Compressor with an equalizing oil pipe

Abstract

The present invention provides a compressor with an oil equalizing pipe, comprising: a housing, a cylinder, a liquid reservoir, an intake connection pipe, an exhaust pipe, a seat ring and an oil equalizing pipe; an opening is provided on the side wall of the housing, the opening corresponding to the suction hole of the cylinder, the seat ring is arranged in the opening and fixedly connected to the housing, the intake connection pipe is inserted into the copper pipe of the seat ring, and the liquid reservoir is communicated with the suction hole of the cylinder through the intake connection pipe; wherein, a through hole is opened on the pipe wall of the copper pipe, the edge of the through hole has a flanging structure, the bottom end of the oil equalizing pipe is inserted into the flanging structure and communicated with the copper pipe, and the top end of the oil equalizing pipe is communicated with the exhaust pipe. In the compressor with an oil equalizing pipe provided in the present application, by lengthening the copper pipe of the seat ring structure and opening a through hole and arranging a flanging structure in the lengthened part, the connection and fixation of the oil equalizing pipe are realized, which can not only reduce the manufacturing cost, but also fix the oil equalizing pipe between the liquid reservoir and the housing, thereby reducing the space occupied by the oil equalizing pipe and avoiding its damage.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and particularly to a compressor with an oil equalizing pipe. Background Art

[0002] A compressor is a fluid machine that raises low-pressure gas to high-pressure gas and is the heart of a refrigeration system. Connecting compressors in parallel in a refrigeration system has the advantages of convenient capacity adjustment, easy single-unit shutdown for maintenance, and low cost. However, due to differences in compressor manufacturing or different operating or shutdown states of different compressors, the oil supply or oil return distribution among the compressors is uneven. After operation, the oil volume of some compressors increases while that of others decreases. The compressor with too little oil is likely to be damaged due to insufficient lubrication. Therefore, an oil balance design is required when compressors are connected in parallel.

[0003] Currently, the common practice for oil balance is to connect the oil pools of two compressors with an oil balance pipe (i.e., an oil equalizing pipe). Specifically, an additional seat ring needs to be added to the shell of the compressor, and an additional bracket needs to be added above. The oil equalizing pipe is connected or fixed to the oil pool in the shell through the welded seat ring and the bracket.

[0004] Obviously, the existing connection and fixing method requires adding two additional components, increasing the manufacturing cost. Moreover, since the oil equalizing pipe itself is exposed outside the compressor, it not only occupies a large space but is also easily deformed by force and even damaged seriously in severe cases. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a compressor with an oil equalizing pipe, which overcomes the difficulties of the prior art, can fix the oil equalizing pipe between the liquid receiver and the shell of the compressor without adding components, not only occupies a small space, is not easily damaged, but also has a manufacturing cost.

[0006] According to one aspect of the present invention, there is provided a compressor with an oil equalizing pipe, which includes: a shell, a cylinder, a liquid receiver, an intake connection pipe, an exhaust pipe, a seat ring, and an oil equalizing pipe;

[0007] The cylinder is arranged in the shell, a suction hole is arranged on the cylinder, an opening is arranged on the side wall of the shell, the opening corresponds to the suction hole of the cylinder, the seat ring is arranged in the opening and fixedly connected to the shell, the seat ring has a copper pipe, the intake connection pipe is inserted into the copper pipe, the liquid receiver is arranged outside the shell and connected to the intake connection pipe, and the liquid receiver is communicated with the suction hole of the cylinder through the intake connection pipe;

[0008] Wherein, a through hole is formed in the tube wall of the copper tube, and a flanging structure is provided at the edge of the through hole. The flanging structure faces the outside of the copper tube. The bottom end of the oil equalizing pipe is inserted into the flanging structure and communicated with the copper tube, and the top end of the oil equalizing pipe is communicated with the exhaust pipe.

[0009] Optionally, in the compressor with an oil equalizing pipe, the outer wall of the oil equalizing pipe is mutually attached to the inner wall of the flanging structure, and the oil equalizing pipe is fixedly connected to the flanging structure.

[0010] Optionally, in the compressor with an oil equalizing pipe, the inner diameter of the flanging structure is consistent, and the inner diameter of the flanging structure is equal to the diameter of the through hole; or

[0011] The inner diameter of the flanging structure gradually increases from bottom to top, and the minimum inner diameter of the flanging structure is equal to the diameter of the through hole.

[0012] Optionally, in the compressor with an oil equalizing pipe, the axial direction of the flanging structure is consistent with the axial direction of the oil equalizing pipe.

[0013] Optionally, in the compressor with an oil equalizing pipe, the axial direction of the flanging structure is perpendicular to the axial direction of the copper tube.

