Double-cylinder rolling rotor compressor suction flow channel structure and compressor

Abstract

The utility model provides a kind of double-cylinder rolling rotor compressor suction flow passage structure and compressor, the suction flow passage structure includes upper cylinder, intermediate plate and lower cylinder sequentially arranged along axial direction;Upper cylinder includes upper cylinder body and the first passage and the second passage of being arranged in upper cylinder body, and the inside of upper cylinder body forms upper compression chamber;Intermediate plate is provided with the third passage through its thickness;Lower cylinder includes lower cylinder body and the fourth passage of being arranged in lower cylinder body, and the inside of lower cylinder body forms lower compression chamber, and one end of fourth passage is communicated with third passage, and other end is communicated with lower compression chamber;One end of first passage constitutes suction port communicated with outside, and other end is communicated with upper compression chamber, and both ends of second passage are respectively communicated with first passage and third passage;The side wall of the communication of second passage and first passage is provided with first bevel cutout;Second bevel cutout is formed in the side wall of the communication of third passage and fourth passage.The suction flow passage structure improves compressor suction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of twin-cylinder compressor technology, specifically to a twin-cylinder rolling rotor compressor suction channel structure and compressor. Background Technology

[0002] As a core component of modern refrigeration and air conditioning systems, the performance and structural design of the rotary compressor directly affect the overall energy efficiency, reliability, and installation adaptability of the unit. In the design of a twin-cylinder rotary compressor, the suction structure is one of the key factors influencing internal flow characteristics and overall performance. Currently, the industry mainly employs two design approaches: dual-suction structure and single-suction structure.

[0003] Dual-suction compressors typically employ two independent suction lines, each serving one of the compressor's two cylinders. In contrast, single-suction compressors in twin-cylinder rotary compressors offer advantages over dual-suction compressors. The single suction line for the receiver allows for a smaller cylinder size, facilitating installation in air conditioning systems and simplifying external piping connections. This also makes it easier to achieve a compact integration of the receiver and compressor body. However, single-suction compressors have a smaller flow area and higher flow resistance, requiring optimized design to reduce suction pressure loss.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To address the problems in the existing technology, the purpose of this utility model is to provide a suction flow channel structure and compressor for a dual-cylinder rolling rotor compressor. This suction flow channel structure expands the suction flow path while optimizing the airflow route, reducing flow resistance and suction resistance, thereby improving the suction efficiency of the compressor.

[0006] The first aspect of this utility model provides a suction channel structure for a dual-cylinder rolling rotor compressor, comprising an upper cylinder, an intermediate plate, and a lower cylinder arranged sequentially along the axial direction. The upper cylinder includes an upper cylinder body and a first channel and a second channel disposed in the upper cylinder body, and an upper compression chamber is formed inside the upper cylinder body; The intermediate plate is provided with a third channel that extends through its thickness; The lower cylinder includes a lower cylinder body and a fourth channel disposed in the lower cylinder body. The interior of the lower cylinder body forms a lower compression chamber. One end of the fourth channel is connected to the third channel, and the other end is connected to the lower compression chamber. One end of the first channel forms an air intake that communicates with the outside, and the other end communicates with the upper compression chamber. The two ends of the second channel are respectively connected to the first channel and the third channel. A first oblique cut is provided on the side wall at the connection between the second channel and the first channel; A second oblique cut is formed on the sidewall at the junction of the third channel and the fourth channel.

[0007] According to a first aspect of the present invention, the included angle between the first oblique cut and the end face of the upper cylinder body is θ, which satisfies: 30°≤θ≤65°.

[0008] According to a first aspect of the present invention, the included angle between the second oblique cut and the end face of the intermediate plate is β, satisfying: 30°≤β≤65°.

[0009] According to a first aspect of the present invention, with the axis of the second channel as the center, the central angles corresponding to the two ends of the first oblique cut are between 60° and 135°.

[0010] According to a first aspect of the present invention, the first oblique cut is disposed on the side away from the upper compression cavity.

[0011] According to a first aspect of the present invention, with the axis of the third channel as the center, the central angles corresponding to the two ends of the second oblique cut are between 60° and 135°.

[0012] According to a first aspect of the present invention, the second oblique cut is disposed on the side close to the lower compression cavity.

[0013] According to a first aspect of the present invention, the fourth channel is an oblique through hole cut into the inner wall of the lower cylinder, and the angle between the axis of the air through the oblique through hole and the end face of the lower cylinder body is α, satisfying: 30°≤α≤65°.

[0014] According to a first aspect of the present invention, the fourth channel is an oblique through hole cut into the inner wall of the lower cylinder, and the angle between the axis of the air through the oblique through hole and the upper end face of the lower cylinder body is α; The angle between the second oblique cut and the end face of the intermediate plate is β, which satisfies: α=β.

[0015] The second aspect of this utility model provides a compressor, which is a dual-cylinder rolling rotor compressor, including the suction channel structure described in the first aspect.

