Rotary compressor and refrigeration apparatus

Abstract

The utility model discloses a rotary compressor and refrigeration plant relates to compressor technical field, and rotary compressor includes cylinder body and two sealing end covers, and cylinder body has two ends in first direction, the cylinder body has a chamber, and two openings of being located at two ends and communicating the chamber, the lateral part of cylinder body is provided with the suction hole of communicating with the chamber, two sealing end covers are installed respectively in two ends of cylinder body, and the two ports of closing the cylinder body are set to form the compression cavity with cylinder body, and the periphery position of at least one sealing end cover forms the thinning area, and at least part of thinning area is opposite with the suction hole in first direction and sets up, in this application, the sealing end cover and the cylinder body form the closer fit in the suction hole area, thereby reducing the gap of sealing end cover and cylinder body lock -tight assembly and reducing the possibility of refrigerant gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a rotary compressor and refrigeration equipment. Background Technology

[0002] In related technologies, the cylinder of a rotary compressor needs to have an air intake port. The cylinder wall thickness is relatively thinner in the area of ​​the air intake port. After the cylinder is locked with the upper and lower sealing end caps, gaps are easily generated between the upper and lower sealing end caps and the cylinder in the area of ​​the air intake port, which can lead to refrigerant gas leakage. Utility Model Content

[0003] The main purpose of this invention is to provide a rotary compressor and refrigeration equipment, which aims to solve the problem in related technologies where gaps easily form in the suction port area after the cylinder and sealing end cap are assembled, leading to refrigerant gas leakage.

[0004] To achieve the above objectives, this utility model proposes a rotary compressor, which includes: A cylinder body has two ends in a first direction, the cylinder body has a chamber and two openings at both ends communicating with the chamber, and an intake port communicating with the chamber is provided on the side of the cylinder body; and Two sealing end caps are respectively installed at both ends of the cylinder body and cover the two ports of the cylinder body to form a compression cavity with the cylinder body. At least one of the sealing end caps has a thinning area at its periphery, and at least a portion of the thinning area is arranged opposite to the air intake in a first direction.

[0005] In one embodiment, a groove is provided on the outer side of the sealing end cap, and the area where the groove is located is the thinning area.

[0006] In one embodiment, the groove extends through the outer surface of the sealing end cap.

[0007] In one embodiment, the bottom surface of the groove is a plane.

[0008] In one embodiment, the side portion of the cylinder body protrudes laterally from the sealing end cap.

[0009] In one embodiment, the air intake includes a first section communicating with the compression chamber at one end, and a second section communicating with the other end of the first section; The projection of the first aperture segment in the first direction is located within the thinning region, and the projection of the second aperture segment in the first direction is at least partially located outside the thinning region.

[0010] In one embodiment, the projection of the air intake in the first direction is located within the thinning region.

[0011] In one embodiment, the thinning zone is staggered from the corresponding opening.

[0012] In one embodiment, the end cap is bolted to the cylinder body, and the bolt is located outside the thinning area.

[0013] This utility model also proposes a refrigeration device, which includes a rotary compressor.

[0014] In the technical solution of this application, a thinning area is provided on the periphery of the sealing end cover, which is opposite to the suction port of the cylinder body. This reduces the local stiffness of the thinning area of ​​the sealing end cover, making it easier for the deformation degree of the sealing end cover corresponding to the thinning area to be close to the deformation degree of the cylinder body at the corresponding suction port when the sealing end cover is locked and assembled with the cylinder body. This helps to promote a tighter fit between the sealing end cover and the cylinder body in the suction port area, thereby reducing the gap generated after the sealing end cover and the cylinder body are locked and assembled and reducing the possibility of refrigerant gas leakage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Fig. 1 A schematic diagram of the structure of a rotary compressor provided in one embodiment of this utility model; Fig. 2 A cross-sectional view of a rotary compressor provided in one embodiment of the present invention; Fig. 3 This is a schematic diagram of the structure of a sealing end cap provided in one embodiment of the present invention.

[0017] Explanation of icon numbers: 1. Cylinder block; 2. Chamber; 21. Compression chamber; 3. Intake port; 31. First hole section; 32. Second hole section; 4. Sealing end cap; 5. Thinning area; 51. Groove; 6. Bolt.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In related technologies, the cylinder of a rotary compressor needs to have an air intake port. The cylinder wall thickness is relatively thinner in the area of ​​the air intake port. After the cylinder is locked with the upper and lower sealing end caps, gaps are easily generated between the upper and lower sealing end caps and the cylinder in the area of ​​the air intake port, which can lead to refrigerant gas leakage.

