Air compressor

Abstract

The utility model discloses an air compressor which comprises a shell, a cooling fan, a cylinder sleeve and a cylinder cover. The shell is provided with a containing cavity, and the cooling fan is installed in the containing cavity and introduces cooling airflow. The cylinder sleeve is provided with a flow guide air channel extending in the height direction of the shell, and the air channel communicates with the containing cavity to receive cooling airflow. The cylinder cover comprises a cover body, cooling fins and a flow guide wall, the cover body is connected to the upper portion of the cylinder sleeve, the cooling fins are arranged on the top of the cover body, and the flow guide wall is located between the cooling fins and the cover body; the cover body is provided with an air outlet communicated with the flow guide air channel, and the flow guide wall guides cooling airflow in the air channel to the surfaces of the cooling fins. Air flow generated by the cooling fan is introduced into the cylinder cover through the flow guide air channel, the air flow is directionally guided to the cooling fins through the flow guide wall, cooperative heat dissipation of the cooling air flow and the cooling fins is achieved, the heat dissipation efficiency of the cylinder cover is remarkably improved, and device aging caused by heat concentration is prevented; sundries are effectively prevented from entering the air duct.

Description

Technical Field

[0001] This utility model relates to the field of gas compression technology, and in particular to an air compressor. Background Technology

[0002] An air compressor is a device used to compress gas, and it has a wide range of applications. Examples include pneumatic tools, pneumatic wrenches, jet looms, oil well fracturing, tire inflation, and painting.

[0003] During operation, air typically enters the compression chamber from the cylinder head, and the compressed air also flows out from the cylinder head and is stored. Because compressed air has significant energy, and due to piston friction and air friction, the cylinder head of the air compressor generates heat, leading to the aging of internal components and reducing the compressor's performance and lifespan. Utility Model Content

[0004] The purpose of this invention is to provide an air compressor that can improve heat dissipation efficiency and extend the service life of the air compressor.

[0005] To solve the above-mentioned technical problems, the present invention provides an air compressor, including a housing, a cooling fan rotatably disposed within the housing, a cylinder liner connected to the housing, and a cylinder head connected to the cylinder liner. The housing has a receiving chamber, and the cooling fan is disposed in the receiving chamber and introduces cooling airflow into the receiving chamber. The cylinder liner has a guide air duct extending along the height direction of the housing, the guide air duct communicating with the receiving chamber, and the guide air duct receiving the cooling airflow. The cylinder head includes a cover body, a heat sink, and a guide wall. The cover body is connected above the cylinder liner along the height direction of the housing, the heat sink is disposed above the cover body along the height direction of the housing, and the guide wall is located between the heat sink and the cover body. The cover body has an air outlet corresponding to and communicating with the guide air duct, and the guide wall guides the airflow in the guide air duct to the outer surface of the heat sink.

[0006] The air compressor of this embodiment features a cylinder head with an internal airflow duct communicating with the housing. An air outlet communicating with the airflow duct is located on the cylinder head, and a guide wall is installed at the air outlet. This guide wall directs the cooling airflow from the airflow duct to a heat sink located above the cylinder head. This allows the cooling airflow generated by the internal cooling fan to simultaneously dissipate heat from the cylinder head, fully utilizing the cooling fan and heat sink to improve cooling efficiency. This prevents heat accumulation during operation, avoids or slows down the aging of internal components, and extends the compressor's lifespan. Furthermore, the guide wall, positioned opposite the air outlet, provides some protection against external debris and foreign objects entering the airflow duct and compressor interior. This prevents blockage of the airflow duct, which could affect cooling efficiency, and also prevents wear and tear on the compressor's internal components, ensuring its normal operation.

[0007] Optionally, the flow guide wall includes a first wall surface and a second wall surface that are connected to each other. The first wall surface extends along the height direction of the housing, and the second wall surface extends toward the heat sink. The first wall surface and the second wall surface are arranged at an angle, and the angle between the first wall surface and the second wall surface is greater than or equal to 90° and less than or equal to 140°.

[0008] By appropriately setting the angle between the first and second walls of the guide wall, the cooling airflow within the guide duct can be effectively guided to the surface of the heat sink, improving the heat dissipation effect of the heat sink and thus enabling the heat sink to efficiently dissipate heat from the cylinder head. When the angle between the first and second walls is less than 90°, the guide wall exerts significant resistance on the cooling airflow, and some of the cooling airflow exiting the air outlet may flow back into the guide duct, weakening the effective cooling airflow for the heat sink and reducing its cooling effect. When the angle between the first and second walls is greater than 140°, the cooling airflow exiting the air outlet deviates significantly from the heat sink under the guidance of the guide wall, resulting in most of the cooling airflow failing to effectively cool the heat sink, leading to poor heat dissipation and wasted cooling airflow.

[0009] Optionally, the flow guide wall further includes a third wall located between the first wall surface and the second wall surface, the first wall surface being transitionally connected to the second wall surface through the third wall surface, the third wall surface being a curved surface, and the profile of the third wall surface being formed as an arc segment in a cross section parallel to the height direction of the housing.

[0010] By setting a third wall between the first and second walls and constructing the cross-sectional profile of the third wall as an arc segment, the wind resistance of the guide wall to the cooling airflow can be reduced, allowing the cooling airflow to flow more smoothly and maintaining a high flow velocity when the cooling airflow flows out of the guide wall. This can improve the air exchange efficiency of the cooling airflow on the surface of the heat sink, thereby improving the cooling efficiency of the heat sink.

[0011] Optionally, the air compressor further includes a valve plate disposed between the cylinder liner and the cylinder head, the valve plate having a through hole communicating with the receiving chamber; the orthographic projection of the guide wall in the height direction of the housing covers at least a portion of the air outlet.

