Air compressor structure for prolonging the life of wear parts

Abstract

The utility model discloses air compressor structure of prolonging the life of wearing part, including gas holder and air compressor head, and air compressor head includes motor assembly and the box of both sides, and there is first inner chamber in the box, is equipped with crank and fan blade in first inner chamber, and the top of box is equipped with extension wall, and extension wall encloses a circle and forms second inner chamber in the inside, and is equipped with the pass in between second inner chamber and the first inner chamber below, and cylinder assembly is installed in second inner chamber, and cylinder assembly includes cylinder body, cylinder cover and valve plate, and cylinder body is connected with the pass, and the upper end of connecting rod is inserted into cylinder body and is connected with piston, and the top of extension wall is installed with the box cover, and the first airflow channel is formed between cylinder body and extension wall, and first vent is equipped between first inner chamber and second inner chamber, and first vent connects first airflow channel, and first fin is equipped outside cylinder body, and first fin sets up vertically and is in first airflow channel, and this patent can improve the heat dissipation of cylinder body.

Description

Technical Field

[0001] This utility model relates to an air compressor, and more particularly to an air compressor structure that extends the life of worn parts. Background Technology

[0002] Air compressors, as power sources for providing clean air, were initially mainly used for oxygen production, nitrogen production, and the delivery of specialty gases. With the gradual maturation of oil-free lubrication technology, the market demand and application areas of oil-free compressors have rapidly expanded. They are widely used in industries such as automatic control, analytical instruments, beauty and health care, fiber optic air supply, food preservation, water treatment for ocean-going vessels, advertising production, aquaculture, emergency vehicle rescue, fatigue driving mitigation, mobile oxygen stations for trains, oxygen supply for outdoor activities, oxygen production in high-altitude areas, and food preservation in car refrigerators. Oil-free silent air compressors are miniature reciprocating compressors. When the motor drives the compressor crankshaft to rotate, the piston, which is self-lubricating and requires no added lubricant, reciprocates through the connecting rod. The working volume formed by the cylinder wall, cylinder head, and piston top surface changes periodically.

[0003] For example, patent CN215109359U discloses a noise reduction structure for an air compressor, including a cylinder head, a valve plate, a cylinder, a pressure plate, a connecting rod, and a housing. The connecting rod is installed inside the housing, and one end of the connecting rod is provided with a noise reduction medium. The pressure plate is installed above the noise reduction medium, and the cylinder is installed above the pressure plate. A valve plate is installed at the outlet of the housing, and the cylinder head is installed above the valve plate. An exhaust valve is provided on the valve plate, and an intake valve is provided on the pressure plate. A piston cup is provided at the connection between the pressure plate and the noise reduction medium, a cylinder sealing ring is provided at the connection between the cylinder and the valve plate, and a cylinder head sealing ring is provided at the connection between the cylinder head and the valve plate. During operation, the piston assembly composed of the pressure plate and the piston cup moves up and down in the cylinder to compress the gas.

[0004] For example, the silent oil-free air compressor disclosed in patent CN203297059U includes a crankcase and a motor. The motor has a rotor, and the crankcase has a crank. The motor's drive shaft extends into the crankcase, and the crank is mounted on the part of the motor's drive shaft that extends into the crankcase. A cylinder is located at the top of the crankcase, and a vertical connecting rod is located inside the cylinder. One end of the vertical connecting rod is connected to the piston of the cylinder, and the other end is connected to the motor's drive shaft. A fan blade is located on the part of the motor's drive shaft that extends into the crankcase. A cylinder head is located on the cylinder, and a cup, valve components, and a rubber sealing ring are located between the cylinder and the cylinder head. When the motor is working, the connecting rod drives the piston to move up and down reciprocally inside the cylinder.

