Cylinder and compressor

Abstract

The application provides a cylinder and a compressor, and the cylinder comprises a cylinder body, the cylinder body has a working cavity, an air suction channel and a diameter expansion part in the cylinder body, the air suction channel and the working cavity are communicated, the diameter expansion part is located between two ends of the air suction channel, and the diameter expansion part expands from the inner wall surface of the air suction channel to the cylinder body. According to the scheme, the diameter expansion part is arranged on the inner wall between the two ends of the air suction channel, and the structure can be understood as that the air suction channel expands radially in the area of the diameter expansion part. In this way, when the gas entering the air suction channel flows to the position of the diameter expansion part, the flow area is increased, so that the gas flow speed is reduced, the diameter expansion part plays a buffering role on the gas, and therefore, the air suction flow pulsation can be reduced, and the air suction aerodynamic noise can be reduced.

Description

Technical Field

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

[0002] A rotary compressor mainly consists of two major components: a pump body and a motor. The pump body assembly primarily includes a cylinder, crankshaft, rollers, vanes, and upper and lower flanges. The pump body crankshaft is interference-fitted with the motor rotor. The vane end faces make line contact, pressing against the outer surface of the rollers under the action of spring force and internal back pressure, thus dividing the internal volume of the cylinder and rollers into two crescent-shaped intake and compression chambers. Its working principle is that the crankshaft rotates periodically under the driving force of the motor, and its eccentric structure drives the rollers to rotate synchronously eccentrically. This, in turn, drives the vanes to perform radial reciprocating motion within the vane slots of the cylinder, causing the volumes of the intake and compression chambers to change accordingly, thereby realizing the periodic intake, compression, and exhaust process of the compressor.

[0003] As people's living standards improve, their requirements for compressor noise levels also increase. Aerodynamic noise caused by compressor intake is one of the main sources of compressor noise and needs to be optimized and improved during compressor product design. Especially in recent years, compressors have gradually become smaller, and due to space constraints, the compressor intake airflow path has been further reduced, resulting in a significant increase in intake airflow pulsation and thus, excessive intake aerodynamic noise. Summary of the Invention

[0004] This invention provides a cylinder and a compressor to solve the problem of large intake noise that easily occurs in miniaturized compressors.

[0005] To address the aforementioned problems, according to one aspect of the present invention, a cylinder is provided, comprising a cylinder body having a working chamber, an intake channel, and an expansion portion, wherein the intake channel and the working chamber are in communication, and the expansion portion is located between the two ends of the intake channel, the expansion portion expanding from the inner wall surface of the intake channel toward the cylinder body.

[0006] Furthermore, the enlarged diameter portion is a groove-shaped structure arranged around the axis of the air intake channel.

[0007] Furthermore, the outer periphery of the cross-section of the expanded diameter portion along the radial direction of the intake channel is circular, elliptical, or rectangular.

[0008] Furthermore, the outer periphery of the cross-section of the expanded section along the radial direction of the intake channel is elliptical, the major axis of the ellipse is perpendicular to the axial direction of the cylinder body, and the minor axis of the ellipse is parallel to the axial direction of the cylinder body.

[0009] Furthermore, a first transition fillet or a first chamfer is provided at the connection between the inner surface of the air intake channel and the side surface of the expanded diameter portion.

[0010] Furthermore, a second transition fillet or a second chamfer is provided at the connection between the side surface of the expanded diameter portion and the bottom surface of the expanded diameter portion.

[0011] Furthermore, there are multiple diameter-expanding sections, which are spaced apart along the length of the air intake channel.

[0012] Furthermore, the intake channel includes a first channel and a second channel that are interconnected. The first channel is connected to the outside of the cylinder body, and the second channel is connected to the working chamber. The flow area of ​​the first channel is larger than the flow area of ​​the second channel, and the enlarged diameter portion is located between the two ends of the second channel.

[0013] Furthermore, the cylinder body includes a first main body and a second main body connected to each other. The first main body has a first intake groove and a first recess, with the first recess located on the inner wall of the first intake groove. The second main body has a second intake groove and a second recess, with the second recess located on the inner wall of the second intake groove. The first intake groove and the second intake groove are connected to form the intake channel, and the first recess and the second recess are connected to form the diameter expansion portion.

[0014] Furthermore, the first body has an axial dimension of H1 in the cylinder body, and the second body has an axial dimension of H2 in the cylinder body, where H1 = H2.

