Air compressor

Abstract

The application provides an air compressor, which comprises an air compression pump, an air tank and an air inlet pipe. The air compression pump comprises a motor, a cylinder, a cylinder cover, a piston, a valve plate, a one-way valve and an air outlet chamber. The valve plate is provided with an air outlet hole for air outlet to the air outlet chamber. The one-way valve is used for one-way air supply of the air compression pump to the air tank. The air inlet pipe is located downstream of the one-way valve. The one-way valve comprises an elastic reset member and a valve core. At least a part of the valve core is made of rubber. At least a part of the valve core comprises a part of the valve core which can be in contact with the valve plate during reciprocating movement of the piston in the cylinder. The air inlet pipe is used for air supply to the air tank. The air inlet pipe is welded to the air tank. The air inlet pipe is in fluid communication between the inner cavity of the air tank and the air outlet chamber. The air compression pump supplies air to the air tank in one way through the one-way valve and the air inlet pipe. The inner cavity of the air tank and the air outlet chamber are always bidirectionally through. The design is beneficial to improve the mute performance of the air compressor.

Description

Technical Field

[0001] This invention relates to an air compressor having an air compression pump and an air tank. Background Technology

[0002] An air compressor is used to produce compressed air for use in pneumatic tools. An air compressor typically includes an air compressor pump, an air tank, and an air supply line connecting the air compressor pump and the air tank to deliver compressed air to the air tank. The air compressor pump typically includes a motor, cylinder, cylinder head, piston, valve plate, an outlet valve for opening and closing the outlet port on the valve plate, and an outlet chamber. Driven by the motor, the piston reciprocates within the cylinder to compress air and produce compressed air. The valve plate is located between the cylinder head and the piston, and the outlet chamber is formed between the valve plate and the cylinder head. The outlet port is used to supply air to the outlet chamber. During the air compressor pump's intake stroke (when the piston moves away from the valve plate), the outlet valve closes the outlet port; during the air compressor pump's compression stroke (when the piston moves towards the valve plate), the outlet valve opens under the pressure of the compressed air. The outlet valve plate is prone to wear and deformation, resulting in insufficient sealing, especially after prolonged use of the air compressor. Therefore, existing technology requires a check valve at the end of the air supply line near the air tank to prevent backflow and leakage of compressed air after shutdown. This combination of the outlet valve plate and check valve increases cost. Furthermore, the outlet valve plate typically needs to be mounted on the valve plate with screws and requires a limit switch to prevent excessive deformation and damage under compressed air pressure, further increasing cost. The outlet valve plate is usually made of stainless steel, and with the piston reciprocating within the cylinder, it repeatedly strikes the valve plate / limit switch, generating significant slapping noise. Therefore, existing technology needs improvement. Summary of the Invention

[0003] This patent application provides a technical solution for an air compressor that improves the noise reduction performance of the air compressor.

[0004] The air compressor disclosed in this patent application includes an air compression pump, an air tank, and an intake pipe. The air compression pump includes a motor, a cylinder, a cylinder head, a piston, a valve plate, a one-way valve, and an exhaust chamber. Driven by the motor, the piston reciprocates within the cylinder to compress the air between the piston and the valve plate, thereby producing compressed air. The valve plate is located between the cylinder head and the piston, and the exhaust chamber is formed between the valve plate and the cylinder head. The valve plate has an exhaust port for discharging air into the exhaust chamber. The one-way valve is used for unidirectional air delivery from the air compression pump to the air tank. The intake pipe is located downstream of the one-way valve. The one-way valve includes a resilient reset element and a valve core. The valve core can close the exhaust port under the force of the resilient reset element. The piston moves toward the valve plate, and the valve core, pushed by the compressed air, overcomes the force of the elastic reset member to open the air outlet, so that the compressed air can flow to the air outlet chamber through the air outlet. At least a portion of the valve core is made of rubber, and the at least a portion of the valve core includes the part of the valve core that can contact the valve plate during the reciprocating motion of the piston in the cylinder. The air inlet pipe is used to supply air to the air storage tank, and the air inlet pipe is welded to the air storage tank. The air inlet pipe is fluidly connected between the inner cavity of the air storage tank and the air outlet chamber. The air compressor pump supplies air unidirectionally to the air storage tank through the one-way valve and the air inlet pipe. The inner cavity of the air storage tank and the air outlet chamber are always bidirectionally connected.

[0005] Optionally, one end of the air intake pipe extends into the inner cavity of the air storage tank, the air intake pipe is configured as a straight pipe, and the mating direction of the air intake pipe and the air compressor pump is parallel to the length direction of the air intake pipe.

