CN111720288A

CN111720288A - Air compressor

Info

Publication number: CN111720288A
Application number: CN201910248122.5A
Authority: CN
Inventors: 詹姆斯·马歇尔·雷诺; 安东·米凯莱·爱德华多·梅西纳
Original assignee: Tjm Products Ltd
Current assignee: Tjm Products Ltd
Priority date: 2019-03-20
Filing date: 2019-03-29
Publication date: 2020-09-29
Anticipated expiration: 2039-03-29
Also published as: AU2019202008A1; AU2022100008A4

Abstract

An air compressor includes a motor, a sleeve, a connecting rod, a piston, a valve plate, an air filter, a cover, a crankcase, an air storage tank, a plug, a cylinder head, an air tank end cover, a motor end cover, a fan cover, and a safety valve. The crankcase has a bore. One end of the hole communicates with the hole of the cylinder head, and the other end of the hole communicates with the recess of the crankcase. The gas storage tank comprises a hollow part, an inner wall, an outer wall, a plurality of connecting walls and a plurality of gas storage openings. The hollow part is used for accommodating the motor shell. The plug is attached to the threaded hole of the outer wall. The gas canister end cover is provided with a plurality of recesses. The gas storage opening communicates with the recess of the crankcase and the recess of the gas tank end cover. A plurality of spaces are provided between the gas tank end cap and the motor end cap. The fan is located between the motor end cover and the fan cover. The motor rotates the fan to provide cooling to the internal components. The compressor is designed with an integrated storage tank. The tank is an aluminum profile with internal ribs to provide conductive and convective heat dissipation when combined with the action of a cooling fan.

Description

Air compressor

Technical Field

The present invention relates to an air compressor.

Background

The present invention relates to an air compressor.

Air compressors are used to provide high pressure air for use in several applications, such as the inflation of automobile tires, motorcycle tires, bicycle tires, and the operation of pneumatic locking differentials. In addition, the small air compressors may be classified into various types, for example, vehicle-mounted type and portable type, according to their installation. In an in-vehicle air compressor, a user may select a location on the vehicle where the air compressor is to be mounted, for example, using screw fasteners to mount the air compressor to a side wall of the truck bed. On the other hand, a portable air compressor would provide a base portion of the air compressor that is capable of standing on a flat surface. This allows the user to move the air compressor for convenient use in different locations. An example of an air compressor has been previously invented. For example, U.S. Pat. No.9,476,416 to Chi-Wen Chen. This us patent No.9,476,416 mentions an air compressor comprising a housing member, a driving member and a cylinder member. The device according to us patent No.9,476,416 lacks an air reservoir, resulting in that it may take a lot of time to fully inflate the work piece.

Disclosure of Invention

The present invention provides a compact air compressor suitable for vehicle-mounted and portable applications.

An air compressor according to the present invention includes:

a motor having a shaft for driving the fan and the crankshaft;

a sleeve mounted to the crankcase;

a connecting rod mounted to the crankshaft, the connecting rod having a piston at one end, the piston mounting a reed valve, the piston being located in the sleeve;

a valve plate mounted with a reed valve;

an air filter attached to the shroud;

the cover attached to the crankcase;

the crankcase including a plurality of recesses, each recess being located adjacent to one end of a connecting wall of the air tank, the crankcase having at least one hole having two ends, one end of the hole communicating with a hole of the cylinder head and the other end communicating with a recess of the crankcase, the crankcase for covering a first end of the motor case and covering a first end of the air tank, the crankcase having a plurality of holes for allowing air to flow therethrough;

the gas storage tank comprises a hollow part, an inner wall, an outer wall, a first end, a second end and a plurality of connecting walls, the hollow part is used for accommodating a motor shell, the connecting walls are separately positioned, the connecting walls are used for connecting the inner wall and the outer wall, the connecting walls extend along the length of the gas storage tank to form a plurality of gas storage openings, each gas storage opening is provided with two ends, one end of each gas storage opening is communicated with the concave part of the crankcase, the other end of each gas storage opening is communicated with the concave part of the gas tank end cover, and the outer wall at least has a threaded hole penetrating through the outer wall;