[0005] The existing air compressor has a problem: when the piston moves up and down in the cylinder, the friction between the piston and the inner wall of the cylinder generates heat, resulting in a high cylinder temperature. A high cylinder temperature will affect the working efficiency of compressed air and the life of the piston. Utility Model Content

[0006] Based on the above-mentioned problem that the piston generates heat by reciprocating up and down in the cylinder and rubbing against the inner wall of the cylinder, resulting in a high temperature in the cylinder, which affects the working efficiency of compressed air and the life of the piston, this utility model provides an air compressor structure that extends the life of wear parts.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an air compressor structure for extending the service life of wear parts, including an air tank and an air compressor head for compressing gas into the air tank. The air compressor head includes a motor assembly and a housing fixed on both sides of the motor assembly. A first inner cavity is formed inside the housing. A crank and a fan blade are provided in the first inner cavity. The axial sides of the motor assembly extend into the first inner cavity. The crank and the fan blade are connected to the shaft. The top of the housing is provided with an extension wall that extends vertically upward. The extension wall forms a circle and forms a second inner cavity with an upward opening inside. A through-hole is provided between the second inner cavity and the first inner cavity below. A cylinder assembly is installed in the second inner cavity. The cylinder assembly includes a cylinder body, a cylinder head, and a valve plate. The cylinder head is located on top of the cylinder body. The valve plate is located between the cylinder head and the cylinder body. The cylinder body is connected to the through-hole. The cylinder has a piston chamber, a connecting rod connected to the crank, the upper end of the connecting rod extending into the piston chamber and connected to the piston, a cover covering the cylinder assembly is installed on the upper part of the extension wall, a side cover is installed on the side of the housing away from the motor assembly, a vertically distributed first airflow channel is formed between the cylinder and the inner wall of the extension wall and the cover, a first ventilation port is provided between the first inner cavity and the second inner cavity, the first ventilation port is connected to the first airflow channel, the first airflow driven by the fan blades enters the first airflow channel through the first ventilation port and flows into the cover through the first airflow channel, the cover is provided with an air outlet, the cylinder is provided with a first heat sink for cooling the cylinder, the first heat sink is vertically arranged and located in the first airflow channel, and an air duct for upward airflow is formed between adjacent first heat sinks.

[0008] A further preferred embodiment of this invention is that the first heat sink is disposed on the outer peripheral surface of the cylinder body.

[0009] A further preferred embodiment of this utility model is as follows: a heat dissipation sleeve is provided on the outside of the cylinder body, and a first heat dissipation fin is provided on the outer peripheral surface of the heat dissipation sleeve. The heat dissipation sleeve is used to receive the heat of the cylinder body and dissipate the heat from the first heat dissipation fin.

[0010] A further preferred embodiment of this utility model is as follows: the first heat sink includes a root and a body portion. The outer end of the root is provided with a side opening and a top opening for the insertion hole. The inner end of the body portion is provided with a connecting portion that mates with the insertion hole. The connecting portion can slide downward into the insertion hole from the top opening of the insertion hole, and the body portion extends out from the side opening of the insertion hole. One or more body portions can be inserted into the insertion hole, or a spacer for separating two upper and lower body portions can also be inserted into the insertion hole. The outer end of the body portion is provided with at least one thin sheet for heat dissipation. The thin sheet is vertically arranged, and the thickness of the thin sheet is less than the thickness of the root and the body portion.

[0011] A further preferred embodiment of this utility model is: an internal thread can be provided at the top opening of the insertion hole, and a plug is threadedly connected to the top opening of the insertion hole to seal the top opening.

[0012] A further preferred embodiment of this invention is that an elastic rubber plug can be inserted into the top opening of the socket, and the elastic rubber plug is interference-fitted with the inner wall of the socket.

[0013] A further preferred embodiment of this utility model is as follows: the socket is a C-shaped socket with a closed bottom, the connecting part is a column adapted to the shape of the C-shaped socket, and the spacer is also a column adapted to the shape of the C-shaped socket.

[0014] A further preferred technical solution of this utility model is as follows: a ring-shaped or combined ring-shaped support rib is provided between the first inner cavity and the second inner cavity. The support rib surrounds the opening. The top of the support rib is provided with a rim. The rim and the support rib combine to form a circular positioning groove. The lower end of the cylinder body is inserted into the positioning groove and abuts against the support rib. The valve plate and the cylinder cover are arranged sequentially above the cylinder body and fixed to the extension wall by screws. The support rib is fixedly connected to the inner wall surface of the extension wall by connecting ribs. The first ventilation opening is formed between two adjacent connecting ribs. The first ventilation opening surrounds the outside of the opening.

