High-pressure output air compressor
By setting up a boost channel between the cylinder and the crankcase, the piston realizes secondary pressurization of the air in the cylinder during the reciprocating movement, the problem of failure to use the crankcase chamber compression when the piston moves to the inward dead center in the prior art is solved, and the working efficiency and output pressure of the air compressor are improved.
Patent Information
- Application Number
- CN202510578444.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2025-07-25
AI Technical Summary
The existing piston air compressors fail to effectively compress using the crankcase chamber volume when the piston moves toward the inward dead center, resulting in low working efficiency and low output air pressure.
A high-pressure output air compressor is designed, and a boosting channel is set between the cylinder air compression chamber and the crankcase chamber. During the reciprocating movement, the piston compresses the air in the cylinder to the crankcase chamber as the basic air pressure when the piston moves to the outer dead center. When the piston moves to the inner dead center, the air in the crankcase chamber is recompressed to form a secondary pressurization higher than the compressed air in the cylinder and outputs high-pressure air.
It realizes effective use of air compression within the entire stroke of the piston, improves working efficiency, and increases the pressure of output compressed air, and has the characteristics of compact and reasonable structure, high working efficiency and high output pressure.
Smart Images
Figure CN120367775A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air compressors. Background Art
[0002] Most of the currently used piston air compressors use the air compression chamber of the cylinder as the working chamber of the compressor, and only work when the piston moves unidirectionally. That is, during the reciprocating movement of the piston in the cylinder, only when the piston moves outward to the dead center, the volume of the air compression chamber is compressed, and the compressed air in the air compression chamber is discharged through the cylinder exhaust valve to output compressed air. However, when the piston moves inward to the dead center, the volume of the crankcase chamber is also compressed, but most current air compressors do not utilize this feature for technical improvement, so there is a problem of low working efficiency.
[0003] The National Science and Technology Library Document Center introduced a "transforming a micro air compressor into a quasi-double-acting air compressor with a crankcase supercharger" in the second issue of 1992. This type of compressor has made technical improvements using this feature, such as Figure 3 As shown, based on the original single-acting air compressor, the breathing hole on the original crankcase body 3 is cancelled, and a crankcase suction valve 11 and an exhaust hole 13 are added. A plurality of appropriately shaped inflation holes 14 are circumferentially opened at an appropriate position near the inner dead center of the cylinder 1, and they are connected to the crankcase exhaust hole 13 through a connecting pipe 15 in an appropriate manner. When the piston 2 moves inward to the dead center and the top surface of the piston 2 sweeps across the inflation hole 14, the volume of the crankcase chamber 3-1 is connected to the volume of the cylinder 1 on the cover side, and the compressed gas in the crankcase chamber 3-1 is filled into the cylinder air compression chamber 1-1 through the connecting pipe 15, increasing the intake air volume in the cylinder air compression chamber 1-1, thereby increasing the pressure of the compressed air output by the air compressor.
[0004] Although the above comparative technical solution can generate a relatively high air pressure, there are still the following problems: In the above comparative technical solution, the gas is filled from the crankcase chamber 3-1 into the cylinder air compression chamber 1-1 when the piston 2 is near the inner dead center. At this time, the cylinder air compression chamber 1-1 is at the end of the intake stage and the beginning of the compression stage, and the time is very short. At this time, the cylinder suction valve 6 is still in the open state. Therefore, the filled gas is only a supplement to the relatively negative pressure in the cylinder air compression chamber 1-1 during the intake process. Therefore, the pressure of the air in the cylinder air compression chamber 1-1 before being compressed by the piston 2 is close to the atmospheric pressure. It is compressed based on the atmospheric pressure as the basic pressure, and the basic pressure is relatively low, so the output air pressure after compression is also relatively low. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a high-pressure output air compressor, which has the characteristics of compact and reasonable structure, high working efficiency, and large output pressure.