[0012] By ensuring that the orthogonal projection of the guide wall in the height direction of the casing can cover at least part of the air outlet, the protective effect of the guide wall on the air outlet can be improved, preventing foreign objects from entering the guide air duct and causing blockage. It can also prevent liquids or foreign objects from entering the air compressor and causing damage to the air compressor's internal components, maintaining a normal and clean internal operating environment for the air compressor, and extending the service life of the air compressor.

[0013] Optionally, the edge of the cylinder head is also provided with ventilation holes spaced apart from the air outlet, the ventilation holes penetrating the edge of the cover and communicating with the receiving chamber.

[0014] A ventilation hole is provided at the edge of the cylinder head, spaced apart from the air outlet and connected to the housing chamber. In this way, the cooling airflow drawn into the housing chamber by the cooling fan can be discharged to the outside of the air compressor through the ventilation hole after cooling the internal components of the air compressor. This ensures effective cooling of the internal components of the air compressor and also prevents excessive internal pressure from affecting the normal operation of the air compressor or even damaging the air compressor.

[0015] Optionally, the heat sink is in the shape of a straight plate or a corrugated plate; the edge of the cylinder head is also provided with weight reduction holes spaced apart from the air outlet, and the weight reduction holes are in communication with the receiving chamber.

[0016] Designing the heat sink as a straight plate simplifies the structure, makes it easy to manufacture, and reduces the manufacturing difficulty and cost of the air compressor. Designing the heat sink as a corrugated plate increases the surface area within a straight segment, thereby improving heat dissipation efficiency. Adding weight-reducing holes to the cylinder head edge reduces the weight of the cylinder head, thus reducing the weight of the air compressor and contributing to a lightweight design.

[0017] Optionally, there are multiple heat sinks, which are spaced apart along their own thickness direction. The air outlet and the guide wall both extend along the thickness direction. The guide wall guides the airflow in the guide duct to the gap between the multiple heat sinks. The thickness direction is perpendicular to the height direction of the housing.

[0018] By setting multiple heat sinks and arranging them spaced apart along their thickness, the air contact area of ​​the heat sinks can be increased, thereby improving the cooling efficiency of the cylinder head. The air outlet and the guide wall extend along the thickness of the heat sinks, thereby guiding the cooling airflow in the guide air duct to the gaps between the multiple heat sinks, so that the surfaces of the multiple heat sinks can all contact the cooling airflow, further improving the cooling efficiency of the cylinder head.

[0019] Optionally, a turbulence-inducing tooth is provided between the opposing sidewalls of any two adjacent heat sinks, extending along the length direction of the heat sink, the turbulence-inducing tooth causing turbulence in the airflow between the two adjacent heat sinks; wherein the length direction is perpendicular to the height direction of the housing.

[0020] By setting turbulence teeth, the gap between two heat sinks can be divided into multiple small gas flow channels. By reducing the diameter of the gas flow channels, the flow rate of the cooling gas in the channels can be accelerated, forming turbulence inside the cooling airflow, thereby improving the cooling efficiency of the heat sinks.

[0021] Optionally, the distance between the opposing sidewalls of any two adjacent heat sinks gradually decreases along the airflow direction.

[0022] As the gap between the two heat sinks decreases, the flow rate of the cooling airflow gradually increases. When the flow rate increases to a certain range of Reynolds number, the cooling airflow changes from laminar to turbulent, which can accelerate the heat exchange efficiency inside the cooling airflow and thus improve the cooling efficiency of the cooling airflow on the heat sink.

[0023] Optionally, the air compressor includes a motor installed in the housing, the motor including a motor shaft extending in a horizontal direction; a cooling fan is respectively mounted at both ends of the motor shaft; a cylinder head is arranged directly above each cooling fan along the height direction of the housing, and a guide wall is provided on each cylinder head; the two guide walls are arranged opposite to each other along the axial direction of the motor shaft.

[0024] The motor shaft directly drives the fans at both ends, forming a dual cooling path. This allows cooling airflow to enter simultaneously from both sides, guided by the guide walls, and then concentrated on the heat sinks, achieving balanced heat dissipation for both cylinder heads and preventing heat buildup on one side. Simultaneously, the symmetrical structure simplifies transmission components, reduces energy loss, and improves space utilization, making it suitable for compact designs. The opposing guide walls enhance the impact and contact efficiency of the airflow on the heat sinks, significantly improving cooling efficiency in conjunction with the dual-fan airflow input. Furthermore, the symmetrical load layout at both ends of the motor shaft balances axial forces, reducing operating vibration and noise, and extending motor life. The dual-fan configuration also improves system reliability, maintaining basic cooling function even if one fan fails. This design achieves a harmonious balance of cooling efficiency, structural compactness, and operational stability through structural innovation without increasing energy consumption. It is particularly suitable for air compressors under high-load conditions, ensuring long-term stable operation of the equipment.

[0025] This application has at least the following effective effects:

[0026] The air compressor provided in this application has a cylinder head cover with an internal airflow duct communicating with the housing. An air outlet communicating with the airflow duct is located on the cylinder head cover, and a guide wall is installed at the air outlet. The guide wall directs the cooling airflow within the airflow duct to a heat sink located above the cover, allowing the cooling airflow generated by the internal cooling fan to simultaneously dissipate heat from the cylinder head. This fully utilizes the cooling fan and heat sink, improving the cooling effect on the cylinder head, preventing heat concentration during operation, avoiding or slowing down the aging of internal components, and extending the service life of the air compressor. Simultaneously, because the guide wall is positioned corresponding to the air outlet, it provides some protection to the outlet, preventing external debris and foreign objects from entering the airflow duct and the air compressor interior. This prevents blockage of the airflow duct, which would affect the cooling effect, and also prevents foreign objects from causing wear and tear on the internal components of the air compressor, thus avoiding interference with its normal operation. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a three-dimensional structural schematic diagram of the air compressor in the embodiments of this application;

[0029] Figure 2 yes Figure 1 A top view of the air compressor shown;

[0030] Figure 3 yes Figure 1The diagram shows a side view of the air compressor.

