An integrated air filter and cooler oil-free air compressor

Abstract

The utility model relates to an oil -free air compressor of integrated air filter and cooler especially relates to air compressor technical field. The utility model discloses motor shell, air filter, crankcase, motor shaft, heat dissipation fan, eccentric wheel, exhaust pipe, air inlet pipe, cooler, cylinder assembly place the cooler below the motor shell, install and fix on the bottom plate below the motor shell simultaneously, and the bottom plate communicates the shock pad to realize the cooler integration on the motor shell, and its advantage is that the cooler air inlet and exhaust pipe connection are convenient, and the pipeline is shortened, and the overall aesthetic property is high, installs and fixes the air filter on the motor shell to realize the air filter integration on the motor shell, shortens the pipeline connection of air filter to the air inlet channel, improves the heat radiation structure of oil -free air compressor, realizes synchronous operation of heat dissipation fan and motor shaft, cancels the external 24V power line to reduce the customer line layout, reduce cost and noise.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to an oil-free air compressor that integrates an air filter and a cooler. Background Technology

[0002] As a core power equipment in the industrial field, air compressors are being designed to be more compact, efficient, integrated, and easy to maintain. However, current mainstream air compressor products still face many technical bottlenecks in terms of structural layout, integration, and heat dissipation design, which restrict their miniaturization and convenience.

[0003] First, the overall structure is bulky, resulting in significant layout limitations. The internal structure of mainstream scroll and screw air compressors on the market dictates that their overall length, width, and height are generally large, and they are also heavy. This structural defect severely limits their layout for applications requiring miniaturization and portability, making it inconvenient to move the equipment, occupying a lot of space, and failing to meet the integration requirements of modern compact equipment.

[0004] Secondly, key components are not integrated, making installation and maintenance cumbersome. Existing technologies suffer from two major problems: External Cooler: Most air compressors do not integrate their coolers with the main unit; instead, they are externally connected. This design not only increases the overall size of the machine but also forces customers to disassemble the pipe joints on the cooler first when maintenance or replacement of the main unit is required. This operation is complex, time-consuming, and labor-intensive, significantly increasing after-sales maintenance costs and time.

[0005] External air filter: Air filters are also commonly externally connected, with the independent air filter component connected to the main unit via a long tubing. This layout not only occupies a lot of extra space, but also results in complex and messy tubing, causing great inconvenience to customers' on-site installation and layout, and failing to meet the user's need for simplicity and integration.

[0006] Secondly, the cooling system design is inefficient and not independent. Existing air compressor cooling solutions have significant shortcomings: Poor heat dissipation efficiency: Most products use external fans to cool individual components. This approach results in a single cooling target and chaotic airflow, failing to provide systematic and efficient cooling for the entire machine, leading to low heat dissipation efficiency. Furthermore, the independent fan and airflow structure further increases the overall size of the machine, making it less compact.

[0007] External power supply required: Some cooling fans require customers to provide an additional 24V independent power supply to drive them. This not only increases the complexity of the customer's wiring layout, but also affects the integrated power supply experience of the equipment. Utility Model Content

[0008] (1) Technical solution To solve the above-mentioned technical problems, this utility model provides an oil-free air compressor integrating an air filter and a cooler, including a motor housing, an air filter, a crankcase, a motor shaft, a cooling fan, an eccentric wheel, an exhaust pipe, an intake pipe, a cooler, and a cylinder assembly. The air filter is installed on the top of the motor housing, and the crankcases are installed on both ends of the motor housing. The motor housing has an intake channel communicating with the two crankcases. The air filter has an air filter inlet, which is connected to the intake channel through the intake pipe. Two cooling fans are provided. The motor shaft is installed inside the motor housing and is respectively installed on the outside of the two crankcases. The eccentric wheel is installed on both ends of the motor shaft. A pair of cylinder assemblies are installed on each crankcase. Each cylinder assembly has an exhaust port that communicates with the intake channel. The cooler is located below the motor housing. The cooler has a cooling channel. Each exhaust port is connected to the exhaust pipe. One end of the exhaust pipe is connected to the intake port on one side of the cooler. The exhaust port is located on the other side of the cooler.

[0009] Preferably, the motor housing is manufactured using a stretching process and is integrally formed with the air intake channel.

[0010] Preferably, the top of the motor housing has an air filter mounting hole for installing the air filter.

[0011] Preferably, the cooling fan is connected to the eccentric wheel via a coupling, and the cooling fan has an air guide shroud on its outer side with an opening at the bottom.