at least one plug attached to a threaded hole of an outer wall of the air reservoir, the plug being removable to connect a device to the threaded hole to receive compressed air;

the cylinder head attached to the crankcase, the cylinder head having at least one bore in communication with a bore of a relief valve;

the tank end cap attached to the crankcase, the tank end cap having a plurality of recesses, each recess positioned adjacent another end of the connecting wall of the air tank, the tank end cap having a mounting point for securing a motor end cap, the tank end cap for covering a second end of the air tank;

the fan positioned between the motor end cap and the fan housing, the fan for drawing air through the crankcase aperture, through the space between the motor housing and the air reservoir, through the space between the air reservoir end cap and the motor end cap, through the fan housing aperture, and out of the air compressor;

the fan housing having a plurality of apertures that allow air to flow through, wherein the fan housing is attached to the gas tank end cap; and

the relief valve, mounted to the cylinder head, will operate by venting air within the cylinder head to the exterior of the cylinder head when the air pressure within the cylinder head rises above a defined limit.

It is an object of the present invention to provide an air compressor with an integrated air reservoir, whereby it is possible to extend the time between power cycles of the compressor without a large increase in the size of the components.

It is another object of the present invention to provide cooling to the air reservoir so that the air reservoir is low in temperature and safe for the user. In particular, this helps the air container not to burn the user's hand when the user inserts/removes the connector or the air joint into/from the air container.

It is another object of the present invention to provide cooling for components of the air compressor, such as the motor housing and crankcase, so that the components of the air compressor are cooler. This extends the life of the components, including the seals, and increases the operating duty cycle defined by the percentage run time (relative to the cooling time) in a given interval.

Another object of the present invention is to provide a gas container that can be made of aluminum extrusion.

Other objects will become apparent from the following description and the accompanying drawings.

Drawings

FIG. 1 is a rear perspective view showing an air compressor according to the present invention;

FIG. 2 is a rear view of a fan cover according to the present invention;

FIG. 3 is a rear perspective view showing a motor end cap according to the present invention;

FIG. 4 is a rear perspective view showing a cylinder head, crankcase, seal and air reservoir in accordance with the present invention;

FIG. 5 is a rear view of the crankcase;

fig. 6 is a rear perspective view showing a gas cylinder end cap according to the present invention;

fig. 7 is a front perspective view showing a gas cylinder end cap according to the present invention;

fig. 8 is a partial sectional view and a perspective view illustrating an air compressor according to the present invention;

FIG. 9 is an enlarged view of the circular dotted line taken from FIG. 8 showing the relief valve;

FIG. 10 is a top view showing an air compressor according to the present invention;

FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10, illustrating an air compressor according to the present invention;

fig. 12 is a sectional view and a rear perspective view showing an air compressor according to the present invention;

FIG. 13 is a rear view showing an air compressor according to the present invention;

FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. 13, illustrating an air compressor according to the present invention;

FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. 13, illustrating an air compressor according to the present invention; and

FIG. 16 is a cross-sectional view taken along line 16-16 of FIG. 13, illustrating an air compressor according to the present invention.

Detailed Description

The invention will be described hereinafter with reference to the accompanying drawings. Each figure includes a number indicating the individual component. Like reference numerals shown in the drawings denote like parts.

The invention provides a small-sized air compressor suitable for vehicle-mounted and portable applications.