[0006] Optionally, one end of the intake pipe extends into the inner cavity of the air tank and is in direct fluid communication with the inner cavity of the air tank, and the other end of the intake pipe is connected to and in fluid communication with the air compressor pump. The air compressor pump also includes a sealing ring, and the air compressor pump includes an interface portion that is connected to the other end of the intake pipe. The sealing ring is used to seal between the interface portion and the other end of the intake pipe.

[0007] Optionally, the sealing ring is located inside the interface portion, and the opposite end of the intake pipe is inserted into the interface portion. The interface portion is provided on the cylinder head, and the cylinder head is also provided with a through hole. The through hole extends from the exhaust chamber to the interface portion. The exhaust chamber, the through hole, the intake pipe, and the inner cavity of the air tank are in sequential fluid communication. The compressed air can flow into the air tank sequentially through the exhaust hole, the exhaust chamber, the through hole, and the intake pipe.

[0008] Optionally, the interface portion is provided with an annular groove corresponding to the sealing ring, the sealing ring is partially embedded in the annular groove, the annular groove faces the gas storage tank, the annular groove surrounds the lower end of the through hole, and the air inlet pipe extends in the vertical direction.

[0009] Optionally, the interface portion is detachably connected to the opposite end of the intake pipe, and the interface portion is integrally formed on the cylinder head, forming part of the cylinder head; the cylinder head is located above the air tank, the interface portion is located on the lower side of the cylinder head and protrudes downward toward the air tank, the intake pipe extends vertically upward from the air tank, and the opposite end of the intake pipe forms the upper end of the intake pipe.

[0010] Optionally, the elastic reset element is a spring, which is located in the air outlet chamber. The spring is always in a compressed state and always exerts a resistance force on the valve core. The valve core can close the air outlet under the resistance force of the spring, and the valve core can overcome the resistance force of the spring and open the air outlet under the push of the compressed air. The valve core is located in the air outlet chamber.

[0011] Optionally, the air compressor further includes an intake chamber, at least one vent hole communicating with the intake chamber, and an intake valve plate. The intake chamber is formed between the valve plate and the cylinder head. The valve plate is also provided with an intake hole. The intake valve plate is used to control the closing and opening of the intake hole. The intake valve plate is located on the side of the valve plate facing the piston. As the piston moves away from the valve plate, the intake hole opens and the valve core closes the outlet hole; as the piston moves towards the valve plate, the intake valve plate closes the intake hole and the outlet hole opens; as the piston reciprocates within the cylinder... The air compressor pump allows air to flow sequentially through the at least one vent, the air inlet chamber, and into the space between the valve plate and the piston. The air entering the space between the valve plate and the piston can then flow sequentially through the air outlet, the air outlet chamber, and the air inlet pipe into the air storage tank. The air compressor pump also includes at least one baffle corresponding to the at least one vent. The baffle is used to block noise from propagating to the corresponding vent, thereby reducing noise propagation from the corresponding vent. The baffle is located inside the air inlet chamber and faces the corresponding vent, blocking it from the inside.

[0012] Optionally, the baffle wall is spaced apart from the corresponding vent hole, and the baffle wall is a V-shaped wall protruding towards the corresponding vent hole or an arc-shaped wall protruding towards the corresponding vent hole; the baffle wall is integrally formed on the valve plate and constitutes part of the valve plate; the vent hole is exposed on the outside of the cylinder head; the baffle wall is located between the air intake hole and the corresponding vent hole, and the baffle wall is away from the air intake hole and close to the corresponding vent hole.

[0013] Optionally, the at least one vent includes a first vent and a second vent, and the at least one baffle includes a first baffle corresponding to the first vent and a second baffle corresponding to the second vent, wherein the first vent, the first baffle, the second baffle, and the second vent are distributed sequentially in a straight line.

[0014] Optionally, the first baffle and the second baffle protrude in opposite directions. The first baffle protrudes toward the corresponding first vent hole, and the second baffle protrudes toward the corresponding second vent hole. The first vent hole, the first baffle, the second baffle, and the second vent hole are distributed sequentially on a straight line perpendicular to the air intake pipe, and the air intake pipe is vertically arranged.

[0015] Optionally, the air compressor is horizontally positioned above the air tank, the air intake pipe is vertically arranged, and the air intake pipe is perpendicular to the motor shaft. The air compressor also includes a first locking screw for locking the air intake valve plate onto the valve plate. The first locking screw includes a first end cap, which protrudes from the side of the valve plate facing the piston. The air compressor also includes a connecting rod for driving the piston. The piston includes a piston ring and a pressure plate. When the piston moves, the piston ring slides against the inner circumferential surface of the cylinder. The pressure plate is locked onto the connecting rod by a second locking screw. The pressure plate has a clearance groove. The pressure plate and one end of the connecting rod clamp the positioning piston ring. The second locking screw includes a second end cap and a screw portion integrally extended from the second end cap. The second end cap is located at the end of the screw portion closer to the first end cap and is accommodated in the clearance groove. When the piston moves to its closest point to the valve plate, the first end cap is at least partially accommodated in the clearance groove and does not contact the piston or the second end cap.