[0015] A further preferred embodiment of this utility model is: the side cover is provided with an air inlet that communicates with the first inner cavity.

[0016] A further preferred embodiment of this utility model is as follows: the four peripheral edges of the valve plate extend beyond the cylinder body, and the extended portion blocks at least a portion of the upper opening of the first airflow channel. The valve plate is provided with a second vent opposite to the upper opening of the first airflow channel. The second vent is used to supply air to blow towards the cylinder head. The cylinder head is provided with a second heat sink for heat dissipation.

[0017] Compared with the prior art, the advantage of this utility model is that a vertically extending wall is provided on the top of the box, forming a circle and creating a second inner cavity with an upward opening. The second inner cavity is connected to the first inner cavity inside the box through a passage. The cylinder assembly is installed in the second inner cavity. A vertically distributed first airflow channel is formed between the cylinder body of the cylinder assembly and the inner wall of the extending wall, which is connected to the box cover. A first vent is provided between the first inner cavity and the second inner cavity, and the first vent is connected to the first airflow channel. When the fan blades rotate, the first airflow driven by the fan enters the first airflow channel through the first vent and flows into the box cover. The box cover is provided with an air outlet. The passing first airflow can carry away the heat on the cylinder body. Furthermore, the first airflow channel formed between the extended wall and the cylinder body can act as a wind duct structure, making the upward airflow more concentrated, thereby achieving a better heat dissipation effect on the cylinder body. At the same time, a first heat sink for cylinder body heat dissipation is set on the outside of the cylinder body. The first heat sink is vertically set and located in the first airflow channel. An air duct for upward airflow is formed between adjacent first heat sinks. The first airflow generated when the fan blades rotate passes through the air duct. The first heat sink can increase the contact area with the air, so that the airflow can carry away more heat, thereby achieving a better heat dissipation effect and cooling the cylinder body. This avoids the working efficiency of compressed air and the piston life of the reciprocating motion inside the piston chamber due to excessive cylinder body temperature.

[0018] In addition, when the fan blades rotate, a second airflow is generated that enters the piston chamber from the inlet, and the second airflow cools the inside of the cylinder. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the overall structure of the air compressor;

[0021] Figure 2 This is a schematic diagram of the air compressor head.

[0022] Figure 3 This is a cross-sectional view of the air compressor head;

[0023] Figure 4 for Figure 3 Enlarged view of a portion at point A;

[0024] Figure 5 This is a diagram illustrating the disassembly of the box lid;

[0025] Figure 6 This is a schematic diagram of the cylinder assembly being disassembled.

[0026] Figure 7 This is a schematic diagram of the cylinder body installed in the second inner cavity;

[0027] Figure 8 This is a schematic diagram of the internal structure of the second inner cavity of the box.

[0028] Figure 9 A schematic diagram of a heat sink structure;

[0029] Figure 10 This is a schematic diagram of the second type of heat sink structure;

[0030] Figure 11 This is a schematic diagram of the heat sink after the heat dissipation plate part has been removed.

[0031] Figure 12 This is a schematic diagram of the sheet body structure;

[0032] Figure 13 This is a schematic diagram of the spacer structure.

