Front precooler of oilless air compressor

Abstract

The utility model discloses a front precooler of an oilless air compressor, which comprises a precooler and a cleaning scrubbing brush, two ends of the precooler are respectively and integrally connected with an air inlet pipe and an air outlet pipe, a plurality of vent holes are arranged in the air inlet pipe and the air outlet pipe, a plurality of cooling pipes are arranged in the precooler, and the cleaning scrubbing brush is arranged in the precooler. The two ends of the cooling pipe communicate with the ventilation holes, heat dissipation fins are arranged on the outer wall of the cooling pipe, a cooling base is arranged on the outer wall of one side of the pre-cooler, and supporting rods are arranged on the inner walls of the top and the bottom of the cooling base correspondingly. The multiple cooling pipes can disperse entering large-flow air, heat in the air in the cooling pipes is dissipated out through the cooling fins, the first motor drives the fan blades to rotate, cold air refrigerated by the semiconductor chilling plate can be sucked into the precooler to fully exchange heat with the air in the cooling pipes, and the cooling effect is improved. And a dispersed cooling mode is adopted, so that air in the cooling pipe can be fully cooled, and the cooling effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-free air compressors, and particularly relates to a pre-cooler for an oil-free air compressor. Background Art

[0002] An oil-free air compressor is the main body in an air source device. It is a device that converts the mechanical energy of a prime mover (usually an electric motor) into gas pressure energy and is a pneumatic pressure generating device for compressed air; it can achieve the effects of energy conservation, pollution reduction, and reduction of enterprise production costs. When an oil-free dry air compressor compresses air, since a large amount of heat is generated when the air is compressed inside the oil-free air compressor, in order to reduce the heat generated by the air inside the oil-free air compressor, it is usually necessary to pre-cool the air entering the oil-free air compressor to lower the air temperature, so that the temperature inside the oil-free dry air compressor will not be too high during compression.

[0003] For example, the pre-cooler for an oil-free air compressor with the publication number CN102400894U and the publication date April 4, 2012, includes a cylindrical body 4. An air outlet 1 is provided at the front end of the cylindrical body 4, and an air inlet 3 is provided at the rear end; a cavity 2 is provided inside; the cavity 2 is an ellipsoid; the cylindrical body 4 is a cylinder.

[0004] In the above and in the prior art, when air enters the interior of the pre-cooler, usually a single pipe is used for air intake. The intake air flow rate is too large, and the entering air cannot be fully cooled, resulting in poor cooling effect. Therefore, it is urgent to design a pre-cooler for an oil-free air compressor to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pre-cooler for an oil-free air compressor to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An oil-free air compressor pre-cooler includes a pre-cooler and a cleaning brush. Both ends of the pre-cooler are integrally connected with an air inlet pipe and an air outlet pipe respectively. A number of ventilation holes are provided inside both the air inlet pipe and the air outlet pipe. A number of cooling pipes are arranged inside the pre-cooler, and both ends of the cooling pipes are communicated with the ventilation holes. Heat dissipation fins are arranged on the outer wall of the cooling pipes. A cooling seat is arranged on the outer wall of one side of the pre-cooler. Support rods are arranged on the inner walls of the top and bottom of the cooling seat. The other ends of the support rods away from the inner wall of the cooling seat are fixed with a motor one by bolts, and a fan blade is arranged on the output shaft of the motor one. A semiconductor refrigeration sheet is arranged inside the cooling seat, and the hot end of the semiconductor refrigeration sheet faces the outside of the cooling seat, and the cold end of the semiconductor refrigeration sheet faces the inside of the cooling seat. A baffle is arranged on the inner wall of the cooling seat, and air inlet nets are arranged on the outer walls of the top and bottom of the cooling seat. An air outlet net is arranged on the outer wall of the front of the pre-cooler.

[0008] Further, a filter screen is arranged on the inner wall of the air inlet pipe, and a rotating rod is rotatably connected to the inner wall of the filter screen through a bearing.

[0009] Further, cleaning brushes are arranged on the outer wall of the rotating rod, and the bristles of the cleaning brushes extend into the filter screen. The two cleaning brushes are respectively located on both sides of the filter screen.

[0010] Further, a gear is welded to one end of the rotating rod. An electric push rod is arranged on the outer wall of the top of the air inlet pipe, and a toothed plate engaged with the gear is arranged on the output end of the electric push rod.

[0011] Further, the cleaning brush is slidably sleeved on the outside of the cooling pipe and the heat dissipation fin, and a motor two is fixed to the outer wall of one side of the pre-cooler by bolts.

[0012] Further, a lead screw is arranged on the output shaft of the motor two, and the cleaning brush is threadedly sleeved on the outside of the lead screw.