[0012] Preferably, a base plate is installed on both sides of the cooler, and the base plate has a cooler mounting hole for installation in conjunction with the cooler.

[0013] Preferably, the crankcase is provided with feet on both sides, and shock-absorbing pads are installed between the feet and the base plate.

[0014] Preferably, the bottom of the base plate is provided with a support block.

[0015] Preferably, the cylinder assembly includes a top cylinder head disposed on the crankcase, a valve plate assembly installed in the crankcase and cooperating with each other, a cylinder, and a piston connecting rod assembly, wherein the eccentric wheel drives the piston connecting rod assembly to move.

[0016] Preferably, the exhaust port is located on the top cylinder head.

[0017] (2) Beneficial effects This utility model provides an oil-free air compressor integrating an air filter and cooler. Addressing the problem of large and heavy air compressors, it designs a compact oil-free air compressor. This air compressor is an oil-free reciprocating air compressor, meaning all components adopt a structure without lubrication oil. This reduces the impurity content in the compressed gas during compression, ensuring gas purity. Compared with existing technologies, this utility model has the following advantages: 1. Eliminating the motor end cover allows for direct connection to the crankcase, reducing secondary assembly errors, increasing strength, and minimizing potential malfunctions; furthermore, reducing the motor length minimizes the machine casing length, thereby reducing machine width and lowering costs.

[0018] 2. The intake pipe is integrated into the motor housing, eliminating the need for an external intake pipe, reducing the complexity of the whole machine, and minimizing the space of necessary parts, thus achieving the most compact air compressor.

[0019] 3. Place the cooler under the motor housing and install it on the base plate under the motor housing. The base plate is connected to the shock-absorbing pad, thus integrating the cooler into the motor housing. Its advantages are that it makes it easy to connect the air inlet and exhaust pipe of the cooler, shortens the pipeline, and improves the overall aesthetics.

[0020] 4. The air filter is installed and fixed on the motor housing, thus integrating the air filter into the motor housing and shortening the pipeline connection from the air filter to the intake channel.

[0021] 5. An air intake path is formed on the motor housing, eliminating the need for an external air intake hose, reducing the machine's footprint and lowering costs. At the same time, the incoming air can help cool the motor.

[0022] 6. Improve the heat dissipation structure of the oil-free air compressor by synchronizing the cooling fan with the motor shaft, eliminating the need for an external 24V power cord, thus simplifying the customer's wiring layout and reducing costs and noise; the fan is surrounded by an air guide shroud to guide the airflow, thereby improving heat dissipation for components and increasing heat dissipation efficiency; the bottom of the air guide shroud is connected to the cooler, allowing ventilation and heat dissipation for the cooler's cooling channels, thus making the cooling fan multi-purpose, capable of dissipating heat not only for the motor and cylinder but also for the cooler, without the need for an external power cord. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention.

[0024] Figure 2 This is a schematic diagram of the assembly structure of the motor housing and crankcase of this utility model.

[0025] Figure 3 This is a bottom view of the present invention.

[0026] Figure 4This is a schematic diagram of gas flow during the use of this utility model.

[0027] Figure 5 This is a partial sectional view of the present invention.

[0028] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0029] Figure 7 for Figure 2 Enlarged view of point B in the middle.

[0030] Figure 8 for Figure 3 A magnified view of point C in the middle.

[0031] The attached diagram is labeled as follows: 1-Motor housing, 2-Air filter, 21-Air filter inlet, 3-Air filter mounting hole, 4-Crankcase, 5-Motor shaft, 6-Cooling fan, 7-Air guide shroud, 8-Eccentric wheel, 9-Coupling, 10-Exhaust pipe, 11-Intake pipe, 12-Intake passage, 13-Cooler, 131-Intake port, 132-Outlet port, 133-Cooling passage, 14-Shock damping pad, 15-Base plate, 151-Cooler mounting hole, 152-Support block, 16-Cylinder assembly, 161-Top cylinder head, 162-Valve plate assembly, 163-Cylinder, 164-Piston connecting rod assembly. Detailed Implementation