[0031] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the air compressor along the A-A' direction;

[0032] Figure 5 yes Figure 4 Enlarged view of region B in the middle;

[0033] Figure 6 yes Figure 5 Enlarged schematic diagram of region D in the middle;

[0034] Figure 7 yes Figure 1 Enlarged view of region A in the middle;

[0035] Figure 8 This is a schematic diagram of the bottom of the cylinder head in an embodiment of this application;

[0036] Figure 9 This is a top view of a cylinder head with turbulence teeth in an embodiment of this application;

[0037] Figure 10 yes Figure 9 Enlarged schematic diagram of region E in the middle;

[0038] Figure 11 This is a top view of a cylinder head with a reduced diameter protrusion in an embodiment of this application;

[0039] Figure 12 yes Figure 11 Enlarged schematic diagram of region F in the middle;

[0040] Figure 13 This is a top view of the valve plate in an embodiment of this application;

[0041] Figure 14 yes Figure 4 A magnified view of region C in the middle.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Air compressor; 11. Compression assembly; 111. Cylinder liner; 1111. Air duct; 1112. Compression chamber; 1113. Intake chamber; 112. Cylinder head; 1121. Cover body; 1121a. Air outlet; 1121b. Vent hole; 1121c. Weight reduction hole; 1122. Heat sink; 1122a. Reduction diameter protrusion; 1123. Air guide wall; 1123a. First wall surface ; 1123b, Second wall surface; 1123c, Protrusion; 1123d, Third wall surface; 1124, Turbidity teeth; 113, Valve plate; 1131, One-way valve; 1132, Through hole; 114, Piston; 115, Motor; 116, Crankshaft; 12, Air tank; 121, Mounting base; 13, Cooling assembly; 131, Housing; 1311, Receiving chamber; 132, Cooling fan. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0045] In this embodiment of the invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0046] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0047] Furthermore, the terms "installation," "setting," "equipped with," "opening," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0048] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0049] Currently, air compressors face numerous limitations in their application scenarios due to poor heat dissipation. To improve heat dissipation, cooling fans are typically installed inside the air compressor to cool its internal components via airflow. However, this design is ineffective at dissipating heat from areas where it is concentrated. Alternatively, external cooling devices can be installed to cool the air compressor directly from the outside. This method fails to dissipate heat from the inside of the compressor, causing heat to concentrate internally, accelerating the aging of internal components, and increasing the equipment's footprint and energy consumption.

[0050] To address the aforementioned technical problems, one embodiment of this utility model provides an air compressor. The air compressor has a cylinder head cover with an internal airflow duct communicating with the housing. An air outlet communicating with the airflow duct is located on the cylinder head cover, and a guide wall is provided at the air outlet. The guide wall guides the cooling airflow within the airflow duct to a heat sink located above the cover, allowing the cooling airflow generated by the internal cooling fan to simultaneously dissipate heat from the cylinder head. This fully utilizes the cooling fan and heat sink, improving the cooling effect on the cylinder head, preventing heat concentration during operation, avoiding or slowing down the aging of internal components, and extending the service life of the air compressor. Simultaneously, because the guide wall is positioned corresponding to the air outlet, it provides some protection to the outlet, preventing external debris and foreign objects from entering the airflow duct and the air compressor interior through the air outlet. This prevents blockage of the airflow duct, which would affect the cooling effect, and also prevents foreign objects from causing wear inside the air compressor, thus avoiding interference with its normal operation.

[0051] The implementation details of this utility model will be described in detail below. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0052] Please see Figures 1 to 3 , Figure 1 This is a three-dimensional structural diagram of the air compressor in the embodiments of this application. Figure 2 yes Figure 1 The diagram shown is a top view of an air compressor. Figure 3 yes Figure 1 The diagram shows a side view of the air compressor.

[0053] In some embodiments, the air compressor 1 includes a compression assembly 11 for receiving gas and compressing the gas to a target pressure.

[0054] In some embodiments, the air compressor 1 further includes an air storage tank 12, which is connected to the compression assembly 11 via an air pipe. Gas compressed by the compression assembly 11 enters the air storage tank 12 through the air pipe. The air storage tank 12 can store a certain amount of compressed gas for the user to use at any time. For example, the capacity of the air storage tank 12 is typically 2m³. 3 -5m 3 Of course, in some cases, the capacity of the gas storage tank 12 can be less than 2m³. 3 Or greater than 5m 3 .

[0055] In some embodiments, the compression assembly 11 can be fixed to the air tank 12 to achieve integration of the various parts of the air compressor, making it easier for the user to move the air compressor 1. For example, a mounting base 121 can be provided on the air tank 12, and the compression assembly 11 can be fixed to the mounting base 121.

[0056] Optionally, the gas storage tank 12 can be a hollow cylinder, a hollow hexahedron, or a hollow polygonal prism, or other hollow structures similar to the aforementioned shapes. This application uses a cylindrical gas storage tank 12 as an example for illustration, but it does not mean that the following content applies only to this example.

[0057] In some embodiments, in order to keep the air compressor 1 stable as a whole, the compression assembly 11 can be fixed above the air tank 12 along the height direction P1, and the projection of the compression assembly 11 in the height direction P1 is located directly above the axis of the air tank 12.

[0058] In some embodiments, the air compressor 1 further includes a cooling assembly 13, which can be disposed between the air receiver 12 and the compression assembly 11, with the compression assembly 11 fixed to the air receiver 12 via the cooling assembly 13. The cooling assembly 13 is used to cool the compression assembly 11 and other components in the air compressor 1, so as to maintain a stable internal temperature of the air compressor 1, thereby enabling the air compressor 1 to operate continuously in a stable state.