[0013] Further, guide rods are arranged on the inner wall of the pre-cooler, and the cleaning brush is slidably sleeved on the outside of the guide rods.

[0014] In the above technical solution, a pre-cooler for an oil-free air compressor provided by the present utility model: (1) Through the provided air inlet pipe, cooling pipes, heat dissipation fins, cooling seat, support rods, motor 1, semiconductor refrigeration sheet, air inlet net, baffle, air outlet net and fan blades, multiple cooling pipes can disperse the large-flow air entering, and the heat in the air inside the cooling pipes is dissipated through the heat dissipation fins. Motor 1 drives the fan blades to rotate, which can draw the cold air refrigerated by the semiconductor refrigeration sheet into the interior of the pre-cooler to fully exchange heat with the air inside the cooling pipes. Adopting the method of dispersed cooling can fully cool the air inside the cooling pipes, making the cooling effect better; (2) Through the provided air inlet pipe, filter screen, rotating rod, cleaning brush, gear, electric push rod and toothed plate, the filter screen can filter the air entering the interior of the pre-cooler to prevent dust from depositing after entering the interior of the oil-free air compressor. The electric push rod can drive the toothed plate to lift and engage with the gear, enabling the gear to drive the rotating rod and the cleaning brush to rotate, and the cleaning brush can clean the dust on the filter screen, realizing the self-cleaning function; (3) Through the provided cleaning plate brush, motor 2, lead screw and guide rod, motor 2 can drive the lead screw to rotate and thread with the cleaning plate brush, enabling the cleaning plate brush to move outside the heat dissipation fins, and can sweep away the dust on the heat dissipation fins, preventing the dust on the heat dissipation fins from affecting the heat dissipation and cooling of the air inside the cooling pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0016] Figure 1 FIG. 1 is a schematic three-dimensional structure diagram provided by an embodiment of a pre-cooler for an oil-free air compressor of the present utility model.

[0017] Figure 2 FIG. 2 is a schematic internal front view structure diagram provided by an embodiment of a pre-cooler for an oil-free air compressor of the present utility model.

[0018] Figure 3 FIG. 3 is a schematic cross-sectional structure diagram of the air inlet pipe provided by an embodiment of a pre-cooler for an oil-free air compressor of the present utility model.

[0019] Figure 4 FIG. 4 is a schematic internal cross-sectional structure diagram provided by an embodiment of a pre-cooler for an oil-free air compressor of the present utility model.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 1. Pre-cooler; 2. Intake pipe; 3. Filter screen; 4. Rotating rod; 5. Cleaning brush; 6. Gear; 7. Electric push rod; 8. Tooth plate; 9. Ventilation hole; 10. Cooling pipe; 11. Heat dissipation fin; 12. Cooling seat; 13. Support rod; 14. Motor 1; 15. Thermoelectric cooler; 16. Inlet air net; 17. Baffle; 18. Outlet air net; 19. Cleaning plate brush; 20. Motor 2; 21. Lead screw; 22. Guide rod; 23. Outlet pipe; 24. Fan blade. Detailed implementation mode

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0023] As Figures 1-4 shown, a pre-cooler for an oil-free air compressor provided by an embodiment of the present utility model includes a pre-cooler 1 and a cleaning plate brush 19. The two ends of the pre-cooler 1 are integrally connected with an intake pipe 2 and an outlet pipe 23 respectively, and a plurality of ventilation holes 9 are opened in the interiors of the intake pipe 2 and the outlet pipe 23. A plurality of cooling pipes 10 are arranged inside the pre-cooler 1, and both ends of the cooling pipes 10 are communicated with the ventilation holes 9. Heat dissipation fins 11 are arranged on the outer walls of the cooling pipes 10. A cooling seat 12 is arranged on the outer wall of one side of the pre-cooler 1, and support rods 13 are arranged on the inner walls of the top and bottom of the cooling seat 12. The other ends of the support rods 13 far away from the inner walls of the cooling seat 12 are fixed by bolts with a motor 1 14, and a fan blade 24 is arranged on the output shaft of the motor 1 14. A thermoelectric cooler 15 is arranged inside the cooling seat 12, and the hot end of the thermoelectric cooler 15 faces the outside of the cooling seat 12, and the cold end of the thermoelectric cooler 15 faces the inside of the cooling seat 12. A baffle 17 is arranged on the inner wall of the cooling seat 12, and inlet air nets 16 are arranged on the outer walls of the top and bottom of the cooling seat 12. An outlet air net 18 is arranged on the outer wall of the front of the pre-cooler 1.

