Automatic water feeding and reclaimed water recycling system for air compressor

Abstract

The application discloses an air compressor automatic water conveying and reclaimed water recycling system and relates to the technical field of air compressor automatic water conveying, which comprises an air compressor frame and a condensate water recovery cylinder arranged on one side. Symmetrical air compressors are arranged on the air compressor frame. A flow guide pipe is communicated with a drain valve at the bottom of the air compressor. The flow guide pipe is communicated with the condensate water recovery cylinder after being combined. The application is provided with a rotary sealing assembly and a reverse flushing structure, realizes online precise flushing of filter elements, and can complete filter element maintenance without stopping and disassembling. The design of the communication between the dosing box and the purification cover realizes deep purification treatment of the reclaimed water. The stepping rotary flushing mode is used to sequentially perform online cleaning on multiple groups of filter elements, significantly improves the service life of the filter elements and the continuous operation capacity of the system, and the purified reclaimed water is automatically conveyed to a circulating water system by a water pump to replace part of fresh water supplement, thereby forming a closed loop process of 'collection, filtration, dosing and reuse'.

Description

Technical Field

[0001] This invention relates to the field of automatic water supply technology for air compressors, specifically to an automatic water supply and greywater recycling system for air compressors. Background Technology

[0002] An air compressor is a device used to compress air. It is widely used in industrial production, construction, transportation and other fields. It is an indispensable power equipment in modern manufacturing. During the operation of an air compressor, the air temperature rises after being compressed. When it is cooled by a cooler, the water vapor in the air will condense into liquid water, forming condensate. Taking an oil-free screw air compressor as an example, the amount of condensate produced during its operation is considerable. If it is discharged directly without treatment, it will not only cause serious waste of water resources, but also pollute the environment due to the oil and impurities that may be carried in the condensate. To address this issue, various condensate treatment technologies have been proposed in the industry. Among the existing technologies, the patent with authorized publication number CN212109604U discloses a condensate elimination system and compressor assembly. The condensate is atomized by an atomizing device and then discharged into the air. Although this can solve the environmental problem of direct discharge, it does not achieve the recycling of water resources. Another approach uses a simple collection and reuse method. For example, patent application CN102345857A discloses a condensate recovery device that collects condensate in a storage tank and reuses it directly. However, this approach lacks effective purification methods. Oil and impurities carried in the condensate can affect the quality of the reused water, and long-term use can easily cause pipe blockage or equipment damage. In addition, condensate recovery systems equipped with filtration devices have appeared on the market. For example, patent CN220237994U discloses a condensate recovery filtration device for an air compressor condensate reuse system. It filters the condensate by setting a filter screen in the drain pipe. However, the filter screen needs to be disassembled, cleaned, or replaced regularly, and maintenance requires stopping the machine, which affects the continuous operating efficiency of the system. A comprehensive analysis of existing technologies reveals the following main technical shortcomings: First, purification and maintenance are difficult to balance. Although existing condensate recovery devices can be equipped with filter elements and other filtration components, the filter elements will gradually become clogged with oil and impurities during long-term use. They need to be shut down regularly for disassembly, cleaning or replacement. The maintenance process is cumbersome and affects the continuous operation of the system. Although some solutions facilitate disassembly by setting up drain seats, sealing covers and other structures, manual intervention is still required, and online maintenance cannot be achieved. Second, the filter element rinsing method is singular and the effect is limited. Existing technologies mostly involve offline cleaning or simple backwashing of filter elements, lacking a structural design for selective and precise rinsing of multiple filter elements. This results in short filter element lifespan, high replacement frequency, and increased operation and maintenance costs. Third, the capacity for deep treatment of greywater is insufficient. Most existing condensate recovery devices only have simple filtration functions and cannot add chemicals online to adjust pH or perform deep purification according to water quality conditions. This limits the applicability of greywater recovery and makes it difficult to meet the water quality requirements of different industrial water use scenarios. Therefore, we propose an automatic water supply and greywater recycling system for air compressors. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic water supply and greywater recycling system for air compressors, thereby solving the problems mentioned in the background art; To achieve the above objectives, the present invention provides the following technical solution: an automatic water supply and greywater recycling system for an air compressor, comprising an air compressor frame and a condensate recovery cylinder disposed on one side, wherein air compressors are symmetrically arranged on the air compressor frame, and a guide pipe is connected to the drain valve at the bottom of the air compressor, and the guide pipes are combined and connected to the condensate recovery cylinder. A partition is welded and fixed to the inner wall of the condensate recovery cylinder. The partition has a ring of through holes and mounting holes. A purification hood is welded and fixed to the partition on the side opposite to the through holes and mounting holes. A filter element is threaded to the mounting hole on the inner side of the purification hood. A sealing cover is installed at the center of the purification hood. Inside the sealing cover and on the partition, a rotary sealing assembly with fixed-point communication is movably connected. The rotary sealing assembly includes a U-shaped cover set on the partition. One side of the U-shaped cover passes through the partition and is movably connected to it. A grooved cylinder is slidably connected to the center side of the U-shaped cover. The grooved cylinder passes through the U-shaped cover and is slidably connected to it. A receiving cylinder is slidably connected to the other side of the U-shaped cover. The receiving cylinder also passes through the U-shaped cover and is slidably connected to it. A rotating rod is rotatably connected inside the U-shaped cover and on the opposite side of the receiving cylinder and the grooved cylinder. The grooves on both sides of the rotating rod are engaged with the protrusions on the side walls of the receiving cylinder and the grooved cylinder. The synchronous movement of the receiving cylinder and the grooved cylinder is achieved through the linkage of the rotating rod.