[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A high-pressure output air compressor includes a cylinder, a piston, a crankcase body, a crankshaft, and a piston connecting rod mechanism. The crankshaft is rotatably supported in the crankcase chamber. The connecting rod in the piston connecting rod mechanism drives the piston to reciprocate in the cylinder through the rotation of the crankshaft. A cylinder intake valve is provided at the top of the cylinder. The crankcase chamber is the compressor working chamber of the high-pressure output air compressor. A compressor working chamber pressurization channel is provided between the cylinder air compression chamber and the crankcase chamber to convey the compressed air in the cylinder air compression chamber to the working chamber of the crankcase chamber, so as to use the compressed air pressure in the cylinder air compression chamber as the basic air pressure of the compressor working chamber. A compressor working chamber exhaust valve communicating with the crankcase chamber is provided. The piston reciprocates in the cylinder. When the piston moves towards the outer dead center, the air inhaled into the cylinder air compression chamber through the cylinder intake valve is compressed. The compressed air is injected into the crankcase chamber through the compressor working chamber pressurization channel to form the basic air pressure of the compressor working chamber. When the piston moves towards the inner dead center, the compressed air injected into the crankcase chamber with the compressed air pressure in the cylinder air compression chamber as the basic air pressure is recompressed to form secondary pressurized compressed air with a pressure higher than the compressed air pressure in the cylinder air compression chamber. The secondary pressurized compressed air is discharged through the compressor working chamber exhaust valve to form the output compressed air of the high-pressure output air compressor.
[0007] The further improvement of the present invention lies in: The compressor working chamber pressurization channel includes a cylinder exhaust valve provided at the top of the cylinder and a crankcase chamber pressurization pipe. The intake port of the crankcase chamber pressurization pipe communicates with the cylinder exhaust valve, and the outlet port of the crankcase chamber pressurization pipe communicates with the crankcase chamber.
[0008] The compressor working chamber pressurization channel includes a crankcase chamber pressurization hole opened on the piston and a piston exhaust valve. The crankcase chamber pressurization hole communicates the cylinder air compression chamber with the crankcase chamber, and the piston exhaust valve is arranged in the crankcase chamber pressurization hole.
[0009] It further includes a crankcase intake valve. The crankcase intake valve is arranged on the crankcase body, and the outlet port of the crankcase chamber pressurization pipe communicates with the crankcase chamber through the crankcase intake valve.
[0010] The compressor working chamber exhaust valve communicates with the crankcase chamber through an anti-oil pipe, so that the position of the compressor working chamber exhaust valve is higher than the height of the crankcase body, thereby avoiding the lubricating oil in the crankcase chamber from splashing into the compressor working chamber exhaust valve when the crankshaft rotates.
[0011] The beneficial effects of adopting the above technical solution are as follows: The present invention designs the crankcase chamber as the compressor working chamber of an air compressor: A compressor working chamber boost passage is provided between the cylinder air compression chamber and the crankcase chamber for delivering the compressed air in the cylinder air compression chamber to the compressor working chamber in the crankcase chamber, so as to use the compressed air pressure in the cylinder air compression chamber as the basic air pressure of the compressor working chamber, and a compressor working chamber exhaust valve communicating with the crankcase chamber is provided. Through the above technical improvement, the air compressor that only works when the piston moves unidirectionally is improved to work simultaneously during reciprocating motion, that is, the previous working mode where the piston only compresses air when moving from the inner dead center to the outer dead center is improved to a working mode where when the piston moves from the inner dead center to the outer dead center, the compressed air in the cylinder air compression chamber is injected into the crankcase chamber to form the basic air pressure of the compressor working chamber; when the piston moves from the outer dead center to the inner dead center, the basic air pressure in the crankcase chamber is recompressed, fully utilizing the working stroke of the air compressor, improving the working efficiency and increasing the pressure of the compressed air output by the air compressor.
[0012] It has the characteristics of a compact and reasonable structure, high working efficiency, and high output pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the present invention; Figure 3 is a schematic structural diagram of the comparative technical solution in the background art of the present invention.
[0014] In the drawings: 1. Cylinder; 1-1. Cylinder air compression chamber; 2. Piston; 2-1. Crankcase chamber boost hole; 3. Crankcase body; 3-1. Crankcase chamber; 4. Crankshaft; 5. Connecting rod; 6. Cylinder intake valve; 7. Compressor working chamber exhaust valve; 8. Cylinder exhaust valve; 9. Crankcase chamber boost pipe; 10. Piston exhaust valve; 11. Crankcase intake valve; 12. Anti-oil pipe; 13. Exhaust hole; 14. Inflation hole; 15. Connecting pipe.
