Cylinder structure, compressor pump body and compressor

Abstract

The invention belongs to the technical field of compressors, and discloses an air cylinder structure, a compressor pump body and a compressor. A cylinder cavity is formed in the center of the cylinder body; an air suction opening is formed in the air cylinder wall of the air cylinder body and penetrates through the air cylinder wall of the air cylinder body in the radial direction. The air cylinder body is further provided with a flow expanding hole, and the central projection of the flow expanding hole is located on the central axis of the air suction port. One end of the flow expanding hole is communicated with the air suction port, and the other end of the flow expanding hole is communicated with the axial end face of the air cylinder body. The flow expanding hole is communicated with the air suction port, flow expanding is achieved when air flows through the flow expanding hole by expanding the airflow channel, the effect of effectively reducing airflow resistance and flow velocity is achieved, the purpose of noise reduction is achieved, and the stability and reliability of the air cylinder are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a cylinder structure, a compressor pump body and a compressor. Background Art

[0002] In a rotary compressor, gas enters the cylinder through the intake port, and as the piston or rotor inside the cylinder rotates, the gas is compressed and pushed toward the exhaust port. The size of the intake port directly affects the suction capacity and efficiency of the compressor. If the intake port is too small, the gas flow rate will be restricted, resulting in reduced compressor efficiency. If the intake port is too large, the air flow resistance and noise will increase. For example, the existing rotary compressors generally use an intake port structure with a straight hole or a tapered hole, which has a large air flow resistance and air flow noise during operation, thereby greatly increasing the operating noise. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a cylinder structure, a compressor pump body and a compressor to solve the technical problem that the air intake structure of the existing rotor compressor generally adopts a straight hole or a tapered hole, and its airflow resistance and airflow noise are large during operation, thereby greatly increasing the operating noise of the compressor.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a cylinder structure, comprising a cylinder body; A cylinder cavity is provided at the center of the cylinder body; an air intake port is provided on the cylinder wall of the cylinder body, and the air intake port radially penetrates the cylinder wall of the cylinder body; The cylinder body is also provided with a flow expansion hole, the central projection of which is located on the central axis of the air intake port; one end of the flow expansion hole is connected to the air intake port, and the other end of the flow expansion hole is connected to the axial end face of the cylinder body.

[0005] Furthermore, the expansion hole is a circular hole, and a diameter D2 of the expansion hole is smaller than a diameter D1 of the air inlet.

[0006] Furthermore, there is one expansion hole, and the expansion hole is arranged close to the main bearing side of the compressor; specifically, one end of the expansion hole is connected to the air intake port, and the other end of the expansion hole is connected to the upper end surface of the cylinder body.

[0007] Furthermore, there is one expansion hole, and the expansion hole is arranged close to the side of the secondary bearing of the compressor; specifically, one end of the expansion hole is connected to the air intake port, and the other end of the expansion hole is connected to the lower end surface of the cylinder body.

[0008] Furthermore, there are two expansion holes, which are symmetrically arranged on both sides of the air intake port; wherein one end of the first expansion hole is connected to the first side wall of the air intake port, and the other end of the first expansion hole is connected to the upper end surface of the cylinder body; one end of the second expansion hole is connected to the second side wall of the air intake port, and the other end of the second expansion hole is connected to the lower end surface of the cylinder body.

[0009] Furthermore, the air intake port includes an axially penetrating equal-diameter hole section and a gradually expanding hole section; one end of the equal-diameter hole section is connected to the outer surface of the cylinder wall of the cylinder body, the other end of the equal-diameter hole section is connected to the small-mouth end of the gradually expanding hole section, and the large-mouth end of the gradually expanding hole section is connected to the wall surface of the cylinder cavity.

[0010] Furthermore, the expansion hole is located at the connection between the equal-diameter hole section and the gradually expanding hole section.

[0011] The present invention also provides a compressor pump body, which includes the cylinder structure.

[0012] The present invention also provides a compressor, which includes the cylinder structure or the compressor pump body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a cylinder structure, which adopts a flow expansion hole arranged on the cylinder body, and the flow expansion hole is connected with the air intake port, so that the gas can expand when flowing through the flow expansion hole by expanding the airflow channel, which effectively reduces the airflow resistance and flow velocity, thereby achieving the purpose of noise reduction and improving the stability and reliability of the cylinder; at the same time, the center projection of the flow expansion hole is arranged to be located on the central axis of the air intake port, which can ensure the linearity of the airflow path, reduce the friction and collision of the airflow on the cylinder wall, thereby reducing energy loss and improving the working efficiency of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structural diagram of the cylinder structure provided in Example 1; Figure 2 for Figure 1 Sectional view at AA in the middle; Figure 3 A partial cross-sectional view of the cylinder structure provided in Example 2; Figure 4 A partial cross-sectional view of the cylinder structure provided for Example 3.