[0033] In the diagram: 1. Air tank; 2. Air compressor head; 3. Motor assembly; 4. Housing; 5. Side cover; 6. Air inlet; 7. Extension wall; 8. Housing cover; 9. Air outlet; 10. Fan blade; 11. Crank; 12. Shaft; 13. Connecting rod; 14. Piston; 15. Cylinder assembly; 16. Piston chamber; 17. First inner cavity; 18. Cylinder head; 19. Valve plate; 20. Heat sink; 21. First heat sink fin; 22. ... 23. First airflow channel; 24. Second heat sink; 25. Second airflow; 26. Cylinder body; 27. Fixing base; 28. Connecting rib; 29. ​​Supporting rib; 30. Surrounding edge; 31. Through-hole; 32. Root; 33. Insertion hole; 34. Connecting part; 35. Plate part; 36. Spacer; 37. Thin plate; 38. Air duct; 39. Clearance space; 40. Disassembly hole; 41. Second inner cavity. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0035] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0036] Figures 1-13As shown, an air compressor structure for extending the life of worn parts includes an air tank 1 and an air compressor head 2 for compressing gas into the air tank 1. The air compressor head 2 includes a motor assembly 3 and a housing 4 fixed on both sides of the motor assembly 3. A first inner cavity 17 is formed inside the housing 4. A crank 11 and a fan blade 10 are provided in the first inner cavity 17. The shaft 12 of the motor assembly 3 extends into the first inner cavity 17 on both sides. The crank 11 and the fan blade 10 are connected to the shaft 12 and can be driven by the shaft 12. The top of the housing 4 is provided with an extension wall 7 extending vertically upward. The extension wall 7 forms a cavity that is closed on all sides and has an opening at the top. The interior of the extension wall 7 forms a second inner cavity 41 with an upward opening. A through-hole 3 is provided between the second inner cavity 41 and the first inner cavity 17 below. 1. The port 31 connects the first inner cavity 17 and the second inner cavity 41. The second inner cavity 41 contains a cylinder assembly 15. The cylinder assembly 15 includes a cylinder body 26, a cylinder head 18, and a valve plate 19. The cylinder head 18 is located on top of the cylinder body 26. The valve plate 19 is located between the cylinder head 18 and the cylinder body 26. The cylinder body 26 is connected to the port 31. A piston chamber 16 is formed inside the cylinder body 26. A connecting rod 13 is connected to the crank 11. The upper end of the connecting rod 13 extends into the piston chamber 16 and is connected to the piston 14. A cover 8 is installed above the extension wall 7 to cover the cylinder assembly 15. A side cover 5 is installed on the side of the housing 4 away from the motor assembly 3. When the motor assembly 3 is working, the shaft 12 drives the crank 11 and the fan blade 10 to move, thereby causing the connecting rod 13 to drive the piston 14 to reciprocate in the piston chamber 16 to perform compression work. The difference in this patent lies in the heat dissipation structure of the cylinder 26. The working principle of the air compressor and other structures are the same as those of existing air compressors.

[0037] Figure 3 , Figure 4 , Figure 7 As shown, there is a gap between the cylinder body 26 and the inner wall of the extension wall 7 to form a vertically distributed first airflow channel 23 between the cylinder body 26 and the extension wall 7, which connects to the interior of the upper cover 8. A first ventilation port 22 is provided between the first inner cavity 17 and the second inner cavity 41. The first ventilation port 22 is connected to the lower end of the first airflow channel 23. When the fan blade 10 rotates, the first airflow driven by the rotation of the fan blade 10 rises through the first ventilation port 22 and enters the first airflow channel 23, and flows into the cover 8 through the first airflow channel 23. The cover 8 is provided with an air outlet 9. The cylinder body 26 is provided with a first heat sink 21 for heat dissipation. The first heat sink 21 is vertically arranged and located in the first airflow channel 23. An air duct 38 is formed between adjacent first heat sinks 21 to allow air to pass upward.

[0038] This patent utilizes the rotation of the fan blade 10 to create an upward airflow within the first inner cavity 17. This airflow enters the first airflow channel 23 through the first vent 22, flows into the housing cover 8 via the first airflow channel 23, and finally exits from the air outlet 9 on the housing cover 8. The airflow passing through the first airflow channel 23 carries away heat from the cylinder body 26. Furthermore, the first airflow channel 23 formed between the extended wall 7 and the cylinder body 26 acts as a guide tube, concentrating the upward airflow passing outside the cylinder body 26 for better heat dissipation. Simultaneously, a [further details about the design and installation of the airflow channel are missing from the original text]. A first heat sink 21 is placed for heat dissipation of the cylinder 26. The first heat sink 21 is vertically arranged and located in the first airflow channel 23. An air duct 38 is formed between adjacent first heat sinks 21 to allow air to pass upward. The first airflow generated when the fan blade 10 rotates passes through the air duct 38. The first heat sink 21 can increase the contact area with the air, so that the air can carry away more heat when it passes, thereby achieving a better heat dissipation effect and cooling the cylinder 26. This avoids the working efficiency of compressed air and the life of the piston 15 reciprocating inside the piston chamber 16 due to the excessive temperature of the cylinder 26.