[0004] Furthermore, the receiving cylinder and the trough cylinder are connected by a connecting groove inside the U-shaped cover. The receiving groove is fitted with a sealing ring on the outside of the U-shaped cover, and the trough cylinder is fitted with a sealing ring on the inside of the U-shaped cover.

[0005] Furthermore, an abutment protrusion is welded and fixed to the inner wall of the bottom of the condensate recovery cylinder. The protrusion on the abutment protrusion corresponds to the mounting hole on the partition. When the U-shaped cover rotates and carries the receiving cylinder to contact the protrusion on the abutment protrusion, the receiving cylinder is passively moved upward and its port is sealed to the mounting hole.

[0006] Furthermore, a central pipe is fixedly connected to the outer wall of the condensate recovery cylinder. One end of the central pipe passes through the purification hood and the sealing hood respectively and is movably connected to the top of the U-shaped hood. The other end of the central pipe is fixedly connected to a temporary storage cylinder, on which flow channel one and flow channel two are installed.

[0007] Furthermore, a stirring sleeve is installed inside the condensate recovery cylinder, with one end of the stirring sleeve being movably connected to the sealing cover. The stirring is driven by a motor at the top of the condensate recovery cylinder.

[0008] Furthermore, a drive shaft is movably connected inside the condensate recovery cylinder. One end of the drive shaft passes through the sealing cover and rotates the U-shaped cover by means of a sleeved gear and a gear shaft installed inside the sealing cover. The other end of the drive shaft is driven by a motor on the top of the sealing cover. A dosing tank is installed on the top of the condensate recovery cylinder, and the dosing tank is connected to the purification cover through a connecting pipe.

[0009] Furthermore, the side wall of the purification hood inside the condensate recovery cylinder is provided with a water outlet pipe, which is connected to an externally installed water pump. After purification, the condensate is discharged and recycled. The air compressor intake valve on the air compressor frame is connected to an intake pipe.

