

[0016] The beneficial effects of the rotary compressor provided in this application include, for example, to avoid leakage at the suction port of the cylinder, a rotary compressor is designed, which includes a compressor housing, a cylinder and a liquid receiver. The cylinder is disposed inside the compressor housing and has a suction port. A bent pipe is disposed on the liquid receiver. A first connecting part is protruding from the outer side wall of the bent pipe. A part of the side wall of the compressor housing protrudes outward to form a second connecting part. The first connecting part is welded to the second connecting part. A through hole is opened on the second connecting part, and the bent pipe passes through the through hole and extends into the suction port.

[0017] By providing a first connecting part on the outer side wall of the bend, and forming a second connecting part by protruding part of the side wall of the compressor housing, and welding the first connecting part to the second connecting part, the welding process between the liquid receiver and the compressor housing is completed. Since the intake connecting pipe is eliminated, the number of parts and welding times is reduced, thereby reducing the complexity of the assembly and welding process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a rotary compressor in the prior art;

[0020] Figure 2 This is a schematic diagram of a rotary compressor in an embodiment of this application.

[0021] Icons: 100-Compressor housing; 110-Through hole; 120-Second connection; 200-Cylinder; 210-Suction port; 220-Sealing groove; 230-Guide opening; 300-Bend; 310-First straight pipe section; 320-Second straight pipe section; 321-First connection; 330-Bend pipe section; 400-Seal. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0027] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0028] As disclosed in the background section, in existing rotary compressors, such as Figure 1As shown, the bent pipe 1 on the liquid receiver is welded to the intake connecting pipe 2. The intake connecting pipe 2 then extends into the suction port of the cylinder 3 and communicates with the suction port. The fit between the intake connecting pipe 2 and the suction port of the cylinder 3 is an interference fit. Under high pressure, a small amount of leakage occurs at the fit between the intake connecting pipe 2 and the suction port, affecting the overall performance of the compressor. In addition, the intake connecting pipe 2 also needs to be welded to the housing ring 4, and the housing ring 4 is then welded to the compressor housing 5. There are many parts, and multiple welding processes are required, making the process relatively complex. The embodiments of this application provide a rotary compressor, which at least solves the above-mentioned technical problems.

[0029] Please refer to Figure 2 The rotary compressor provided in the embodiments of this application includes a compressor housing 100, a cylinder 200 and a liquid receiver. The cylinder 200 is disposed inside the compressor housing 100 and has an air intake hole 210. The liquid receiver is provided with a bent pipe 300. A first connecting part 321 protrudes from the outer side wall of the bent pipe 300. A portion of the side wall of the compressor housing 100 protrudes outward to form a second connecting part 120. A through hole 110 is provided on the second connecting part 120. The first connecting part 321 is welded to the second connecting part 120. The bent pipe 300 passes through the through hole 110 and extends into the air intake hole 210.

[0030] The first connecting part 321 is located on the outside of the compressor housing 100. The first connecting part 321 is protruding from the outer wall of the bent pipe 300, and the first connecting part 321 is welded to the second connecting part 120, thereby fixing the bent pipe 300 to the compressor housing 100.

[0031] The liquid reservoir is fixedly connected to the compressor housing 100 by a bracket or the like. The axis of the through hole 110 coincides with the axis of the suction hole 210. The bent pipe 300 passes through the through hole 110 and the suction hole 210 in sequence.

[0032] By providing a first connecting part 321 on the outer side wall of the bend 300, and forming a second connecting part 120 by protruding a portion of the side wall of the compressor housing 100, and welding the first connecting part 321 to the second connecting part 120, the welding process between the liquid receiver and the compressor housing 100 is completed. Since the intake connecting pipe is eliminated, the number of parts and welding times is reduced, thereby reducing the complexity of the welding process.

[0033] In this embodiment, a sealing groove 220 is provided on the wall of the bend 300 and / or the suction hole 210, and a sealing element 400 is provided in the sealing groove 220.