[0016] Optionally, the intake pipe is a rigid straight pipe, and the inside of the intake pipe is always bidirectionally connected to the one-way valve.

[0017] Optionally, the air compressor further includes an intake chamber and a sealing gasket. The intake chamber is formed between the valve plate and the cylinder head. The cylinder head includes a partition that separates the intake chamber and the outlet chamber. The sealing gasket is used to seal between the cylinder head and the valve plate. A portion of the sealing gasket is sandwiched between the partition and the valve plate for sealing between the partition and the valve plate. The valve plate includes a limiting portion corresponding to the valve core. The limiting portion is located in the outlet chamber and surrounds the valve core. The sealing gasket surrounds the periphery of the limiting portion.

[0018] Optionally, the cylinder head includes a first sidewall facing the valve plate, the limiting portion extends toward the first sidewall, and the end of the limiting portion near the first sidewall forms an air outlet opening toward the first sidewall. The elastic reset member is located in the air outlet chamber and is a conical spring. The conical spring is always in a compressed state and always exerts a resisting force on the valve core. The elastic reset member has a first end and a second end with opposite ends. The first end forms the small-diameter end of the elastic reset member and the second end forms the large-diameter end of the elastic reset member. The large-diameter end of the elastic reset member directly presses against the first sidewall. The limiting portion is a closed-loop annulus. The valve core includes several protruding ridges. The several protruding ridges are made of rubber and are distributed on the outer periphery of the valve core. The several protruding ridges protrude toward the limiting portion and are used to contact the limiting portion. When the valve core moves relative to the limiting portion, the several protruding ridges slide in cooperation with the inner peripheral surface of the limiting portion, and other parts of the valve core, except for the several protruding ridges, cannot contact the limiting portion.

[0019] Optionally, the one-way valve further includes an isolation ring for isolating the valve core from the elastic reset member, which is a spring. The isolation ring includes a gasket portion and a sleeve portion, which are integrally connected. The valve core includes a main body portion and an extension portion extending from the main body portion. The main body portion includes the plurality of protruding ridges. The limiting portion surrounds the main body portion and is used to close the vent. The extension portion is located on the side of the main body portion opposite to the piston. The first end surrounds the sleeve portion, and the sleeve portion is fitted onto the extension portion to isolate the extension portion from the first end. The gasket portion isolates the main body portion from the first end. The wear resistance of the isolation ring is greater than that of the valve core, and the valve core is made of rubber.

[0020] Optionally, the air compressor pump includes an interface portion that is detachably connected to the air intake pipe; a fixed bracket is welded onto the air tank, and the air compressor pump is locked onto the fixed bracket by several locking elements; as the air compressor pump is placed downwards onto the fixed bracket, the interface portion is connected downwards to the air intake pipe.

[0021] The one-way valve controlling the opening and closing of the air outlet in this design effectively ensures one-way air output from the air compressor pump to the air tank when the air compressor is working. After shutdown, the valve core closes the air outlet under the force of the elastic reset element, achieving good sealing of the air outlet and preventing compressed air from leaking from the air tank through the air outlet. This design, based on the arrangement of the one-way valve and the bidirectional connection between the inner cavity of the air tank and the air outlet chamber, eliminates the need for and avoids adding an extra one-way valve in the path of air pump output from the air compressor outlet chamber to the air tank compared to the prior art. The design eliminates the need for an outlet valve, thus reducing material and installation costs, and eliminating the significant slapping noise generated during valve operation. Furthermore, at least a portion of the valve core is made of rubber, including the area where the piston reciprocates within the cylinder, which contacts the valve plate. This reduces noise generated by the repeated opening and closing of the outlet port and the impact with the valve plate. In summary, this design improves the quietness of the air compressor and also helps reduce costs. Attached Figure Description

[0022] Figure 1 This is a perspective view of the air compressor of this application; Figure 2 This is another perspective view of the air compressor of this application; Figure 3 This is a vertical sectional view of the air compressor of this application (sectioned on the intake pipe). Figure 4 for Figure 3 A magnified view of the intake pipe and other parts of the vehicle. Figure 5 This is a horizontal sectional view of the air compressor of this application (sectioned on the air inlet). Figure 6 for Figure 5 A magnified view of the parts where the air intake and baffle are located; Figure 7 This is a view of the air compressor pump of the air compressor in this application after the air tank is separated from the air receiver (the housing is not shown). Figure 8 This is an exploded view of the air compressor pump, intake pipe, etc. of the air compressor of this application (components such as motors are not shown). Figure 9 An exploded view of a portion of the air compressor pump of the air compressor in this application;