[0059] Please see also Figures 4 to 7 , Figure 4 yes Figure 3The diagram shows a cross-sectional view of the air compressor along the A-A' direction. Figure 5 yes Figure 4 Enlarged diagram of region B in the middle. Figure 6 yes Figure 5 Enlarged diagram of region D in the middle. Figure 7 yes Figure 1 An enlarged schematic diagram of region A in the attached figure. Unlabeled arrows in the diagram indicate the direction of the cooling airflow.

[0060] In some embodiments, the cooling assembly 13 includes a housing 131 having a receiving chamber 1311, which can be used to accommodate other structures and devices of the air compressor 1. It is understood that the housing 131 can be secured to the air tank 12 by means of a mounting base 121.

[0061] In some embodiments, the cooling assembly 13 further includes a cooling fan 132, which is disposed on the housing 131 and housed in the receiving chamber 1311. The cooling fan 132 is rotatable relative to the housing 131 and introduces air from outside the housing 131 into the housing 131 by rotating, so that the air entering the housing 131 forms a cooling airflow. The cooling airflow can cool the components disposed inside the housing 131, so that the internal working environment of the air compressor 1 remains stable, which is beneficial to the continuous and stable operation of the components inside the air compressor 1.

[0062] In some embodiments, the compression assembly 11 includes a cylinder liner 111, which is disposed above the housing 131 along the height direction P1. The cylinder liner 111 has a guide air duct 1111 extending along the height direction P1 and communicating with the receiving chamber 1311. In this way, a portion of the cooling airflow in the receiving chamber 1311 can enter the guide air duct 1111 and flow along the extension direction of the guide air duct 1111, so that the cooling airflow can flow to other positions of the air compressor 1 under the action of the guide air duct 1111, which helps to cool the air compressor 1 comprehensively.

[0063] It should be noted that the air guide duct 1111 is separated from the compression chamber 1112 inside the cylinder liner 111, and the compression chamber 1112 is also separated from the receiving chamber 1311. The airflow in the receiving chamber 1311 cannot enter the compression chamber 1112. The compression chamber 1112 is used to compress gas.

[0064] In some embodiments, the cylinder liner 111 and the housing 131 can be constructed as an integral structure, that is, the cylinder liner 111 and the housing 131 are continuous structures. This can improve the overall structural strength of the air compressor 1 and reduce the number of steps required to assemble the cylinder liner 111 and the housing 131.

[0065] In some embodiments, the compression assembly 11 further includes a cylinder head 112, which is fixed to the cylinder liner 111 along the height direction P1 and is located at the end of the cylinder liner 111 away from the housing 131.

[0066] In some embodiments, the cylinder head 112 includes a cover 1121 disposed above the cylinder sleeve 111 along the height direction P1. A heat sink 1122 is disposed at one end of the cover 1121 away from the cylinder sleeve 111. The heat sink 1122 is used to contact and exchange heat with the air outside the air compressor 1, thereby cooling the cylinder head 112.

[0067] In some embodiments, the cover 1121 is provided with an air outlet 1121a corresponding to the air duct 1111. The air outlet 1121a is connected to the air duct 1111, so that part of the cooling airflow in the air duct 1111 can flow from the air outlet 1121a to the outside of the cylinder head 112, and cool the cylinder head 112 on the outside of the cylinder head 112.

[0068] In some embodiments, the edge of the cylinder head 112 is further provided with a guide wall 1123. The guide wall 1123 can guide the cooling airflow output from the air outlet 1121a to the surface of the heat sink 1122, thereby accelerating the heat dissipation of the heat sink 1122, improving the cooling efficiency of the cylinder head 112, preventing heat concentration in the air compressor 1 during operation, avoiding or delaying the aging of internal components of the air compressor 1, and extending the service life of the air compressor 1. At the same time, since the guide wall 1123 is provided corresponding to the air outlet 1121a, it can protect the air outlet 1121a to a certain extent, preventing some debris and foreign objects from entering the guide air duct 1111 and the interior of the air compressor 1 from the air outlet 1121a, preventing the guide air duct 1111 from being blocked and affecting the cooling effect, and preventing foreign objects from entering and causing wear inside the air compressor 1, thus preventing foreign objects from affecting the normal use of the air compressor 1.

[0069] It is worth noting that the airflow guide wall 1123 is located between the heat sink 1122 and the cover 1121, which refers to two parallel or independent states: firstly, in terms of spatial position, the airflow guide wall 1123 is located between the heat sink 1122 and the cover 1121 in the height direction P1; secondly, in terms of airflow path, the cooling airflow flows first through the cover 1121, then through the airflow guide wall 1123, and finally through the heat sink 1122.

[0070] In some embodiments, the orthographic projection of the guide wall 1123 on the height direction P1 of the housing 131 covers at least a portion of the air outlet 1121a. By making the orthographic projection of the guide wall 1123 on the height direction P1 of the housing 131 cover at least a portion of the air outlet 1121a, the protective effect of the guide wall 1123 on the air outlet 1121a can be improved, preventing foreign objects from entering the guide air duct 1111 and causing blockage of the guide air duct 1111. It can also prevent liquids or foreign objects from entering the air compressor 1 and causing damage to the air compressor 1 during operation, maintaining a normal and clean internal operating environment of the air compressor 1, and extending the service life of the air compressor 1.