[0015] Among them, 1 is a cylinder body; 11 is a cylinder cavity, 12 is an air intake port, 13 is a flow expansion hole, and 14 is a sliding vane groove. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Example 1 As attached Figure 1-2 As shown, this embodiment 1 provides a cylinder structure, including a cylinder body 1; a cylinder cavity 11 is arranged at the center of the cylinder body 1, and the cylinder cavity 11 is used as the main area where gas is compressed and stored; an air intake port 12 is arranged on the cylinder wall of the cylinder body 1, and the air intake port 12 is used as a channel for gas to enter the cylinder cavity 11; wherein, the air intake port 12 radially penetrates the cylinder wall of the cylinder body 1; specifically, the center of the air intake port 12 coincides with the diameter direction of the cylinder body 1, one end of the air intake port 12 is communicated with the outer surface of the cylinder wall of the cylinder body 1, and the other end of the air intake port 12 is communicated with the wall surface of the cylinder cavity 11.

[0018] The cylinder body 1 is also provided with a flow expansion hole 13, and the central projection of the flow expansion hole 13 is located on the central axis of the air intake port 12; wherein, the number of the flow expansion holes 13 is two, and the two flow expansion holes 13 are symmetrically arranged on both sides of the central axis of the air intake port 12; specifically, one end of the first flow expansion hole is connected to the first side wall of the air intake port 12, and the other end of the first flow expansion hole is connected to the upper end surface of the cylinder body 1; one end of the second flow expansion hole is connected to the second side wall of the air intake port 12, and the other end of the second flow expansion hole is connected to the lower end surface of the cylinder body 1.

[0019] It should be noted that the upper end face of the cylinder body 1 is the end face that matches the main bearing in the compressor, and the lower end face of the cylinder body 1 is the end face that matches the secondary bearing in the compressor; the first side wall of the air intake port 12 is the inner wall close to the upper end face of the cylinder body 1, and the second side wall of the air intake port 12 is the inner wall close to the lower end face of the cylinder body 1.

[0020] In this embodiment 1, the air intake port 12 includes an axially penetrating equal-diameter hole section and a gradually expanding hole section; one end of the equal-diameter hole section is connected to the outer surface of the cylinder wall of the cylinder body 1, and the other end of the equal-diameter hole section is connected to the small-mouth end of the gradually expanding hole section, and the large-mouth end of the gradually expanding hole section is connected to the wall surface of the cylinder cavity; wherein the expansion hole 13 is located at the connection between the clear hole section and the gradually expanding hole section.

[0021] The expansion hole 13 is a circular hole, which is conducive to the uniform distribution of airflow and the reduction of airflow resistance; the diameter D2 of the expansion hole 13 is smaller than the diameter D1 of the air intake port 12, which can ensure that the air intake port 12 serves as the main channel for the gas to enter the cylinder cavity while realizing the expansion of the gas, effectively ensuring the air intake efficiency of the cylinder.

[0022] It should also be noted that a vane groove 14 is also provided on the cylinder body 1; a vane assembly is provided in the vane groove 14 to divide the cylinder cavity 11 into an intake cavity and a compression cavity; the intake port 12 and the expansion hole 13 are located on the same side of the vane groove 14, thereby ensuring the compactness and simplicity of the cylinder structure.

[0023] Working principle: The cylinder structure provided in this embodiment 1 is provided with a flow expansion hole 13 on the cylinder body 1, and the flow expansion hole 13 with a circular cross-section is connected with the air intake port 12. During the air intake process of the compressor, based on the principle of fluid mechanics, a flow expansion phenomenon occurs when the gas flows through the flow expansion hole 13, so that the flow velocity of the gas is reduced, thereby reducing the air flow noise, thereby greatly reducing the operating noise of the compressor and ensuring the reliability and safety of the compressor.

[0024] Example 2 The structure and principle of the cylinder structure provided in this embodiment 2 are basically the same as those provided in the above embodiment 1, except that: the number of the expansion hole 13 is one, as shown in the attached Figure 3 shown.

[0025] When the number of the expansion hole 13 is one, the expansion hole 13 is arranged close to the main bearing side of the compressor; specifically, one end of the expansion hole 13 is connected to the intake port 12, and the other end of the expansion hole 13 is connected to the upper end surface of the cylinder body 1.

[0026] The remaining structural features and working principles of the cylinder structure are basically the same as those of the cylinder structure of the above-mentioned embodiment 1, and will not be repeated here.

[0027] Example 3 The structure and principle of the cylinder structure provided in this embodiment 3 are basically the same as those provided in the above embodiment 1, except that: the number of the expansion hole 13 is one, as shown in the attached Figure 4 shown.

[0028] When the number of the expansion hole 13 is one, the expansion hole 13 is arranged close to the side of the secondary bearing of the compressor; specifically, one end of the expansion hole 13 is connected to the intake port 12, and the other end of the expansion hole 13 is connected to the lower end surface of the cylinder body 1.

[0029] The remaining structural features and working principles of the cylinder structure are basically the same as those of the cylinder structure of the above-mentioned embodiment 1, and will not be repeated here.

[0030] Example 4 This embodiment 4 provides a compressor pump body, including a main bearing, a secondary bearing, a rotor piston, a crankshaft and a cylinder.