[0023] Figure 10 This is an exploded view of another part of the air compressor pump of the air compressor of this application. Detailed Implementation

[0024] Reference Figures 1 to 10As shown, the air compressor 1 of this application includes an air compression pump 2, an air tank 10, and an air inlet pipe 11. The air compression pump 2 includes a motor 20, a cylinder 21, a cylinder head 22, a piston 23, a valve plate 24, a one-way valve 3, and an outlet chamber 250. Driven by the motor 20, the piston 23 reciprocates within the cylinder 21 to compress the air between the piston 23 and the valve plate 24, thereby producing compressed air. The valve plate 24 is located between the cylinder head 22 and the piston 23. The outlet chamber 250 is formed between the valve plate 24 and the cylinder head 22. The valve plate 24 has an outlet hole 240 for discharging air into the outlet chamber 250. The one-way valve 3 includes an elastic reset member 30 and a valve core 31. The one-way valve 3 is used for one-way air delivery from the air compression pump 2 to the air tank 10. The intake pipe 11 is located downstream of the one-way valve 3. The one-way valve 3 is used to control the opening and closing of the outlet port 240. (In this embodiment, the valve core 31 can block one end of the outlet port 240 under the force of the elastic reset member 30 to close the outlet port 240, and the valve core 31 can overcome the force of the elastic reset member 30 under the push of compressed air to open the outlet port 240.) The valve core 31 can close the outlet port 240 under the force of the elastic reset member 30. As the piston 23 moves toward the valve plate 24, the valve core 31 can overcome the force of the elastic reset member 30 under the push of compressed air to open the outlet port 240, so that the compressed air can flow to the outlet chamber 250 through the outlet port 240.

[0025] At least a portion of the valve core 31 is made of rubber. The at least a portion of the valve core 31 includes the part of the valve core 31 that can contact the valve plate 24 during the reciprocating motion of the piston 23 in the cylinder 21. This design helps to reduce the noise generated by the valve core 31 impacting the valve plate 24 during the process of repeatedly opening and closing the air outlet 240. The intake pipe 11 is used to supply air into the air storage tank 10. The intake pipe 11 is a rigid metal pipe, welded to the air storage tank 10. The intake pipe 11 is fluidly connected between the inner cavity 100 and the outlet chamber 250 of the air storage tank 10. The air compressor pump 2 supplies air unidirectionally into the air storage tank 10 through the one-way valve 3 and the intake pipe 11. The inner cavity 100 and the outlet chamber 250 of the air storage tank 10 are always bidirectionally connected. The one-way valve 3 and the air tank 10 are always bidirectionally connected. There are no other one-way valves or other one-way ventilation components between the inner cavity 100 of the air tank 10 and the one-way valve 3 and the outlet chamber 250. The one-way valve 3 plays a more significant role, preventing compressed air leakage in the air tank 10. If the one-way valve 3 fails, causing the outlet 240 to open, the compressed air in the air tank 10 can flow back through the inlet pipe 11, the outlet chamber 250, and the outlet 240, resulting in compressed air leakage. The inside of the inlet pipe 11 is always bidirectionally connected to the one-way valve 3.

[0026] In this embodiment, the motor 20 is a brushed motor 20, and the rated power of the motor 20 is between 90w and 3100w, preferably between 300w and 1900w.

[0027] One end of the intake pipe 11 extends into the inner cavity 100 of the air storage tank 10. The mating direction of the intake pipe 11 and the air compressor pump 2 is parallel to the central axis of the intake pipe 11. The intake pipe 11 is set as a straight pipe, and the mating direction of the intake pipe 11 and the air compressor pump 2 is parallel to the length direction of the intake pipe 11.

[0028] One end of the intake pipe 11 extends into the inner cavity 100 of the air tank 10 and is in direct fluid communication with the inner cavity 100 of the air tank 10. The other end of the intake pipe 11 is connected to and in fluid communication with the air compressor pump 2. The air compressor 1 also includes a sealing ring 12. The air compressor pump 2 includes an interface 220, which is connected to the other end of the intake pipe 11. The sealing ring 12 is used to seal between the interface 220 and the other end of the intake pipe 11 to prevent compressed air leakage.

[0029] The sealing ring 12 is located inside the interface portion 220. The opposite end of the intake pipe 11 is inserted into the interface portion 220. The interface portion 220 is provided on the cylinder head 22. The cylinder head 22 is also provided with a through hole 222, which extends from the exhaust chamber 250 to the interface portion 220. The exhaust chamber 250, the through hole 222, the intake pipe 11, and the inner cavity 100 of the air tank 10 are in sequential fluid communication. Compressed air can flow into the air tank 10 sequentially through the exhaust port 240, the exhaust chamber 250, the through hole 222, and the intake pipe 11. The inner diameter of the through hole 222 is smaller than the inner diameter of the interface portion 220.