Fig. 1 shows an air compressor 30 according to the present invention. Fig. 1 also shows components such as a crankcase 31, a cylinder head 32, an air tank 33, a tank cover 35, a fan cover 36, a base 39, and a cable 60. When a user desires to use the device, the user needs to remove at least one plug, such as plug 57 or plug 58, of the air reservoir 33. Subsequently, the user needs to connect the connector or air fitting of the air tube to the threaded

hole

61 or 62 at the air container to replace the plug. Thereafter, the user needs to connect the cable 60 to the power source using a supplied wire loom (not shown). Upon activation of an electrical connector power switch (not shown), the motor begins to operate, causing the part attached to the shaft 40 to rotate. The parts attached to the shaft 40 are the fan 37 and the crankshaft 42.

Fig. 2 shows the fan housing 36 including a plurality of holes 92 for inserting the screws 67, a plurality of holes 93 for allowing air to flow through, and a plurality of holes 94 for inserting the screws 68.

Fig. 3 shows the motor end cap 38 including a central hole 114 for insertion of the shaft 40 and two holes 115 for insertion of screws 113.

Fig. 4 shows the crankcase 31, cylinder head 32, seal 120 and air reservoir 33 before they are assembled together.

The crankcase 31 includes a top hole 71, and the top hole 71 communicates with a hole 97 extending from the front to the rear. The aperture 97 allows air to enter the cylinder via the air filter cover 50 and receives the crankshaft 42 and piston rod 43. At the rear of the crankcase 31, there are a plurality of recesses 72 and a plurality of screw holes 73 for inserting screws 66 so that the gas tank end cover 35 is attached to the crankcase 31. At the top of the crankcase 31, there are

holes

74 and 75 for allowing air to flow through, and there are a plurality of threaded holes 76 for inserting screws 70 to attach the cylinder head 32 to the crankcase 31. After the components are assembled together, the location of each recess 72 will be adjacent the connecting wall 87 of the air reservoir. The hole 74 is used for communication between the hole 79 and the recess 72 (fig. 14). The hole 75 is used for communication between the hole 78 and the recess 72 (fig. 16). The crankcase 31 also includes a rim 106 to cover a first end 108 of the air reservoir 33 and a seal 120.

The cylinder head 32 includes a plurality of holes 81 for inserting the screws 70. Above the valve plate 45 there is a high pressure chamber 77 (fig. 8). There is a threaded hole 63 (fig. 4) for mounting the plug 52. With a threaded hole 65 for mounting the plug 56. With the bore 80 communicating with the bore 110 (fig. 9). The hole 110 is adjacent to the threaded hole 63. The bore 110 is adapted to receive the valve 54 and the spring 53. The cylinder head has a bore 78 for communicating with the threaded bore 64 of the cylinder head.

The air reservoir 33 has a length "L" and includes a hollow portion 82, an inner wall 98, an outer wall 99, a first end 108, a second end 109, and a plurality of connecting walls 87. The hollow portion 82 is for accommodating the motor housing 34. The air reservoir 33 also includes a plurality of fins 111. The fins 111 extend from the inner wall 98 in a direction toward the central axis of the air reservoir. The fins are arranged along the entire length of the air reservoir. The fins 111 provide rigidity and conduct heat to the air flow for convective heat transfer to the flowing air. The respective connecting walls 87 are positioned separately. The connecting wall 87 serves to connect the inner wall 98 and the outer wall 99. The connecting wall 87 is disposed along the entire length of the air container, thereby forming a plurality of air storage openings. The gas storage opening has two ends. One end of the air storage opening communicates with the recess 72 of the crankcase. The other end of the gas storage opening communicates with the recess 95 of the gas tank end cap 35. The outer wall 99 has at least a threaded hole therethrough. Fig. 4 shows four connection walls 87, thereby forming four air storage openings, i.e., a first air storage opening 83, a second air storage opening 84, a third air storage opening 85, and a fourth air storage opening 86. FIG. 4 shows a plurality of threaded holes, namely threaded hole 61 and threaded hole 62, through outer wall 99 for mounting two different sizes of air fittings to connect pipes or devices.

The air tank 33 may be made of various materials. The air reservoir 33 provided by the present invention is made of an aluminum profile with internal ribs to provide conductive and convective heat dissipation when combined with the action of the cooling fan.