[0010] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a closed-loop system for condensate water “collection-purification-reuse”, achieving dual optimization of resource recycling and operating costs. The drain valves at the bottom of two air compressors are connected in parallel through a guide pipe and collected into a condensate water recovery tank. The condensate water recovery tank adopts a sealed filtration structure consisting of a baffle, an annular filter element, and a purification hood, forming a forced filtration path “from the outside to the inside” to ensure stable effluent water quality. At the same time, the top chemical dosing tank is directly connected to the purification hood through a pipeline, allowing for the online addition of pH adjusters and other chemicals to deeply treat the greywater. The purified greywater is automatically pumped to the circulating water system to replace part of the fresh water, forming a closed-loop process of “collection-filtration-chemical dosing-reuse”, effectively reducing the enterprise’s water intake costs and external discharge pressure, and combining economic efficiency and environmental protection. 2. This invention integrates a rotary sealing assembly and a backwashing structure inside the condensate recovery cylinder. Through a lever-type linkage mechanism consisting of a U-shaped cover, a trough, a receiving cylinder, and a rotating rod, and in cooperation with the bottom abutment ring, it achieves precise control of "mechanical positioning + linkage sealing". When the drive shaft drives the U-shaped cover to rotate step by step, the receiving cylinder passively moves up at the protruding position and seals with the bottom of the corresponding filter element. The trough moves down simultaneously to open the flushing channel. The purified water is used to backwash the oil and impurities intercepted on the inside of the filter element. The whole process does not require stopping the machine for disassembly and assembly, and does not affect the normal filtration operation of other filter elements. After rinsing, the contaminants are discharged into a temporary storage tank through a central pipe. After settling and stratification, they are discharged separately through a dual-channel system to avoid secondary pollution. This structure integrates three actions—rotation positioning, sealing connection, and channel switching—into a single rotational motion, enabling online cyclic rinsing of multiple filter elements. This significantly improves the service life of the filter elements and the continuous operation capability of the system. Combined with independently controlled stirring sleeves and drive shafts, it allows for parallel operation of chemical mixing and filter element maintenance, avoiding the downtime caused by maintenance in traditional methods. This further improves the system's automation level and operating efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the automatic water supply and greywater recycling device for air compressors of the present invention; Figure 2 This is a schematic diagram of the connection structure between the temporary storage cylinder at the bottom of the air compressor frame and the condensate recovery cylinder of the present invention; Figure 3 This is a schematic diagram of the overall structure of the condensate recovery cylinder of the present invention; Figure 4 This is a schematic diagram of the installation structure of the inner baffle and purification hood of the condensate recovery cylinder of the present invention; Figure 5 This is a schematic diagram of the installation structure of the rotary sealing assembly inside the sealing cover of the present invention; Figure 6 This is a schematic diagram of the rotary sealing assembly of the present invention located at the bottom of the partition plate; Figure 7 This is a schematic diagram of the overall structure of the rotary sealing assembly of the present invention; Figure 8 This is a schematic diagram of the mounting structure of the abutting protrusion ring on the bottom plate of the condensate recovery cylinder of the present invention.