[0015] All kinds of intake valves (cylinder intake valve 6; crankcase intake valve 11) and all kinds of exhaust valves (compressor working chamber exhaust valve 7; cylinder exhaust valve 8; piston exhaust valve 10) in the present invention adopt the intake valves and exhaust valves used in existing air compressors. DETAILED DESCRIPTION OF THE INVENTION
[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0017] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, and bonding that are mature in the prior art, and will not be elaborated here.
[0018] As can be seen from Figures 1 to 2 the embodiment shown, this embodiment includes a cylinder 1, a piston 2, a crankcase body 3, a crankshaft 4, and a piston connecting rod mechanism. The crankshaft 4 is rotatably supported in the crankcase chamber 3-1. The connecting rod 5 in the piston connecting rod mechanism drives the piston 2 to reciprocate in the cylinder 1 through the rotation of the crankshaft 4. An air intake valve 6 of the cylinder is provided at the top of the cylinder 1; the crankcase chamber 3-1 is the compressor working chamber of a high-pressure output air compressor: A compressor working chamber pressurization passage for delivering the compressed air in the cylinder air compression chamber 1-1 into the compressor working chamber in the crankcase chamber 3-1 is provided between the cylinder air compression chamber 1-1 and the crankcase chamber 3-1, so as to use the compressed air pressure in the cylinder air compression chamber 1-1 as the basic air pressure of the compressor working chamber, and a compressor working chamber exhaust valve 7 communicated with the crankcase chamber 3-1 is provided; The crankcase chamber 3-1 serves as the compressor working chamber, and its sealing performance and the pressure range it should withstand are conventional designs in the technical field and will not be elaborated here.
[0019] The piston 2 reciprocates in the cylinder 1. When the piston 2 moves outward to the outer dead center, the air inhaled into the cylinder air compression chamber 1-1 through the air intake valve 6 of the cylinder is compressed, and the compressed air is injected into the crankcase chamber 3-1 through the compressor working chamber pressurization passage to form the basic air pressure of the compressor working chamber; When the piston 2 moves inward to the inner dead center, the compressed air injected into the crankcase chamber 3-1 with the compressed air pressure in the cylinder air compression chamber 1-1 as the basic air pressure is recompressed to form secondary pressurized compressed air higher than the compressed air pressure in the cylinder air compression chamber 1-1. The secondary pressurized compressed air is discharged through the compressor working chamber exhaust valve 7 to form the output compressed air of the high-pressure output air compressor.
[0020] See Figure 1 , the compressor working chamber pressurization passage includes a cylinder exhaust valve 8 provided at the top of the cylinder 1 and a crankcase chamber pressurization pipe 9. The intake port of the crankcase chamber pressurization pipe 9 is communicated with the cylinder exhaust valve 8, and the outlet port of the crankcase chamber pressurization pipe 9 is communicated with the crankcase chamber 3-1, so as to deliver the compressed air in the cylinder air compression chamber 1-1 into the crankcase chamber 3-1 when the piston 2 moves outward to the outer dead center.
[0021] See Figure 2, the supercharging passage of the compressor working chamber includes a crankcase chamber supercharging hole 2-1 formed in the piston 2 and a piston exhaust valve 10. The crankcase chamber supercharging hole 2-1 communicates the cylinder air compression chamber 1-1 with the crankcase chamber 3-1. The piston exhaust valve 10 is arranged in the crankcase chamber supercharging hole 2-1 to convey the compressed air in the cylinder air compression chamber 1-1 into the crankcase chamber 3-1 when the piston 2 moves towards the outer dead center.
[0022] It also includes a crankcase suction valve 11. The crankcase suction valve 11 is arranged on the crankcase body 3. The outlet port of the crankcase chamber supercharging pipe 9 is communicated with the crankcase chamber 3-1 through the crankcase suction valve 11. When the piston 2 moves towards the inner dead center, the crankcase suction valve 11 closes to reduce the compression space when the piston 2 compresses the air in the crankcase chamber 3-1. After the crankcase suction valve 11 closes, when the piston 2 compresses the air in the crankcase chamber 3-1, the compression space in the inner cavity of the crankcase chamber supercharging pipe 9 is reduced, thereby increasing the compression ratio of the crankcase chamber 3-1 to increase the compressed air pressure.