Fig. 5 shows the crankcase 31 including a plurality of apertures 96. The holes 96 are used to allow air to flow through. Fig. 5 shows four recesses 72 on the top, bottom, left and right sides. The recess 72 serves as a passage through which air flows from one air storage opening to the next air storage opening.

Figure 6 shows a rear perspective view of the gas cylinder end cap 35, the gas cylinder end cap 35 including holes 89 for inserting screws 66 and threaded

holes

90 and 102 for dual purpose screws. The screws fix the fan cover 36 to the gas tank end cover 35, and also connect the fan cover 36 to the base 39. Multiple mounting orientations of the base are possible. Fig. 6 shows threaded holes 91 for tightening screws 113 to secure the motor end cap 38 to the gas cylinder end cap 35, and threaded holes 102 for tightening screws 68 to secure the first end of the base 39 to the gas cylinder end cap 35.

Fig. 7 is a front perspective view of the gas cylinder end cap 35 including a plurality of recesses 95. The present invention provides four recesses 95. After the tank end cap 35 is assembled with the air tank 33, each recess 95 will be adjacent to the connecting wall 87 of the air tank 33 with the connecting wall 87 aligned in the middle of the recess 95, so that the recess 95 opens into two air storage openings separated by the connecting wall. The tank end cap 35 also includes a rim 107 for covering the second end 109 of the gas tank 33 and the seal 121 (fig. 16).

FIG. 8 illustrates the assembled components of the air compressor 30, the air compressor 30 including:

a motor having a shaft 40 for driving the fan 37 and the crankshaft 42;

a sleeve 44 mounted to the crankcase 31;

a connecting rod 43 mounted to the crankshaft 42, the connecting rod 43 being cast in one piece with a piston 112, the piston being fitted with a reed valve 46, the piston being located in a sleeve 44;

a valve plate 45 fitted with at least one reed valve 117;

an air filter attached to the hood 48;

a cover 48 attached to the crankcase 31 by screws 69 (fig. 10);

a crankcase 31 including a plurality of recesses 72, each recess 72 being located adjacent an end of a connecting wall 87 of the air reservoir 33, the crankcase having at least one bore having two ends, one end of the bore communicating with a bore of the cylinder head and the other end of the bore communicating with a recess 72 of the crankcase, the invention providing a bore 74 communicating with a bore 79 of the cylinder head and providing a bore 75 communicating with a bore 78 of the cylinder head, the

bores

74 and 75 communicating with the top recess 72, the crankcase 31 being adapted to cover the first end 41 of the motor housing 34 and to cover the first end 108 of the air reservoir 33, the crankcase 31 having a plurality of apertures 96 for allowing air flow;

a gas tank 33 including a hollow portion 82, an inner wall 98, an outer wall 99, a first end 108, a second end 109, and a plurality of connecting walls 87, the hollow portion 82 being configured to receive the motor housing 34, the connecting walls 87 being positioned separately, the connecting walls 87 being configured to connect the inner wall 98 and the outer wall 99, the connecting walls 87 extending along the entire length of the gas tank to form a plurality of gas storage openings, the gas storage openings having two ends, one end of the gas storage openings being in communication with the recess 72 of the crankcase, the other end of the gas storage openings being in communication with the recess 95 of the tank end cap 35, the outer wall 99 having at least one threaded hole therethrough;

at least one plug attached to a threaded through hole of an outer wall 99 of the air reservoir, the plug being removable to connect a device to the threaded hole to receive compressed air;

a cylinder head 32 attached to the crankcase, the cylinder head having at least one bore in communication with the bore of the relief valve;

a tank end cover 35 attached to the crankcase; the tank end cap having a plurality of recesses 95, each recess 95 being located adjacent an end of the connecting wall 87 of the air tank 33, the tank end cap having a central aperture 88 for receiving the motor end cap 38, the tank end cap for covering the second end 109 of the air tank 33;