[0023] In view of this, this application proposes a rotary compressor. Figs. 1-3 These are some embodiments of this application.

[0024] Please see Figs. 1-3In some embodiments of this application, the rotary compressor includes a cylinder 1 and two sealing end caps 4. The cylinder 1 has two ends in a first direction, a chamber 2, and two openings at its two ends that communicate with the chamber 2. The side of the cylinder 1 is provided with an intake port 3 that communicates with the chamber 2. The sealing end caps 4 are respectively installed at both ends of the cylinder 1 and cover the two ports of the cylinder 1 to form a compression chamber 21. Low-pressure gaseous refrigerant enters the compression chamber 21 formed by the cylinder 1 and the two sealing end caps 4 through the intake port 3 on the side of the cylinder 1. The gaseous refrigerant in the compression chamber 21 is compressed by a rotating component, such as a cam. As the rotating component continues to operate, the gas drawn into the compression chamber 21 is compressed and isolated, causing its pressure and temperature to rise. When the pressure in the compression chamber 21 exceeds the exhaust resistance, the high-pressure gas is discharged from the exhaust port on one of the sealing end caps 4, thereby realizing the intake, compression, and exhaust cycle of the rotary compressor.

[0025] In some embodiments of this application, at least one of the sealing end caps 4 has a thinning region 5 formed at its periphery, and at least a portion of the thinning region 5 is disposed opposite to the air intake 3 in a first direction; in this embodiment, by providing a thinning region 5 at the periphery of the sealing end cap 4 that is opposite to the air intake 3 of the cylinder body 1, the local stiffness of the thinning region 5 of the sealing end cap 4 is reduced.

[0026] In light of the above, in the technical solution of this application, a thinning area 5 is provided on the periphery of the sealing end cover 4, which is opposite to the suction port 3 of the cylinder body 1, to reduce the local stiffness of the thinning area 5 of the sealing end cover 4. This makes it easier for the deformation degree of the sealing end cover 4 corresponding to the thinning area 5 to be close to the deformation degree of the cylinder body 1 corresponding to the suction port 3 when the sealing end cover 4 is locked and assembled with the cylinder body 1. This helps to promote a tighter fit between the sealing end cover 4 and the cylinder body 1 in the suction port 3 area, thereby reducing the gap generated after the sealing end cover 4 and the cylinder body 1 are locked and assembled and reducing the possibility of refrigerant gas leakage.

[0027] The formation method of the thinning region 5 is not limited. It can be achieved by local machining, stamping, direct forming during casting, or chemical etching around the periphery of the sealing end cap 4.

[0028] In some embodiments of this application, a groove 51 is provided on the outer side of the sealing end cap 4, and the area where the groove 51 is located is the thinning area 5. In this embodiment, by providing a groove 51 on the outer side of the sealing end cap 4 to form a thinning area 5, the material thickness of the corresponding area can be effectively reduced, thereby specifically reducing the local stiffness of the sealing end cap 4 and the corresponding position of the suction hole 3. The structure of the groove 51 makes it easier for the area where the groove 51 is located to deform when the sealing end cap 4 and the cylinder 1 are locked together, so as to better match the deformation trend of the cylinder 1 at the suction hole 3, thereby making the sealing end cap 4 and the cylinder 1 more evenly pressed and fitted, reducing the gap caused by the deformation incoordination between the sealing end cap 4 and the cylinder 1, and reducing the possibility of refrigerant gas leakage.

[0029] It should be noted that the shape of the groove 51 is not limited; it can be any shape, such as rectangular, circular, or irregular; it is sufficient to ensure that at least a portion of the groove 51 is opposite to the air intake 3 in the first direction.

[0030] In some embodiments of this application, the groove 51 is provided through the outer side of the sealing end cap 4. In this embodiment, by providing the groove 51 through the outer side of the sealing end cap 4, the material removal of the sealing end cap 4 in the thinning area 5 can be achieved to a greater extent, thereby further weakening the local rigidity of the sealing end cap 4 at the position corresponding to the thinning area 5. This makes it easier for the sealing end cap 4 portion corresponding to the suction hole 3 in the groove 51 portion to deform when locked and assembled with the cylinder body 1. This makes the deformation degree of the sealing end cap 4 at the groove 51 portion close to the deformation degree of the cylinder body 1 at the corresponding suction hole 3 portion, prompting the sealing end cap 4 and the cylinder body 1 to form a tighter fit at the suction hole 3 position, thereby suppressing the risk of refrigerant gas leakage.