[0039] In addition, when the fan blade 10 rotates, it can also generate a second airflow that enters the piston chamber 16 from the port 31 upwards, and the second airflow cools the inside of the cylinder 26.

[0040] Figures 6-8 As shown, a ring-shaped or combined ring-shaped support rib 29 is provided between the first inner cavity 17 and the second inner cavity 41. The support rib 29 surrounds the above-mentioned opening 31. The top of the support rib 29 is provided with a surrounding edge 30. The surrounding edge 30 and the support rib 29 combine to form a circular positioning groove. The lower end of the cylinder body 26 is inserted into the positioning groove and abuts against the support rib 29. The valve plate 19 and the cylinder cover 18 are arranged above the cylinder body 26 in sequence and fixed to the extension wall 7 by screws. When the valve plate 19 and the cylinder cover 18 are fixedly connected to the extension wall 7 by screws, the valve plate 19 presses the cylinder body 26 tightly into the positioning groove and fixes it. The support rib 29 is fixedly connected to the inner wall surface of the extension wall 7 by connecting ribs 28. The above-mentioned first ventilation opening 22 is formed between two adjacent connecting ribs 28. The first ventilation opening 22 surrounds the outside of the opening 31.

[0041] Specifically, there are four corners of the cavity enclosed by the extension wall 7 with inward protrusion of fixing seats 27. The cylinder head 18 is provided with four corresponding connecting seats. Screws pass through the connecting seats and the valve plate 19 and connect to the fixing seats 27, fixing the valve plate 19 and the cylinder head 18 to the housing 4.

[0042] Due to the connection between the valve plate 19 and the fixed base 27, the four edges of the valve plate 19 extend beyond the cylinder body 26, and the extended part blocks at least a portion of the upper opening of the first airflow channel 23. The valve plate 19 is provided with a second vent 25 opposite to the upper opening of the first airflow channel 23. The second vent 25 is used to supply air to blow towards the cylinder head 18. The cylinder head 18 is provided with a second heat sink 24 for heat dissipation. Thus, when the fan blade 10 rotates, the first airflow passing upward through the first airflow channel 23 dissipates heat to the cylinder body 26 and the cylinder head 18 in sequence.

[0043] Figure 5 As shown, the aforementioned cover 8 is fixedly connected to the cylinder head 18 by screws.

[0044] The side cover 5 is provided with an air inlet 6 that communicates with the first inner cavity 17. When the fan blade 10 rotates, external air enters the first inner cavity 17 through the air inlet 6.

[0045] The first heat sink 21 is disposed on the outer peripheral surface of the cylinder block 26.

[0046] Figures 3-13 As shown, or in another configuration, a heat dissipation sleeve 20 is fitted over the cylinder body 26. A first heat dissipation fin 21 is disposed on the outer circumferential surface of the heat dissipation sleeve 20. The heat dissipation sleeve 20 is used to receive heat from the cylinder body 26 and dissipate heat from the first heat dissipation fin 21. When the heat dissipation sleeve 20 is installed, it rests against the aforementioned perimeter 30. The heat dissipation sleeve 20 is made of a thermally conductive material, such as copper or aluminum alloy.

[0047] Since the cylinder 26 is installed inside the extension wall 7, in order to adapt to the concave and convex structure inside the second inner cavity 41, the protrusions specially set inside can be configured to install the first heat sink 21 in a modular manner.