[0012] In the diagram: 1. Air compressor frame; 2. Inlet pipe; 3. Condensate recovery cylinder; 4. Guide pipe; 5. Dosing tank; 6. Partition plate; 7. Purification hood; 8. Filter element; 9. Stirring sleeve; 10. Drive shaft; 11. Sealing cover; 12. Rotary sealing assembly; 121. U-shaped cover; 122. Groove cylinder; 123. Rotating rod; 124. Receiving cylinder; 13. Connecting groove; 14. Sealing ring; 15. Abutment protrusion ring; 16. Central through pipe; 17. Temporary storage cylinder; 18. Flow channel one; 19. Flow channel two. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-8 The present invention provides a technical solution: Example 1: The automatic water supply and greywater recycling system for air compressors of the present invention, through an integrated condensate collection and automatic water supply structure, realizes the real-time collection, purification and recycling of condensate during the operation of air compressors, replacing the traditional manual discharge mode, reducing the amount of fresh water replenishment and external drainage, and improving water resource utilization efficiency. In specific operations, such as Figure 1 and Figure 2 As shown, two sets of air compressors are symmetrically arranged on the air compressor frame 1. The drain valves at the bottom of each air compressor are connected in parallel through the guide pipe 4 and then connected to the condensate recovery cylinder 3. This connection method centrally transports the condensate from multiple air compressors, avoiding the messy pipelines and maintenance difficulties caused by decentralized discharge, and at the same time creating conditions for subsequent unified purification treatment. The condensate generated during the operation of the air compressor is automatically discharged under air pressure and collected into the condensate recovery cylinder 3 through the guide pipe 4, realizing the transformation from "decentralized discharge" to "centralized collection" and laying the foundation for subsequent automated water supply. The condensate recovery cylinder 3 is equipped with a baffle 6 inside. The baffle 6 has through holes and mounting holes arranged in a ring. The mounting holes are threaded to the filter element 8. The filter element 8 is covered with a purification cover 7, which is used to initially intercept and filter oil and suspended impurities in the condensate. The annular sealing connection structure between the baffle 6, the filter element 8, and the purification cover 7 makes the condensate form a "from the outside to the inside" filtration path in the cylinder. All condensate entering the cylinder must pass through the filter element 8 before it can be discharged, which effectively ensures the quality of the effluent. After being filtered by filter element 8, the condensate enters the area between purification hood 7 and sealing hood 11. Through the water outlet pipe set on the side wall of purification hood 7 and the external water pump, the purified water is transported to the circulating water system to replace part of the fresh water. This process realizes the resource transformation of condensate from "waste" to "circulating water", reducing the enterprise's water intake cost and external discharge pressure. At the same time, a dosing tank 5 is set on the top of the condensate recovery cylinder 3. The dosing tank 5 is connected to purification hood 7 through connecting pipes. pH adjuster can be added according to the water quality to carry out deep treatment of the water. This dosing structure is directly connected to the filtration structure, and the agent can directly act on the outside of filter element 8 to improve the water quality of the water and extend the service life of filter element 8. To enable online maintenance and long-term operation of filter element 8, a rotary sealing assembly 12 and a backwashing structure are also installed inside the condensate recovery cylinder 3, such as... Figures 3 to 5 As shown, a rotary sealing assembly 12 with fixed-point communication is movably connected inside the sealing cover 11. This assembly includes a U-shaped cover 121, a groove cylinder 122, a rotating rod 123, and a receiving cylinder 124. The U-shaped cover 121 passes through the partition 6 and is movably connected to it. The groove cylinder 122 and the receiving cylinder 124 are slidably connected to both sides of the U-shaped cover 121, and the two are linked by the rotating rod 123. The grooves on both sides of the rotating rod 123 are respectively engaged with the protrusions on the side walls of the receiving cylinder 124 and the groove cylinder 122, forming a lever-type synchronous movement structure. This linkage structure ensures that the receiving cylinder 124 and the groove cylinder 122 always maintain synchronous "one rising and the other falling" movement inside the U-shaped cover 121. Automatic opening and sealing of the flushing channel can be achieved without additional control elements. The structure is compact and highly reliable. like Figures 6 to 8As shown, a contact ring 15 is welded and fixed to the inner wall of the bottom of the condensate recovery cylinder 3. The contact ring 15 is provided with a protrusion corresponding to the position of the mounting hole of the partition 6. When the drive shaft 10 drives the U-shaped cover 121 to rotate, the receiving cylinder 124 contacts the protrusion on the contact ring 15 during the rotation process. The receiving cylinder 124 is passively moved upward, so that its port is sealed and connected with the corresponding mounting hole and the bottom of the filter element 8. At the same time, the trough cylinder 122 slides downward under the linkage of the rotating rod 123, exposing the connecting groove 13. The sealing ring 14 on the outside of the trough cylinder 122 forms a seal with the inside of the U-shaped cover 121, and the sealing ring 14 on the outside of the receiving cylinder 124 achieves a seal with the mounting hole of the partition 6, thereby creating an independent flushing channel inside the U-shaped cover 121. This "mechanical positioning + linkage sealing" design integrates the three actions of rotation positioning, sealing connection, and channel switching into one rotation movement, realizing precise flushing of the filter element 8 on one side, avoiding interference with other filter elements 8, ensuring uninterrupted operation of the entire purification process, and sealing the entire U-shaped cover 121 to prevent the unpurified water at the bottom of the partition 6 from mixing and being discharged. Purified greywater is introduced and flows back into the filter element 8 from the outside to the inside, flushing away the oil and impurities trapped inside the filter element 8. The flushing water carrying impurities flows along the connecting groove 13 inside the U-shaped cover 121 into the central pipe 16 and finally into the storage cylinder 17. The reverse flushing process uses purified greywater as the flushing medium to clean the filter element 8 without introducing new sources of pollution, realizing a self-cleaning cycle of "washing dirty elements with clean water". The storage cylinder 17 is equipped with flow channel 18 and flow channel 2 19. After the flushing water settles and separates in the storage cylinder 17, the upper layer of oil is discharged through flow channel 2 19 and the lower layer of impurities is discharged through flow channel 18, realizing the classified collection and treatment of pollutants and avoiding secondary pollution caused by mixed discharge.