[0030] The interface portion 220 is provided with an annular groove 2200 corresponding to the sealing ring 12. The sealing ring 12 is partially embedded in the annular groove 2200, which faces the gas tank 10. The annular groove 2200 surrounds the lower end 2220 of the through hole 222, and the air inlet pipe 11 extends in the vertical direction. With this design, the sealing ring 12 is in a stable position and has a compact layout.

[0031] The interface portion 220 is detachably connected to the opposite end of the intake pipe 11. The interface portion 220 is integrally formed on the cylinder head 22, forming part of the cylinder head 22. The cylinder head 22 is located above the air tank 10. The interface portion 220 is located on the lower side of the cylinder head 22 and protrudes downward toward the air tank 10. The intake pipe 11 extends vertically upward from the air tank 10. The opposite end of the intake pipe 11 forms the upper end of the intake pipe 11.

[0032] The air compressor 1 also includes a first pressure gauge 13, a second pressure gauge 14, a pressure regulating knob 15, a quick-connect coupling 16, and a housing 17. The first pressure gauge 13 is used to monitor the air pressure in the air tank 10, the quick-connect coupling 16 is used to supply air to the outside, the second pressure gauge 14 is used to monitor the output air pressure of the quick-connect coupling 16, the pressure regulating knob 15 is used to adjust the output air pressure of the quick-connect coupling 16, and the air compressor pump 2 is located inside the housing 17.

[0033] In this embodiment, the elastic reset member 30 is a spring. The elastic reset member 30 is located in the air outlet chamber 250. The elastic reset member 30 is always in a compressed state and always exerts a resistance force on the valve core 31. The valve core 31 can close the air outlet 240 under the resistance force of the elastic reset member 30, and the valve core 31 can overcome the resistance force of the elastic reset member 30 and open the air outlet 240 under the push of compressed air. The valve core 31 is located in the air outlet chamber 250.

[0034] The air compressor pump 2 also includes an intake chamber 251, at least one vent hole communicating with the intake chamber 251, and an intake valve plate 26. The intake chamber 251 is formed between the valve plate 24 and the cylinder head 22. The valve plate 24 is also provided with an intake hole 241. The intake valve plate 26 is used to control the closing and opening of the intake hole 241. The intake valve plate 26 is located on the side of the valve plate 24 facing the piston 23. As the piston 23 reciprocates in the cylinder 21, the intake valve plate 26 closes the intake hole 241 alternately, and the valve core 31 closes the outlet hole 240. As the piston 23 moves away from the valve plate 24, the intake hole 241 opens and the valve core 31 closes the outlet hole 240. As the piston 23 moves toward the valve plate 24, the intake valve plate 26 closes the intake port 241 and opens the outlet port 240. As the piston 23 reciprocates in the cylinder 21, air can flow sequentially through the at least one vent, the intake chamber 251, and the intake port 241 into the space between the valve plate 24 and the piston 23. The air entering the space between the valve plate 24 and the piston 23 can flow sequentially through the outlet port 240, the outlet chamber 250, and the intake pipe 11 into the air storage tank 10. A rubber gasket can also be provided at the intake port 241 of the valve plate 24 to contact the intake valve plate 26. When the intake valve plate 26 opens and closes, it strikes the rubber gasket to reduce noise.

[0035] As the piston 23 reciprocates within the cylinder 21, the intake valve plate 26 repeatedly strikes the valve plate 24, generating noise. The air compressor pump 2 also includes at least one baffle corresponding to the at least one vent hole. The baffle is located within the intake chamber 251, facing the corresponding vent hole and blocking its inner side. The baffle is used to prevent noise from propagating to the corresponding vent hole, thereby reducing noise transmission from the corresponding vent hole. In other words, the baffle is used to block noise from the corresponding vent hole, reducing noise transmission from the corresponding vent hole; the baffle is used for noise bounce or reflection, reducing the operating noise of the air compressor pump 2; more specifically, the baffle is used to prevent the striking noise generated by the intake valve plate 26 from propagating to the corresponding vent hole, thereby reducing the obstruction of the striking noise generated by the intake valve plate 26 from propagating from the corresponding vent hole; without the baffle, the noise can propagate from the corresponding vent hole with virtually no obstruction, resulting in greater operating noise from the air compressor 1.

