Air compression device and air compressor

Abstract

The present invention relates to the field of air compression technology, and specifically to an air compression device and an air compressor. The air compression device includes a cylinder, a cylinder head, a piston assembly, a connecting rod and a valve plate assembly. The cylinder includes a cylinder body and a piston cavity axially penetrating the cylinder body, the piston assembly is slidingly and sealingly connected to the piston cavity, and the valve plate assembly is fixedly connected between the cylinder head and the cylinder. In the air compression device of the above structure, the valve plate assembly has both the functions of air intake and exhaust. Compared with the structural form in which the air intake assembly and the exhaust assembly are separately arranged in the prior art, the structure is simpler and more compact, the production cost is lower, the assembly efficiency is higher, and due to the concentrated functions, it is more convenient to replace and repair. Both the cylinder and the cylinder head have a cooling and heat dissipation method that combines internal cooling with external heat dissipation, which can effectively reduce the working temperature, thereby increasing the continuous working time and working life of the air compression device.

Description

Technical Field

[0001] The present invention relates to the technical field of air compression, and in particular to an air compression device and an air compressor. Background Art

[0002] The electric air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy. It is an air pressure generating device for compressed air, and the core structure of the electric air compressor is the air compression device.

[0003] The air compression device in the prior art usually includes a cylinder, a cylinder head, a piston and a connecting rod mechanism connected to the piston, wherein the cylinder has a piston cavity inside, and the piston reciprocates in the piston cavity. The cylinder head is generally provided with an exhaust port, an exhaust assembly is provided between the cylinder head and the cylinder, and an intake assembly is provided at the top of the piston. Its working principle is that when the piston moves downward in the piston cavity, the intake valve plate of the intake assembly opens, and the gas in the crankcase enters the cavity between the top of the piston and the exhaust assembly through the intake valve plate. When the piston moves downward to the extreme position, it starts to move upward in the piston cavity. At this time, the intake valve plate of the intake assembly is closed, and the exhaust valve plate of the exhaust assembly is opened. The compressed air is transported to the air storage tank through the exhaust valve plate and the exhaust port on the cylinder head to achieve air compression.

[0004] The defects of the above structure are that the exhaust component and the intake component are separately arranged, the structure is complex and the cost is high; the air is compressed in the piston cavity, and the cooling can only rely on the air cooling outside the cylinder. The operating temperature of the cylinder is relatively high, and the cooling performance needs to be improved, which limits the continuous working time of the air compression device and the service life. Summary of the invention

[0005] The technical problem to be solved by the present invention is to solve the technical defects of the air compression device in the prior art, such as complex structure, high cost, limited working time and limited working life due to poor cooling performance.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an air compression device, comprising at least:

[0007] A cylinder, the cylinder comprising a cylinder body and a piston cavity axially penetrating the cylinder body, the cylinder body being provided with a plurality of heat dissipation fins on the outside, the cylinder body being provided with an air intake chamber surrounding the piston cavity on the inside, the air intake chamber being openly arranged on the lower end surface of the piston body, and the air intake chamber being provided with an air outlet on the upper end surface of the piston body;

[0008] A piston assembly, wherein the piston assembly is slidably and sealingly connected to the piston chamber;

[0009] A connecting rod, the connecting rod being movably connected to the piston assembly;

[0010] A cylinder head, the cylinder head is fixedly mounted on the upper part of the cylinder, the cylinder head comprises a cylinder head body, an air intake cavity and an exhaust cavity isolated from each other are arranged inside the cylinder head body, the air outlet is communicated with the air intake cavity, and a plurality of heat dissipation fins are arranged outside the cylinder head body;

[0011] An exhaust joint, wherein the exhaust joint is provided with an exhaust passage communicating with the exhaust cavity;

[0012] A valve plate assembly, wherein the valve plate assembly is fixedly connected between the cylinder head and the cylinder, and the valve plate assembly at least comprises a valve plate, and the valve plate is provided with at least:

[0013] The air inlet holes are connected to the air outlet and the air inlet cavity respectively.

[0014] An air intake through hole, wherein the air intake through hole is connected to the air intake cavity and the piston cavity respectively, and the air intake through hole is provided with an air intake valve sheet;

[0015] An exhaust through hole is connected to the piston chamber and the exhaust chamber respectively, and the exhaust through hole is provided with an exhaust valve sheet.

[0016] In a preferred embodiment, the exhaust joint is arranged on one side of the piston body, and the piston body is provided with an exhaust hole connected with the exhaust channel from the upper end surface of the piston body, and the exhaust hole is connected with the exhaust chamber.

[0017] In a preferred embodiment, the valve plate is provided with an exhaust valve hole which is connected with the exhaust chamber and the exhaust hole respectively.