[0015] Example 2: For online flushing and maintenance of multiple filter elements 8, this system adopts an intermittent circulating flushing strategy to ensure that the continuous operation of the overall greywater purification system is not affected during the flushing of a single filter element 8. like Figure 4 and Figure 5 As shown, a stirring sleeve 9 is installed inside the condensate recovery cylinder 3. One end of the stirring sleeve 9 is movably connected to the sealing cover 11 and is driven by a motor at the top of the condensate recovery cylinder 3. It is used to promote uniform mixing of the agent and the water during the dosing process. The coaxial movable connection between the stirring sleeve 9 and the sealing cover 11 allows the dosing and mixing and the rinsing of the filter element 8 to be carried out simultaneously without interference, thus improving the system operating efficiency. The drive shaft 10 is driven by another motor at the top of the sealing cover 11. Through the engagement of the sleeved gear with the gear shaft installed inside the sealing cover 11, it drives the U-shaped cover 121 to rotate at the bottom of the partition 6 at a set angle. Two sets of motors independently control the stirring and rinsing, enabling parallel operation of processing and maintenance, thus avoiding the downtime of the entire machine due to maintenance in the traditional method; Under normal purification operation, the receiving cylinder 124 of the U-shaped cover 121 is separated from the bottom of each filter element 8. The condensate is filtered by the filter element 8 and discharged normally. When the system enters the flushing mode, the drive shaft 10 drives the U-shaped cover 121 to rotate, so that the receiving cylinder 124 corresponds to the bottom of each filter element 8 in sequence. When the receiving cylinder 124 rotates to the position of abutting the protrusion of the convex ring 15, the receiving cylinder 124 is passively moved upward to achieve a sealed connection with the filter element 8. At the same time, the groove cylinder 122 moves downward to open the flushing channel. After the flushing process continues for a set time, the drive shaft 10 continues to rotate, the receiving cylinder 124 is separated from the protrusion position, and resets under the action of gravity and the rebound of the sealing ring 14. The U-shaped cover 121 returns to the non-flushing state, completing the reverse flushing of a single set of filter elements 8. This "stepping rotation + fixed-point flushing" control method allows the system to flexibly set the flushing frequency and duration according to the degree of pollution of the filter element 8, minimizing the amount of flushing water used while ensuring the filtration effect. Through the above-mentioned step-by-step rotary flushing method, the system can sequentially clean multiple sets of filter elements 8 arranged in a ring online without stopping the machine for disassembly and assembly, which significantly improves the service life of filter elements 8 and the continuous operation capability of the system. The oil and impurities discharged during the flushing process are separated by the temporary storage cylinder 17 and then discharged or recycled in a classified manner to avoid secondary pollution. This system achieves centralized collection of condensate through the parallel collection structure of the guide pipe 4, high-efficiency filtration through the annular sealing structure of the baffle 6, filter element 8 and purification hood 7, online precise flushing of filter element 8 through the linkage structure of the rotary sealing assembly 12 and the abutting convex ring 15, and classified discharge of pollutants through the temporary storage cylinder 17 and the dual-channel structure. The various structures support each other and are interlocked to form a closed-loop system of "collection-filtration-flushing-separation-reuse". It has the advantages of high automation, high water resource recycling rate, convenient filter element maintenance and stable operation. It is deeply integrated with the air compressor operation process, does not increase the burden of additional manual operation, and effectively reduces the enterprise's water cost and wastewater discharge.