[0071] For example, the coverage area of ​​the air outlet 1121a by the orthogonal projection of the guide wall 1123 in the height direction P1 can be 50%-100%. That is, the ratio of the orthogonal projection area of ​​the guide wall 1123 in the height direction P1 to the area of ​​the air outlet 1121a is in the range of 50%-100%, such as 50%, 60%, 70%, 80%, 90%, or 100%, or other values ​​within the above range. Within this range, the guide wall 1123 can block more debris and foreign objects, and the protection effect on the air outlet 1121a is better. When the ratio of the projected area of ​​the guide wall 1123 in the height direction P1 to the area of ​​the air outlet 1121a is less than 50%, the guide wall 1123 has a poor protective effect on the air outlet 1121a, and foreign objects and debris outside the air compressor 1 can easily enter the guide duct 1111 from the air outlet 1121a.

[0072] In some embodiments, the air outlet 1121a can be an elongated through hole extending along the edge of the cover 1121, which can increase the air volume of the air outlet 1121a and improve the heat dissipation effect on the heat sink 1122.

[0073] In some embodiments, multiple air outlets 1121a can be provided, arranged at intervals along the edge of the cover 1121. This allows for a suitable reduction in the size of the air outlets 1121a, better blocking foreign objects and preventing larger foreign objects from entering the airflow duct 1111 and the receiving chamber 1311. It is understood that when there are multiple air outlets 1121a, the ratio of the orthographic projection area of ​​the portion of the guide wall 1123 corresponding to each air outlet 1121a in the height direction P1 to the area of ​​its corresponding air outlet 1121a is in the range of 50%-100%.

[0074] In some embodiments, an air outlet 1121a is provided on a portion of the edge of the cover 1121, while no air outlet 1121a is provided on the other portion of the edge of the cover 1121. In this way, the cooling airflow output from the air outlet 1121a on one side of the cover 1121 can flow unidirectionally to the other side of the cover 1121, which can better dissipate heat from the heat sink 1122.

[0075] In some embodiments, the guide wall 1123 includes a first wall surface 1123a and a second wall surface 1123b connected to each other for guiding cooling airflow. The first wall surface 1123a extends along the height direction P1, and the second wall surface 1123b extends from thereto avoids extending toward the heat sink 1122. In this way, the cooling airflow output from the air outlet 1121a can be accurately guided to the surface of the heat sink 1122 through the first wall surface 1123a and the second wall surface 1123b to dissipate heat from the heat sink 1122.

[0076] In some embodiments, the first wall surface 1123a and the second wall surface 1123b are arranged at an angle, for example, the angle between the first wall surface 1123a and the second wall surface 1123b is α, and α satisfies the relationship: 90°≤α≤140°. For example, the value of α can be 90°, 100°, 110°, 120°, 130° or 140°, or other values ​​within the range of the above inequality. In this way, the cooling airflow output from the air outlet 1121a, under the action of the first wall surface 1123a and the second wall surface 1123b, can flow towards the heat sink 1122 along a path that is approximately parallel to the extending direction of the heat sink 1122, so that the cooling airflow can make more sufficient contact with the heat sink 1122, thereby improving the cooling effect on the heat sink 1122, and thus improving the cooling effect on the cylinder head 112.

[0077] Understandably, when the angle α between the first wall surface 1123a and the second wall surface 1123b is less than 90°, the guide wall 1123 has a large resistance to the cooling airflow, and some of the cooling airflow flowing out of the air outlet 1121a may flow back into the guide air duct 1111, resulting in a weakening of the cooling airflow that effectively cools the heat sink 1122, thereby reducing the cooling effect on the heat sink 1122. When the angle α between the first wall surface 1123a and the second wall surface 1123b is greater than 140°, the cooling airflow flowing out of the air outlet 1121a deviates from the heat sink 1122 by a large angle under the guidance of the guide wall 1123, resulting in most of the cooling airflow not effectively cooling the heat sink 1122, poor heat dissipation effect, and waste of cooling airflow.

[0078] In some embodiments, when the included angle α between the first wall surface 1123a and the second wall surface 1123b is large, for example, when α ≥ 120°, a protrusion 1123c can be provided at the end of the second wall surface 1123b away from the first wall surface 1123a. The protrusion 1123c extends in the horizontal direction P2, that is, perpendicular to the height direction P1, and the protrusion 1123c protrudes relative to the second wall surface 1123b. By providing the protrusion 1123c, the upward angle of the cooling airflow can be appropriately limited, making the cooling airflow closer to the heat sink 1122.

[0079] In some embodiments, the guide wall 1123 further includes a third wall surface 1123d located between the first wall surface 1123a and the second wall surface 1123b. The first wall surface 1123a is connected to the second wall surface 1123b through the third wall surface 1123d. The third wall surface 1123d is a curved surface, and the cross-sectional profile of the third wall surface 1123d parallel to the height direction P1 of the housing 131 is constructed as an arc segment. By setting the third wall surface 1123d between the first wall surface 1123a and the second wall surface 1123b, and constructing the cross-sectional profile of the third wall surface 1123d as an arc segment, the wind resistance of the guide wall 1123 to the cooling airflow can be reduced, allowing the cooling airflow to flow more smoothly. This maintains a high flow velocity when the cooling airflow exits from the guide wall 1123, thereby improving the air exchange efficiency of the cooling airflow on the surface of the heat sink 1122 and thus improving the cooling efficiency of the heat sink 1122.

[0080] It is understandable that the arc-shaped segment of the cross-section of the third wall surface 1123d is tangent to the cross-section of the first wall surface 1123a at their junction, and the arc-shaped segment of the cross-section of the third wall surface 1123d is tangent to the cross-section of the second wall surface 1123b at their junction. This effectively reduces the airflow resistance at the junction of the third wall surface 1123d with the first and second walls 1123a and 1123b, allowing the cooling airflow to maintain a higher velocity towards the heat sink 1122, thereby improving the heat dissipation effect of the heat sink 1122.

[0081] It should be noted that the cylinder head 112 can be a square groove structure or a round groove structure. The following description uses a square groove structure as an example, but it is not to be stated that the following content only applies to this example.