[0015] According to another aspect of the present invention, a compressor is provided, the compressor comprising a crankshaft and the aforementioned cylinder, wherein an eccentric portion of the crankshaft is located in the working chamber of the cylinder.

[0016] The present invention provides a cylinder for a compressor, comprising a cylinder body, a working chamber, a suction channel, and an expansion section within the cylinder body. The suction channel and the working chamber are connected. The expansion section is located between the two ends of the suction channel and expands from the inner wall surface of the suction channel toward the cylinder body. This design, with the expansion section on the inner wall between the two ends of the suction channel, can be understood as the suction channel radially expanding in the expansion section region. This increases the flow area of ​​the gas entering the suction channel when it reaches the expansion section, thereby reducing the gas flow velocity. The expansion section acts as a buffer for the gas, thus reducing suction airflow pulsation and suction aerodynamic noise. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the cylinder provided in Embodiment 1 of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A cross-sectional view of the cylinder in the intake passage from the radial direction;

[0020] Figure 3 A schematic diagram of the cylinder provided in Embodiment 2 of the present invention is shown;

[0021] Figure 4 A schematic diagram of the cylinder provided in Embodiment 3 of the present invention is shown;

[0022] Figure 5 A partial view of the cylinder at the expanded diameter section according to Embodiment 4 of the present invention is shown;

[0023] Figure 6 A partial view of the cylinder at the expanded diameter section according to Embodiment 5 of the present invention is shown;

[0024] Figure 7 A partial view of the cylinder at the expanded diameter section according to Embodiment Six of the present invention is shown;

[0025] Figure 8 A schematic diagram of the cylinder provided in Embodiment 7 of the present invention is shown;

[0026] Figure 9 A schematic diagram of the cylinder provided in Embodiment 8 of the present invention is shown;

[0027] Figure 10 A schematic diagram of a portion of the structure of the compressor provided in Embodiment 9 of the present invention is shown;

[0028] Figure 11 The illustration shows a comparison in use between the cylinder of this application and a prior art cylinder without an expanded diameter section.

[0029] The above figures include the following reference numerals:

[0030] 10. Cylinder block; 11. First main body; 12. Second main body; 20. Working chamber; 30. Intake channel; 31. First intake groove; 32. Second intake groove; 40. Expanded diameter section; 41. First transition fillet; 42. First chamfer; 43. Second transition fillet; 44. Second chamfer; 45. First groove; 46. Second groove; 47. Side surface; 48. Bottom surface; 50. Crankshaft. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention provides a cylinder, including a cylinder body 10. The cylinder body 10 has a working chamber 20, an intake channel 30, and an expansion portion 40. The intake channel 30 and the working chamber 20 are connected. The expansion portion 40 is located between the two ends of the intake channel 30, and the expansion portion 40 expands from the inner wall surface of the intake channel 30 toward the cylinder body 10. Here, "between the two ends of the intake channel 30" refers to a position not at either end of the intake channel 30. It can also be understood that, along the length of the intake channel 30, each side of the expansion portion 40 has a portion of the intake channel 30, and the lengths of the two portions may be equal or unequal.

[0033] In this design, an expansion section 40 is provided on the inner wall between the two ends of the intake channel 30. This structure can be understood as the intake channel expanding radially in the expansion section area. In this way, when the gas entering the intake channel flows to the expansion section, the flow area increases, thereby reducing the gas flow velocity. The expansion section plays a buffering role for the gas, thereby reducing the pulsation of the intake airflow and reducing the intake aerodynamic noise.

[0034] The enlarged diameter portion 40 can expand into the cylinder 10 in a portion (e.g., 270°) of the circumference of the intake passage 30, or it can expand into the cylinder 10 in the entire circumference (i.e., 360°) of the intake passage 30.

[0035] Specifically, in this embodiment, the enlarged diameter portion 40 is a groove-shaped structure arranged around the axis of the intake channel 30. This improves the buffering effect on airflow and reduces intake noise. Preferably, the enlarged diameter portion 40 is coaxially designed with the cylinder's intake channel 30.

[0036] This solution is applied to compressors. When gaseous refrigerant flows out from the distributor and enters the intake passage 30 of the cylinder, it flows through the expansion section 40. Due to the increase in flow area and volume, the gas flow rate is greatly reduced, which plays a buffering role on the intake gas, reduces the pulsation of the compressor intake airflow, and reduces the compressor intake aerodynamic noise.