[0016] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0017] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic water supply and greywater recycling system for an air compressor, comprising an air compressor frame (1) and a condensate recovery cylinder (3) disposed on one side, characterized in that, Air compressors are symmetrically arranged on the air compressor frame (1). A guide pipe (4) is connected to the drain valve at the bottom of the air compressor. The guide pipe (4) is connected to the condensate recovery cylinder (3) after being merged. A partition (6) is welded and fixed to the inner wall of the condensate recovery cylinder (3). A through hole and a mounting hole are provided on the partition (6) in an annular shape. A purification hood (7) is welded and fixed to the partition (6) on the side opposite to the through hole and the mounting hole. A filter element (8) is threadedly connected to the mounting hole on the inner side of the purification hood (7). A sealing cover (11) is installed at the center of the purification hood (7). Inside the sealing cover (11) and on the partition (6), a rotating sealing assembly (12) with fixed-point communication is movably connected. The rotating sealing assembly (12) includes a U-shaped cover (121) set on the partition (6). One side of the U-shaped cover (121) penetrates the partition (6) and is movably connected thereto. A groove (122) is slidably connected to the center side of the U-shaped cover (121). The groove (122) penetrates the U-shaped cover (121) and is slidably connected thereto. A receiving cylinder (124) is slidably connected to the other side of the cover (121). The receiving cylinder (124) also passes through the U-shaped cover (121) and is slidably connected to it. It is located inside the U-shaped cover (121) and is rotatably connected to the opposite side of the receiving cylinder (124) and the groove cylinder (122). The slots on both sides of the rotating rod (123) are engaged with the protrusions on the side walls of the receiving cylinder (124) and the groove cylinder (122), and the receiving cylinder (124) and the groove cylinder (122) move synchronously through the linkage of the rotating rod (123).

2. The automatic water supply and greywater recycling system for an air compressor according to claim 1, characterized in that, The receiving cylinder (124) and the trough cylinder (122) are connected by a connecting groove (13) inside the U-shaped cover (121). The receiving groove is fitted with a sealing ring (14) on the outside of the U-shaped cover (121), and the trough cylinder (122) is fitted with a sealing ring (14) on the inside of the U-shaped cover (121).

3. The automatic water supply and greywater recycling system for an air compressor according to claim 2, characterized in that, The bottom inner wall of the condensate recovery cylinder (3) is welded and fixed with an abutment protrusion (15). The protrusion on the abutment protrusion (15) is set to correspond to the mounting hole on the partition plate (6). When the U-shaped cover (121) rotates and carries the receiving cylinder (124) to contact the protrusion on the abutment protrusion (15), the receiving cylinder (124) is passively moved upward and its port is sealed to the mounting hole.

4. The automatic water supply and greywater recycling system for an air compressor according to claim 3, characterized in that, The outer wall of the condensate recovery cylinder (3) is connected to a central pipe (16). One end of the central pipe (16) passes through the purification hood (7) and the sealing hood (11) respectively and is movably connected to the top of the U-shaped hood (121). The other end of the central pipe (16) is connected to a temporary storage cylinder (17). The temporary storage cylinder (17) is equipped with a flow channel one (18) and a flow channel two (19).

5. The automatic water supply and greywater recycling system for an air compressor according to claim 4, characterized in that, The condensate recovery cylinder (3) is equipped with a stirring sleeve (9), one end of which is movably connected to the sealing cover (11). The stirring is driven by a motor at the top of the condensate recovery cylinder (3).

6. The automatic water supply and greywater recycling system for an air compressor according to claim 5, characterized in that, The condensate recovery cylinder (3) is movably connected to a drive shaft (10). One end of the drive shaft (10) passes through the sealing cover (11) and rotates the U-shaped cover (121) through a sleeved gear and a gear shaft set inside the sealing cover (11). The other end of the drive shaft (10) is driven by a motor on the top of the sealing cover (11). A dosing box (5) is set on the top of the condensate recovery cylinder (3). The dosing box (5) is connected to the purification cover (7) through a connecting pipe.

7. The automatic water supply and greywater recycling system for an air compressor according to claim 6, characterized in that, The side wall of the purification hood (7) inside the condensate recovery cylinder (3) is provided with a water outlet pipe, which is connected to an external water pump. After purification, the condensate is discharged and recycled. The air compressor intake valve on the air compressor frame (1) is connected to an intake pipe (2).

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