[0082] In some embodiments, the air outlet 1121a may be provided along one edge of the cover 1121, and the guide wall 1123 may be provided corresponding to the edge of the cover. In this way, the cooling airflow output from the air outlet 1121a can flow from one side of the cover 1121 to the other side, thereby efficiently cooling the cover 1121.

[0083] Please see also Figure 8 , Figure 8This is a schematic diagram of the bottom of the cylinder head 112 in an embodiment of this application. The cylinder head 112 has two independent intake chambers 1113.

[0084] In some embodiments, the other two edges of the cover 1121 connected to the edge where the air outlet 1121a is provided may be provided with ventilation holes 1121b. The ventilation holes 1121b communicate with the receiving chamber 1311, so that the cooling airflow inside the receiving chamber 1311 can also be output to the outside of the air compressor 1 through the ventilation holes 1121b. By providing ventilation holes 1121b at the edge of the cylinder head 112, spaced from the air outlet 1121a and communicating with the receiving chamber 1311, the cooling airflow drawn by the cooling fan into the receiving chamber 1311 can be discharged to the outside of the air compressor 1 through the ventilation holes 1121b after cooling the internal components of the air compressor 1. This ensures effective cooling of the internal components of the air compressor 1 and also prevents excessive internal pressure from affecting the normal operation of the air compressor 1 or even damaging the air compressor.

[0085] Understandably, since only a portion of the cooling airflow entering the receiving chamber 1311 through the cooling fan 132 is output to the outside of the air compressor 1 through the guide air duct 1111 and the air outlet 1121a, the air pressure inside the air compressor 1 may become too high when the cooling fan 132 is working continuously. The ventilation hole 1121b can speed up the efficiency of air being discharged from the air compressor 1, thereby improving the cooling efficiency inside the air compressor 1 and keeping the air pressure inside and outside the air compressor 1 consistent.

[0086] In some embodiments, the edge of the cover 1121 is also provided with a weight-reducing hole 1121c. For example, the weight-reducing hole 1121c can be provided on another edge opposite to the edge where the air outlet 1121a is provided. It is understood that the weight-reducing hole 1121c is a hole formed by the hollowed-out portion on the cover 1121. In this way, the weight of the cover 1121 can be reduced, thereby reducing the weight of the air compressor 1, which helps to achieve a lightweight design of the air compressor 1 and facilitates the movement and transportation of the air compressor 1.

[0087] In some embodiments, the weight reduction hole 1121c can also communicate with the receiving chamber 1311, so that a portion of the cooling airflow inside the receiving chamber 1311 can also be output to the outside of the air compressor 1 through the weight reduction hole 1121c. This can further improve the heat dissipation effect inside the air compressor 1 and balance the air pressure inside and outside the air compressor 1.

[0088] In some embodiments, the heat sink 1122 can be arranged generally along a direction perpendicular to the edge where the air outlet 1121a is provided. In this case, the cooling airflow output from the air outlet 1121a can simultaneously contact the surfaces of opposite sides of the heat sink 1122, increasing the contact area between the heat sink 1122 and the cooling airflow, accelerating the heat exchange efficiency between the heat sink 1122 and the cooling airflow, and improving the heat dissipation effect of the heat sink 1122.

[0089] Optionally, the heat sink 1122 can be a straight plate structure or a wavy structure. When the heat sink 1122 is a straight plate structure, its structure is simple and easy to manufacture, which can reduce the manufacturing difficulty and cost of the air compressor 1. When the heat sink 1122 is a wavy structure, within the same straight segment, the extension path of the wavy structure is longer, which can increase the area of ​​the heat sink 1122, thereby helping to improve the heat dissipation efficiency of the heat sink 1122.

[0090] It is understandable that the air outlet 1121a, the ventilation hole 1121b, and the weight reduction hole 1121c can be arranged to be distributed on the outer periphery of the heat sink 1122. In this way, the cooling airflow output from the air outlet 1121a, the ventilation hole 1121b, and the weight reduction hole 1121c can all dissipate heat from the heat sink 1122, thereby improving the cooling effect on the cylinder head 112.

[0091] It should be noted that the following description uses the heat sink 1122 as an example of a straight plate structure, but it is not to be stated that the following content only applies to this example.

[0092] Please see also Figures 9 to 12 , Figure 9 This is a top view schematic diagram of a cylinder head with turbulence teeth in an embodiment of this application. Figure 10 yes Figure 9 Enlarged diagram of region E in the middle. Figure 11 This is a top view schematic diagram of a cylinder head with a reduced diameter protrusion in an embodiment of this application. Figure 12 yes Figure 11 A magnified diagram of region F in the middle.

[0093] In some embodiments, there are multiple heat sinks 1122, which are spaced apart along their thickness direction. In this case, the air outlet 1121a is arranged along the thickness direction, and the guide wall 1123 extends along the thickness direction. By setting multiple heat sinks 1122, the contact area between the heat sinks 1122 and the air can be increased, thereby improving the cooling efficiency of the cylinder head 112. Through the guide wall 1123, the cooling airflow output from the air outlet 1121a can be guided to the gaps between all the heat sinks 1122, so that the cooling airflow contacts the surface of the multiple heat sinks 1122 and exchanges heat with the heat sinks 1122, thereby further improving the cooling efficiency of the cylinder head 112.

[0094] In some embodiments, the cover 1121 is provided with turbulence teeth 1124 between any two adjacent heat sinks 1122. The turbulence teeth 1124 are used to generate turbulence in the cooling airflow entering the gap between the two heat sinks 1122. The turbulence can accelerate the mixing efficiency of the various particles inside the cooling airflow, thereby accelerating the heat exchange between different particles inside the cooling airflow, and thus improving the heat dissipation efficiency of the cooling airflow on the heat sinks 1122.