[0032] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0033] like Figures 1-8 As shown in the figure, the oil-free air compressor integrating an air filter and cooler described in this embodiment includes a motor housing 1, an air filter 2, a crankcase 4, a motor shaft 5, a cooling fan 6, an eccentric wheel 8, an exhaust pipe 10, an intake pipe 11, a cooler 13, and a cylinder assembly 16. The air filter 2 is installed on the top of the motor housing 1, and the crankcase 4 is installed on both ends of the motor housing 1. The motor housing 1 and the crankcase 4 are directly connected and fixed with screws. The motor end cover is eliminated, thereby shortening the length and reducing secondary assembly. The length of the motor housing 1 is determined by the motor winding coil and designed to be as short as possible to reduce space waste and shorten the length (e.g., Figure 2(As shown); the crankcase 4 and motor housing 1 are fitted with a stop-fit ​​structure, transition fit, and white glue seal. The motor housing 1 has an outer stop, and the crankcase 4 has an inner stop, which facilitates manufacturing and reduces scrap and rework rates. A ring of white glue is applied to the outer stop of the motor housing 1 to fill the gap. The motor housing 1 is provided with an air intake channel 12 that communicates with the two crankcases 4. The air filter 2 is provided with an air filter inlet 21, which is connected to the air intake channel 12 through the air intake pipe 11. There are two cooling fans 6, which are respectively installed on the outside of the two crankcases 4. The motor shaft 5 is installed inside the motor housing 1. The eccentric wheel 8 is installed on both ends of the motor shaft 5. Each crankcase 4 has A pair of cylinder assemblies 16 are installed, and each cylinder assembly 16 has an exhaust port connected to the air intake channel 12. A cooler 13 is provided below the motor housing 1. The cooler 13 is placed below the motor housing 1, and its external dimensions are designed according to the length of the motor housing 1 and the width of the shock-absorbing pad 14. Its function is to fill the blank space of the motor housing 1, make full use of the space layout, and thus produce a small, compact and beautiful machine. The cooler 13 has a cooling channel 133 inside, and each exhaust port is connected to the exhaust pipe 10. One end of the exhaust pipe 10 is connected to the air intake port 131 on one side of the cooler 13, and the other side of the cooler 13 has an air outlet 132.

[0034] like Figure 2 As shown, the motor housing 1 is made by stretching and is integrally formed with the air intake channel 12. Compared with the die casting process, it can reduce porosity and scrap rate, reduce cost, and improve aesthetics. The air intake channel 12 is integrated into the motor housing 1, which can effectively reduce the number of external hoses, reduce cost and reduce space volume, and can also dissipate heat from the motor housing 1, removing a certain amount of heat from the motor housing 1. like Figure 7 As shown, the intake channel 12 is a special-shaped pipe, which can reduce the width of the motor and improve the overall aesthetics. It also makes full use of the wall thickness of the motor housing 1, so as to make the required wall thickness material for the pipe at the lowest cost and reduce unnecessary material waste. The top of the motor housing 1 is provided with an air filter mounting hole 3 for installing the air filter 2. The air filter 2 is installed and fixed on the motor housing 1, thereby integrating the air filter 2 on the motor housing 1. This shortens the pipeline connection from the air filter 2 to the air intake channel 12. The whole machine looks beautiful and compact. Furthermore, fixing the air filter on the motor housing 1 reduces the need for customers to consider the installation of the air filter 2. To achieve synchronous operation between the cooling fan 6 and the motor shaft 5, the cooling fan 6 is connected to the eccentric wheel 8 via a coupling 9. The eccentric wheel 8 is then mounted on the motor shaft 5, thus achieving synchronous operation between the motor and the fan. This reduces the need for external fan power cables, thereby simplifying the customer's wiring layout. The cooling fan 6 has an air guide shroud 7 on its outer side, which effectively guides the airflow. An opening at the bottom of the air guide shroud 7 allows gas to flow towards the cooling channel 133 of the cooler 13, thereby dissipating heat from the compressed gas within the cooling channel 133. This fully utilizes the cooling effect of the cooling fan 6. The cooler 13 is equipped with a base plate 15 on both sides. The base plate 15 has cooler mounting holes 151 for mounting the cooler 13. The cooler mounting holes 151 are opened on the left and right sides of the base plate 15 for mounting and fixing the cooler 13. The cooler mounting holes 151 of the base plate 15 and the cooler 13 are symmetrical. The air outlet 132 of the cooler 13 can be replaced on all four sides, thereby improving the adaptability of the machine to different scenarios. Both sides of the crankcase 4 are provided with feet, and shock-absorbing pads 14 are installed between the feet and the base plate 15. By eliminating the feet on the motor and setting feet on the crankcase 4, the mounting points of the shock-absorbing pads 14 are widened, making the machine more stable; thereby reducing materials and vibration; and eliminating the upper base plate, reducing costs.