[0018] In a preferred embodiment, an isolation plate is provided between the air inlet cavity and the air outlet cavity.

[0019] In a preferred embodiment, the exhaust through holes and the air suction through holes are staggered in the radial direction of the valve plate, and the exhaust through holes are closer to the center of the valve plate than the air suction through holes.

[0020] In a preferred embodiment, the intake valve plate is arranged on a side of the valve plate facing the piston chamber, and the exhaust valve plate is arranged on a side of the valve plate facing the cylinder head.

[0021] In a preferred embodiment, the air intake valve plate is provided with an avoidance groove for connecting the exhaust through hole and the piston cavity.

[0022] In a preferred embodiment, the air intake valve plate and the air exhaust valve plate are fixed to the valve plate by bolts and nuts.

[0023] In a preferred embodiment, the exhaust valve disc is further fixedly mounted on a guide plate at a side away from the valve plate, and the side of the guide plate facing the exhaust valve disc is a guide surface, and the distance between the guide surface and the valve plate gradually increases from the center to the edge.

[0024] In a preferred embodiment, a lining is provided on a side of the air intake valve sheet away from the valve plate.

[0025] Compared with the prior art, the air compression device of this embodiment has the following technical advantages:

[0026] (1) Compared with the conventional method in which the gas directly enters the piston cavity from the piston end, since the cylinder body of the present embodiment is provided with an air intake chamber surrounding the piston cavity, the gas must first pass through the air intake chamber inside the cylinder body before being compressed. The gas passing through the air intake chamber performs an effective cooling process on the cylinder, and then cooperates with the heat dissipation of the heat dissipation fins outside the cylinder body. The combination of internal cooling and external heat dissipation can effectively reduce the working temperature of the cylinder, thereby improving the continuous working time and service life of the air compression device;

[0027] (2) An air intake cavity connected to the air intake chamber is provided inside the cylinder head, that is, the air needs to pass through the air intake cavity inside the cylinder head before being compressed. The gas passing through the air intake cavity also has a cooling effect on the cylinder head and the valve plate assembly. Combined with the external heat dissipation fins 2, the cooling and heat dissipation method combining internal cooling with external heat dissipation can also effectively reduce the working temperature of the cylinder head, thereby increasing the continuous working time and service life of the air compression device;

[0028] (3) The valve plate assembly is independently arranged between the cylinder head and the cylinder, and has both the functions of intake and exhaust. Compared with the structural form in which the intake assembly and the exhaust assembly are separately arranged in the prior art, the structure is simpler and more compact, the production cost is lower, the assembly efficiency is higher, and the function is concentrated, so it is more convenient to replace and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the external structure of the air compression device of this embodiment;

[0030] Figure 2 for Figure 1 A partial cross-sectional structural schematic diagram of the air compression device shown;

[0031] Figure 3 for Figure 1 The schematic diagram of the external structure of the air compression device hiding the cylinder head;

[0032] Figure 4 This is a schematic diagram of the external structure of the cylinder in this embodiment when viewed from above;

[0033] Figure 5 This is a schematic diagram of the external structure of the cylinder in the top view of this embodiment;

[0034] Figure 6 is a cross-sectional view of the cylinder of this embodiment;

[0035] Figure 7 This is a schematic diagram of the structure of the cylinder head of this embodiment when viewed from above;

[0036] Figure 8 This is a schematic diagram of the structure of the valve plate assembly in the embodiment when viewed from above;

[0037] Fig. 9 This is a schematic diagram of the structure of the valve plate assembly in a top view of this embodiment;

[0038] Fig.10 is a cross-sectional view of the valve plate assembly of this embodiment;

[0039] Fig.11 Schematic diagram of the structure of the valve plate of this embodiment;

[0040] Fig.12 Schematic diagram of the structure of the air intake valve sheet of this embodiment;

[0041] Fig.13 Schematic diagram of the structure of the pad in this embodiment. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figure 1-3As shown, the air compression device of this embodiment includes a cylinder 10, a cylinder head 20, a piston assembly 40, a connecting rod 50 and a valve plate assembly 30. The cylinder 10 includes a cylinder body 11 and a piston chamber 12 axially penetrating the cylinder body 11. The piston assembly 40 is slidably and sealedly connected to the piston chamber 12 and reciprocates in the piston chamber. One end of the connecting rod 50 is movably connected to the piston assembly 40, and the other end is connected to the crankshaft of the air compressor to provide a driving force for the reciprocating motion of the piston assembly. The valve plate assembly 30 is fixedly connected between the cylinder head and the cylinder.