[0036] The baffle wall is spaced opposite to the corresponding vent hole. The baffle wall protrudes towards the corresponding vent hole, and can be either a V-shaped wall protruding in a V-shape or an arc-shaped wall protruding in an arc shape towards the corresponding vent hole. This facilitates smoother diffusion of the air entering through the vent hole along the baffle wall. The baffle wall is integrally formed on the valve plate 24, constituting part of the valve plate 24. The vent hole is exposed on the outside of the cylinder head 22, and air from outside the cylinder head 22 directly enters the intake chamber 251 through the vent hole. The baffle wall is located between the intake hole 241 and the corresponding vent hole, away from the intake hole 241 and close to the corresponding vent hole. In this embodiment, there are two vent holes (first vent hole 270 and second vent hole 271) and two corresponding baffle walls. The two vent holes are located on opposite sides of the intake chamber 251, and the vent holes are mainly formed by the notch 221 on the cylinder head 22.

[0037] The at least one vent includes a first vent 270 and a second vent 271, and the at least one baffle includes a first baffle 242 corresponding to the first vent 270 and a second baffle 243 corresponding to the second vent 271. The first vent 270, the first baffle 242, the second baffle 243, and the second vent 271 are distributed sequentially in a straight line.

[0038] The first baffle 242 and the second baffle 243 protrude in opposite directions. The first baffle 242 protrudes toward the corresponding first vent 270, and the second baffle 243 protrudes toward the corresponding second vent 271. The first vent 270, the first baffle 242, the second baffle 243, and the second vent 271 are arranged sequentially on a straight line perpendicular to the air intake pipe 11, which is vertically arranged.

[0039] Optionally, the air compressor pump 2 also includes an intake chamber 251 and a sealing gasket 280. The cylinder head 22 includes a partition 223 that separates the intake chamber 251 from the exhaust chamber 250. The sealing gasket 280 is used to seal between the cylinder head 22 and the valve plate 24 to prevent air leakage from the exhaust chamber 250. A portion of the sealing gasket 280 is sandwiched between the partition 223 and the valve plate 24 to seal between the partition 223 and the valve plate 24. The valve plate 24 includes a limiting part 244 corresponding to the valve core 31. The limiting part 244 surrounds the valve core 31 and is located in the air outlet chamber 250. The air outlet 240 is adjacent to the space surrounded by the limiting part 244, and the sealing gasket 280 surrounds the periphery of the limiting part 244.

[0040] Cylinder head 22 includes a first sidewall 224 facing valve plate 24. A limiting portion 244 extends toward the first sidewall 224. The end of the limiting portion 244 near the first sidewall 224 forms an exhaust opening 2440 toward the first sidewall 224. An elastic reset member 30 is located in the exhaust chamber 250. The elastic reset member 30 is a conical spring. The elastic reset member 30 has a first end 300 and a second end 301 that are opposite to each other. The first end 300 constitutes the small-diameter end of the elastic reset member 30, and the second end 301 constitutes the large-diameter end of the elastic reset member 30. The large-diameter end of the elastic reset member 30 directly presses against the first sidewall 224. The sidewall 224 and the limiting part 244 are in the form of a closed ring. The valve core 31 includes a plurality of protruding ribs 3100. The plurality of protruding ribs 3100 are made of rubber. The plurality of protruding ribs 3100 are distributed on the outer periphery of the valve core 31. The plurality of protruding ribs 3100 protrude toward the limiting part 244. The plurality of protruding ribs 3100 are used to contact the limiting part 244. When the valve core 31 moves relative to the limiting part 244, the plurality of protruding ribs 3100 slide in cooperation with the inner peripheral surface of the limiting part 244, and other parts of the valve core 31, except for the plurality of protruding ribs 3100, cannot contact the limiting part 244.

[0041] The one-way valve 3 also includes an isolation ring 32, which isolates the valve core 31 from the elastic return member 30. The elastic return member 30 is a spring. The isolation ring 32 includes a gasket portion 320 and a sleeve portion 321, which are integrally connected. The valve core 31 includes a main body portion 310 and an extension portion 311 extending from the main body portion 310. The main body portion 310 includes the aforementioned plurality of protrusions 3100. The limiting portion surrounds the main body portion 310 and is used to close the vent 240. The extension portion 311 is located on the side of the main body portion 310 opposite to the piston 23. The first end 300 surrounds the sleeve portion 321, and the sleeve portion 321 is fitted onto the extension portion 311 to extend the valve core 310. The main body 310 is isolated from the first end 300, and the gasket 320 isolates the main body 310 from the first end 300. The first end 300 directly presses against the gasket 320, thereby indirectly pressing against the main body 310, which is conducive to the even pressure of the main body 310. The wear resistance of the isolation ring 32 is greater than that of the valve core 31. The valve core 31 is made of rubber, which helps to reduce the noise generated by the valve core 31 impacting the valve plate 24 during the repeated opening and closing of the vent 240. It also helps to improve the sealing performance of the valve core 31 for the vent 240. The valve core 31 can be made of FKM80 black fluorine material. The presence of the relatively wear-resistant isolation ring 32 helps to reduce the wear caused by the elastic reset member 30 on the valve core 31.