[0014] Optionally, in the compressor with an oil equalizing pipe, the flanging structure and the copper tube are integrally formed.

[0015] Optionally, in the compressor with an oil equalizing pipe, a preset distance is maintained between the bottom end of the oil equalizing pipe and the intake connection pipe.

[0016] Optionally, in the compressor with an oil equalizing pipe, it further includes a liquid receiver bracket. The liquid receiver bracket has a bent connecting piece. The bent connecting piece includes a vertical part and a horizontal part. The vertical part is fixedly connected to the housing. A limiting hole is formed in the horizontal part, and the oil equalizing pipe is inserted into the limiting hole.

[0017] Optionally, in the compressor with an oil equalizing pipe, it further includes a rubber sleeve. The rubber sleeve has a central through hole, and the central through hole is coaxially arranged with the limiting hole;

[0018] The rubber sleeve is sleeved in the limiting hole, the oil equalizing pipe is inserted into the central through hole of the rubber sleeve, and the inner wall of the rubber sleeve is mutually attached to the outer wall surface of the oil equalizing pipe.

[0019] Optionally, in the compressor with an oil equalizing pipe, the compressor is a rotary compressor.

[0020] In the compressor with an equalizing oil pipe provided by the present invention, by lengthening the copper pipe of the seat ring structure, opening a through hole in the lengthened part and setting a flanging structure, the connection and fixation of the equalizing oil pipe are realized. This not only can reduce the manufacturing cost, but also can fix the equalizing oil pipe between the liquid receiver and the housing, thereby reducing the space occupied by the equalizing oil pipe and avoiding its damage. Description of the Drawings

[0021] The technical solutions of the present invention will be described in detail below in conjunction with the drawings and specific embodiments, so that the characteristics and advantages of the present invention are more obvious.

[0022] Figure 1 is a schematic structural diagram of a compressor with an equalizing oil pipe according to an embodiment of the present invention;

[0023] Figure 2 is Figure 1 an enlarged schematic view of area A in

[0024] Figure 3 is Figure 1 an enlarged schematic view of area B in

[0025] Figure 4 is a sectional view of a rubber sleeve according to an embodiment of the present invention;

[0026] Figure 5 is a top view of a rubber sleeve according to an embodiment of the present invention. Detailed Description of the Embodiments

[0027] The embodiments of the present invention will be described in detail below. Although the present invention will be described and illustrated in conjunction with some specific embodiments, it should be noted that the present invention is not limited to these embodiments only. On the contrary, any modifications or equivalent replacements made to the present invention should be covered within the scope of the claims of the present invention.

[0028] In addition, for better illustration of the present invention, numerous specific details are given in the following detailed description of the embodiments. Those skilled in the art will understand that the present invention can be implemented without these specific details. In other instances, well-known structures and components are not described in detail to highlight the gist of the present invention.

[0029] The technical solutions of the present invention will be described in detail below in conjunction with the drawings and specific embodiments, so that the characteristics and advantages of the present invention are more obvious.

[0030] Please refer to Figures 1 to 3 , which is a schematic structural diagram of a compressor with an equalizing oil pipe according to an embodiment of the present invention. As Figures 1 to 3As shown in the figure, the compressor 100 with an oil equalizing pipe includes: a housing 1, a cylinder 2, a liquid reservoir 3, an intake connection pipe 4, an exhaust pipe 5, a seat ring 6, and an oil equalizing pipe 7; the cylinder 2 is arranged inside the housing 1, an opening is provided on the side wall of the housing 1, the opening corresponds to the suction hole of the cylinder 2 (not shown in the figure), the seat ring 6 is arranged in the opening and fixedly connected to the housing 1, the seat ring 6 has a copper pipe 61, the intake connection pipe 4 is arranged in the copper pipe 61, the liquid reservoir 3 is arranged outside the housing 1 and connected to the intake connection pipe 4, and the liquid reservoir 3 is communicated with the suction hole of the cylinder 2 through the intake connection pipe 4; wherein, a through hole is opened on the pipe wall of the copper pipe 61, the edge of the through hole has a flanging structure 62, the flanging structure 62 faces the outside of the copper pipe 61, the bottom end of the oil equalizing pipe 7 is inserted into the flanging structure 62 and communicated with the copper pipe 61, and the top end of the oil equalizing pipe 7 is communicated with the exhaust pipe 5.

[0031] Specifically, the compressor 100 includes a housing 1, a cylinder 2, a liquid reservoir 3, an intake connection pipe 4, and an exhaust pipe 5. Among them, the exhaust pipe 5 is arranged at the upper end of the housing 1, the liquid reservoir 3 is arranged outside the housing 1, and the cylinder 2 is arranged inside the housing 1. The cylinder 2 has a suction hole (not shown in the figure), and the suction hole is communicated with the liquid reservoir 3. One end of the intake connection pipe 4 is inserted into the suction hole, the other end of the intake connection pipe 4 is connected to the liquid reservoir 3, and the liquid reservoir 3 is communicated with the suction hole of the cylinder 2 through the intake connection pipe 4.