[0046] The cylinder 10 of this embodiment, as Figure 4-6 As shown, the cylinder body 11 is provided with an air inlet chamber 13 surrounding the piston chamber 12, and the central angle of the air inlet chamber around the piston chamber is between 90° and 360°. In this embodiment, as a preferred embodiment, the central angle is between 180° and 270°. The air inlet chamber 13 is open on the lower end surface of the piston body 11, and an air outlet 14 is provided on the upper end surface of the piston body.

[0047] In this embodiment, a plurality of heat dissipation fins 18 are disposed outside the cylinder body 11 for heat dissipation.

[0048] In this embodiment, an exhaust joint 16 is provided on one side of the piston body 11. The exhaust joint 16 has an exhaust passage 17. Meanwhile, the piston body is also provided with an exhaust hole 15 which is connected to the exhaust passage from the upper end surface of the piston body.

[0049] like Figure 7 As shown, the cylinder head 20 of this embodiment includes a cylinder head body 21, wherein the cylinder head body 21 is provided with an intake cavity 22 and an exhaust cavity 23 which are isolated from each other, and an isolation plate 24 is provided between the intake cavity 22 and the exhaust cavity 23. The intake cavity 22 is communicated with the air outlet 14 of the intake chamber 13, and a plurality of heat dissipation fins 25 are provided on the outside of the cylinder head body 21 for heat dissipation. The exhaust cavity 23 is communicated with the exhaust hole 15 on the piston body.

[0050] like Figure 8-10 As shown, the valve plate assembly 30 of this embodiment has Fig.11 The valve plate 31 is shown. The valve plate 31 is provided with an air inlet hole 311, an air suction hole 313, an air exhaust hole 314 and an air exhaust valve hole 312. The air inlet hole 311 is connected to the air outlet 14 and the air inlet cavity 22 respectively, and is used to provide an air flow channel for air to enter the air inlet cavity from the air inlet chamber. The air inlet hole is preferably an arc hole.

[0051] In this embodiment, there are two air intake holes 313, which are arranged around the center of the valve plate 31 and are preferably arc-shaped holes. The two air intake holes 313 are connected to the air intake chamber 22 and the piston chamber 12 respectively, and are used to provide an air flow channel for air to enter the piston chamber from the air intake chamber during inhalation.

[0052] In this embodiment, there are three exhaust holes 314, which are arranged around the center of the valve plate 31 and are preferably arc-shaped holes. The three exhaust holes 314 are respectively connected to the piston cavity 12 and the exhaust cavity 23, and are used to exhaust the compressed air in the piston cavity into the exhaust cavity.

[0053] Preferably, the exhaust through holes 314 and the suction through holes 313 are staggered in the radial direction of the valve plate, and the exhaust through holes are closer to the center of the valve plate than the suction through holes.

[0054] In this embodiment, the exhaust valve hole 312 is communicated with the exhaust chamber and the exhaust hole respectively, and is used to discharge the compressed air in the exhaust chamber from the exhaust channel through the exhaust valve hole.

[0055] like Fig.10 As shown, in this embodiment, an exhaust valve plate 33 is arranged on the side of the valve plate 31 facing the cylinder head, the center of the exhaust valve plate 33 is fixedly connected to the valve plate, the edge position covers the exhaust through hole, and the exhaust valve plate has a certain elasticity. An intake valve plate 32 is arranged on the side of the valve plate 31 facing the cylinder, the center of the intake valve plate is fixedly connected to the valve plate, the edge position covers the intake through hole, and the intake valve plate has a certain elasticity.

[0056] Preferably, in this embodiment, the air intake valve plate 32 and the air exhaust valve plate 33 are fixedly connected to the valve plate 31 by bolts 36 and nuts 37. In this embodiment, the nuts 37 are located on one side of the air exhaust valve plate.

[0057] Preferably, in this embodiment, a guide plate 34 is further provided between the exhaust valve plate 33 and the nut 37. The side of the guide plate 34 facing the exhaust valve plate 33 is a guide surface, and the distance between the guide surface and the valve plate gradually increases from the center to the edge. The function of the guide surface is to control the deformation of the exhaust valve plate during the exhaust process, and prevent the exhaust valve plate from being unable to return to its original state due to excessive deformation.

[0058] Preferably, in this embodiment, a lining 35 is provided between the air intake valve plate 32 and the nut of the bolt to ensure that the center of the air intake valve plate 32 can fit tightly with the valve plate.

[0059] A suction valve plate of this embodiment is as follows Fig.12 As shown, it includes an outer edge 321 for covering the air intake through hole and a central fixing portion 323, and the central fixing portion 323 is provided with a through hole 324 for the bolt to pass through. Based on the characteristic that the air intake through hole and the exhaust through hole are staggered in the radial direction in this embodiment, an avoidance through groove 322 for connecting the exhaust through hole and the piston cavity is provided between the outer edge 321 and the central fixing portion 323.