[0024] An oil-free air compressor pre-cooler provided by the utility model comprises a pre-cooler 1 and a cleaning brush 19. The two ends of the pre-cooler 1 are integrally connected with an air inlet pipe 2 and an air outlet pipe 23 respectively. A plurality of ventilation holes 9 are formed in the interiors of the air inlet pipe 2 and the air outlet pipe 23. A plurality of cooling pipes 10 are arranged inside the pre-cooler 1, and both ends of the cooling pipes 10 are communicated with the ventilation holes 9. Heat dissipation fins 11 are arranged on the outer walls of the cooling pipes 10. A cooling seat 12 is arranged on the outer wall of one side of the pre-cooler 1. Support rods 13 are arranged on the inner walls of the top and bottom of the cooling seat 12. The other ends of the support rods 13 far away from the inner walls of the cooling seat 12 are fixed with a first motor 14 by bolts, and a fan blade 24 is arranged on the output shaft of the first motor 14. A semiconductor refrigeration sheet 15 is arranged inside the cooling seat 12, and the hot end of the semiconductor refrigeration sheet 15 faces the outside of the cooling seat 12, while the cold end of the semiconductor refrigeration sheet 15 faces the inside of the cooling seat 12. A baffle 17 is arranged on the inner wall of the cooling seat 12, and air inlet nets 16 are arranged on the outer walls of the top and bottom of the cooling seat 12. An air outlet net 18 is arranged on the outer wall of the front of the pre-cooler 1. When the oil-free air compressor works, a large flow of air is drawn into the air inlet pipe 2. The large flow of air is dispersed into the interiors of a plurality of cooling pipes 10. The semiconductor refrigeration sheet 15 cools the air inside the cooling seat 12. The first motor 14 is started to drive the fan blade 24 to rotate, so that the cold air after being cooled by the semiconductor refrigeration sheet 15 enters the interior of the pre-cooler 1 to exchange heat with the air inside the cooling pipes 10. This structure adopts a decentralized cooling method, and can better cool the air inside the cooling pipes 10.

[0025] By arranging: a plurality of cooling pipes 10 can disperse the incoming large flow of air. The heat in the air inside the cooling pipes 10 is dissipated through the heat dissipation fins 11. The first motor 14 drives the fan blade 24 to rotate, which can draw the cold air cooled by the semiconductor refrigeration sheet 15 into the interior of the pre-cooler 1 to fully exchange heat with the air inside the cooling pipes 10. Adopting the decentralized cooling method can fully cool the air inside the cooling pipes 10, making the cooling effect better.

[0026] In an embodiment provided by the utility model, as Figure 2 and Figure 3 shown, a filter screen 3 is arranged on the inner wall of the air inlet pipe 2. A rotating rod 4 is rotatably connected to the inner wall of the filter screen 3 through a bearing. The filter screen 3 can filter the air entering the interior of the pre-cooler 1.

[0027] In another embodiment provided by the utility model, as Figure 2 and Figure 3 shown, cleaning brushes 5 are arranged on the outer wall of the rotating rod 4, and the bristles of the cleaning brushes 5 extend into the interior of the filter screen 3. The two cleaning brushes 5 are respectively located on both sides of the filter screen 3. The cleaning brushes 5 can remove the dust on the filter screen 3.

[0028] In another embodiment provided by the present utility model, as Figure 2 and Figure 3 shown, one end of the rotating rod 4 is welded with a gear 6. An electric push rod 7 is arranged on the outer wall of the top of the air inlet pipe 2, and a toothed plate 8 engaged with the gear 6 is arranged on the output end of the electric push rod 7. The electric push rod 7 can drive the toothed plate 8 to lift and engage with the gear 6.

[0029] In an embodiment provided by the present utility model, as Figure 2 and Figure 4 shown, the cleaning brush 19 is slidably sleeved outside the cooling pipe 10 and the heat dissipation fins 11. A second motor 20 is fixed to the outer wall of one side of the pre-cooler 1 by bolts. When the cleaning brush 19 moves, it can clean the dust on the heat dissipation fins 11.

[0030] In another embodiment provided by the present utility model, as Figure 2 and Figure 4 shown, a lead screw 21 is arranged on the output shaft of the second motor 20, and the cleaning brush 19 is threadedly sleeved outside the lead screw 21. The second motor 20 can drive the lead screw 21 to rotate and thread with the cleaning brush 19.

[0031] In another embodiment provided by the present utility model, as Figure 2 and Figure 4 shown, guide rods 22 are arranged on the inner wall of the pre-cooler 1, and the cleaning brush 19 is slidably sleeved outside the guide rods 22. The guide rods 22 can play a guiding role for the cleaning brush 19.

