Air cylinder, pump body assembly and compressor

Abstract

The utility model provides an air cylinder, a pump body assembly and a compressor. The air cylinder comprises an air cylinder body, an exhaust port is formed in the air cylinder body, the axial section of the exhaust port extends to the first end face of the air cylinder body from the inner wall of the air cylinder body in a gradually-expanding streamline curve mode, and the inner wall face of the exhaust port is an arc face. The diameter of a first opening, close to the first end face, of the exhaust port is larger than that of a second opening, away from the first end face, of the exhaust port. Through the gradually-expanded streamline structural design of the exhaust port, the clearance volume of the compressor can be reduced, the effective flow area of the exhaust port can be increased, the energy consumption of the compressor is further reduced, the working efficiency of the compressor is improved, and the exhaust resistance and the compression loss of the compressor are reduced; according to the compressor, the inner wall face of the exhaust port is arranged to be the arc face, the flowing smoothness of airflow during exhausting is improved, airflow pulsation caused by unsmooth exhausting during exhausting of the compressor is reduced, and the working noise of the compressor is lowered.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a cylinder, pump body assembly, and compressor. Background Technology

[0002] The cylinder is the core component of a rolling rotor compressor. In existing compressors, a portion of the exhaust housing is typically blocked by the cylinder, and some of the compressed gas needs to exit the compression chamber through the cylinder's exhaust port to reduce exhaust resistance. However, due to manufacturing processes, this exhaust port is often too large, resulting in an excessively large exhaust clearance volume. This affects the compressor's cooling capacity, increases energy consumption, and reduces its efficiency.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of this utility model is to provide a cylinder, pump body assembly and compressor to improve the problem of excessive clearance volume during exhaust, reduce the energy consumption of the compressor and improve the working efficiency of the compressor.

[0005] This utility model provides a cylinder, including a cylinder body, on which an exhaust port is provided. The axial section of the exhaust port extends from the inner wall of the cylinder body in a gradually expanding streamlined curve to the first end face of the cylinder body. The inner wall surface of the exhaust port is an arc surface. The first opening diameter of the exhaust port near the first end face is larger than the second opening diameter of the exhaust port away from the first end face.

[0006] In some embodiments, the height of the exhaust port in the axial direction of the cylinder body is H, which satisfies: H≥3mm.

[0007] In some embodiments, the diameter of the first opening of the exhaust port near the first end face is 5mm to 10mm.

[0008] In some embodiments, the exhaust port has a symmetrical structure.

[0009] In some embodiments, the exhaust port extends in a direction parallel to the axial direction of the cylinder body.

[0010] In some embodiments, the opening of the exhaust port gradually increases from the inner wall of the cylinder body to the first end face of the cylinder body.

[0011] In some embodiments, the exhaust port is a conical structure, and both ends of the conical structure are circular arc structures.

[0012] In some embodiments, the inner wall surface of the exhaust port is an arc surface that is axially concave towards the center of the exhaust port.

[0013] This utility model embodiment also provides a pump body assembly, including a cylinder as described in any of the preceding claims.

[0014] This utility model embodiment also provides a compressor, including the pump body assembly as described above.

[0015] The cylinder, pump assembly, and compressor provided by this utility model have the following advantages:

[0016] This invention reduces the clearance volume of the compressor and increases the effective flow area of ​​the exhaust port by setting the first opening diameter of the exhaust port to be larger than the second opening diameter, thereby reducing the energy consumption of the compressor, improving the working efficiency of the compressor, and reducing the exhaust resistance and compression loss of the compressor. By setting the inner wall surface of the exhaust port to be an arc surface, the smoothness of airflow during exhaust is improved, thereby reducing the airflow pulsation caused by poor exhaust during compressor exhaust and reducing the working noise of the compressor. 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 structure of a cylinder according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional schematic diagram of the exhaust port portion of a cylinder according to an embodiment of the present invention.

[0020] Figure label:

[0021] 100 cylinder body

[0022] 10 Exhaust Port Detailed Implementation

[0023] 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, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0024] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0025] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0027] Clearance volume refers to the minimum remaining space in the cylinder when the piston reaches top dead center. This space cannot be completely eliminated, resulting in some compressed gas remaining in each compressor cycle. Clearance volume is formed because a safe clearance must be maintained between the piston and cylinder head to avoid collision; the installation position and shape of the intake and exhaust valves leave a certain amount of space; and space is reserved for thermal expansion of materials to prevent damage to components due to temperature increases.