a motor end cap 38 attached to the gas cylinder end cap, the motor end cap covering the second end 47 of the motor housing 34 when mounted together with the gas cylinder end cap such that a plurality of spaces 105 are formed therebetween;

a fan 37 located between the motor end cap 38 and the fan housing 36, the fan 37 for drawing air through the crankcase aperture 96, through the space 104 between the motor housing and the air reservoir, through the space 105 between the air reservoir end cap and the motor end cap, through the fan housing aperture 93, and out of the air compressor;

a fan housing 36 having a plurality of holes 93 allowing air to flow therethrough, wherein the fan housing is attached to the tank end cap;

a screw 119 for fixing the front end of the base 39 to the crankcase 31; and

a relief valve mounted to the cylinder head 32, which will operate by venting air in the cylinder head to the outside of the cylinder head when the air pressure in the cylinder head rises above a defined limit.

When the user connects the cable 60 to the power source, the motor rotates, causing the components attached to the shaft 40 to rotate. The components attached to the shaft 40 are a fan 37 and a crankshaft 42. After the fan 37 is rotated, outside air is drawn through the holes 96 into the air compressor in the direction of arrow 300. Thereafter, the air will flow through the space 104 between the motor casing and the air tank, thereby forming heat convection to cool the motor casing 34 and the air tank 33. The air continues to flow through the space 105 between the motor end cap and the air tank end cap, through the aperture 93 and out of the air compressor 30 in the direction of arrow 400. As crankshaft 42 rotates, connecting rod 43 and piston 112 will move. During the intake stroke, the piston will move away from the valve plate 45, thereby establishing a low pressure in the space 100. The reed valve 46 will open and ambient air outside the air compressor 30 will flow in the direction of arrow 200 through the aperture of the air filter shroud 50, through the air filter material 51, through the aperture 103 of the base of the air filter 49 and into the aperture 97 and then into the space 100 through the open valve 46. Thereafter, a compression stroke for compressing the air in the space 100 will be started. The piston will move towards the valve plate 45 and the reed valve 46 will close. When the pressure in the space 100 is above the pressure in the high pressure chamber 77, the reed valve 117 will open allowing air to flow from the space 100 through the holes of the valve plate 45 into the high pressure chamber 77 above the valve plate. High pressure air in the high pressure chamber 77 will flow into the air reservoir via the

apertures

78 and 79.

Fig. 8 also shows the gas canister end cap 35 attached to the crankcase 31 by screws 66. The screw 66 is inserted through the hole 89 of the gas tank end cap, through the gas storage opening and fastened to the threaded hole 73 of the crankcase 31. Further, fig. 8 shows a valve plate 45 mounted in a position between the cylinder head 32 and the sleeve 44.

Fig. 9 shows the components of the safety valve. The cylinder head 32 includes a bore 80 in communication with a bore 110. The hole 110 communicates with the threaded hole 63. In the case where the air compressor 30 is operated without a pressure cut-off switch, the air will be compressed until the air pressure in the air reservoir rises above a defined limit. The relief valve will operate to vent air to the exterior of the cylinder head 32.

The safety valve includes:

a plug 52 having a hole 101, the plug 52 being fastened to a threaded hole 63 of the cylinder head;

a spring 53, one end of which pushes a shoulder of the valve 54 and the other end of which pushes the plug 52; and

a valve 54, which is a cylindrical stem with a shoulder;

in the valve closed position, the valve 54 will close the bore 80, preventing air from flowing from the high pressure chamber 77 in the cylinder head into the bore 110;

in the valve open position, high pressure air from the high pressure chamber 77 in the cylinder head will flow into the bore 80 and push against the valve 54 and move the valve 54 towards the plug 52 so that the spring 53 is compressed and air from the space in the cylinder head can flow through the bore 80, through the bore 110, through the plug bore 101 and out of the cylinder head.