[0035] like Figure 8 As shown, the bottom of the base plate 15 is provided with a support block 152. A small support block 152 protrudes from the base plate 15 to assist in fixing the cooler 13, so that the cooler 13 is a certain height above the lower end surface of the machine base plate 15, so that the cooler 13 does not come into contact with the bottom surface and cause scratches, and also allows the gas to flow up and down. The cylinder assembly 16 includes a top cylinder head 161 disposed on the crankcase 4, a valve plate assembly 162 installed in the crankcase 4 and cooperating with each other, a cylinder 163, and a piston connecting rod assembly 164. The eccentric wheel 8 drives the piston connecting rod assembly 164 to move, and the exhaust port is disposed on the top cylinder head 161.

[0036] Working principle: External air flows into the air filter 2 through the air filter inlet 21, and after filtration, enters the air intake passage 12 of the motor housing 1 through the intake pipe 11. The air flows to both sides, entering the crankcases 4 on both sides respectively. The air flowing into the crankcases 4 enters the compression chamber of their respective cylinders 163 through their respective piston connecting rod assemblies 164. The gas, compressed to a certain pressure by the reciprocating motion of the piston, flows through the valve plate assembly 162 into the top cylinder head 161. The compressed gas flows through the exhaust port of the top cylinder head 161 to the exhaust pipe 10, and then enters the air inlet 131 of the cooler 13. After being cooled by the cooling passage 133 of the cooler 13, the gas is discharged from the outlet 132, thus obtaining cooled compressed gas. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0037] The embodiments described above are merely preferred embodiments of the present invention, and are described in a relatively specific and detailed manner. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any improvements made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An oil-free air compressor integrating an air filter and a cooler, characterized in that, The system includes a motor housing (1), an air filter (2), a crankcase (4), a motor shaft (5), a cooling fan (6), an eccentric wheel (8), an exhaust pipe (10), an intake pipe (11), a cooler (13), and a cylinder assembly (16). The air filter (2) is mounted on the top of the motor housing (1), and the crankcases (4) are mounted on both ends of the motor housing (1). The motor housing (1) has an intake channel (12) that communicates with the two crankcases (4). The air filter (2) has an air filter inlet (21), which is connected to the intake channel (12) through the intake pipe (11). There are two cooling fans (6), which are respectively installed in the two crankcases. (4) On the outside, the motor shaft (5) is installed inside the motor housing (1). The eccentric wheel (8) is installed on both ends of the motor shaft (5). A pair of cylinder assemblies (16) are installed on each crankcase (4). Each cylinder assembly (16) has an exhaust port connected to the intake channel (12). The cooler (13) is provided below the motor housing (1). The cooler (13) has a cooling channel (133) inside. Each exhaust port is connected to the exhaust pipe (10). One end of the exhaust pipe (10) is connected to the intake port (131) on one side of the cooler (13). The other side of the cooler (13) has an exhaust port (132).

2. The oil-free air compressor integrating an air filter and cooler according to claim 1, characterized in that, The motor housing (1) is made by stretching and is integrally formed with the air intake channel (12).

3. The oil-free air compressor integrating an air filter and cooler according to claim 1, characterized in that, The top of the motor housing (1) is provided with an air filter mounting hole (3) for installing the air filter (2).

4. An oil-free air compressor integrating an air filter and cooler according to claim 1, characterized in that, The cooling fan (6) is connected to the eccentric wheel (8) via a coupling (9). The cooling fan (6) is provided with an air guide shroud (7) on its outer side, and an opening is provided below the air guide shroud (7).

5. An oil-free air compressor integrating an air filter and cooler according to claim 1, characterized in that, The cooler (13) has a base plate (15) installed on both sides, and the base plate (15) has a cooler mounting hole (151) for cooperating with the cooler (13) for installation.

6. An oil-free air compressor integrating an air filter and cooler according to claim 5, characterized in that, Both sides of the crankcase (4) are provided with feet, and shock-absorbing pads (14) are installed between the feet and the base plate (15).

7. An oil-free air compressor integrating an air filter and cooler according to claim 5, characterized in that, The bottom of the base plate (15) is provided with a support block (152).

8. An oil-free air compressor integrating an air filter and cooler according to claim 1, characterized in that, The cylinder assembly (16) includes a top cylinder head (161) disposed on the crankcase (4), a valve plate assembly (162) installed in the crankcase (4) and cooperating with each other, a cylinder (163), and a piston connecting rod assembly (164), wherein the eccentric wheel (8) drives the piston connecting rod assembly (164) to move.

9. An oil-free air compressor integrating an air filter and cooler according to claim 7, characterized in that, The exhaust port is located on the top cylinder head (161).

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