[0042] The air compressor pump 2 is horizontally positioned above the air tank 10. The intake pipe 11 is vertically arranged and perpendicular to the shaft 200 of the motor 20, which is horizontally positioned. The air compressor pump 2 also includes a first locking screw 281 that locks the intake valve plate 26 onto the valve plate 24. The first locking screw 281 includes a first end cap 2810, which protrudes from the side of the valve plate 24 facing the piston 23. The air compressor pump 2 also includes a connecting rod 294 for driving the piston 23. The piston 23 includes a piston ring 230 and a pressure plate 231. When the piston 23 moves, the piston ring 230 slides against the inner circumferential surface of the cylinder 21. The pressure plate 231 has a clearance groove 2310. The pressure plate 231 is locked onto the connecting rod 294 by a second locking screw 282. The pressure plate 231 and one end of the connecting rod 294 clamp and position the piston ring 230. The second locking screw 282... The piston 23 is equipped with a second end cap 2820 and a screw portion 2821 extending integrally from the second end cap 2820. The second end cap 2820 is located at the end of the screw portion 2821 closest to the first end cap 2810 and is accommodated in a relief groove 2310. When the piston 23 moves to the closest point to the valve plate 24, the first end cap 2810 is at least partially accommodated in the relief groove 2310 and does not contact the piston 23 and the second end cap 2820. The piston 23 and the second locking screw 282 use the relief groove 2310 to avoid the first end cap 2810, thus preventing the piston 23 and the second end cap 2820 from colliding with the first end cap 2810. This also helps the piston 23 to be as close as possible to the valve plate 24 at the end of the compression stroke, reducing the amount of compressed air remaining between the piston 23 and the valve plate 24 at the end of the compression stroke and improving the output efficiency of compressed air. The intake valve plate 26 can be made of stainless steel.

[0043] A fixed bracket 283 is welded onto the air tank 10. The air compressor pump 2 is locked onto the fixed bracket 283 by several locking elements 284, which can be screws or bolts. As the air compressor pump 2 is placed downwards onto the fixed bracket 283, the interface 220 is aligned downwards and connected to the air intake pipe 11. This design allows for very quick assembly of the air compressor pump 2 and the air intake pipe 11. The fixed bracket 283 is provided with several locking holes 2830 corresponding to the locking elements 284.

[0044] The air compressor pump 2 also includes a pump bracket 290, a pulley 291 driven by a motor 20, a belt 292, and a flywheel 293. The piston 23 is located at the end of the connecting rod 294. The pulley 291 is fixed on the rotating shaft 200 of the motor 20. The pulley 291 drives the flywheel 293 to rotate through the belt 292. The flywheel 293 drives the connecting rod 294 to move. The connecting rod 294 drives the piston 23 to reciprocate in the cylinder 21. The flywheel 293 is provided with an eccentric shaft, which is movably connected to the connecting rod 294 through a bearing. The cylinder 21 and the valve plate 24 are fixed on the pump bracket 290. The plurality of locking elements 284 lock the fixed bracket 283 and the pump bracket 290 together.

[0045] Air compressor 1 uses AC mains power as its power source. Air compressor 1 is equipped with a power cord 18 and a switch 19 for connecting to AC mains power. In other designs, air compressor 1 can be powered by a battery pack, for example, air compressor 1 can be powered by a lithium battery pack, which can further improve its ease of use and is not limited by the length of the power cord 18. The switch 19 is used to control the start and stop of air compressor 1. The switch 19 is exposed on the outside of the housing 17.

Claims

1. An air compressor, characterized in that: The system includes an air compressor pump, an air tank, and an intake pipe. The air compressor pump includes a motor, a cylinder, a cylinder head, a piston, a valve plate, a one-way valve, and an exhaust chamber. Driven by the motor, the piston reciprocates within the cylinder to compress the air between the piston and the valve plate, producing compressed air. The valve plate is located between the cylinder head and the piston, and the exhaust chamber is formed between the valve plate and the cylinder head. The valve plate has an exhaust port for discharging air into the exhaust chamber. The one-way valve is used for unidirectional air delivery from the air compressor pump to the air tank. The intake pipe is located downstream of the one-way valve. The one-way valve includes a resilient reset element and a valve core. The valve core can close the exhaust port under the force of the resilient reset element. As the piston moves... The valve plate moves, and the valve core, pushed by the compressed air, overcomes the force of the elastic reset member to open the air outlet, so that the compressed air can flow to the air outlet chamber through the air outlet. At least a portion of the valve core is made of rubber, and the at least a portion of the valve core includes the part of the valve core that can contact the valve plate during the reciprocating motion of the piston in the cylinder. The air inlet pipe is used to supply air to the air storage tank, and the air inlet pipe is welded to the air storage tank. The air inlet pipe is fluidly connected between the inner cavity of the air storage tank and the air outlet chamber. The air compressor pump supplies air unidirectionally to the air storage tank through the one-way valve and the air inlet pipe. The inner cavity of the air storage tank and the air outlet chamber are always bidirectionally connected.