[0048] Figures 10-13 As shown, for example, the first heat sink 21 includes a root portion 32 and a body portion 35. One side of the inner end of the root portion 32 is formed on the outer wall of the cylinder 26 or the outer wall of the heat sink sleeve 20. The outer end of the root portion 32 is provided with a side portion and a top opening of the insertion hole 33. The inner end of the body portion 35 is provided with a connecting portion 34 that cooperates with the insertion hole 33. The connecting portion 34 can slide downward from the top opening of the insertion hole 33 and be inserted into the insertion hole 33. The body portion 35 extends out from the side opening of the insertion hole 33. One or more body portions 35 can be inserted into the insertion hole 33, or a spacer 36 for separating the upper and lower body portions 35 can also be inserted into the insertion hole 33. The outer end of the body portion 35 is provided with at least one thin plate 37 for heat dissipation. The thin plate 37 is vertically arranged. The thickness of the thin plate 37 is less than the thickness of the root portion 32 and the body portion 35. Preferably, there are two thin plates 37. By making the thin sheet 37 thinner, multiple spaced thin sheets 37 can be provided at the end of the sheet body 35. The thin sheet 37 can increase the contact area with air, thereby improving heat dissipation efficiency.

[0049] Additionally, the plate portion 35 and the spacer 36 can be matched according to the internal structure of the second inner cavity 41. For example, the spacer 36 can be set opposite to the position of the protruding part, so that the position of the heat sink forms a clearance space 39 to avoid the protruding part. The spacer 36 is spaced between the two plate portions 35 so that the plate portion 35 can be set below and above the protruding part for heat dissipation. During installation, the cylinder 26 can be rotated first to make the root 32 misaligned with the protruding part, and then the plate portion 35 and the spacer 36 can be assembled like building blocks. 6. Slide the insert into the socket 33 in sequence, with the spacer 36 at the same height as the protruding part. After placement, rotate the cylinder 26 so that the root 32 is opposite the protruding part, thus enabling the heat sink to be installed at both the upper and lower positions of the protruding part. Then, insert the plate part 35 into the root 32 where there is no interference with the other protruding parts to complete the installation of the first heat sink 21. The installation structure of the first heat sink 21 facilitates the installation of the cylinder 26 or heat sink sleeve 20 with the first heat sink 21, avoiding the inability to install due to interference. Plate parts 35 of different lengths can also be installed to adapt to different assembly environments.

[0050] The closed structure at the top of the socket 33 can be provided with an internal thread at the top opening of the socket 33. A plug is threadedly connected to the top opening of the socket 33 to seal the top opening. When it is necessary to remove the spacer 36 or the plate part 35, the plug can be unscrewed.

[0051] Alternatively, an elastic rubber plug can be inserted into the top opening of the socket 33. The elastic rubber plug is interference-fitted with the inner wall of the socket 33, and the elastic rubber plug limits the sheet portion 35 and / or the spacer 36 within the socket 33. The elastic rubber plug can be removed during disassembly.

[0052] Preferably, the socket 33 is a C-shaped socket with a closed bottom, the connecting part 34 is a column that matches the shape of the C-shaped socket, and the spacer 36 is also a column that matches the shape of the C-shaped socket. The dimensions of the connecting part 34 and the spacer 36 are larger than the side opening size of the socket 33. In order to facilitate the removal of the spacer 36, a disassembly hole 40 can be provided on the side wall of the spacer 36 for inserting a tool to move the spacer 36.

[0053] The aforementioned fan blade 10 does not blow directly onto the first vent 22 and the opening 31. The rotation of the fan blade 10 causes air from outside the housing 4 to enter the first inner cavity 17. The air then flows into the cylinder 26 from the first vent 22 and the opening 31 and into the cylinder 26. The air blowing into the first airflow channel 23 and the cylinder 26 is generated by the air overflowing from the first inner cavity 17 due to the rotation of the fan blade 10. The fan blade 10 is the power source for the aforementioned airflow.