[0095] It is understandable that the turbulence teeth 1124 cause the cooling airflow entering the gap of the heat sink 1122 to form turbulence, which can accelerate the mixing of the airflow that has absorbed heat and is in contact with the surface of the heat sink 1122 with the airflow that has not yet come into contact with the heat sink 1122, accelerate the heat exchange inside the cooling airflow, and thus improve the cooling effect of the cooling airflow on the heat sink 1122.

[0096] Specifically, by setting the turbulence teeth 1124, the gap between the two heat sinks 1122 can be divided into multiple small gas flow channels. By reducing the diameter of the gas flow channels, the flow rate of the cooling gas in the channels can be accelerated, forming turbulence inside the cooling airflow, thereby improving the cooling efficiency of the heat sinks 1122.

[0097] In some embodiments, the turbulence teeth 1124 may extend along the length direction of the heat sink 1122 or along the height direction P1, and this application does not specifically limit this.

[0098] In some embodiments, the dimensions of the turbulence-inducing teeth 1124 in the thickness direction of the heat sink 1122 decrease towards both ends in the direction of the cooling airflow. In this way, the turbulence-inducing teeth 1124 can be used to create turbulence between the two heat sinks 1122 while minimizing wind resistance.

[0099] In other embodiments, a reduced diameter protrusion 1122a may be provided on the sidewall, i.e., the surface, of the heat sink 1122. This can reduce the width of the gap between the two heat sinks 1122 at the location where the reduced diameter protrusion 1122a is provided, thereby accelerating the flow rate of the cooling airflow and improving the cooling efficiency of the heat sink 1122.

[0100] Since the cooling airflow absorbs relatively little heat when it first flows out of the air outlet 1121a, it can effectively dissipate heat from the heat sink 1122. As the cooling airflow flows along the surface of the heat sink 1122, it gradually absorbs heat from the heat sink 1122, causing the energy of the cooling airflow to increase, thereby reducing the cooling effect on the heat sink 1122. In some embodiments, the gap between two adjacent heat sinks 1122 can be gradually reduced along the flow direction of the cooling airflow. In this way, as the cooling airflow flows, the gap between adjacent heat sinks 1122 decreases, and the flow velocity of the cooling airflow increases accordingly, thereby improving the cooling efficiency of the heat sink 1122.

[0101] In some embodiments, the surfaces of two adjacent heat sinks 1122 facing each other can be inclined closer to each other in the direction of cooling airflow to gradually reduce the gap between the two heat sinks 1122. As the gap between the two heat sinks 1122 decreases, the flow rate of the cooling airflow gradually increases. When the flow rate increases to a certain range of Reynolds number Re, the cooling airflow changes from laminar flow to turbulent flow, which can accelerate the heat transfer efficiency inside the cooling airflow and thus improve the cooling efficiency of the cooling airflow on the heat sinks 1122.

[0102] It is understandable that using the turbulence teeth 1124 to create turbulence to improve cooling efficiency specifically involves increasing the heat exchange efficiency within the cooling airflow. This allows the gas that has absorbed heat from the surface of the heat sink 1122 to quickly mix and exchange heat with the gas that has not absorbed heat, thus lowering the temperature of the cooling airflow on the surface of the heat sink 1122 and enabling the cooling airflow to continue exchanging heat with the heat sink 1122. Similarly, increasing the cooling airflow velocity by reducing the distance between two adjacent heat sinks 1122 can also create turbulence in the cooling airflow, thereby improving cooling efficiency.

[0103] Please see also Figure 13 , Figure 13 This is a top view of the valve plate in an embodiment of this application.

[0104] In some embodiments, the compression assembly 11 further includes a valve plate 113, which is fixed along the height direction P1 between the cylinder liner 111 and the cylinder head 112. The valve plate 113 divides the space enclosed by the cylinder liner 111 and the cylinder head 112 into two sub-spaces. The sub-space formed by the cylinder liner 111 and the valve plate 113 is the compression chamber 1112, and the two sub-spaces formed by the valve plate 113 and the cylinder head 112 are the intake chambers 1113. The gas to be compressed can enter the compression chamber 1112 from the intake chamber 1113 through the valve plate 113, be compressed in the compression chamber 1112, and then enter the other intake chamber 1113 through the valve plate 113. From the intake chamber 1113, the gas then enters the gas storage tank 12 through the gas pipe.

[0105] Understandably, the valve plate 113 is equipped with two one-way valves 1131, so that during the intake process, the gas can only enter the compression chamber 1112 from the intake chamber 1113 through one of the one-way valves 1131. After the gas compression is completed, the compressed gas can only enter the other intake chamber 1113 from the compression chamber 1112 through the other one-way valve 1131.

[0106] In some embodiments, the valve plate 113 is completely disposed inside the cylinder liner 111 and cylinder head 112. In other embodiments, the valve plate 113 may extend to the outside of the cylinder liner 111 and cylinder head 112. In this case, a through hole 1132 may be provided on the valve plate 113 to connect the air outlet 1121a and the air guide duct 1111, and to connect the ventilation hole 1121b and the weight reduction hole 1121c with the receiving chamber 1311.

[0107] Please see again Figure 4 Right now Figure 5 See also Figure 14 , Figure 14 yes Figure 4 A magnified view of region C in the middle.

[0108] In some embodiments, the compression assembly 11 further includes a piston 114, which is movably disposed inside the housing 131. The piston 114 is capable of reciprocating in the compression chamber 1112. When the piston 114 moves away from the valve plate 113, the air compressor 1 intakes air from the intake chamber 1113 into the compression chamber 1112. When the piston 114 moves closer to the valve plate 113, the air compressor 1 compresses the gas. The compressed gas moves from the compression chamber 1112 into another intake chamber 1113 and then into the air storage tank 12.