[0016] This utility model discloses a dual-cylinder rolling rotor compressor with a single suction airflow channel structure. This single suction airflow channel structure includes a first and second channel of the lower cylinder, a third channel of the intermediate plate, and a fourth channel of the lower cylinder that are connected. The cooling capacity is delivered from the liquid receiver suction pipe to the suction chamber of the lower cylinder through the above-mentioned suction airflow channel. An oblique cut is added at the junction of the second and first channels of the upper cylinder near the liquid receiver, and an oblique cut is added to the third channel of the intermediate plate near the compression chamber of the lower cylinder. This expands the suction airflow path and optimizes the airflow route, reduces flow resistance and suction resistance, thereby improving suction efficiency. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the suction channel structure of a dual-cylinder rolling rotor compressor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper cylinder of the suction channel structure of a dual-cylinder rolling rotor compressor according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the intermediate plate of the suction channel structure of a dual-cylinder rolling rotor compressor according to an embodiment of the present invention. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0020] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and settings are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, further elaborates on the suction channel structure and compressor of the present invention for a dual-cylinder rolling rotor compressor. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present invention.

[0024] This utility model provides a suction flow channel structure for a dual-cylinder rolling rotor compressor. Figure 1 This is a schematic diagram of the suction channel structure of a dual-cylinder rolling rotor compressor according to an embodiment of the present invention. Specifically, the suction channel structure includes an upper cylinder 1, an intermediate plate 2, and a lower cylinder 3 arranged sequentially along the axial direction.

[0025] Figure 2 This is a schematic diagram of the upper cylinder of a dual-cylinder rolling rotor compressor suction channel structure according to an embodiment of the present invention. The upper cylinder 1 includes an upper cylinder body 11 and a first channel H1 and a second channel H2 disposed on the upper cylinder body 11. The upper cylinder body 11 serves as the main structure of the upper cylinder 1, and an upper compression chamber C1 is formed inside the upper cylinder body 11. The upper compression chamber C1 is typically a cylindrical cavity, and its centerline is defined as the centerline of the upper cylinder body 11. Of course, a vane groove 13 is also provided on the upper cylinder body 11. One end of the vane groove 13 communicates with the upper compression chamber C1, and the other end extends outward along the radial direction of the upper cylinder body 11, which will not be described in detail here. One end of the first channel H1 forms an air intake port communicating with the outside, and the other end communicates with the upper compression chamber C1.

[0026] Figure 3The diagram shows the structure of the intermediate plate of the suction channel structure of a dual-cylinder rolling rotor compressor according to an embodiment of the present invention. The intermediate plate 2 is provided with a third channel H3 that extends through its thickness. The second channel H2 is located on one side of the vane groove 13, and the two ends of the second channel H2 are respectively connected to the first channel H1 and the third channel H3.

[0027] The lower cylinder 3 includes a lower cylinder body and a fourth channel H4 disposed in the lower cylinder body. The interior of the lower cylinder body forms a lower compression chamber C2. One end of the fourth channel H4 is connected to the third channel H3, and the other end is connected to the lower compression chamber C2.

[0028] In this invention, a first oblique cut 12 is provided on the side wall at the connection between the second channel H2 and the first channel H1, and a second oblique cut 21 is formed on the side wall at the connection between the third channel H3 and the fourth channel H4. In one embodiment of this invention, the suction channel structure of the dual-cylinder rolling rotor compressor is a single suction channel structure. This single suction channel structure includes a first and second channel of the lower cylinder, a third channel of the intermediate plate, and a fourth channel of the lower cylinder, all connected to each other. (See...) Figure 1 As shown by the dashed arrow, the cold air enters the suction chamber of the lower cylinder through the suction air passage from the liquid reservoir suction pipe. An oblique cut is added near the liquid reservoir at the connection between the second and first channels of the upper cylinder, and an oblique cut is added near the compression chamber of the lower cylinder in the third channel of the intermediate plate. This expands the suction air passage and optimizes the airflow path, reduces flow resistance and suction resistance, thereby improving suction efficiency.

[0029] The first oblique cut 12 of the upper cylinder 1 can be formed by machining a hole. The first oblique cut 12 can be planar. It is formed by oblique cutting with a planar tool. The first oblique cut 12 can also be arc-shaped (e.g., Figure 2 As shown in the figure, it can be obtained through a chamfering process. The chamfering involves tilting the surface at a certain angle. In this case, the size of the first oblique cut 12 is related to the diameter of the tool used; the diameter of the tool should be smaller than the diameter of the second channel H2. Preferably, the angle between the first oblique cut 12 and the end face of the upper cylinder 11 is θ. Figure 1 The following conditions must be met: 30°≤θ≤65°, such as the included angle θ being 30°, 45°, or 60°. In some embodiments, with the axis of the second channel as the center, the central angles corresponding to the two ends of the first oblique cut 12, i.e., the circumferential unfolding angle of the first oblique cut 12, are between 60° and 135°. Preferably, the first oblique cut 12 is located on the side of the top of the second channel away from the upper compression cavity C1.