[0028] The presence of clearance volume causes residual high-pressure gas to expand during the piston's return stroke, occupying part of the cylinder volume and reducing the intake of uncompressed gas. The expanded gas requires additional compression, leading to energy loss. Furthermore, repeated compression of the residual gas can cause localized overheating, affecting lubrication and material lifespan. Therefore, excessive clearance volume can affect the compressor's cooling capacity, increase energy consumption, and reduce compressor efficiency.

[0029] To address the problems in the prior art, this utility model provides a cylinder, including a cylinder body with an exhaust port. The axial section of the exhaust port extends from the inner wall of the cylinder body in a gradually expanding streamlined curve to a first end face of the cylinder body. The inner wall surface of the exhaust port is arc-shaped, and the first opening diameter of the exhaust port near the first end face is larger than the second opening diameter of the exhaust port away from the first end face. In this technical solution, by setting the first opening diameter of the exhaust port to be larger than its second opening diameter, the clearance volume of the compressor can be reduced, the effective flow area of ​​the exhaust port can be increased, thereby reducing the energy consumption of the compressor, improving the working efficiency of the compressor, and reducing the exhaust resistance and compression loss of the compressor. By setting the inner wall surface of the exhaust port to be arc-shaped, the smoothness of airflow during exhaust is improved, thereby reducing airflow pulsation caused by poor exhaust during compressor exhaust and reducing the operating noise of the compressor.

[0030] The cylinder provided in the embodiments of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments shown are not intended to limit the scope of protection of this utility model.

[0031] like Figure 1 and Figure 2 As shown, the cylinder includes a cylinder body 100, on which an exhaust port 10 is provided. The exhaust port 10 extends from the inner wall of the cylinder body 100 to the first end face of the cylinder body 100. The inner wall surface of the exhaust port 10 is an arc surface, and the diameter of the first opening of the exhaust port 10 near the first end face is larger than the diameter of the second opening of the exhaust port away from the first end face. Figure 1 and Figure 2 From the perspective of the cylinder body 100, the first end face is the upper end face, the first opening of the exhaust port 10 near the first end face is the top opening, and the second opening of the exhaust port 10 away from the first end face is the bottom opening.

[0032] By setting the exhaust port so that its first opening diameter is larger than its second opening diameter, the clearance volume of the compressor can be reduced, the effective flow area of ​​the exhaust port can be increased, thereby reducing the energy consumption of the compressor, improving the working efficiency of the compressor, and reducing the exhaust resistance and compression loss of the compressor. By setting the inner wall surface of the exhaust port to be curved, the smoothness of airflow during exhaust can be improved, thereby reducing the airflow pulsation caused by poor exhaust during compressor exhaust and reducing the working noise of the compressor.

[0033] Specifically, the exhaust port is divided into a guide section, a concave guide section, and a flared exhaust section from the inner wall of the cylinder body to the first end face of the cylinder body. The guide section is cylindrical, smoothly expanding to the concave guide section. The concave guide section is an arc surface with the inner wall of the exhaust port recessed axially towards the center of the exhaust port. The flared exhaust section is an arc surface with the inner wall of the exhaust port expanding axially outward away from the center of the exhaust port. The guide section guides the gas in the cylinder to the concave guide section, and the gas is then exhausted from the flared exhaust section. The axial section of the exhaust port is streamlined, meaning that the exhaust port from the guide section, the concave guide section to the flared exhaust section is a single arc surface, thereby minimizing exhaust resistance and airflow pulsation while keeping the exhaust clearance volume as small as possible.

[0034] Specifically, the exhaust port 10 of the cylinder can be designed with a smaller bottom and a larger top. This can be achieved by machining the cylinder body 100, i.e., machining the first end face of the cylinder body 100 after it has been formed. Alternatively, it can be directly cast, i.e., by setting an insert of a corresponding size in the mold of the cylinder body 100 at the position corresponding to the exhaust port 10, and then integrally casting the cylinder body 100 with the exhaust port 10.

[0035] Furthermore, in some embodiments, the exhaust port 10 is located in the axial direction of the cylinder body 100 ( Figure 2 The height of the exhaust port 10 (in the vertical direction) is H, which satisfies: H≥3mm. The exhaust port 10 provided in this embodiment can significantly reduce the clearance volume of the cylinder; at the same depth, it can reduce the clearance volume by approximately 65%, thus effectively helping to increase the cooling capacity and improve the compressor's working efficiency. To achieve a good clearance reduction effect, the height of the exhaust port 10 does not need to be too large, avoiding the impact of an excessively deep exhaust port 10 on the structural strength of the cylinder body 100. However, to achieve an even higher clearance reduction effect, the height of the exhaust port 10 can be further increased as needed.