[0032] Preferably, the cross-sectional shape of the intake connection pipe 4 matches the cross-sectional shape of the suction hole. Further, the cross-sectional shapes of the suction hole and the intake connection pipe 4 are both circular. In this way, the manufacturing process can be simplified and the connection reliability can be improved.

[0033] Please continue to refer to Figure 2 , an opening is provided on the side wall of the housing 1, the opening corresponds to the suction hole of the cylinder 2, the seat ring 6 is arranged in the opening and fixedly connected to the housing 1, the seat ring 6 includes a copper pipe 61 and a base (not labeled in the figure), preferably the copper pipe 61 is located at the center of the base, the length direction (i.e., the axial direction) of the copper pipe 61 is consistent with the length direction (i.e., the axial direction) of the intake connection pipe 4, and preferably the copper pipe 61 and the intake connection pipe 4 are coaxially arranged. A through hole is provided on the pipe wall of the copper pipe 61, a flanging structure 62 is provided at the edge of the through hole, the flanging structure 62 faces the outside of the copper pipe 61, the top end of the oil equalizing pipe 7 is communicated with the exhaust pipe 5, and the bottom end of the oil equalizing pipe 7 is inserted into the flanging structure 62 and communicated with the copper pipe 61.

[0034] Among them, the inner diameter size of the flanging structure 62 is set according to the outer diameter size of the equalizing oil pipe 7. The equalizing oil pipe 7 can be inserted into the flanging structure 62, and the outer wall of the equalizing oil pipe 7 is in mutual fit with the inner wall of the flanging structure 62. Preferably, the equalizing oil pipe 7 is fixedly connected to the flanging structure 62.

[0035] In this embodiment, the equalizing oil pipe 7 is fixedly connected to the flanging structure 62 by welding. In other embodiments, the equalizing oil pipe 7 and the flanging structure 62 can also be fixedly connected by heat shrinkage or other means.

[0036] In this embodiment, the inner diameter of the flanging structure 62 remains consistent and is equal to the diameter of the through hole. In other embodiments, the inner diameter of the flanging structure 62 gradually increases from bottom to top, and the minimum inner diameter of the flanging structure 62 is equal to the diameter of the through hole. Thus, the gap between the bottom end of the equalizing oil pipe 7 and the flanging structure 62 also gradually increases from bottom to top, forming a flared shape, and more solder can be accumulated during welding, making the connection between the two more reliable.

[0037] Preferably, the flanging structure 62 is integrally connected with the copper pipe 61. The axial direction of the flanging structure 62 is consistent with the axial direction of the equalizing oil pipe 7, and the axial direction of the flanging structure 62 is perpendicular to the axial direction of the copper pipe 61.

[0038] Preferably, the bottom end of the equalizing oil pipe 7 maintains a preset distance from the intake connection pipe 4. Thus, siphoning can be avoided during subsequent welding to prevent blockage.

[0039] Please continue to refer to Figure 1 and Figure 3 , the compressor 100 with an equalizing oil pipe further includes a liquid receiver bracket (not labeled in the figure). The liquid receiver bracket is used to realize the fixed connection between the liquid receiver 3 and the housing 1. A bending connector 8 is arranged in the liquid receiver bracket. The bending connector 8 includes a vertical part and a horizontal part. The vertical part is fixedly connected to the housing 1. A limiting hole (not shown in the figure) is provided in the horizontal part. The equalizing oil pipe 7 is inserted into the limiting hole. Thus, the middle pipe body part of the equalizing oil pipe 7 is limited between the liquid receiver 3 and the housing 1 by the bending connector 8.

[0040] In this embodiment, since the middle pipe body part of the equalizing oil pipe 7 is arranged between the outside of the housing 1 and the liquid receiver 3, it is beneficial to save the internal space of the compressor, avoid increasing the size of the compressor and thus increasing the cost, and the welding between the equalizing oil pipe 7 and the copper pipe 61 can be carried out after the compressor body is assembled, which is easy to operate.

[0041] In order to better fix the equalizing oil pipe 7 and prevent the equalizing oil pipe 7 from being worn, a rubber sleeve can be additionally provided in the limiting hole of the bending connecting piece 8. The rubber sleeve is coaxially arranged with the limiting hole. The equalizing oil pipe 7 is inserted into the rubber sleeve, and the inner wall surface of the rubber sleeve is attached to the outer wall surface of the equalizing oil pipe 7. The rubber sleeve is fixed on the equalizing oil pipe 7 under the action of elasticity.