2. The air compressor according to claim 1, characterized in that: One end of the air intake pipe extends into the inner cavity of the air storage tank. The air intake pipe is configured as a straight pipe, and the mating direction between the air intake pipe and the air compressor pump is parallel to the length direction of the air intake pipe.

3. The air compressor according to claim 1, characterized in that: One end of the intake pipe extends into the inner cavity of the air tank and is in direct fluid communication with the inner cavity of the air tank. The other end of the intake pipe is connected to and in fluid communication with the air compressor pump. The air compressor pump also includes a sealing ring. The air compressor pump includes an interface portion, which is connected to the other end of the intake pipe. The sealing ring is used to seal between the interface portion and the other end of the intake pipe.

4. The air compressor according to claim 3, characterized in that: The sealing ring is located inside the interface portion, and the opposite end of the intake pipe is inserted into the interface portion. The interface portion is provided on the cylinder head, and the cylinder head is also provided with a through hole. The through hole extends from the exhaust chamber to the interface portion. The exhaust chamber, the through hole, the intake pipe, and the inner cavity of the air tank are in sequential fluid communication. The compressed air can flow into the air tank sequentially through the exhaust hole, the exhaust chamber, the through hole, and the intake pipe.

5. The air compressor according to claim 4, characterized in that: The interface portion is provided with an annular groove corresponding to the sealing ring, the sealing ring is partially embedded in the annular groove, the annular groove faces the gas storage tank, the annular groove surrounds the lower end of the through hole, and the air inlet pipe extends in the vertical direction.

6. The air compressor according to claim 3, characterized in that: The interface portion is detachably connected to the opposite end of the intake pipe. The interface portion is integrally formed on the cylinder head and constitutes part of the cylinder head. The cylinder head is located above the air tank. The interface portion is located on the lower side of the cylinder head and protrudes downward toward the air tank. The intake pipe extends vertically upward from the air tank. The opposite end of the intake pipe constitutes the upper end of the intake pipe.

7. The air compressor according to claim 1, characterized in that: The elastic reset element is a spring, which is located in the air outlet chamber. The spring is always in a compressed state and always exerts a resistance force on the valve core. The valve core can close the air outlet under the resistance force of the spring, and the valve core can overcome the resistance force of the spring and open the air outlet under the push of the compressed air. The valve core is located in the air outlet chamber.

8. The air compressor according to claim 1, characterized in that: The air compressor pump further includes an intake chamber, at least one vent hole communicating with the intake chamber, and an intake valve plate. The intake chamber is formed between the valve plate and the cylinder head. The valve plate is also provided with an intake hole. The intake valve plate is used to control the closing and opening of the intake hole. The intake valve plate is located on the side of the valve plate facing the piston. As the piston moves away from the valve plate, the intake hole opens and the valve core closes the outlet hole; as the piston moves towards the valve plate, the intake valve plate closes the intake hole and the outlet hole opens; as the piston reciprocates within the cylinder… Air can flow sequentially through the at least one vent, the air inlet chamber, and into the space between the valve plate and the piston. The air entering the space between the valve plate and the piston can flow sequentially through the air outlet, the air outlet chamber, and the air inlet pipe into the air storage tank. The air compressor pump also includes at least one baffle corresponding to the at least one vent. The baffle is used to block noise from propagating to the corresponding vent, thereby reducing the noise from being transmitted out of the corresponding vent. The baffle is located in the air inlet chamber and faces the corresponding vent, blocking it from the inside of the corresponding vent.

9. The air compressor according to claim 8, characterized in that: The baffle wall is spaced apart from the corresponding vent hole. The baffle wall is either a V-shaped wall protruding towards the corresponding vent hole or an arc-shaped wall protruding towards the corresponding vent hole. The baffle wall is integrally formed on the valve plate and constitutes part of the valve plate. The vent hole is exposed on the outside of the cylinder head. The baffle wall is located between the air intake hole and the corresponding vent hole, and the baffle wall is away from the air intake hole and close to the corresponding vent hole.

10. The air compressor according to claim 8, characterized in that: The at least one vent includes a first vent and a second vent, and the at least one baffle includes a first baffle corresponding to the first vent and a second baffle corresponding to the second vent. The first vent, the first baffle, the second baffle, and the second vent are distributed sequentially in a straight line.

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