[0034] A sealing groove 220 is provided on the wall of the bend 300 and / or the suction port 210. That is, the bend 300 is provided with a sealing groove 220, or the wall of the suction port 210 is provided with a sealing groove 220, or both the bend 300 and the suction port 210 are provided with sealing grooves 220. Regardless of whether the sealing groove 220 is provided on the wall of the bend 300 and / or the suction port 210, the sealing element 400 is provided in the sealing groove 220 to seal the suction port 210.

[0035] It should be noted that when both the bend 300 and the suction port 210 have sealing grooves 220 on their walls, the sealing grooves 220 on the bend 300 and the sealing grooves 220 on the suction port 210 are aligned so that the seal 400 can be simultaneously accommodated in both the sealing grooves 220 on the bend 300 and the sealing grooves 220 on the suction port 210.

[0036] Since the second connecting part 120 is formed by the outward protrusion of part of the side wall of the compressor housing 100, the distance between the compressor housing 100 and the seal 400 is increased at the position of the second connecting part 120. When the first connecting part 321 is welded to the second connecting part 120, the high temperature generated during welding is less likely to affect the seal 400.

[0037] In some embodiments, the seal 400 is a sealing ring, and the sealing groove 220 is an annular groove.

[0038] In an optional embodiment, the sealing groove 220 is formed on the wall of the air intake hole 210. The sealing groove 220 is formed in a circle along the wall of the air intake hole 210, forming an annular groove, and the sealing ring is disposed in the annular groove, which can play a good sealing role.

[0039] In another optional embodiment, the sealing groove 220 can also be formed by opening a ring around the outer side wall of the bend 300 to form an annular groove, and the sealing ring is disposed in the annular groove, which can also play a good sealing role.

[0040] In other optional embodiments, the sealing groove 220 may also be opened at corresponding positions along the hole wall of the air intake 210 and the outer side wall of the bend 300 to form annular grooves, and the sealing ring is disposed between the two annular grooves, so that the sealing assembly after the sealing ring is assembled in the corresponding annular grooves provided on the hole wall of the air intake 210 and the outer side wall of the bend 300 plays the same sealing role as in the above embodiments.

[0041] In an optional embodiment, along the axial direction of the suction hole 210, a plurality of sealing grooves 220 are provided on the wall of the bend 300 and / or the suction hole 210, and a plurality of sealing elements 400 are provided between the bend 300 and the wall of the suction hole 210.

[0042] Multiple sealing elements 400 can be provided between the wall of the bend 300 and the suction port 210. These multiple sealing elements 400 are spaced apart along the axial direction of the suction port 210. Correspondingly, there are also multiple sealing grooves 220 on the wall of the bend 300 and / or the suction port 210. Each sealing element 400 is provided in the corresponding sealing groove 220, thereby further improving the sealing effect.

[0043] For example, there are three seals 400, and correspondingly, there are also three sealing grooves 220 on the wall of the bend 300 and / or the suction port 210, with the three seals 400 being disposed in the three sealing grooves 220 in a one-to-one correspondence.

[0044] Understandably, the number of seals 400 and the number of sealing grooves 220 can be determined according to the actual working conditions. For example, if the sealing effect of a single seal 400 is generally poor, the number of seals 400 can be increased. However, if a single seal 400 can achieve a good sealing effect, there is no need to increase the number of seals 400.

[0045] In an optional embodiment, the first connecting part 321 is a protrusion provided on the surface of the tube body of the bend 300, and the radial dimension of the first connecting part 321 covers the diameter of the through hole 110, and the diameter of the through hole 110 is larger than the diameter of the air intake hole 210.

[0046] The first connecting part 321 is arranged around the bend 300. The first connecting part 321 can be formed by bending part of the tube surface of the bend 300. By protruding the first connecting part 321 on the tube surface of the bend 300, the radial dimension of the first connecting part 321 covers the diameter of the through hole 110, so that the first connecting part 321 is easy to weld to the compressor housing 100.

[0047] In other alternative embodiments, the first connecting portion 321 is formed on the surface of the tube body of the bend 300 by additive manufacturing. The first connecting portion 321 can also protrude outward from the surface of the tube body of the bend 300 so as to be welded to the compressor housing 100.