[0031] In some embodiments of this application, the bottom surface of the groove 51 is a plane; in this embodiment, by setting the bottom surface of the groove 51 to be a plane, the thickness of the sealing end cap 4 is uniform at each part of the corresponding groove 51, so that after the sealing end cap 4 and the cylinder body 1 are locked together, the degree of deformation of the sealing end cap 4 at each part of the groove 51 tends to be consistent, which promotes a tighter fit between the sealing end cap 4 and the cylinder body 1 at the air intake 3 position, thereby suppressing the risk of refrigerant gas leakage.

[0032] In some embodiments of this application, the groove wall of the groove 51 is arc-shaped. In this embodiment, designing the groove wall of the groove 51 as arc-shaped can optimize the stress distribution of the cylinder body 1 in the area where the groove 51 is located, effectively avoid stress concentration caused by the groove 51 having sharp or right angle areas, and improve the fatigue strength and fracture resistance of the sealing end cap 4 in the thinning area 5.

[0033] In some embodiments of this application, the side portion of the cylinder 1 protrudes laterally from the sealing end cover 4; the protruding portion is used to fix it to the housing of the rotary compressor; in this embodiment, by making the side portion of the cylinder 1 protrude laterally from the sealing end cover 4, an installation area is formed on the cylinder 1 that is fixed to the housing of the rotary compressor, thereby enhancing the reliability of the fixation between the assembly of the cylinder 1 and the two sealing end covers 4 and the housing of the rotary compressor.

[0034] The portion of the cylinder body 1 that protrudes laterally from the sealing end cover 4 ensures that the sealing end cover 4 does not obstruct the installation area of ​​the cylinder body 1 in the first direction, and also facilitates the operator or operating tool to fix the cylinder body 1 and the outer casing of the rotary compressor.

[0035] Furthermore, since the side of the cylinder body 1 protrudes laterally from the sealing end cover 4, a portion of the intake port 3 located on the cylinder body 1 will also protrude from the sealing end cover 4. That is, a portion of the intake port 3 will be offset from the sealing end cover 4 in the first direction. Therefore, please refer to... Fig. 2 In some embodiments of this application, the suction port 3 includes a first segment 31 connected to the compression chamber 21 at one end, and a second segment 32 connected to the other end of the first segment 31; the projection of the first segment 31 in the first direction is located within the thinning zone 5, and the projection of the second segment 32 in the first direction is at least partially located outside the thinning zone 5; that is, in this embodiment, based on the structural design of a portion of the cylinder 1 laterally protruding from the sealing end cap 4, the suction port 3 is divided into a first segment 31 and a second segment 32. Since the first segment 31 is located within the assembly area of ​​the sealing end cap 4 and the cylinder 1, the sealing end cap 4 is provided with a thinning zone 5 in the portion corresponding to the first segment 31, so that when the sealing end cap 4 and the cylinder 1 are locked together, the deformation degree of the sealing end cap 4 in the thinning zone 5 is close to the deformation degree of the cylinder 1 at the corresponding first segment 31, which promotes a tighter fit between the sealing end cap 4 and the cylinder 1 at the first segment 31, thereby suppressing the risk of refrigerant gas leakage.

[0036] like Fig. 2 As shown, the dashed line A divides the air intake 3 into the first section 31 and the second section 32.

[0037] In some embodiments of this application, the projection of the sealing end cap 4 in the first direction falls entirely on the cylinder body 1, so as to fix the cylinder body 1 to the housing of the rotary compressor.

[0038] In some embodiments of this application, the projection of the suction port 3 in the first direction is located within the thinning region 5. This arrangement ensures that the thin-walled area of ​​the cylinder 1 where the suction port 3 is located corresponds spatially to the thinning region 5 on the sealing end cap 4, which has relatively weak rigidity. That is, the thinning region 5 can completely cover the suction port 3. This design allows the sealing end cap 4 to completely cover the thin-walled area of ​​the cylinder 1 around the suction port 3 when the cylinder 1 and the sealing end cap 4 are locked together. This creates a reliable seal between the sealing end cap 4 and the cylinder 1, reducing the gap caused by the mismatch in deformation between the sealing end cap 4 and the cylinder 1, and reducing the possibility of refrigerant gas leakage.