[0036] Furthermore, in some embodiments, the diameter of the first opening of the exhaust port 10 near the first end face is 5mm to 10mm. The larger diameter of the first opening of the exhaust port 10 than its second opening diameter increases the flow area of ​​compressed gas towards the valve plate, thereby reducing the impact of the valve plate on the baffle, lowering the probability of valve plate breakage, and improving the reliability of the compressor.

[0037] Furthermore, in some embodiments, the exhaust port 10 has a symmetrical structure, specifically, it is symmetrical about the center line along the axial direction of the exhaust port 10, which ensures the stability and smoothness of the gas flow through the exhaust section when the cylinder is venting.

[0038] Furthermore, in some embodiments, the extension direction of the exhaust port 10 is parallel to the axial direction of the cylinder body 100. This ensures smooth gas discharge, reduces compressor exhaust resistance and overcompression losses, lowers compressor energy consumption, and improves compressor efficiency.

[0039] Optionally, the opening of the exhaust port 10 gradually increases from the inner wall of the cylinder body 100 to the first end face of the cylinder body 100, reducing the clearance volume. A smooth transition is formed on the side wall of the exhaust port 10 from bottom to top, which increases the flow area during exhaust, increases the cooling capacity of the compressor, improves the working efficiency of the compressor, and makes the gas flow smoother by providing a smooth transition inner wall.

[0040] Furthermore, such as Figure 1 and Figure 2 As shown, the exhaust port 10 has a conical structure with rounded ends. The rounded ends improve the smoothness of exhaust flow, reduce pressure loss, and increase exhaust efficiency.

[0041] Furthermore, in some embodiments, the inner wall surface of the exhaust port 10 is an arc surface that is axially concave towards the center of the exhaust port 10. The arc surface can provide good guidance for the discharged compressed gas, improve exhaust flow, reduce exhaust resistance and overcompression loss, reduce compressor energy consumption, and improve compressor working efficiency.

[0042] This utility model embodiment also provides a pump body assembly, including the cylinder described above. This pump body assembly achieves all the technical effects of the aforementioned cylinder. By setting the exhaust port so that its first opening diameter is smaller than its second opening diameter, the clearance volume of the compressor can be reduced, the effective flow area of ​​the exhaust port can be increased, thereby reducing the compressor's energy consumption, improving the compressor's working efficiency, and reducing the compressor's exhaust resistance and compression loss. By setting the inner wall surface of the exhaust port to an arc surface, the smoothness of airflow during exhaust is improved, thereby reducing airflow pulsation caused by poor exhaust during compressor exhaust and reducing the compressor's operating noise.

[0043] This utility model embodiment also provides a compressor, including the pump body assembly described above. This compressor achieves all the technical effects of the aforementioned pump body assembly, which will not be elaborated further here.

[0044] In summary, the cylinder, pump assembly, and compressor provided by this utility model have the following advantages:

[0045] This invention reduces the clearance volume of the compressor and increases the effective flow area of ​​the exhaust port by setting the first opening diameter of the exhaust port to be smaller than the second opening diameter, thereby reducing the energy consumption of the compressor, improving the working efficiency of the compressor, and reducing the exhaust resistance and compression loss of the compressor. By setting the inner wall surface of the exhaust port to be an arc surface, the smoothness of airflow during exhaust is improved, thereby reducing the airflow pulsation caused by poor exhaust during compressor exhaust and reducing the working noise of the compressor.

[0046] 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 gas cylinder characterized by, The exhaust port is symmetrically structured.

2. The air cylinder of claim 1, wherein The extension direction of the exhaust port is parallel to the axial direction of the cylinder body.

3. The air cylinder of claim 1, wherein, The opening of the exhaust port gradually increases from the inner wall of the cylinder body to the first end face of the cylinder body.

4. The air cylinder of claim 1, wherein, The exhaust port is a conical structure, and both ends of the conical structure are circular arcs.

5. The air cylinder of claim 1, wherein, The inner wall surface of the exhaust port is an arc surface that is concave inward toward the central axis of the exhaust port.

6. The air cylinder of claim 1, wherein, The pump body assembly comprises the cylinder as claimed in any one of claims 1 to 8.

7. The air cylinder of claim 6, wherein, The pump body assembly comprises the cylinder as claimed in any one of claims 1 to 8.

8. The air cylinder of claim 1 or 7, wherein, ​ 9. A pump body assembly characterized by, ​ 10. A compressor characterized by, ​

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