[0042] Please refer to Figure 4 and Figure 5 , the rubber sleeve has a central through hole. The diameter D1 of the central through hole is set according to the outer diameter of the equalizing oil pipe 7. The diameter of the central through hole is smaller than the outer diameter of the equalizing oil pipe 7 in the natural state and is consistent with the outer diameter of the equalizing oil pipe 7 in the elastic state. In order to facilitate the insertion of the equalizing oil pipe 7 into the rubber sleeve, a slit is provided in the side wall of the rubber sleeve. One end of the slit communicates with the central through hole, and the other end of the slit communicates with the outside.

[0043] In this embodiment, the rubber sleeve is an integrally formed structure. The outer diameter D2 of the rubber sleeve is 145 mm. The width d of the slit is less than 10 mm. The front end of the rubber sleeve is provided with a chamfer structure. The chamfer angle θ at the front end of the rubber sleeve is 30°. The rear end of the rubber sleeve is provided with a convex structure. The height of the convex structure is 6.5 mm. The maximum outer diameter D3 at the position where the convex structure is located is 158 mm.

[0044] In this embodiment, as long as the copper pipe of the original seat ring structure is lengthened, through holes are opened in the lengthened part and a flanging structure is provided at the same time, and the equalizing oil pipe 7 can be fixedly installed in cooperation with the original liquid receiver bracket, without adding new seat rings and new brackets, saving two components, reducing the manufacturing cost, and the position of the equalizing oil pipe 7 is fixed between the liquid receiver 3 and the housing 1, which not only occupies a small space but is also not easily deformed and damaged.

[0045] In this embodiment, the compressor 100 is a rotary compressor.

[0046] In summary, for the compressor with an equalizing oil pipe of the present invention, by lengthening the copper pipe of the seat ring structure, opening through holes in the lengthened part and providing a flanging structure at the same time, the connection and fixation of the equalizing oil pipe are realized, which can not only reduce the manufacturing cost but also fix the equalizing oil pipe between the liquid receiver and the housing, thereby reducing the space occupied by the equalizing oil pipe and preventing it from being damaged.

[0047] The above content is a further detailed description of the present application in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present application.

Claims

1. A compressor with an oil equalizing pipe, characterized in that, it includes: a housing, a cylinder, a liquid reservoir, an intake connection pipe, an exhaust pipe, a seat ring, an oil equalizing pipe, a rubber sleeve, and a liquid reservoir bracket; the cylinder is arranged inside the housing, an air suction hole is arranged on the cylinder, an opening is arranged on the side wall of the housing, the opening corresponds to the air suction hole of the cylinder, the seat ring is arranged in the opening and fixedly connected to the housing, the seat ring has a copper pipe, the intake connection pipe is inserted into the copper pipe, the liquid reservoir is arranged outside the housing and connected to the intake connection pipe, and the liquid reservoir is communicated with the air suction hole of the cylinder through the intake connection pipe; wherein, a through hole is opened on the pipe wall of the copper pipe, the edge of the through hole has a flanging structure, the flanging structure faces the outside of the copper pipe, the bottom end of the oil equalizing pipe is inserted into the flanging structure and communicated with the copper pipe, the top end of the oil equalizing pipe is communicated with the exhaust pipe, the liquid reservoir bracket has a bent connecting piece, the bent connecting piece includes a vertical part and a horizontal part, the vertical part is fixedly connected to the housing, a limiting hole is opened on the horizontal part, the oil equalizing pipe is inserted into the limiting hole, the rubber sleeve has a central through hole, the central through hole is coaxially arranged with the limiting hole, the rubber sleeve is sleeved in the limiting hole, the oil equalizing pipe is inserted into the central through hole of the rubber sleeve, and the inner wall of the rubber sleeve is attached to the outer wall surface of the oil equalizing pipe.

2. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the outer wall of the oil equalizing pipe is attached to the inner wall of the flanging structure, and the oil equalizing pipe is fixedly connected to the flanging structure.

3. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the inner diameter of the flanging structure remains the same, and the inner diameter of the flanging structure is equal to the diameter of the through hole; or the inner diameter of the flanging structure gradually increases from bottom to top, and the minimum inner diameter of the flanging structure is equal to the diameter of the through hole.

4. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the axial direction of the flanging structure is the same as the axial direction of the oil equalizing pipe.

5. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the axial direction of the flanging structure is perpendicular to the axial direction of the copper pipe.

6. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the flanging structure and the copper pipe are integrally formed.

7. The compressor with an oil equalizing pipe according to claim 1, characterized in that, a preset distance is maintained between the bottom end of the oil equalizing pipe and the intake connection pipe.

8. The compressor with an oil equalizing pipe according to claim 1, characterized in that, the compressor is a rotary compressor.

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