[0039] Of course, in the above-mentioned embodiment where the suction port 3 includes the first hole segment 31 and the second hole segment 32, the projection of the first hole segment 31 in the first direction is completely located within the thinning area 5, so as to ensure that when the cylinder body 1 and the sealing end cover 4 are locked together, the area where the sealing end cover 4 deforms in the thinning area 5 can completely cover the thin-walled area of ​​the cylinder body 1 around the first hole segment 31, thereby forming a reliable seal between the sealing end cover 4 and the cylinder body 1, so as to reduce the gap caused by the deformation incoordination between the sealing end cover 4 and the cylinder body 1, and reduce the possibility of refrigerant gas leakage.

[0040] In some embodiments of this application, the thinning area 5 is staggered from the corresponding opening. In this embodiment, by setting the thinning area 5 outside the opening range of the cylinder body 1 and corresponding to the air intake 3 in the first direction, the local stiffness of the sealing end cover 4 and the corresponding air intake 3 is reduced without weakening the overall stiffness of the opening portion of the sealing chamber 2 of the sealing end cover 4. This improves the sealing effect between the sealing end cover 4 and the cylinder body 1 while avoiding other sealing or assembly reliability problems that may be caused by excessively weakening the end cover strength.

[0041] In some embodiments of this application, the end cap is connected to the cylinder 1 by bolts 6, and the bolts 6 are located outside the thinning area 5. In this embodiment, by arranging the bolts 6 outside the thinning area 5, the tightening force of the bolts 6 can be mainly transmitted through the area with higher rigidity of the sealing end cap 4, avoiding the bolts 6 being directly screwed into the thinning area 5 and causing additional deformation of the thinning area 5 due to the torque of the bolts 6. This allows the deformation of the thinning area 5 to match the deformation of the cylinder 1 at the suction port 3, thereby reducing the gap caused by the mismatch in deformation between the sealing end cap 4 and the cylinder 1, and reducing the possibility of refrigerant gas leakage.

[0042] It should be further explained that during the process of fixing the cylinder body 1 and the sealing end cover 4 with bolts 6, the assembly torque generated by tightening bolts 6 will cause the sealing end cover 4 and the cylinder body 1 to deform accordingly. Therefore, the sealing end cover 4 of this application is provided with a thinning area 5 at the corresponding air intake 3 of the cylinder body 1 to reduce the gap caused by the deformation incoordination between the sealing end cover 4 and the cylinder body 1, and to reduce the possibility of refrigerant gas leakage.

[0043] Furthermore, the rotary compressor in this application may have a thinning area 5 provided at the position corresponding to the suction port 3 on one of the two sealing end caps 4, or both sealing end caps 4 may have a thinning area 5 provided at the position corresponding to the suction port 3; no limitation is made here.

[0044] This application also proposes a refrigeration device, which includes a rotary compressor as described above. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotary compressor, characterized in that, include: A cylinder body has two ends in a first direction, the cylinder body has a chamber and two openings at both ends communicating with the chamber, and an intake port communicating with the chamber is provided on the side of the cylinder body; and Two sealing end caps are respectively installed at both ends of the cylinder body and cover the two ports of the cylinder body to form a compression cavity with the cylinder body. At least one of the sealing end caps has a thinning area at its periphery, and at least a portion of the thinning area is arranged opposite to the air intake in a first direction.

2. The rotary compressor as described in claim 1, characterized in that, The outer side of the sealing end cap is provided with a groove, and the area where the groove is located is the thinning area.

3. The rotary compressor as described in claim 2, characterized in that, The groove is provided through the outer side of the sealing end cap.

4. The rotary compressor as described in claim 2, characterized in that, The bottom surface of the groove is a plane.

5. The rotary compressor as described in any one of claims 1 to 4, characterized in that, The side portion of the cylinder body protrudes laterally from the sealing end cap.

6. The rotary compressor as described in claim 5, characterized in that, The air intake port includes a first section that communicates with the compression chamber at one end, and a second section that communicates with the other end of the first section. The projection of the first aperture segment in the first direction is located within the thinning region, and the projection of the second aperture segment in the first direction is at least partially located outside the thinning region.

7. The rotary compressor as described in any one of claims 1 to 4, characterized in that, The projection of the air intake in the first direction is located within the thinning zone.

8. The rotary compressor as described in any one of claims 1 to 4, characterized in that, The thinning zone is staggered from the corresponding opening.

9. The rotary compressor as described in any one of claims 1 to 4, characterized in that, The end cap is bolted to the cylinder body, and the bolt is located outside the thinning area.

10. A refrigeration device, characterized in that, Including the rotary compressor as described in any one of claims 1 to 9.

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