[0032] Working principle: When the oil-free air compressor works, it will draw in a large flow of air into the intake pipe 2, and then disperse it into the inside of the cooling pipe 10. The heat in the air inside the cooling pipe 10 is dissipated into the inside of the pre-cooler 1 through the heat dissipation fins 11. Start the first motor 14 to drive the fan blade 24 to rotate, and draw the air outside the pre-cooler 1 into the inside of the cooling seat 12 through the air inlet net 16. The semiconductor refrigeration sheet 15 cools the air inside the cooling seat 12, and then the cold air enters the inside of the pre-cooler 1 to exchange heat with the air inside the cooling pipe 10. This structure adopts the method of decentralized cooling, which can better cool the air inside the cooling pipe 10 and can fully cool it. The heat is dissipated through the air outlet net 18. The cooled air inside the cooling pipe 10 enters the inside of the oil-free air compressor through the air outlet pipe 23. When the air passes through the intake pipe 2, the filter screen 3 can filter the air entering the inside of the pre-cooler 1 to prevent dust from depositing after entering the inside of the oil-free air compressor. Starting the electric push rod 7 can drive the toothed plate 8 to lift and engage with the gear 6, which can make the gear 6 drive the rotating rod 4 and the cleaning brush 5 to rotate. The cleaning brush 5 can clean the dust on the filter screen 3, realizing the self-cleaning function. When the pre-cooler 1 is not running, starting the second motor 20 can drive the lead screw 21 to rotate and thread with the cleaning plate brush 19, which can make the cleaning plate brush 19 move outside the heat dissipation fins 11. The cleaning plate brush 19 can sweep away the dust on the heat dissipation fins 11. Cooperating with the first motor 14 to drive the fan blade 24 to rotate, the dust is discharged through the air outlet net 18, which can prevent the dust on the heat dissipation fins 11 from affecting the heat dissipation and cooling of the air inside the cooling pipe 10, realizing the self-cleaning function.

[0033] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A precooler for an oil-free air compressor, comprising a precooler (1) and a cleaning brush (19), characterized in that: The two ends of the precooler (1) are respectively connected to an air inlet pipe (2) and an air outlet pipe (23) in one piece, and a plurality of ventilation holes (9) are provided inside the air inlet pipe (2) and the air outlet pipe (23). The precooler (1) is provided with a plurality of cooling pipes (10), and both ends of the cooling pipes (10) are connected to the ventilation holes (9). The outer wall of the cooling pipes (10) is provided with heat dissipation fins (11). A cooling seat (12) is provided on the outer wall of one side of the precooler (1), and support rods (13) are provided on the inner walls of the top and bottom of the cooling seat (12), and the support rods (13) are away from the cooling A motor (14) is fixed to the other end of the inner wall of the seat (12) by bolts, and a fan blade (24) is arranged on the output shaft of the motor (14); a semiconductor cooling plate (15) is arranged inside the cooling seat (12), and the hot end of the semiconductor cooling plate (15) faces the outside of the cooling seat (12), and the cold end of the semiconductor cooling plate (15) faces the inside of the cooling seat (12); a baffle (17) is arranged on the inner wall of the cooling seat (12), and air inlet nets (16) are arranged on the outer walls of the top and bottom of the cooling seat (12); and an air outlet net (18) is arranged on the outer wall of the front of the precooler (1).

2. The oil-free air compressor precooler according to claim 1, characterized in that: A filter screen (3) is arranged on the inner wall of the air intake pipe (2), and a rotating rod (4) is rotatably connected to the inner wall of the filter screen (3) via a bearing.

3. The oil-free air compressor precooler according to claim 2, characterized in that: A cleaning brush (5) is arranged on the outer wall of the rotating rod (4), and the bristles of the cleaning brush (5) extend into the interior of the filter screen (3), and the two cleaning brushes (5) are respectively located on both sides of the filter screen (3).

4. The oil-free air compressor precooler according to claim 3, characterized in that: A gear (6) is welded to one end of the rotating rod (4), an electric push rod (7) is arranged on the outer wall of the top of the air inlet pipe (2), and a toothed plate (8) is arranged on the output end of the electric push rod (7) to mesh with the gear (6).

5. The oil-free air compressor precooler according to claim 4, characterized in that: The cleaning brush (19) is slidably sleeved on the outside of the cooling pipe (10) and the heat dissipation fins (11), and a second motor (20) is fixed to the outer wall of one side of the precooler (1) by means of bolts.

6. The oil-free air compressor precooler according to claim 5, characterized in that: A screw rod (21) is arranged on the output shaft of the second motor (20), and the cleaning brush (19) is threadedly sleeved on the outside of the screw rod (21).

7. The oil-free air compressor precooler according to claim 6, characterized in that: A guide rod (22) is provided on the inner wall of the precooler (1), and a cleaning brush (19) is slidably sleeved on the outside of the guide rod (22).

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