Fig. 10 shows an air compressor 30 that includes a plurality of plugs 57 so that several air tubes or devices can be mounted to the air compressor 30 whereby compressed air can be supplied to several applications simultaneously.

Fig. 11 shows the components of the air compressor 30, in particular the position of all four recesses 72 aligned with the respective connecting wall 87.

Fig. 11 also shows the top concave portion 72 overlapping the vertical connecting wall 87 at a middle position of the concave portion 72, thereby forming a left concave portion 72L communicating with the first air storage opening 83 and forming a right concave portion 72R communicating with the second air storage opening 84.

Fig. 11 also shows the left concave portion 72 overlapping the horizontal connecting wall 87 at a middle position of the concave portion 72, thereby forming a top concave portion 72T communicating with the first air storage opening 83 and forming a bottom concave portion 72B communicating with the third air storage opening 85.

Fig. 11 also shows the right recess 72 overlapping the horizontal connecting wall 87 at a middle position of the recess 72, thereby forming a top recess 72T communicating with the second air storage opening 84 and forming a bottom recess 72B communicating with the fourth air storage opening 86.

Fig. 11 also shows the bottom recess 72 overlapping the vertical connecting wall 87 at a middle position of the recess 72, thereby forming a left recess 72L communicating with the third air storage opening 85 and forming a right recess 72R communicating with the fourth air storage opening 86.

The above-mentioned alignment of the recess and the connecting wall allows the air in all four air storage openings to communicate with each other.

Fig. 11 also shows a plug 67 attached to the threaded hole 62 and shows that each screw 66 passes through a respective gas storage opening. Further, bore 79 is shown in communication with bore 74 and bore 78 is in communication with bore 75. The

holes

74 and 75 communicate with the top concave portion 72. Fig. 11 also shows a plug 59 mounted in the bottom region of the air reservoir. The threaded holes 61 and 62 in the bottom of the air reservoir mirror the holes in the top so that there are 4 to 8 ports available for the connection device depending on the mounting configuration.

Fig. 12 illustrates the components of the air compressor 30, showing the first air storage opening 83, the second air storage opening 84, the third air storage opening 85, and the fourth air storage opening 86 positioned around the motor housing 34. There is a space 104 between the inner wall 98 of the air reservoir and the motor housing. The outside cold air flows through the space 104, whereby heat can be effectively removed from the air storage tank 33 and the motor casing 34.

Fig. 12 also shows the positions of the components of the air compressor 30, showing three plugs, i.e., the plug 56, the plug 52, and the plug 55, mounted to the cylinder head 32, showing four screws 66, each of which passes through a first air storage opening 83, a second air storage opening 84, a third air storage opening 85, and a fourth air storage opening 86, respectively.

Fig. 13 shows the position of the cylinder head bore 79 communicating with the crankcase bore 74, the crankcase bore 74 communicating to the recess 72, the recess 72 communicating to the crankcase bore 75, and the crankcase bore 75 communicating to the cylinder head bore 78.

Fig. 14 and 16 are sectional views showing components of the air compressor 30 when high-pressure air is accumulated in the air tank 33. The working principle is as follows: after the user connects the air compressor 30 to the power source, the motor will operate to rotate the crankshaft 42. As the piston 112 moves toward the valve plate 45, air in the space 100 is compressed while air is drawn through the air filter into the crankcase bore 97.

The compression of the air in the space 100 is accomplished by the piston 112 moving toward the valve plate 45 while the reed valve 46 is closed. When the pressure in the space 100 is greater than the high pressure chamber 77, the reed valve 117 opens so that the compressed air in the space 100 flows into the high pressure chamber 77 through the hole of the valve plate 45.

Ambient air is drawn into the crankcase bore 97 by the piston moving away from the valve plate 45, causing the reed valve 46 to open as a result of the low pressure created in the space 100 by this movement. Thus, the external airflow passes through the aperture of the air filter cover 50, through the filter material, through the aperture 103 of the filter base 49, into the aperture 97 of the crankcase, and through the reed valve 46 into the space 100.