[0037] like Figure 2 As shown, in this embodiment, the outer periphery of the cross section of the enlarged diameter portion 40 along the radial direction of the intake channel 30 is circular.

[0038] Or, such as Figure 3 As shown, in Embodiment 2, the outer periphery of the cross-section of the expanded diameter portion 40 along the radial direction of the intake channel 30 is elliptical. Alternatively, as... Figure 4 As shown, in Embodiment 3, the outer periphery of the cross-section of the expanded diameter portion 40 along the radial direction of the intake channel 30 is rectangular. Of course, the expanded diameter portion 40 can also be configured with other shapes.

[0039] Specifically, in Figure 3 In the cylinder, the outer periphery of the cross-section of the expansion section 40 along the radial direction of the intake channel 30 is elliptical. The major axis of the ellipse is perpendicular to the axial direction of the cylinder 10, and the minor axis is parallel to the axial direction of the cylinder 10. This allows for full utilization of the radial dimension of the cylinder 10 within the limited space of the cylinder 10, increasing the volume of the expansion section 40, thereby improving the buffering effect on airflow and further reducing noise.

[0040] like Figure 5 and Figure 6 As shown, a first transition fillet 41 or a first chamfer 42 is provided at the connection between the inner surface of the intake channel 30 and the side surface 47 of the expansion section 40. Alternatively, a second transition fillet 43 or a second chamfer 44 is provided at the connection between the side surface 47 of the expansion section 40 and the bottom surface 48 of the expansion section 40. This allows for smoother gas flow, reduces the impact force of gas on the inner wall of the expansion section 40 and the intake channel 30, thereby reducing the noise generated by gas impact to a certain extent, and also preventing the gas from generating eddies at the edges.

[0041] Of course, the connection between the inner surface of the intake channel 30 and the side surface 47 of the expansion section 40 can be a right-angle transition, and the connection between the side surface 47 of the expansion section 40 and the bottom surface 48 of the expansion section 40 can be a right-angle transition, which facilitates processing.

[0042] like Figure 8 As shown, in another embodiment, there are multiple expansion sections 40, which are spaced apart along the length of the intake channel 30. By providing multiple expansion sections 40, the buffering and noise reduction effect on the airflow can be further improved, enhancing the user experience. The expansion sections 40 are connected in series, and each expansion section 40 can be designed with a different size, thereby effectively improving the intake noise reduction effect.

[0043] Furthermore, in Figure 1 In the middle, the intake channel 30 includes a first channel and a second channel that are interconnected. The first channel is connected to the outside of the cylinder body 10, and the second channel is connected to the working chamber 20. The flow area of ​​the first channel is larger than that of the second channel, and the expansion section 40 is located between the two ends of the second channel.

[0044] Or, such as Figure 9 As shown, in another embodiment, the intake channel 30 includes a first channel and a second channel that are interconnected. The first channel is connected to the outside of the cylinder 10, and the second channel is connected to the working chamber 20. The flow area of ​​the first channel is larger than that of the second channel, and the enlarged diameter portion 40 is located between the two ends of the first channel.

[0045] In this application, the cylinder can be a one-piece molded structure. Alternatively, for ease of manufacturing, the cylinder body 10 includes a first main body 11 and a second main body 12 connected to each other. The first main body 11 has a first intake groove 31 and a first recess 45, with the first recess 45 located on the inner wall of the first intake groove 31. The second main body 12 has a second intake groove 32 and a second recess 46, with the second recess 46 located on the inner wall of the second intake groove 32. The first intake groove 31 and the second intake groove 32 are joined to form an intake channel 30, and the first recess 45 and the second recess 46 are joined to form an expanded diameter portion 40. That is, the cylinder body 10 is configured as a split structure, so that the first recess 45 and the second recess 46 can be machined separately first, and then the first recess 45 and the second recess 46 can be fitted together to form the expanded diameter portion 40. This method can reduce manufacturing costs.

[0046] Furthermore, the first body 11 has a first through hole, and the second body 12 has a second through hole. The first through hole and the second through hole are connected, and the first through hole and the second through hole form a working cavity 20.

[0047] Specifically, the first main body 11 has an axial dimension of H1 in the cylinder 10, and the second main body 12 has an axial dimension of H2 in the cylinder 10, where H1 = H2. This facilitates machining, and the first main body 11 and the second main body 12 have similar structural strength.