[0109] It is understandable that the cylinder liner 111, valve plate 113 and piston 114 together form the compression chamber 1112.

[0110] In some embodiments, the compression assembly 11 further includes a motor 115 and a crankshaft 116. The crankshaft 116 is fixedly connected to the output shaft of the motor 115, and the piston 114 is movably connected to the crankshaft 116. When the motor 115 is working, the output shaft of the motor drives the crankshaft to rotate, and the crankshaft drives the piston 114 to reciprocate, thereby achieving gas compression.

[0111] Understandably, the cooling fan 132 can also be fixed to the output shaft of the motor 115, so that when the motor 115 works and drives the piston 114 to compress gas, the cooling fan 132 works synchronously to provide cooling airflow to the air compressor 1.

[0112] In some embodiments, there are two cooling fans 132, located on opposite sides of the motor 115 and both fixedly connected to the output shaft of the motor 115. Correspondingly, pistons 114, cylinder liners 111, cylinder heads 112, etc., are arranged above the two cooling fans 132. That is, by using one motor 115, two pistons 114 can be driven simultaneously to compress gas, thereby improving the compression efficiency of the air compressor 1. Figure 2 As shown, the guide walls 1123 of the two cylinder heads 112 are arranged opposite each other on the same horizontal plane or in a direction parallel to the motor axis, and the heat sinks 1122 of the two cylinder heads 112 are arranged opposite each other, which can increase the cooling path and improve the heat dissipation effect.

[0113] This invention optimizes the airflow path and heat dissipation structure to achieve efficient heat dissipation from the air compressor 1 without adding external equipment. Testing shows that this design can reduce the surface temperature of the cylinder head 112 by 20%-30%, significantly improving the operational stability of the equipment. Furthermore, the protective function of the guide wall 1123 reduces maintenance frequency and lowers operating costs.

[0114] The air compressor provided by the embodiments of this utility model has been described in detail above. Specific examples have been used in this article to illustrate the principle and implementation of this utility model. The above description of the embodiments is only for the purpose of helping to understand the idea of ​​this utility model. There may be changes in the specific implementation and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An air compressor comprising a housing, a cooling fan rotatably provided in the housing, a cylinder jacket connected to the housing, and a cylinder head connected to the cylinder jacket, the housing having a receiving chamber, the cooling fan being provided in the receiving chamber and introducing a cooling air flow into the receiving chamber, characterized in that: The cylinder liner has a flow guide air duct extending along the height direction of the shell, the flow guide air duct is communicated with the accommodating chamber, and the flow guide air duct receives a cooling airflow; the cylinder head comprises a cover body, a heat sink and a flow guide wall, the cover body is connected above the cylinder liner along the height direction of the shell, the heat sink is arranged above the cover body along the height direction of the shell, and the flow guide wall is located between the heat sink and the cover body; the cover body has an air outlet corresponding to the flow guide air duct and communicated with the flow guide air duct, and the flow guide wall guides the airflow in the flow guide air duct to the outer surface of the heat sink.

2. The air compressor of claim 1, wherein: The flow guide wall comprises a first wall surface and a second wall surface connected to each other, the first wall surface extends along the height direction of the shell, the second wall surface extends towards the heat sink, the first wall surface is arranged at an angle with the second wall surface, and the angle between the first wall surface and the second wall surface is greater than or equal to 90° and less than or equal to 140°.

3. The air compressor of claim 2, wherein: The flow guide wall further comprises a third wall surface located between the first wall surface and the second wall surface, the first wall surface is connected to the second wall surface through the third wall surface, the third wall surface is a curved surface, and the third wall surface has an arc segment in a cross section parallel to the height direction of the shell.

4. The air compressor of any one of claims 1-3, wherein: The air compressor further comprises a valve plate arranged between the cylinder liner and the cylinder head, the valve plate is provided with a through hole, and the through hole is communicated with the accommodating chamber; and a projection of the flow guide wall on the height direction of the shell covers at least part of the air outlet.

5. The air compressor of any one of claims 1-3, wherein: An air exchange hole is further arranged on the edge of the cylinder head and spaced from the air outlet, the air exchange hole penetrates the edge of the cover body and is communicated with the accommodating chamber.

6. The air compressor of any one of claims 1-3, wherein: The heat sink is in a straight plate shape or a wave plate shape; a weight reduction hole is further arranged on the edge of the cylinder head and spaced from the air outlet, and the weight reduction hole is communicated with the accommodating chamber.

7. The air compressor of any one of claims 1-3, wherein: The heat sink is a plurality of heat sinks, the plurality of heat sinks are arranged at intervals along the thickness direction of the heat sink, the air outlet and the flow guide wall extend along the thickness direction, and the flow guide wall guides the airflow in the flow guide air duct to the gap between the plurality of heat sinks; wherein the thickness direction is perpendicular to the height direction of the shell.

8. The air compressor of claim 7, wherein: A turbulence tooth extending along the length direction of the heat sink is arranged between the opposite side walls of any two adjacent heat sinks, and the turbulence tooth causes the airflow between the two adjacent heat sinks to be turbulent; wherein the length direction is perpendicular to the height direction of the shell.

9. The air compressor of claim 7, wherein: The distance between the opposite side walls of any two adjacent heat sinks gradually decreases along the flow direction of the airflow.

10. The air compressor of any one of claims 1-3, wherein: The air compressor comprises a motor installed in the shell, the motor comprises a motor shaft extending along the horizontal direction; one cooling fan is arranged on each of the two ends of the motor shaft in the axial direction; one cylinder head is arranged above each cooling fan along the height direction of the shell, and one flow guide wall is arranged on the side edge of each cylinder head; and the two flow guide walls are arranged opposite to each other along the axial direction of the motor shaft.

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