As the motor continues to operate, high pressure air from the high pressure chamber 77 will flow into the four air storage openings:

high-pressure air from the high-pressure chamber 77 flows through the hole 79, through the hole 74, through the left recess 72L into the first air reservoir opening 83 in the direction indicated by the arrow 500 in fig. 14;

high-pressure air from the high-pressure chamber 77 flows through the hole 78, through the hole 75, through the right recess 72R into the second air reservoir opening 84 in the direction indicated by the arrow 500 in fig. 16;

high-pressure air from the first air storage opening 83 flows into the bottom recess 72B through the top recess 72T and into the third air storage opening 85;

high-pressure air from the second air storage opening 84 flows into the bottom recess 72B through the top recess 72T and into the fourth air storage opening 86;

the high pressure air from each air storage opening flows from the first end 108 to the second end 109 until it hits the tank end cap 35. As is apparent from the above description, each recess 95 of the tank end cover is positioned adjacent to the other end of the connecting wall 87, thereby forming a left recess 95L, a right recess 95R, a top recess 95T, and a bottom recess 95B. Thus, all four gas storage openings, all four recesses 72 of the crankcase and all four recesses 95 of the gas tank end cover can communicate with each other. Thus, high pressure air may flow through all four air storage openings, through all four recesses 72 of the crankcase, and through all four recesses 95 of the gas canister end. Using this arrangement means that the device can be fitted to any

port

61 or 62 and the pressure within the tank will be equal.

Fig. 15 is a sectional view showing the screws 68 passing through the holes 116 of the base 39, through the holes 94 of the fan cover 36, and fastened to the threaded holes 102 of the gas tank end cover 35, whereby the rear portion of the base 39 is attached to the gas tank end cover 35.

Since the air compressor according to the present invention provides an air reservoir, the number of power cycles for operating a device such as a pneumatic locking differential is reduced.

Since the air compressor according to the present invention provides cooling to the air tank, the air tank temperature is low and safe for the user. In particular, it is helpful for the air container not to scald the user's hand when the user inserts/removes a connector or an air joint into/from the air container.

Since the air compressor according to the invention provides cooling for the components of the air compressor, the component temperatures are low. Therefore, the life of the components including the seal is long, and the duty cycle of operation is increased.

Further, the air compressor according to the present invention provides an air container that may be made of an aluminum profile.

Claims

1. An air compressor comprising:

a motor having a shaft for driving the fan and the crankshaft;

a sleeve mounted to the crankcase;

a valve plate mounted with a reed valve;

an air filter attached to the shroud;

the cover attached to the crankcase;

the method is characterized in that:

the crankcase (31) including a plurality of recesses (72), each recess (72) being located adjacent one end of a connecting wall (87) of an air reservoir (33), the crankcase having at least one bore having two ends, one end of the bore communicating with a bore of a cylinder head (32) and the other end communicating with a recess (72) of the crankcase, the crankcase (31) being adapted to cover a first end (41) of a motor housing (34) and to cover a first end (108) of the air reservoir (33), the crankcase (31) having a plurality of apertures (96) allowing air to flow therethrough;

and further comprising:

the gas storage tank (33) comprises a hollow portion (82), an inner wall (98), an outer wall (99), a first end (108), a second end (109) and a plurality of connecting walls (87), the hollow portion (82) is used for accommodating a motor housing (34), each connecting wall (87) is separately positioned, the connecting walls (87) are used for connecting the inner wall (98) and the outer wall (99), the connecting walls (87) extend along the whole length of the gas storage tank to form a plurality of gas storage openings, each gas storage opening is provided with two ends, one end of each gas storage opening is communicated with the concave portion (72) of the crankcase, the other end of each gas storage opening is communicated with the concave portion (95) of the gas tank end cover (35), and the outer wall (99) at least has a threaded hole penetrating through the outer wall;