[0060] like Fig.13As shown, a gasket 38 is further provided between the cylinder head and the valve plate assembly of this embodiment, and an isolation strip 383 adapted to the isolation plate is provided on the gasket 38. An intake groove 382 and an exhaust groove 381 adapted to the intake chamber and the exhaust chamber are provided based on the isolation of the isolation strip. In order to consider the strength and deformation degree of the structure, a plurality of connecting strips 384 are also provided in the intake groove 382.

[0061] The principle of the air compression device of this embodiment is that during the suction process, when the piston assembly moves downward in the piston cavity, the air enters the intake cavity of the cylinder head from the intake chamber of the cylinder through the intake hole of the valve plate assembly. At this time, the intake valve plate is in an open state under the action of the air pressure, and the exhaust valve plate is in a closed state, and the gas in the intake cavity enters the piston cavity through the intake hole of the valve plate assembly; during the compression process, the piston assembly moves upward in the piston cavity, at this time, the exhaust valve plate is in an open state, and the intake valve plate is in a closed state, and the compressed air in the piston cavity enters the exhaust cavity through the exhaust hole and is discharged through the exhaust joint.

[0062] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air compression device, characterized in that: At least: A cylinder (10), the cylinder comprising a cylinder body (11) and a piston cavity (12) axially penetrating the cylinder body, the cylinder body being provided with a plurality of heat dissipation fins (18) on the outside, the cylinder body being provided with an air intake chamber (13) surrounding the piston cavity on the inside, the air intake chamber being open on the lower end surface of the piston body, and the air intake chamber being provided with an air outlet (14) on the upper end surface of the piston body; A piston assembly (40) which is slidably and sealingly connected to the piston chamber; A connecting rod (50) movably connected to the piston assembly; A cylinder head (20), the cylinder head being fixedly mounted on the upper part of the cylinder, the cylinder head comprising a cylinder head body (21), the cylinder head body being provided with an air intake chamber (22) and an air exhaust chamber (23) which are isolated from each other, the air outlet being communicated with the air intake chamber, and the cylinder head body being provided with a plurality of heat dissipation fins (25) on the outside; An exhaust joint, wherein the exhaust joint is provided with an exhaust passage communicating with the exhaust cavity; A valve plate assembly (30), the valve plate assembly being fixedly connected between the cylinder head and the cylinder, the valve plate assembly comprising at least a valve plate (31), the valve plate being provided with at least: an air inlet through hole (311), wherein the air inlet through hole is connected to the air outlet and the air inlet cavity respectively, An air intake through hole (313), the air intake through hole being connected to the air intake cavity and the piston cavity respectively, and the air intake through hole being provided with an air intake valve sheet; An exhaust through hole (314), wherein the exhaust through hole is respectively connected to the piston chamber and the exhaust chamber, and the exhaust through hole is provided with an exhaust valve sheet.

2. The air compressing device according to claim 1, characterized in that The exhaust joint (16) is arranged on one side of the piston body. The piston body is provided with an exhaust hole (15) which is connected with the exhaust channel (17) from the upper end surface of the piston body. The exhaust hole is connected with the exhaust cavity.

3. The air compressing device according to claim 2, characterized in that: The valve plate is provided with an exhaust valve hole (312) which is respectively connected with the exhaust cavity and the exhaust hole.

4. The air compressing device according to claim 1, characterized in that: An isolation plate (24) is provided between the air inlet cavity (22) and the air outlet cavity (23).

5. The air compressing device according to claim 1, characterized in that: The exhaust through holes and the air suction through holes are arranged alternately in the radial direction of the valve plate, and the exhaust through holes are closer to the center of the valve plate than the air suction through holes.

6. The air compressing device according to claim 5, characterized in that The intake valve sheet is arranged on a side of the valve plate facing the piston chamber, and the exhaust valve sheet is arranged on a side of the valve plate facing the cylinder head.

7. The air compressing device according to claim 6, characterized in that: The air intake valve plate is provided with an avoidance groove (322) for connecting the exhaust through hole and the piston cavity.

8. The air compressing device according to claim 6 or 7, characterized in that: The side of the exhaust valve sheet away from the valve plate is also fixedly arranged on a guide plate (34), and the side of the guide plate facing the exhaust valve sheet is a guide surface, and the distance between the guide surface and the valve plate gradually increases from the center to the edge.

9. The air compressing device according to claim 6 or 7, characterized in that: A lining sheet (35) is arranged on one side of the air intake valve sheet away from the valve plate.

10. An air compressor, characterized in that: At least comprising the air compression device according to any one of claims 1 to 9.

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