[0054] The above describes the air compressor structure for extending the life of wear parts provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An air compressor structure for extending the life of worn parts, comprising an air tank and an air compressor head for compressing gas into the air tank, the air compressor head comprising a motor assembly and a housing fixed on both sides of the motor assembly, a first inner cavity formed within the housing, a crank and a fan blade disposed within the first inner cavity, the axial sides of the motor assembly extending into the first inner cavity, the crank and the fan blade connected to a shaft, an extension wall extending vertically upwards at the top of the housing, the extension wall forming a ring and forming an upward-opening second inner cavity inside, a through-hole being provided between the second inner cavity and the lower first inner cavity, a cylinder assembly being installed within the second inner cavity, the cylinder assembly comprising a cylinder body, a cylinder head, and a valve plate, the cylinder head being located at the top of the cylinder body, the valve plate being disposed between the cylinder head and the cylinder body, the cylinder body communicating with the through-hole, a piston chamber formed within the cylinder body, a connecting rod connected to the crank, the upper end of the connecting rod extending into the piston chamber and connected to a piston, a housing cover covering the cylinder assembly being installed above the extension wall, a side cover being installed on the side of the housing away from the motor assembly, characterized in that... A vertically distributed first airflow channel is formed between the cylinder body and the inner wall of the extension wall and connects to the box cover. A first ventilation port is provided between the first inner cavity and the second inner cavity. The first ventilation port is connected to the first airflow channel. When the fan blade rotates, the first airflow driven by it enters the first airflow channel through the first ventilation port and flows into the box cover through the first airflow channel. An air outlet is provided on the box cover. A first heat sink is provided on the outside of the cylinder body for cooling the cylinder body. The first heat sink is vertically arranged and located in the first airflow channel. An air duct is formed between adjacent first heat sinks to allow air to pass upward.

2. The air compressor structure for extending the life of worn parts according to claim 1, characterized in that, The first heat sink is disposed on the outer peripheral surface of the cylinder.

3. The air compressor structure for extending the life of worn parts according to claim 1, characterized in that, The cylinder body is covered with a heat dissipation sleeve, and a first heat dissipation fin is disposed on the outer peripheral surface of the heat dissipation sleeve. The heat dissipation sleeve is used to receive the heat of the cylinder body and dissipate the heat from the first heat dissipation fin.

4. The air compressor structure for extending the life of worn parts according to claim 1, 2, or 3, characterized in that, The first heat sink includes a root and a body. The outer end of the root has a side opening and a top opening for insertion holes. The inner end of the body has a connecting part that mates with the insertion holes. The connecting part can slide downward into the insertion holes from the top opening, and the body extends out from the side opening of the insertion holes. One or more body parts can be inserted into the insertion holes, or a spacer for separating upper and lower body parts can also be inserted into the insertion holes. The outer end of the body has at least one thin sheet for heat dissipation. The thin sheet is vertically arranged and its thickness is less than the thickness of the root and the body.

5. The air compressor structure for extending the life of worn parts according to claim 4, characterized in that, An internal thread can be provided at the top opening of the socket, and a plug is threadedly connected to the top opening of the socket to seal the top opening.

6. The air compressor structure for extending the life of worn parts according to claim 4, characterized in that, An elastic rubber plug can be inserted into the top opening of the socket, and the elastic rubber plug is interference-fitted with the inner wall of the socket.

7. The air compressor structure for extending the life of worn parts according to claim 4, characterized in that, The socket is a C-shaped socket with a closed bottom, the connecting part is a column that matches the shape of the C-shaped socket, and the spacer is also a column that matches the shape of the C-shaped socket.

8. The air compressor structure for extending the service life of wear parts according to claim 1, characterized in that, A ring-shaped or combined ring-shaped support rib is provided between the first inner cavity and the second inner cavity. The support rib surrounds the opening. The top of the support rib is provided with a rim. The rim and the support rib combine to form a circular positioning groove. The lower end of the cylinder body is inserted into the positioning groove and abuts against the support rib. The valve plate and cylinder cover are arranged sequentially above the cylinder body and fixed to the extension wall with screws. The support rib is fixedly connected to the inner wall surface of the extension wall through connecting ribs. The first ventilation opening is formed between two adjacent connecting ribs. The first ventilation opening surrounds the outside of the opening.

9. The air compressor structure for extending the service life of wear parts according to claim 1, characterized in that, The side cover is provided with an air inlet that communicates with the first inner cavity.

10. The air compressor structure for extending the life of worn parts according to claim 8, characterized in that, The four edges of the valve plate extend beyond the cylinder body, and the extended portion blocks at least a portion of the upper opening of the first airflow channel. The valve plate is provided with a second vent opposite to the upper opening of the first airflow channel. The second vent is used to supply air to blow towards the cylinder head. The cylinder head is provided with a second heat sink for cooling the cylinder head.

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