[0031] The main bearing and the secondary bearing are respectively arranged on both sides of the cylinder; the rotor piston is arranged in the cylinder; the secondary bearing is matched with the short shaft diameter of the crankshaft, the main bearing is matched with the long shaft diameter of the crankshaft, and the rotor piston is matched with the eccentric shaft diameter of the crankshaft; wherein the cylinder adopts the cylinder structure as described in any one of the above embodiments 1, 2 or 3.

[0032] It should be noted that the assembly principle and process between the main bearing, the secondary bearing, the rotor piston, the crankshaft and the cylinder are similar to those of the existing compressor pump body and will not be repeated here; in addition, the compressor pump body described in this embodiment 4 is suitable for compressors with different operating conditions, different application scenarios and different displacements; among which, different application scenarios include: air conditioning and refrigeration, heat pump heating or refrigeration.

[0033] Example 5 This embodiment 5 provides a compressor, including a pump body, a motor assembly and a casing; the pump body adopts the compressor pump body described in the above embodiment 4; the pump body and the motor assembly are both assembled in the casing, and the motor assembly is connected to the crankshaft in the pump body.

[0034] In the cylinder structure of the compression pump body, when the gas enters quickly from the air intake port 12, its flow rate is relatively fast, and turbulence and eddy currents are easily generated inside the cylinder. The unstable airflow will cause the airflow sound to increase, thereby generating noise. The cylinder structure described in the present invention utilizes the principles of fluid mechanics by providing an expansion hole 13 that penetrates the air intake port. When the gas flows through the expansion hole 13, the flow rate of the gas will naturally decrease due to the expansion of the hole, and the airflow will become smoother. Secondly, the reduction in gas flow rate and the stabilization of the airflow help to reduce the friction and collision between the airflow and the cylinder wall, thereby reducing the noise generated by unstable airflow.

[0035] In the present invention, through the design of the expansion hole, the gas is first expanded and decelerated before entering the cylinder cavity, which significantly reduces the size of the air flow noise, so that the noise level of the entire compression pump body during operation is effectively controlled; the reduction in noise not only improves the user experience, but also helps to reduce the impact of noise pollution on the surrounding environment; the overall structure of the present invention is simple, which not only improves the overall performance of the compression pump body, but also makes it more environmentally friendly and humane, meeting the requirements of modern industry for low noise and high efficiency equipment.

[0036] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A cylinder structure, characterized in that: It includes a cylinder body (1); A cylinder cavity (11) is provided at the center of the cylinder body (1); an air intake port (12) is provided on the cylinder wall of the cylinder body (1), and the air intake port (12) radially penetrates the cylinder wall of the cylinder body (1); The cylinder body (1) is also provided with a flow expansion hole (13), the central projection of the flow expansion hole (13) being located on the central axis of the air intake port (12); one end of the flow expansion hole (13) is connected to the air intake port, and the other end of the flow expansion hole (13) is connected to the axial end face of the cylinder body (1).

2. A cylinder structure according to claim 1, characterized in that: The expansion hole (13) is a circular hole, and the diameter D2 of the expansion hole (13) is smaller than the diameter D1 of the air inlet (12).

3. A cylinder structure according to claim 1, characterized in that: The number of the expansion hole (13) is one, and the expansion hole (13) is arranged close to a main bearing side of the compressor; specifically, one end of the expansion hole (13) is connected to the air intake port (12), and the other end of the expansion hole (13) is connected to the upper end surface of the cylinder body (1).

4. A cylinder structure according to claim 1, characterized in that: The number of the expansion hole (13) is one, and the expansion hole (13) is arranged close to one side of the auxiliary bearing of the compressor; specifically, one end of the expansion hole (13) is connected to the air intake port (12), and the other end of the expansion hole (13) is connected to the lower end surface of the cylinder body (1).

5. A cylinder structure according to claim 1, characterized in that: The number of the expansion holes (13) is two, and the two expansion holes (13) are symmetrically arranged on both sides of the air intake port (12); wherein one end of the first expansion hole is connected to the first side wall of the air intake port (12), and the other end of the first expansion hole is connected to the upper end surface of the cylinder body (1); one end of the second expansion hole is connected to the second side wall of the air intake port (12), and the other end of the second expansion hole is connected to the lower end surface of the cylinder body (1).

6. A cylinder structure according to claim 1, characterized in that: The air intake port (12) comprises an axially penetrating equal-diameter hole section and a gradually expanding hole section; one end of the equal-diameter hole section penetrates the outer surface of the cylinder wall of the cylinder body (1), the other end of the equal-diameter hole section is connected to the small-mouth end of the gradually expanding hole section, and the large-mouth end of the gradually expanding hole section penetrates the wall surface of the cylinder cavity.

7. A cylinder structure according to claim 6, characterized in that: The expansion hole (13) is located at the connection between the equal-diameter hole section and the gradually expanding hole section.

8. A compressor pump body, characterized in that: The compressor pump body comprises a cylinder structure as described in any one of claims 1-7.

9. A compressor, characterized in that: The compressor comprises the cylinder structure as described in any one of claims 1 to 7, or comprises the compressor pump body as described in claim 8.

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