[0048] In some embodiments, the surface of the second connecting portion 120 away from the cylinder 200 covers and matches the surface of the first connecting portion 321 facing the second connecting portion 120, and the first connecting portion 321 abuts against the second connecting portion 120 and is welded.

[0049] Along the radial direction of the first connecting portion 321, the surface of the second connecting portion 120 away from the cylinder 200 covers the surface of the first connecting portion 321 facing the second connecting portion 120, and the curvature of the surface of the second connecting portion 120 away from the cylinder 200 matches the curvature of the surface of the first connecting portion 321 facing the second connecting portion 120. The first connecting portion 321 can completely fit against the second connecting portion 120 and cover the through hole 110, thereby achieving stable welding between the first connecting portion 321 and the second connecting portion 120.

[0050] In this embodiment, the bend 300 includes a first straight pipe section 310, a second straight pipe section 320, and a bend pipe section 330 connected between the first straight pipe section 310 and the second straight pipe section 320. The second straight pipe section 320 is coaxial with the air intake 210, and the first connecting part 321 is disposed on the second straight pipe section 320.

[0051] The first straight pipe section 310, the second straight pipe section 320, and the curved pipe section 330 are integrally formed. The first straight pipe section 310 is connected to the liquid reservoir. The first connecting part 321 protrudes from the pipe body surface of the second straight pipe section 320. The second straight pipe section 320 extends into the suction hole 210 after passing through the through hole 110. The second straight pipe section 320 and the suction hole 210 are coaxial.

[0052] The second connecting part 120 corresponds to the position of the air intake 210. The surface of the second connecting part 120 away from the cylinder 200 is perpendicular to the axis of the air intake 210. The surface of the first connecting part 321 facing the second connecting part 120 is perpendicular to the axis of the second straight pipe section 320.

[0053] Since part of the side wall of the compressor housing 100 protrudes outward to form the second connecting part 120, the surface of the second connecting part 120 away from the cylinder 200 can be flat. The first connecting part 321 is welded to the surface of the second connecting part 120 away from the cylinder 200, which improves the stability of the weld and increases the distance between the weld and the sealing ring. Therefore, the high temperature generated during welding is less likely to affect the sealing ring.

[0054] In this embodiment, the surface of the second connecting part 120 away from the cylinder 200 and the first connecting part 321 can be welded by high-frequency brazing or laser brazing.

[0055] It should be noted that high-frequency brazing refers to heating the weld seam to the melting temperature of the alloy filler metal. At this point, the metals being welded have not yet reached their melting temperature. The low-melting-point alloy binds the two metals together through strong surface tension, forming a solid weld seam upon cooling. Laser brazing, on the other hand, uses the high energy density of a laser to rapidly heat and melt the filler metal in a localized area.

[0056] It is understood that in other embodiments, the surface of the second connecting portion 120 away from the cylinder 200 and the first connecting portion 321 may also adopt other welding methods, which are not limited thereto.

[0057] In some embodiments, the intake port 210 has a chamfered guide opening 230 at one end facing the compressor housing 100.

[0058] It should be noted that the diameter of the guide opening 230 gradually increases along the axis of the suction hole 210 and in the direction towards the outside of the suction hole 210, forming a chamfered opening on the side of the suction hole 210 facing the through hole 110, thereby facilitating the second straight pipe section 320 to extend into the suction hole 210 and playing a guiding role for the second straight pipe section 320.

[0059] In some embodiments, the port of the bend 300 located within the air intake 210 has an inwardly tapered outer diameter.

[0060] It should be noted that, along the axis of the suction hole 210 and in the direction towards the inside of the suction hole 210, the outer diameter of the port of the second straight pipe section 320 placed inside the suction hole 210 gradually decreases, which plays a guiding role and makes the process of the second straight pipe section 320 entering the suction hole 210 easier.