[0023] The compressor working chamber exhaust valve 7 is communicated with the crankcase chamber 3-1 through an oil prevention pipe 12, so that the position of the compressor working chamber exhaust valve 7 is higher than the height of the crankcase body 3, thereby preventing the lubricating oil in the crankcase chamber 3-1 from splashing into the compressor working chamber exhaust valve 7 when the crankshaft 4 rotates, so as to reduce or avoid the lubricating oil content in the compressed air output by the high-pressure output air compressor.
[0024] If the high-pressure output air compressor adopts a completely oil-free compressor structure, the crankshaft 4 and the connecting rod 5 in the crankcase chamber 3-1 are rotationally connected by maintenance-free bearings. Since there is no lubricating oil in the crankcase chamber 3-1, there is no splash lubrication problem, and the oil prevention pipe 12 can be omitted, and the compressor working chamber exhaust valve 7 can be directly arranged on the crankcase body 3.
Claims
1. A high-pressure output air compressor, comprising a cylinder (1), a piston (2), a crankcase body (3), a crankshaft (4) and a piston connecting rod mechanism. The crankshaft (4) is rotatably supported in a crankcase chamber (3-1). The connecting rod (5) in the piston connecting rod mechanism drives the piston (2) to reciprocate in the cylinder (1) through the rotation of the crankshaft (4). A cylinder suction valve (6) is provided at the top of the cylinder (1), and it is characterized in that: The crankcase chamber (3-1) is the compressor working chamber of the high-pressure output air compressor: A compressor working chamber pressurization passage is provided between the cylinder air compression chamber (1-1) and the crankcase chamber (3-1) for conveying the compressed air in the cylinder air compression chamber (1-1) into the compressor working chamber in the crankcase chamber (3-1), so as to use the compressed air pressure in the cylinder air compression chamber (1-1) as the basic air pressure of the compressor working chamber, and a compressor working chamber exhaust valve (7) communicated with the crankcase chamber (3-1) is provided. The piston (2) reciprocates in the cylinder (1). When the piston (2) moves towards the outer dead center, the air inhaled into the cylinder air compression chamber (1-1) through the cylinder intake valve (6) is compressed, and the compressed air is injected into the crankcase chamber (3-1) through the compressor working chamber pressurization passage to form the basic air pressure of the compressor working chamber. When the piston (2) moves towards the inner dead center, the compressed air with the compressed air pressure in the cylinder air compression chamber (1-1) as the basic air pressure injected into the crankcase chamber (3-1) is recompressed to form secondary pressurized compressed air with a pressure higher than the compressed air pressure in the cylinder air compression chamber (1-1), and the secondary pressurized compressed air is discharged through the compressor working chamber exhaust valve (7) to form the output compressed air of the high-pressure output air compressor.
2. The high-pressure output air compressor according to claim 1, wherein: The compressor working chamber pressurization passage includes a cylinder exhaust valve (8) provided at the top of the cylinder (1) and a crankcase chamber pressurization pipe (9). The intake port of the crankcase chamber pressurization pipe (9) is communicated with the cylinder exhaust valve (8), and the outlet port of the crankcase chamber pressurization pipe (9) is communicated with the crankcase chamber (3-1).
3. The high-pressure output air compressor according to claim 1, characterized in that: The compressor working chamber pressurization passage includes a crankcase chamber pressurization hole (2-1) opened on the piston (2) and a piston exhaust valve (10). The crankcase chamber pressurization hole (2-1) communicates the cylinder air compression chamber (1-1) with the crankcase chamber (3-1), and the piston exhaust valve (10) is arranged in the crankcase chamber pressurization hole (2-1).
4. The high-pressure output air compressor according to claim 2, wherein: It further includes a crankcase intake valve (11). The crankcase intake valve (11) is arranged on the crankcase body (3), and the outlet port of the crankcase chamber pressurization pipe (9) is communicated with the crankcase chamber (3-1) through the crankcase intake valve (11).
5. A high-pressure output air compressor according to any one of claims 1 to 4, characterized in that: The compressor working chamber exhaust valve (7) is communicated with the crankcase chamber (3-1) through an oil-proof pipe (12), so that the position of the compressor working chamber exhaust valve (7) is higher than the height of the crankcase body (3), thereby preventing the lubricating oil in the crankcase chamber (3-1) from splashing into the compressor working chamber exhaust valve (7) when the crankshaft (4) rotates.