[0048] like Figure 10 As shown, another embodiment of the present invention provides a compressor, which includes a crankshaft 50 and the aforementioned cylinder, with the eccentric portion of the crankshaft 50 located in the working chamber 20 of the cylinder. In this design, an expansion portion 40 is provided on the inner wall between the two ends of the intake passage 30. This structure can be understood as the intake passage radially expanding in the expansion portion region. Thus, when the gas entering the intake passage flows to the expansion portion, the flow area increases, thereby reducing the gas flow velocity. The expansion portion acts as a buffer for the gas, thereby reducing intake airflow pulsation and intake aerodynamic noise.

[0049] like Figure 11 As shown, the inventor verified the effectiveness of this technical solution in a compressor prototype. The main performance was a significant reduction in the total noise level below 2000Hz. While the total noise level across the entire frequency band was reduced to some extent, the reduction was less than that of the total noise level below 2000Hz. Furthermore, under the same national standard operating conditions, the noise improvement effect was better as the frequency increased.

[0050] This solution addresses the following technical problems inherent in conventional rolling rotor compressors: With the trend towards compressor miniaturization, the pump body's suction air passage is further reduced due to space constraints. This results in a significant increase in airflow pulsation when the pump body draws air through the cylinder suction air passage, leading to substantial suction noise and severely impacting the auditory experience of miniaturized compressors.

[0051] This invention provides a noise reduction cylinder structure for intake air of a rotary compressor. By designing an axially combined cylinder structure, the cylinder channel is designed as an intake air passage structure with one or more expansion sections, thereby buffering the gas entering the intake channel and reducing aerodynamic noise caused by airflow pulsation.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cylinder, characterized in that, The system includes a cylinder body (10), which has a working chamber (20), an intake channel (30), and a plurality of expansion sections (40). The intake channel (30) is connected to the working chamber (20). The plurality of expansion sections (40) are located between the two ends of the intake channel (30) and are spaced apart along the length of the intake channel (30). The expansion sections (40) expand from the inner wall surface of the intake channel (30) toward the cylinder body (10). The expansion sections (40) are groove-shaped structures arranged around the axis of the intake channel (30). The intake channel (30) includes a first channel and a second channel that are interconnected. The first channel is connected to the outside of the cylinder body (10), and the second channel is connected to the working chamber (20). The flow area of ​​the first channel is greater than that of the second channel, and the expansion portion (40) is located between the two ends of the second channel; wherein, the cylinder body (10) includes a first main body (11) and a second main body (12) connected to each other, the first main body (11) has a first suction groove (31) and a first groove (45), the first groove (45) is located on the inner wall of the first suction groove (31), the second main body (12) has a second suction groove (32) and a second groove (46), the second groove (46) is located on the inner wall of the second suction groove (32), wherein the first suction groove (31) and the second suction groove (32) are connected to form the suction channel (30), and the first groove (45) and the second groove (46) are connected to form the expansion portion (40).

2. The cylinder according to claim 1, characterized in that, The outer periphery of the cross section of the enlarged section (40) along the radial direction of the intake channel (30) is circular, elliptical or rectangular.

3. The cylinder according to claim 2, characterized in that, The outer periphery of the cross section of the expanded section (40) along the radial direction of the intake channel (30) is elliptical. The major axis of the ellipse is perpendicular to the axial direction of the cylinder (10), and the minor axis of the ellipse is parallel to the axial direction of the cylinder (10).

4. The cylinder according to claim 1, characterized in that, The connection between the inner surface of the air intake channel (30) and the side surface (47) of the expanded diameter portion (40) is provided with a first transition fillet (41) or a first chamfer (42).

5. The cylinder according to claim 1, characterized in that, A second transition fillet (43) or a second chamfer (44) is provided at the connection between the side surface (47) and the bottom surface (48) of the expanded diameter portion (40).

6. The cylinder according to claim 1, characterized in that, The first body (11) has an axial dimension of H1 in the cylinder (10), and the second body (12) has an axial dimension of H2 in the cylinder (10), where H1 = H2.

7. A compressor, characterized in that, The compressor includes a crankshaft (50) and a cylinder according to any one of claims 1 to 6, wherein the eccentric portion of the crankshaft (50) is located in the working chamber (20) of the cylinder.

Images