[0030] The second oblique cut 21 of the intermediate plate 2 can be formed by machining or die casting. The included angle between the second oblique cut 21 and the end face of the intermediate plate 2 is β, see... Figure 2The following conditions must be met: 30°≤β≤65°, such as the included angle β being 30°, 45°, or 60°. In some embodiments, with the axis of the third channel H3 as the center, the central angles corresponding to the two ends of the second oblique cut 21 are between 60° and 135°, that is, the circumferential unfolding angle of the second oblique cut 21 is between 60° and 135°. Preferably, the second oblique cut 21 is disposed at the bottom end of the third channel on the side near the lower compression chamber C2.

[0031] In some embodiments, the fourth channel H4 is an oblique through-hole cut into the inner wall of the lower cylinder 3. The angle between the axis of the gas through the oblique through-hole and the end face of the lower cylinder is α, satisfying: 30°≤α≤65°. The angle between the second oblique cut 21 and the end face of the intermediate plate 2 is β, satisfying: α=β. That is, the fourth channel H4 is set parallel to the second oblique cut 21. At this time, the refrigerant flows directly into the oblique through-hole of the lower cylinder 3 through the third channel H3 of the intermediate plate 2, and finally flows into the suction chamber of the lower cylinder 3. The oblique through-hole of the fourth channel H4 can reduce the suction line to the shortest possible length, optimize the gas flow path, and reduce suction resistance.

[0032] This utility model also provides a compressor, which is a dual-cylinder rolling rotor compressor, including the above-mentioned suction channel structure. Of course, the compressor also includes an upper cylinder cover disposed on the side of the upper cylinder away from the middle plate, a lower cylinder cover disposed on the side of the lower cylinder away from the middle plate, and crankshaft and other components, which will not be described in detail here.

[0033] According to computational fluid dynamics (CFD) simulation results, compared to a twin-cylinder compressor without the first and second oblique cuts, the compressor of this invention improves energy efficiency by 0.07%-0.417% under various test conditions. Meanwhile, the compressor's annual performance factor (APF) test shows an energy efficiency improvement of 0.35%. Furthermore, when the compressor of this invention is applied to an air conditioning system, the air conditioning system's annual performance factor (APF) also improves by 0.36%.

[0034] In summary, the dual-cylinder rolling rotor compressor of this utility model is equipped with a single suction flow channel structure. This single suction flow channel structure can reduce flow resistance, thereby reducing the suction resistance of the compressor, and thus improving the suction efficiency and overall energy efficiency of the compressor.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0036] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A suction flow channel structure for a dual-cylinder rolling rotor compressor, characterized in that, The air intake channel structure includes an upper cylinder, an intermediate plate, and a lower cylinder arranged sequentially along the axial direction. The upper cylinder includes an upper cylinder body and a first channel and a second channel disposed in the upper cylinder body, and an upper compression chamber is formed inside the upper cylinder body; The intermediate plate is provided with a third channel that extends through its thickness; The lower cylinder includes a lower cylinder body and a fourth channel disposed in the lower cylinder body. The interior of the lower cylinder body forms a lower compression chamber. One end of the fourth channel is connected to the third channel, and the other end is connected to the lower compression chamber. One end of the first channel forms an air intake that communicates with the outside, and the other end communicates with the upper compression chamber. The two ends of the second channel are respectively connected to the first channel and the third channel. A first oblique cut is provided on the side wall at the connection between the second channel and the first channel; A second oblique cut is formed on the sidewall at the junction of the third channel and the fourth channel.

2. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, The angle between the first oblique cut and the end face of the upper cylinder is θ, which satisfies: 30°≤θ≤65°.

3. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, The angle between the second oblique cut and the end face of the intermediate plate is β, which satisfies: 30°≤β≤65°.

4. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, With the axis of the second channel as the center, the central angles corresponding to the two ends of the first oblique cut are between 60° and 135°.

5. The suction channel structure of the dual-cylinder rolling rotor compressor according to claim 4, characterized in that, The first oblique cut is located on the side away from the upper compression chamber.

6. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, With the axis of the third channel as the center, the central angles corresponding to the two ends of the second oblique cut are between 60° and 135°.

7. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 6, characterized in that, The second oblique cut is located on the side close to the lower compression chamber.

8. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, The fourth channel is an oblique through hole cut into the inner wall of the lower cylinder. The angle between the axis of the air through the oblique through hole and the end face of the lower cylinder is α, which satisfies: 30°≤α≤65°.

9. The suction flow channel structure of the dual-cylinder rolling rotor compressor according to claim 1, characterized in that, The fourth channel is an oblique through hole cut into the inner wall of the lower cylinder, and the angle between the axis of the air through the oblique through hole and the upper end face of the lower cylinder is α. The angle between the second oblique cut and the end face of the intermediate plate is β, which satisfies: α=β.

10. A compressor, characterized in that, The compressor is a dual-cylinder rolling rotor compressor, including the suction channel structure as described in any one of claims 1 to 9.

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