[0061] The beneficial effects of the rotary compressor provided in this application embodiment include at least the following: by passing the bent pipe 300 on the liquid receiver through the through hole 110 and directly extending it into the suction hole 210, and by setting a seal 400 between the bent pipe 300 and the hole wall of the suction hole 210, the suction hole 210 of the cylinder 200 is sealed, which can effectively prevent leakage at the suction hole 210 of the cylinder 200 and improve the overall performance of the compressor; since the intake connecting pipe is eliminated, the number of parts and welding times are reduced, thereby reducing the complexity of the welding process; the sealing fit between the bent pipe 300 and the hole wall of the suction hole 210 by the sealing ring reduces the noise of the compressor to a certain extent.

[0062] In summary, this application provides a rotary compressor comprising a compressor housing 100, a cylinder 200, and a liquid receiver. A first connecting portion 321 protrudes from the outer wall of the bend 300, and a second connecting portion 120 protrudes from a portion of the side wall of the compressor housing 100. The first connecting portion 321 and the second connecting portion 120 are welded together, thus completing the welding process between the liquid receiver and the compressor housing 100. By eliminating the intake connecting pipe, the number of parts and welding operations is reduced, thereby reducing the complexity of the assembly and welding process. This solves the refrigerant leakage problem caused by numerous assembly parts and complex welding processes, improving the quality and efficiency of welding while enhancing the performance of the compressor.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotary compressor characterized by comprising: The compressor shell (100), the cylinder (200) and the liquid reservoir, the cylinder (200) is arranged in the compressor shell (100), the cylinder (200) is provided with suction hole (210), the liquid reservoir is provided with elbow pipe (300); The outer side wall of the elbow pipe (300) is provided with a first connecting part (321), and the part of the side wall of the compressor shell (100) is outwardly protruded to form a second connecting part (120), and the first connecting part (321) is welded with the second connecting part (120). The second connecting part (120) is provided with a through hole (110), and the elbow pipe (300) extends into the suction hole (210) after passing through the through hole (110).

2. The rotary compressor of claim 1, wherein The hole wall of the elbow pipe (300) and / or the suction hole (210) is provided with a sealing groove (220), and the sealing groove (220) is provided with a sealing element (400).

3. The rotary compressor of claim 2, wherein, The sealing element (400) is a sealing ring, and the sealing groove (220) is an annular groove.

4. The rotary compressor of claim 1, wherein The first connecting part (321) is a protruding part provided on the surface of the pipe body of the elbow pipe (300), the radial dimension of the first connecting part (321) covers the diameter of the through hole (110), and the hole diameter of the through hole (110) is greater than the hole diameter of the suction hole (210).

5. The rotary compressor of claim 1, wherein The surface of the second connecting part (120) away from the cylinder (200) covers and matches the surface of the first connecting part (321) toward the second connecting part (120), and the first connecting part (321) abuts against the second connecting part (120) and is welded.

6. The rotary compressor of claim 1, wherein The elbow pipe (300) comprises a first straight pipe section (310), a second straight pipe section (320) and a curved pipe section (330) connected between the first straight pipe section (310) and the second straight pipe section (320), the second straight pipe section (320) is coaxial with the suction hole (210), and the first connecting part (321) is arranged on the second straight pipe section (320).

7. The rotary compressor of claim 6, wherein The second connecting part (120) corresponds to the position of the suction hole (210), the surface of the second connecting part (120) away from the cylinder (200) is perpendicular to the axis of the suction hole (210), and the surface of the first connecting part (321) toward the second connecting part (120) is perpendicular to the axis of the second straight pipe section (320).

8. The rotary compressor of claim 1, wherein The suction hole (210) is provided with a chamfered guide opening (230) at one end toward the compressor shell (100).

9. The rotary compressor of claim 1, wherein The port of the elbow pipe (300) placed in the suction hole (210) is of an inner diameter retracted shape.

10. The rotary compressor of claim 1, wherein Along the axial direction of the suction hole (210), a plurality of sealing grooves (220) are arranged on the hole wall of the elbow pipe (300) and / or the suction hole (210), and a plurality of sealing elements (400) are arranged between the hole wall of the elbow pipe (300) and the suction hole (210).

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