at least one plug attached to a threaded hole of an outer wall (99) of the air reservoir, the plug being removable to connect a device to the threaded hole to receive compressed air;

the cylinder head (32) attached to the crankcase, the cylinder head having at least one bore in communication with a bore of a relief valve;

the tank end cap (35) attached to the crankcase, the tank end cap having a plurality of recesses (95), each recess (95) located adjacent the other end of the connecting wall (87) of the air tank (33), the tank end cap having a central aperture (88) for receiving a motor end cap (38), the tank end cap for covering the second end (109) of the air tank (33);

the motor end cap (38) attached to the gas cylinder end cap, there being a plurality of spaces (105) between the gas cylinder end cap and the motor end cap when the motor end cap is installed in the gas cylinder end cap, the motor end cap covering a second end (47) of the motor housing (34);

the fan (37) located between the motor end cap (38) and the fan housing (36), the fan (37) for drawing air through the crankcase aperture (96), through a space (104) between the motor housing and the air reservoir, through a space (105) between the air reservoir end cap and the motor end cap, through the fan housing aperture (93) and out of the air compressor;

the fan housing (36) having a plurality of holes (93) that allow air to flow through, wherein the fan housing is attached to the gas tank end cap; and

the relief valve, install to the cylinder head (32), when the air pressure in the cylinder head rises above the limit of the limit, the relief valve will be operated by discharging the air in the cylinder head to the cylinder head outside.

2. The air compressor as claimed in claim 1, wherein the air tank includes four connecting walls (87) and four air storage openings, the four air storage openings being a first air storage opening (83), a second air storage opening (84), a third air storage opening (85), and a fourth air storage opening (86).

3. The air compressor according to claim 1, wherein the air storage tank (33) is made of an aluminum profile.

4. The air compressor according to claim 1, wherein the cylinder head (32) has a bore (78) communicating with a bore (75) of the crankcase (31), the cylinder head bore (78) also communicating with the cylinder head threaded bore (64),

the air compressor further includes a plug (55) attached to a threaded hole (64) of the cylinder head (52).

5. The air compressor of claim 1, wherein the cylinder head (32) includes a bore (80) in communication with a bore (110), the bore (110) in communication with a threaded bore (63),

the safety valve includes:

a plug (52) including a bore (101), the plug (52) attached to a threaded bore (63) of the cylinder head;

a spring (53), wherein one end of the spring pushes a shoulder of a valve (54) and the other end of the spring pushes the plug (52); and

the valve (54), the valve (54) being a cylindrical stem having a shoulder,

in a valve closed position, the valve (54) will close the bore (80), preventing air flow from a high pressure chamber (77) in the cylinder head into the bore (110),

in a valve open position, air from the high pressure chamber within the cylinder head will urge the valve (54) to move towards the plug (52) so that the spring (53) is compressed and air from the high pressure chamber within the cylinder head can flow through the bore (80), through the bore (110) and through the plug bore (101) and out of the cylinder head.

6. The air compressor of claim 1, wherein the air reservoir further comprises a plurality of fins (111), each fin positioned separately, each fin projecting from the inner wall (98) in a direction toward a central axis of the air reservoir, and the fins extending along an entire length of the air reservoir.

7. The air compressor of claim 1, wherein the cylinder end cap has a plurality of holes, the cylinder end cap (35) is attached to the crankcase (31) by a plurality of screws (66), each screw (66) is inserted through a hole (89) of the cylinder end cap, through the air storage opening, and is tightened into a threaded hole (73) of the crankcase (31).

8. The air compressor according to claim 1, wherein the valve plate (45) is located between the cylinder head (32) and the sleeve (44).

9. The air compressor according to claim 1, wherein the crankcase (31) further comprises an edge (106) for covering a first end (108) of the air reservoir.

10. The air compressor according to claim 1, wherein the gas tank end cap (35) further comprises an edge (107) for covering a second end (109) of the gas tank.